Journal articles: 'Voltage sourced converters'

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Achlerkar, Pankaj D., and Bijaya Ketan Panigrahi. "Robust backstepping output voltage controller for standalone voltage-sourced converters." IET Renewable Power Generation 14, no. 12 (September 7, 2020): 2211–20. http://dx.doi.org/10.1049/iet-rpg.2020.0023.

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Woodford, Dennis. "Voltage-Sourced Converters in Power Systems [Book Reviews]." IEEE Power and Energy Magazine 10, no. 3 (May 2012): 86–89. http://dx.doi.org/10.1109/mpe.2012.2186903.

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Asensio, Andres Pena, Santiago Arnaltes Gomez, Jose Luis Rodriguez-Amenedo, and Miguel Angel Cardiel-Alvarez. "Reactive Power Synchronization Method for Voltage-Sourced Converters." IEEE Transactions on Sustainable Energy 10, no. 3 (July 2019): 1430–38. http://dx.doi.org/10.1109/tste.2019.2911453.

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Opila, Daniel, Keith Kintzley, Spencer Shabshab, and Stephen Phillips. "Virtual Oscillator Control of Equivalent Voltage-Sourced and Current-Controlled Power Converters." Energies 12, no. 2 (January 18, 2019): 298. http://dx.doi.org/10.3390/en12020298.

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The dynamics of a general class of weakly nonlinear oscillators can be used to control power converters to create a self-forming AC network of distributed generators. Many control stability results for these “virtual” oscillators consider the interaction of voltage-source converters, but most practical converters use a nested current loop. This paper develops a general method to extend voltage-source stability results to current-controlled converters using a virtual admittance. A fast current control loop allows a singular perturbations analysis to demonstrate the equivalence of the two. This virtual admittance can also manipulate load sharing between converters without changing the core nonlinear dynamics. In addition, Virtual Oscillator Control is experimentally demonstrated with three-phase voltage-sourced and current-controlled inverters. This validates the equivalence of the two formulations, and extends previous single phase testing into three phases. The extension to current-controlled converters enhances safety and increases the breadth of applications for existing control methods.

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Zhang, Weichao, Xiangwu Yan, and Hanyan Huang. "Adaptive Performance Tuning for Voltage-Sourced Converters with Frequency Responses." Applied Sciences 10, no. 5 (March 10, 2020): 1884. http://dx.doi.org/10.3390/app10051884.

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Renewable generation brings both new energies and significant challenges to the evolving power system. To cope with the loss of inertia caused by inertialess power electronic interfaces (PEIs), the concept of the virtual synchronous generator (VSG) has been proposed. The PEIs under VSG control could mimic the external properties of the traditional synchronous generators. Therefore, the frequency stability of the entire system could be sustained against disturbances mainly caused by demand changes. Moreover, as the parameters in the emulation control processes are adjustable rather than fixed, the flexibility could be enhanced by proper tuning. This paper presents a parameter tuning method adaptive to the load deviations. First, the concept and implementation of the VSG algorithm performing an inertia response (IR) and primary frequency responses (PFR) are introduced. Then, the simplification of the transfer function of the dynamic system of the stand-alone VSG-PEI is completed according to the distributed poles and zeros. As a result, the performance indices during the IR and PFR stages are deduced by the inverse Laplace transformation. Then, the composite influences on the performances by different parameters (including the inertia constant, the speed droop, and the load deviations) are analyzed. Based on the composite influences and the time sequences, an adaptive parameter tuning method is presented. The feasibility of the proposed method is verified by simulation.

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Bahrman, Michael, and Per-Erik Bjorklund. "The New Black Start: System Restoration with Help from Voltage-Sourced Converters." IEEE Power and Energy Magazine 12, no. 1 (January 2014): 44–53. http://dx.doi.org/10.1109/mpe.2013.2285592.

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Daud, Muhamad Zalani, Azah Mohamed, and M. A. Hannan. "An Optimal Control Strategy for DC Bus Voltage Regulation in Photovoltaic System with Battery Energy Storage." Scientific World Journal 2014 (2014): 1–16. http://dx.doi.org/10.1155/2014/271087.

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This paper presents an evaluation of an optimal DC bus voltage regulation strategy for grid-connected photovoltaic (PV) system with battery energy storage (BES). The BES is connected to the PV system DC bus using a DC/DC buck-boost converter. The converter facilitates the BES power charge/discharge to compensate for the DC bus voltage deviation during severe disturbance conditions. In this way, the regulation of DC bus voltage of the PV/BES system can be enhanced as compared to the conventional regulation that is solely based on the voltage-sourced converter (VSC). For the grid side VSC (G-VSC), two control methods, namely, the voltage-mode and current-mode controls, are applied. For control parameter optimization, the simplex optimization technique is applied for the G-VSC voltage- and current-mode controls, including the BES DC/DC buck-boost converter controllers. A new set of optimized parameters are obtained for each of the power converters for comparison purposes. The PSCAD/EMTDC-based simulation case studies are presented to evaluate the performance of the proposed optimized control scheme in comparison to the conventional methods.

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Jiabing Hu and Yikang He. "Modeling and Control of Grid-Connected Voltage-Sourced Converters Under Generalized Unbalanced Operation Conditions." IEEE Transactions on Energy Conversion 23, no. 3 (September 2008): 903–13. http://dx.doi.org/10.1109/tec.2008.921468.

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Fogli, Gabriel A., Rodolfo L. Valle, Pedro M. de Almeida, and Pedro G. Barbosa. "A simple dead-time compensation strategy for grid-connected voltage-sourced converters semiconductor switches." Electric Power Systems Research 174 (September 2019): 105853. http://dx.doi.org/10.1016/j.epsr.2019.04.031.

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Montanari, Allan A., and Aniruddha M. Gole. "Enhanced Instantaneous Power Theory for Control of Grid Connected Voltage Sourced Converters Under Unbalanced Conditions." IEEE Transactions on Power Electronics 32, no. 8 (August 2017): 6652–60. http://dx.doi.org/10.1109/tpel.2016.2627049.

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Wei, X., J. H. Chow, B. Fardanesh, and A. A. Edris. "A Common Modeling Framework of Voltage-Sourced Converters for Load Flow, Sensitivity, and Dispatch Analysis." IEEE Transactions on Power Systems 19, no. 2 (May 2004): 934–41. http://dx.doi.org/10.1109/tpwrs.2004.826753.

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Khederzadeh, Mojtaba, Hamed Maleki, and Vahid Asgharian. "Frequency control improvement of two adjacent microgrids in autonomous mode using back to back Voltage-Sourced Converters." International Journal of Electrical Power & Energy Systems 74 (January 2016): 126–33. http://dx.doi.org/10.1016/j.ijepes.2015.07.002.

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Alzahrani, Ahmad, Pourya Shamsi, and Mehdi Ferdowsi. "Interleaved Multistage Step-Up Topologies with Voltage Multiplier Cells." Energies 13, no. 22 (November 17, 2020): 5990. http://dx.doi.org/10.3390/en13225990.

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This paper proposes a family of high-voltage-gain step-up dc-dc converters for photovoltaic integration application. The proposed converters are capable of converting the low voltage from input sources to a dc bus. The proposed family is constructed of interleaved single-switch multistage boost converters and voltage multiplier cells (VMC). The proposed converters feature low voltage stress across the components, equal current sharing among all phases, and a smooth input current. Moreover, the proposed family of converters has a modular structure in both the VMC and the boost stage. That is, the VMC can have N number of cells, and the boost stage can have k number of stages. The k can be different in each phase, allowing the designers to integrate two independent renewable energy sources with different output voltages. An example converter was explained, analyzed, and simulated. An 80 W hardware prototype was implemented to confirm the converter’s operation and validate the analysis.

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S, Adarsh, and Nagendrappa H. "Duty ratio control ofthree port isolated bidirectional asymmetrical triple active bridge DC-DC converter." International Journal of Power Electronics and Drive Systems (IJPEDS) 12, no. 2 (June 1, 2021): 943. http://dx.doi.org/10.11591/ijpeds.v12.i2.pp943-956.

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Multiport converters are used in interfacing of distributed energy sources with grid/load. Isolated converters are needed in applications where converter gain is high and there is a requirement of isolation. Dual transformer asymmetric triple active bridge offers the advantage of reduced circulating current. However, the operating range is low for variation in load and source voltage. In this paper duty ratio modulation technique is proposed to regulate the load voltage and control the power flow in both the directions. As a result of the new gating scheme, the converter switches operate with ZVS, irrespective of variations in load power and source voltage. The converter is designed to ensure high switch utilization. The control technique is validatedthrough simulation of a 1kW three port DC-DC converter. It was observerd that the load voltage was regulated for wide range of variation in load power and source port voltages. The single input dual output mode was also verified.

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Lakshmi, Shubh, and Sanjib Ganguly. "Modelling and allocation planning of voltage-sourced converters to improve the rooftop PV hosting capacity and energy efficiency of distribution networks." IET Generation, Transmission & Distribution 12, no. 20 (November 13, 2018): 4462–71. http://dx.doi.org/10.1049/iet-gtd.2018.5692.

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Sattianadan, D., G. R. Prudhvi Kumar, R. Sridhar, Kuthuru Vishwas Reddy, Bhumireddy Sai Uday Reddy, and Panga Mamatha. "Investigation of low voltage DC microgrid using sliding mode control." International Journal of Power Electronics and Drive Systems (IJPEDS) 11, no. 4 (December 1, 2020): 2030. http://dx.doi.org/10.11591/ijpeds.v11.i4.pp2030-2037.

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As the requirement of power increases, the use of renewable energy resources has become prominent. The power collected from these energy resources needs to be converted using AC-DC or DC-DC converters. The control of DC-DC converters is a complex task due to its non-linearity in the converter introduced by the external changes such as source voltage, cable resistance and load variations. Converters are to be designed to obtain a well stabilized output voltage and load current for variable source voltages and load changes. Droop control method is the most abundantly used technique in controlling the parallel converters. The major limitations of the conventional droop control technique are circulating current issues and improper load sharing. The proposed work is to resolve these issues by integrating Sliding Mode Controller (SMC) with the converter in order to enhance the performance of DC microgrid. The entire control system was designed by taking the output voltage error as the control variables. Similarly, droop control with PI and PID were also performed and all these techniques were simulated and compared using MATLAB/Simulink. The experimental results show that the proposed sliding mode controller technique provides good overall performance and is suitable against variable voltage and load changes.

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Teixeira, Carlos Coelho, and Helder Leite. "Integration of Voltage Source Converters in Steady-State RMS Short-Circuit Analysis." Energies 14, no. 12 (June 17, 2021): 3610. http://dx.doi.org/10.3390/en14123610.

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Voltage source converters (VSCs) are self-commutated converters able to generate AC voltages with or without the support of an AC connecting grid. VSCs allow fast control of active and reactive powers in an independent way. VSCs also have black start capability. Their use in high-voltage direct current (HVDC) systems, comparative to the more mature current source converter (CSC)-based HVDC, offers faster active power flow control. In addition, VSCs provide flexible reactive power control, independent at each converter terminal. It is also useful when connecting DC sources to weak AC grids. Steady-state RMS analysis techniques are commonly used for early-stage analysis, for design purposes and for relaying. Sources interfaced through DC/AC or AC/DC/AC converters, opposite to conventional generators, are not well represented by electromotive forces (E) behind impedance models. A methodology to include voltage source converters (VSCs) in conventional RMS short-circuit analysis techniques is advanced in this work. It represents an iterative procedure inside general calculation techniques and can even be used by those with only basic power electronics knowledge. Results are compared to those of the commercial software package PSS®CAPE to demonstrate the validity of the proposed rmsVSC algorithm.

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Sladić, Saša, Srđan Skok, and David Nedeljković. "Efficiency Considerations and Application Limits of Single-Phase Active Power Filter with Converters for Photoenergy Applications." International Journal of Photoenergy 2011 (2011): 1–8. http://dx.doi.org/10.1155/2011/643912.

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A new way of connecting PV sources to adaptive voltage active power filter (AV APF) has been compared with classic approach including active power filter (APF). In standard active power filter applications a relatively high DC link voltage (500 V or even more) with a buck converter or lower voltage (approx. 100 V) with boost converter can be used. These two converters appear also in adaptive voltage circuit of AV APF, but in this case it is possible to achieve many different connections of DC source. Benefit of this approach is that the same circuit is used for improving switching conditions in APF and for connection of solar cells. It appears that these two functions support each other and a large variety of DC voltages and currents can be connected to AC mains. Experimental results confirm expectations of increased energy transfer from additional DC source to network, especially for DC voltages being lower than DC link voltage.

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Weise, Bernd. "Impact of K‐factor and active current reduction during fault‐ride‐through of generating units connected via voltage‐sourced converters on power system stability." IET Renewable Power Generation 9, no. 1 (January 2015): 25–36. http://dx.doi.org/10.1049/iet-rpg.2014.0116.

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Beriber, D., A. Talha, and M. Boucherit. "Stabilization of multi DC bus link voltages of multilevel NPC VSI. Application to double stator induction motors." Archives of Control Sciences 22, no. 1 (January 1, 2012): 107–20. http://dx.doi.org/10.2478/v10170-011-0015-1.

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Stabilization of multi DC bus link voltages of multilevel NPC VSI. Application to double stator induction motors Voltage source multilevel inverters have become very attractive for power industries in power electronics applications during last years. The main purposes of studying multilevel inverters are the generation of output voltage signals with low harmonic distortion and reduction of switching frequency. An important issue of the multilevel inverter is the capacitor voltage-balancing problem. The unbalance of different DC voltage sources of multilevel neutral point clamped (NPC) voltage source inverter (VSI) constitutes the major limitation for the use of this new power converter. In this paper, we present study on the stability problem of the input DC voltages of the three-level Neutral Point Clamping (NPC) voltage source inverter (VSI). This inverter is useful for application in high voltage and high power area. In the first part, we remind the model of double stator induction motors (DSIM). Then, we develop control models of this inverter using the connection functions of the semi-conductors. We propose a Pulse Width Modulation (PWM) strategy to control this converter. The inverter is fed by constant input DC voltages. In the last part, we study the stability problem of the input DC voltages of the inverter. A cascade constituted by two three-level PWM rectifiers - two three-level NPC VSI - DSIM is discussed. The results obtained show that the input DC voltages of the inverters are not stable. To solve this problem, we propose to use a half clamping bridge. This solution is very promising in order to stabilize the input DC voltages of this converters.

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G, Ramya, and Ramaprabha R. "A Review on Designand Control Methods of Modular Multilevel Converter." International Journal of Power Electronics and Drive Systems (IJPEDS) 7, no. 3 (September 1, 2016): 863. http://dx.doi.org/10.11591/ijpeds.v7.i3.pp863-871.

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Modular multilevel converters (MMC) are an emerging voltage source converter topology suitable for many applications. Due to abundant utilization of HVDC power transmission, the modular multilevel converter has become popular converter type to be used in high voltage applications. Other applications include interfacing renewable energy power sources to the grid and motor drives. Modular multilevel converters are beneficial for high voltage and high power motor drives because of the properties of this converter topology, such as, low distortion, high efficiency, etc. For the past few years significant research has been carried out to address the technical challenges associated with operation and voltage balancing of MMC. In this paper, a detailed technical review on the control strategies is presented for ready reference.

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Solodyankin, Sergey, and Andrey Pazderin. "Increase of Transient Stability Level of Gas Turbine Power Plant Using FACTS." E3S Web of Conferences 139 (2019): 01049. http://dx.doi.org/10.1051/e3sconf/201913901049.

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The article is devoted to the development of the mathematical models of modern devices of flexible alternating current transmission systems (FACTS) when calculating the modes and stability of power systems and to the analysis of influence of the specified devices on transient stability of the generators. The considered scheme contains the generators with the gas turbine drive that have electromechanical parameters providing lower level of transient stability compared to units of higher power rating, which in some cases requires implementation of measures for transient stability enhancement. As examples of FACTS the following devices have been considered: compensating device based on voltage- sourced converter (STATCOM), static synchronous series compensator (SSSC) and the unified power flow controller (UPFC). The known examples of mathematical models of FACTS devices vary in complexity. For a preliminary assessment of the effectiveness of the FACTS devices, it is proposed to use simplified models that adequately reflect their impact on transients. The use of models made it possible to establish a positive impact of the devices on transient stability of generating equipment in case of short circuits in the electric network. The important conclusion here is that the use of the UPFC device based on two converters (with a corresponding increase in cost) compared to one converter device (STATCOM or SSSC) slightly increases the level of transient stability and the limit time of short circuit disconnection. The proposed method of simulating the FACTS devices is suitable for numerical calculations of transient processes in electric power systems, in particular, to estimate the impact on the transient stability level of the parallel operation of power plants in case of disturbances.

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Ahmad, Javed, Chang-Hua Lin, Mohammad Zaid, Adil Sarwar, Shafiq Ahmad, Mohamed Sharaf, Mazen Zaindin, and Muhammad Firdausi. "A New High Voltage Gain DC to DC Converter with Low Voltage Stress for Energy Storage System Application." Electronics 9, no. 12 (December 4, 2020): 2067. http://dx.doi.org/10.3390/electronics9122067.

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Increasing energy demand globally has led to exploring ways of utilizing renewable resources for sustainable development. More recently, the integration of renewable distributed resources in small- and large-scale grid has been seriously researched. Development in renewable power sources and its integration with the grid require voltage level conversion to match the grid/micro-grid level. The voltage level conversion is brought about by employing Direct Current-Direct Current (DC-DC) converters with boosting features. The paper presents a wide gain range DC-DC boost converter with a low-stress on switching devices. The proposed converter’s voltage gain is high compared with the conventional quadratic boost converter and other recently developed high gain boost converters. The topology has been compared with recently proposed topologies, and comparative analysis based on various performance parameters has shown that the topology is suitable for renewable and sustainable energy storage and grid integration. The power loss analysis has been done by incorporating the switching and conduction losses. A hardware prototype of 150 W has been developed to validate the converter’s performance in steady-state as well as in dynamic conditions.

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Putra, Tri Yogi, and Muldi Yuhendri. "Implementasi Hysterisis Current Control Pulse Witdh Modulation (HCCPWM) Untuk Inverter 3 Fasa." JTEIN: Jurnal Teknik Elektro Indonesia 2, no. 1 (March 23, 2021): 91–97. http://dx.doi.org/10.24036/jtein.v2i1.127.

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Based on the source used, there are several types of converters, one of which is a voltage source converter (VSC). In this study, using a converter that can work as an inverter. In industry, an inverter is useful for supplying the AC voltage source from industrial plants with DC sources, by varying the voltage and output frequency of the inverter. The method used is the HCCPWM generation method or Hysterisis Current Control Pulse Witdh Modulation. This method was chosen because it has several advantages which are good stability, very fast transient response and good accuracy. To activate HCCPWM, a 3 phase reference current signal is first made in the Matlab Simulink, this reference current is then compared with the actual current from the current sensor, then the error is controlled with the hysteresis band. In Arduino mega2560, the pulses generated by HCCPWM in the Matlab Simulink are converted into a duty cycle. The modulated pulse generated by the Arduino PWM pin will be increased using a gate drive circuit, so that the voltage is obtained according to the voltage required by the Mosfet to activate the switch. The results of the tests that have been done show that the voltage source converter (VSC) designed in this study has worked well as intended. This can be seen from the actual current from the current sensor which has been compared with the reference voltage using the HCCPWM method which is included in the Simulink Matlab program.

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Wang, Qin, Yuan Xu, and Lan Xiao. "Single-Primary-Winding Voltage-Fed Double-Input Push-Pull Converter." Advanced Materials Research 461 (February 2012): 241–45. http://dx.doi.org/10.4028/www.scientific.net/amr.461.241.

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Multi-input push-pull converter with multiple-primary-winding is suitable in low and medium-power applications. However, with the increase of input sources, the number of the primary windings and switches increases as well. Based on Pulsating Voltage Source Cells (PVSCs) combination principle, this paper replaces the input voltage source of the single-input push-pull converter with the series or parallel-connected non-isolated pulsating voltage source cells (PVSCs). Thus a family of single-primary-winding (SPW) voltage-fed multi-input push-pull converters can be proposed. Compared with traditional multi-input converters, they have a form of single-Primary-Winding, and therefore we could greatly reduce the size and cost. Since the configuration of a double-input Buck dc/dc converter is very simple, it is chosen as an example in this paper to analysis this MIC. The operation principle and control strategy are illustrated. Finally, simulation and experimental results are presented to verify the correctness of theoretical analysis

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Cipriano dos Santos Júnior, Euzeli, Fabrício Bradaschia, Marcelo Cabral Cavalcanti, and Edison Roberto Cabral da Silva. "Voltage type Z-source converters: overview of the main topologies." Eletrônica de Potência 17, no. 4 (November 1, 2012): 730–43. http://dx.doi.org/10.18618/rep.2012.4.730743.

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Rajaei, Amirhossein, Mahdi Shahparasti, Ali Nabinejad, and Mehdi Savaghebi. "A High Step-Up Partial Power Processing DC/DC T-Source Converter for UPS Application." Sustainability 12, no. 24 (December 14, 2020): 10464. http://dx.doi.org/10.3390/su122410464.

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In this paper, a new modified structure of a DC/DC T-source converter is proposed. Since the proposed converter provides high voltage gain, it is suitable for photovoltaic integration into uninterruptible power supply (UPS) systems. The proposed structure employs partial power processing technique to increase the output voltage as well as efficiency without requiring new hardware. Partial power converters (PPCs) process only a fraction of flowing power while the remaining power directly flows through output. This generally causes an improvement in efficiency and output voltage. A total of two structures are presented: conventional partial power T-source converters and improved partial power T-source converters. The key advantage of the improved partial power converter is a higher voltage gain. Furthermore, it reduces the voltage and the current stresses on switches and diodes. The steady-state operation principles are described for both converters and the governed rules and equations are derived. The PPCs and full power converter are compared in terms of efficiency, voltage gain, voltage stress, and current stress of converter elements. The converter performance is evaluated through experimental and simulation studies. The presented results show good consistency with the theoretical analysis.

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Thayumanavan, Porselvi, Deepa Kaliyaperumal, Umashankar Subramaniam, Mahajan Sagar Bhaskar, Sanjeevikumar Padmanaban, Zbigniew Leonowicz, and Massimo Mitolo. "Combined Harmonic Reduction and DC Voltage Regulation of A Single DC Source Five-Level Multilevel Inverter for Wind Electric System." Electronics 9, no. 6 (June 12, 2020): 979. http://dx.doi.org/10.3390/electronics9060979.

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Wind power generation has increased in the past twenty years due to the development of power electronic converters. Power generation through wind has advantages over other renewable sources, such as having more efficiency, being pollution-free, and its abundant availability. Power electronic converters play a vital role in the wind energy conversion system. This paper presents a wind-electric system with a permanent magnet synchronous generator, diode rectifier, DC-DC converter (buck-Boost or Cuk converter), and a three-phase five-level inverter. The five-level inverter is a modified form of a cascaded H-bridge inverter that uses a single DC source as an input irrespective of several levels and phases. As the wind speed changes, the Permanent Magnet Synchronous Generator (PMSG) voltage and frequency changes, but for practical applications, these changes should not be allowed; hence, a voltage controller is used that maintains the output voltage of a DC converter, andthus a constant AC output is obtained. The DClink voltage is maintained at the desired voltage by a Proportional plus Integral (PI)-based voltage controller. The DC link voltage fed to the multilevel inverter (MLI) is converted to AC to feed the load. The MLI is controlled with a new Selected Harmonic Elimination (SHE), which decreases the total harmonic distortion (THD). The system is simulated with an Resistive plus Inductive (RL) load and is tested experimentally with the same load;the results prove that the Cuk converter has a better efficiency compared to the Buck-Boost converter, and the system has less THD when compared with the conventional SHE Pulse Width Modulation (PWM) technique.

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Gadalla, Brwene Salah, Erik Schaltz, Yam Siwakoti, and Frede Blaabjerg. "Analysis of loss distribution of Conventional Boost, Z-source and Y-source Converters for wide power and voltage range." Transactions on Environment and Electrical Engineering 2, no. 1 (January 1, 2017): 1. http://dx.doi.org/10.22149/teee.v2i1.68.

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Boost converters are needed in many applications which require the output voltage to be higher than the input voltage. Recently, boost type converters have been applied for industrial applications, and hence it has become an interesting topic of research. Many researchers proposed different impedance source converters with their unique advantages as having a high voltage gain in a small range of duty cycle ratio. However, the thermal behaviour of the semiconductor devices and passive elements in the impedance source converter is an important issue from a reliability point of view and it has not been investigated yet. Therefore, this paper presents a comparison between the conventional boost, the Z-source, and the Y-source converters based on a thermal evaluation of the semiconductors. In addition, the three topologies are also compared with respect to their efficiency. In this study the results show that the boost converter has higher efficiency than the Zsource and Y-source converter for these specific voltage gain of 2 and 4. The operational principle, mathematical derivations, simulation results and final comparisons are presented in this paper.

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Kim, Se-Jin, and Young-Cheol Lim. "A Single-Phase Embedded Z-Source DC-AC Inverter." Scientific World Journal 2014 (2014): 1–8. http://dx.doi.org/10.1155/2014/539297.

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In the conventional DC-AC inverter consisting of two DC-DC converters with unipolar output capacitors, the output capacitor voltages of the DC-DC converters must be higher than the DC input voltage. To overcome this weakness, this paper proposes a single-phase DC-AC inverter consisting of two embedded Z-source converters with bipolar output capacitors. The proposed inverter is composed of two embedded Z-source converters with a common DC source and output AC load. Though the output capacitor voltages of the converters are relatively low compared to those of a conventional inverter, an equivalent level of AC output voltages can be obtained. Moreover, by controlling the output capacitor voltages asymmetrically, the AC output voltage of the proposed inverter can be higher than the DC input voltage. To verify the validity of the proposed inverter, experiments were performed with a DC source voltage of 38 V. By controlling the output capacitor voltages of the converters symmetrically or asymmetrically, the proposed inverter can produce sinusoidal AC output voltages. The experiments show that efficiencies of up to 95% and 97% can be achieved with the proposed inverter using symmetric and asymmetric control, respectively.

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Sarala, P., S. F. Kodad, and B. Sarvesh. "Power Factor Correction with Current Controlled Buck Converter for BLDC Motor Drive." International Journal of Power Electronics and Drive Systems (IJPEDS) 8, no. 2 (June 1, 2017): 730. http://dx.doi.org/10.11591/ijpeds.v8.i2.pp730-738.

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Brushless DC motor is a synchronous machine that makes use of electronic commutation instead of mechanical commutator. Brushless DC motors makes use of inverter encompassing static switches for its operation. A simple bridge converter when used for BLDC drive as front end converter makes input source power factor to get reduced which is unacceptable in the power system. To avoid the distortions in the source voltage and source currents, Buck converter which was used as power factor correction (PFC) converter in this paper to improve the power factor. Presence of power electronic converters deteriorates system power factor effecting overall system performance. This paper presents buck converter for power factor correction in brushless DC motor drive system. Buck converter is operated with current control strategy rather to conventional voltage follower control. Simulation model was obtained using MATLAB/SIMULINK software and the brushless DC motor performance characteristics were shown for conditions with different DC link voltages and step variation in DC link voltage. Total harmonic distortion in source current was also presented.

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Sepahvand, Hossein, Jingsheng Liao, Mehdi Ferdowsi, and Keith Corzine. "Capacitor Voltage Regulation in Single-DC-Source Cascaded H-Bridge Multilevel Converters Using Phase-Shift Modulation." Industrial Electronics, IEEE Transactions on 60, no. 9 (May 2013): 3619–26. http://dx.doi.org/10.1109/tie.2012.2206335.

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Cascaded H-bridge multilevel power electronic converters generally require several dc sources. An alternative option is to replace all the separate dc sources feeding the H-bridge cells with capacitors, leaving only one H-bridge cell with a real dc voltage source. This will yield a cost-effective converter. However, the required capacitor voltage balancing is challenging. In this paper, using the phase-shift modulation approach, a new control method for cascaded H-bridge multilevel converters fed with only one independent dc source is presented. The proposed method has a wide voltage regulation range for the replacement capacitors in the H-bridge cells. Experimental and simulation results support the proposed control method.

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Salehi, Navid, Herminio Martínez-García, and Guillermo Velasco-Quesada. "Modified Cascaded Z-Source High Step-Up Boost Converter." Electronics 9, no. 11 (November 17, 2020): 1932. http://dx.doi.org/10.3390/electronics9111932.

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To improve the voltage gain of step-up converters, the cascaded technique is considered as a possible solution in this paper. By considering the concept of cascading two Z-source networks in a conventional boost converter, the proposed topology takes the advantages of both impedance source and cascaded converters. By applying some modifications, the proposed converter provides high voltage gain while the voltage stress of the switch and diodes is still low. Moreover, the low input current ripple of the converter makes it absolutely appropriate for photovoltaic applications in expanding the lifetime of PV panels. After analyzing the operation principles of the proposed converter, we present the simulation and experimental results of a 100 W prototype to verify the proposed converter performance.

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Rao, S. Nagaraja, D. V. Ashok Kumar, and Ch Sai Babu. "Integration of Reversing Voltage Multilevel Inverter Topology with High Voltage Gain boost Converter for Distributed Generation." International Journal of Power Electronics and Drive Systems (IJPEDS) 9, no. 1 (March 1, 2018): 210. http://dx.doi.org/10.11591/ijpeds.v9.i1.pp210-219.

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<table width="0" border="1" cellspacing="0" cellpadding="0"><tbody><tr><td valign="top" width="593"><p>The conventional energy sources available to us are on the verge of depletion. This depletion of conventional energy source leads to concentrate more on alternative energy sources. In this research, the focus is on the role of renewable energy sources (RES) in electrical power generation. Even though, the RES based plants produce power, we cannot directly connect it to the grid or loads. Because, the voltage ratings and nature supply of RES plants would not match with the load. Hence, this is a major issue for connecting RES plants to load or other utility. The power electronic converters are extensively being used as a link between load and supply. As most of the renewable energy power generation is DC in nature, the DC-DC converter is used to increase the voltage level and this DC must be converted to AC for grid connection. Therefore, inverters are used for DC to AC conversion. In this paper, the DC supply of renewable energy is connected to load by using cascade DC-DC converters along with a proposed reversing voltage (RV) multilevel inverter (MLI). The first DC-DC converter is used to enhance the voltage level with high gain and second converter is used to split the DC supply for inverter convenience. In this paper, proposed RV symmetrical and asymmetrical MLI generates 7, 9, 11, 13 and 15 levels with only ten power switches. In-phase level-shifted triangular carrier type sine pulse width modulation (PWM) technique is employed to trigger the commutating switches of proposed RV MLI. Switches of H-Bridge for reverse voltage appearance across the load are triggered by simple pulse generator. The circuits are modeled and simulated in MATLAB/SIMULINK software. Results are presented and discussed.</p></td></tr></tbody></table>

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Mahdian, Hamidreza. "Improvement in the Synchronization Process of the Voltage-Sourced Converters Connected to the Grid by PLL in Order to Detect and Block the Double Frequency Disturbance Term." Indian Journal of Science and Technology 6, no. 7 (July 20, 2013): 1–13. http://dx.doi.org/10.17485/ijst/2013/v6i7.14.

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Netzahuatl, Edgardo, Domingo Cortes, Marco A. Ramirez-Salinas, Jorge Resa, Leobardo Hernandez, and Francisco-David Hernandez. "Modeling, Design Procedure and Control of a Low-Cost High-Gain Multi-Input Step-Up Converter." Electronics 8, no. 12 (November 29, 2019): 1424. http://dx.doi.org/10.3390/electronics8121424.

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The use of several different sources to feed a load jointly is convenient in many applications, in particular those where two or more renewable energy sources are employed. These applications include energy harvesting, hybrid vehicles, and off-grid systems. A multi-input converter able to admit sources of different characteristics and select the output power of each source is necessary in such applications. Several topologies of multi-input converters have been proposed to this aim; however, most of them are controlled by simple strategies based on a small signal model of multi-input converters. In this work, a low cost high gain step-up multi-input converter is analyzed. A nonlinear model is derived. Using this model, a detailed design procedure is proposed. A 500 W converter prototype was constructed to confirm that the model predicted the real behavior of the converter. Using the nonlinear model, indirect voltage control of basic converters was extended to the multi-input converter. The obtained controller had a fast performance, and it was robust under load and input voltage variations. With the obtained model, the proposed design procedure, and the controller, a converter that was initially proposed for photovoltaic applications was enabled to be used in a broader range of applications. The herein exposed ideas for modeling, the design procedure, and control could be also applied to other multi-input converters.

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Mitra, Lopamudra, and Ullash Kumar Rout. "Single Switched Non-isolated High Gain Converter." International Journal of Power Electronics and Drive Systems (IJPEDS) 8, no. 1 (March 1, 2017): 20. http://dx.doi.org/10.11591/ijpeds.v8.i1.pp20-30.

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<p>This paper presents a new single switched inductor- capacitor coupled transformer-less high gain DC-DC converter which can be used in renewable energy sources like PV, fuel cell in which the low DC output voltage is to be converted into high dc output voltage. With the varying low input voltages, the output of DC-DC converter remains same and does not change. A state space model of the converter is also presented in the paper. This constant output voltage is obtained by close loop control of converter using PID controller. High voltage gain of 10 is obtained without use of transformer. All the simulations are done in MATLAB-SIMULINK environment.</p>

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Senthilnathan, Karthikrajan, and K. Iyswarya Annapoorani. "A Review on Back-to-Back Converters in Permanent Magnet Synchronous Generator based Wind Energy Conversion System." Indonesian Journal of Electrical Engineering and Computer Science 2, no. 3 (June 1, 2016): 583. http://dx.doi.org/10.11591/ijeecs.v2.i3.pp583-591.

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This paper presents a review on the application of back-to-back converters in the field of Permanent Magnet Synchronous Generator (PMSG) based Wind Energy Conversion Systems (WECS). The wide applications of the back-to-back converters are power conditioning devices, micro grid, High Voltage Direct Current (HVDC), Renewable energy systems. The intention is to present an overview about the design considerations taken by various researchers in back-to-back converters in the field of Wind Energy Conversion Systems (WECS) and recent developments on it. Generally the configuration of back-to-back converters used are 12 pulse Voltage Source Converters (VSC), 12 pulse Current Source Converter (CSC), 9 Pulse Voltage Source Converter<em>.</em>

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Kumar, Rahul, Ramani Kannan, Nursyarizal Bin Mohd Nor, and Apel Mahmud. "A High Step-Up Switched Z-Source Converter (HS-SZC) with Minimal Components Count for Enhancing Voltage Gain." Electronics 10, no. 8 (April 13, 2021): 924. http://dx.doi.org/10.3390/electronics10080924.

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Some applications such as fuel cells or photovoltaic panels offer low output voltage, and it is essential to boost this voltage before connecting to the grid through an inverter. The Z-network converter can be used for the DC-DC conversion to enhance the output voltage of renewable energy sources. However, boosting capabilities of traditional Z-network boost converters are limited, and the utilization of higher parts count makes it bulky and expensive. In this paper, an efficient, high step-up, switched Z-source DC-DC boost converter (HS-SZC) is presented, which offers a higher boost factor at a smaller duty ratio and avoids the instability due to the saturation of inductors. In the proposed converter, the higher voltage gain is achieved by using one inductor and switch at the back end of the conventional Z-source DC-DC converter (ZSC). The idea is to utilize the output capacitor for filtering and charging and discharging loops. Moreover, the proposed converter offers a wider range of load capacity, thus minimizing the power losses and enhancing efficiency. This study simplifies the structure of conventional Z-source converters through the deployment of fewer components, and hence making it more cost-effective and highly efficient, compared to other DC-DC boost converters. Furthermore, a comparison based on the boosting capability and number of components is provided, and the performance of the proposed design is analyzed with non-ideal elements. Finally, simulation and experimental studies are carried out to evaluate and validate the performance of the proposed converter.

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Dehnavi, Saeed Daneshvar, and Ehsan Shayani. "Compensation of Voltage disturbances in hybrid AC/DC Microgrids using series converter." Ciência e Natura 37 (December 19, 2015): 349. http://dx.doi.org/10.5902/2179460x20794.

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In this paper a series power electronic converter is proposed to improve power quality of AC/DC hybrid microgrids. An injection transformer which is series with AC microgrid is used beside the series converter to inject voltage for the purpose of voltage disturbances compensation. The series converter by using a simple and effective control system in stationary reference framework of d-q-0 is proposed to compensate voltage sag and swell, source unbalanced voltages, voltage harmonics of the utility. In these types of micrigrids a lot of voltage disturbances have occurred due to large number of converters. Moreover, it is not required to use a storage energy system like battery; the required power is supplied by DC microgird, so the proposed system is very efficient. Simulation results in the MATLAB/Simulink environment have verified the appropriate performance of the proposed method.

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John, Malte, and Axel Mertens. "HARMONIC DOMAIN MODEL OF AN OPEN-LOOP CONTROLLED PWM CONVERTER." Informatyka Automatyka Pomiary w Gospodarce i Ochronie Środowiska 8, no. 2 (May 30, 2018): 25–29. http://dx.doi.org/10.5604/01.3001.0012.0699.

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An harmonic domain model is developed for open-loop controlled voltage source inverters, which provides the steady-state solution for integer multiples of the fundamental frequency. The convolution of the switching function spectrum with the converter currents and voltages is used to describe the coupling of the AC side and the DC side. The modeling is based on a single phase leg and is extended to a single-phase and a three-phase voltage source inverter, which results in a non-linear algebraic equation system. For open-loop control the switching function is independent of the converter currents and voltages and the model is simplified to a linear equation system. This straightforward and fast model is verified by time domain simulations and experimental results. The modeling can be adapted to systems of coupled converters, which is presented for a back-to-back converter system showing the harmonic interaction of the connected subsystems.

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Buswig, Y. M. Y., Wahyu Mulyo Utomo, Zainal Alam Haron, and S. S. Yi. "Multi-Input Boost Converter for Hybrid PV and Wind Generator Systems." Advanced Materials Research 925 (April 2014): 619–24. http://dx.doi.org/10.4028/www.scientific.net/amr.925.619.

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A renewable energy source that works alone can’t achieve customers’ requirements for a stable power supply. Therefore, the paper proposes a multi-input converter for hybrid renewable energy system. This converter is designed for two input sources, PV and wind generator in order to design high efficiency and high performance converters for renewable energy applications. The proposed multi-input converter is composed by interleaved technique with two step-up converters and the two inputs are accommodated with some extra semiconductors, inductances and diodes. The modes of operation based on the status of the four switches, where S1 and S2 operate as main switches in order to deliver energy from both voltage sources. A constant output power to the load is provided by switching S3 switch, which guarantied the appropriate output voltage by reduce the ripple and improve the reliability. Simulations of multi-input converter has been performed using MATLAB/SIMULINK. The simulation results confirm the validity of the proposed method, which can be seen as a promising new topology that ensure multi-input converter suitable for renewable energy applications.

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Lavanya, A., K. Vijaya Kumar, and J. Divya Navamani. "Topological Comparison of Dual-Input DC-DC Converters." International Journal of Power Electronics and Drive Systems (IJPEDS) 8, no. 2 (June 1, 2017): 804. http://dx.doi.org/10.11591/ijpeds.v8.i2.pp804-811.

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Dual input dc-dc converters have two input voltage sources or one input source and an energy storage system like ultra capacitor, PV, battery, super capacitors and a single output load. In order to process the power in hybrid energy systems using reduced part count, researchers have proposed several multi-input dc-dc power converter topologies to transfer power from different input voltage sources to the output. This paper compares non-isolated dual-input converter topologies topologically ,based on the components count, various fields of application and different modes of operation for hybrid systems mainly used in electric vehicles and renewable energy systems composed of energy storage systems (ESSs) with different voltage-current characteristics. Dual input dc-dc converter topologies considered in this paper are investigated using MATLAB and PSIM software and output voltage and inductor current waveforms are shown.

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Priya, E. Catherine Amala, and G. T. Sundar Rajan. "An improved model of hybrid multi converter used for grid connected applications." International Journal of Power Electronics and Drive Systems (IJPEDS) 10, no. 2 (June 1, 2019): 860. http://dx.doi.org/10.11591/ijpeds.v10.i2.pp860-867.

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A Hybrid multi converter topology is proposed in this paper, which supplies simultaneous voltage’s for various levels from Renewable energy source. The proposed topology is realized by replacing Multi cuk- buck converter topology. The resultant hybrid multi converter requires less number of switches to operate, as well as various output voltages of different levels without interruption with increased stability. This type of hybrid multi converter with high reliability and high stability are well implemented for loads utilizing various levels of DC voltage. Converter, proposed in this paper is called Hybrid Multi converter topology (HMCT). A study is made on the steady state of the HMCT and a comparative study has been made with the conventional designs. A PI controller based feedback controller is designed to stabilize the various output voltages. A simulated model for the proposed HMCT is used to simulate various output voltages of dissimilar values from mono DC- input. The performance of the converter is demonstrated using simulation model. The proposed design can be protracted to voltage source inverter, multilevel inverter to produce AC output.

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Babenko, V. P., and V. K. Bityukov. "Energy and noise characteristics of a SEPIC buck-boost converter with unipolar and bipolar output." Russian Technological Journal 9, no. 4 (August 26, 2021): 9–19. http://dx.doi.org/10.32362/2500-316x-2021-9-4-9-19.

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Some advantages of the SEPIC buck-boost converter makes it stand out from other configurations. It makes possible to obtain from a unipolar input voltage both unipolar and bipolar output voltage with a good symmetry between positive and negative output voltages. It also provides efficient performance as well as circuit simplicity in unipolar and bipolar topology owing to the use of a single switch which can be operated by available integrated controllers of boost converters. The article considers the topologies of a SEPIC buck-boost converter built according to the traditional scheme (with two inductors) and according to the scheme on magnetically coupled chokes. To analyze the processes and factors affecting the converter operation efficiency, a circuit simulation has been done using the Electronics Workbench. The results of the investigation of a pulsed DC converter of input voltage to unipolar or bipolar output voltage using SEPIC buck-boost topology are presented. The circuit simulation enables to specify the switching process characteristics, to estimate the ripple level of the input current and its spectral characteristics, and to develop recommendations concerning the choice of parameters of converters elements and generation of control signals. Based on the simulation results, the load, control, and noise characteristics of the converter are obtained. The level of symmetry of positive and negative output voltage is investigated for the converter on discrete and magnetically coupled chokes. The assessment of the effect of leakage inductance on converters with magnetic coupling of inductive elements is given. Examples of practical implementation of converters built according to the SEPIC topology are shown. It is found that the resistance of the choke windings, which is less than 0.5 Ohm, has practically no effect on the efficiency of the converter, retaining the factor of about 0.9 in a wide range of load currents, while the main source of conversion losses is a passive diode switch. Synchronous converter circuits of a number of manufacturers are more efficient, but require more complex controllers for active switches with elements for protection against through currents.

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Ado, Muhammad, Awang Jusoh, and Tole Sutikno. "Asymmetric quasi impedance source buck-boost converter." International Journal of Electrical and Computer Engineering (IJECE) 10, no. 2 (April 1, 2020): 2128. http://dx.doi.org/10.11591/ijece.v10i2.pp2128-2138.

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An impedance source buck-boost converter (BBC) prototype for renewable energy (RE) application in the transportation industry is proposed. Its functions include stabilizing the variable output voltage of the RE sources such as fuel cells and photovoltaic cells. The converter utilized a topology of DC-DC quasi-impedance source converters (q-ZSCs) to achieve the gain curve of the BBC. With BBC gain curve, the converter earned advantages over the two other classes of non-isolated DC-DC q-ZSCs. These advantages include ecient buck-boost capability at the ecient duty ratio range of 0:35-0:65 and continuous and non-zero gain at the ecient duty ratio range. The converter's q-ZSC topology implies using two capacitors and two inductors. These two capacitors and inductors formed two separate LC filters that provides second order filtering compared to the first order filtering in BBC. Its other advantages over the traditional BBC include elim-ination of dead and overlap-time, simple contol and permitting higher switching frequency operation. The converter is capable of utilizing high switching frequency and asymmetric components to achieve BBC gain by using smaller components to reduce cost, weight and size. Its simulation response and that of a correspond-ing BBC for some given specifications were compared, presented and analyzed. An experimental scaled-down prototype was also developed to confirm its opera-tion. Analysis of the converters responses comfirmed the prototype's second order filtering as against the first order filtering in traditional BBC.

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Ahmad, Javed, Mohammad Zaid, Adil Sarwar, Chang-Hua Lin, Mohammed Asim, Raj Kumar Yadav, Mohd Tariq, Kuntal Satpathi, and Basem Alamri. "A New High-Gain DC-DC Converter with Continuous Input Current for DC Microgrid Applications." Energies 14, no. 9 (May 4, 2021): 2629. http://dx.doi.org/10.3390/en14092629.

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The growth of renewable energy in the last two decades has led to the development of new power electronic converters. The DC microgrid can operate in standalone mode, or it can be grid-connected. A DC microgrid consists of various distributed generation (DG) units like solar PV arrays, fuel cells, ultracapacitors, and microturbines. The DC-DC converter plays an important role in boosting the output voltage in DC microgrids. DC-DC converters are needed to boost the output voltage so that a common voltage from different sources is available at the DC link. A conventional boost converter (CBC) suffers from the problem of limited voltage gain, and the stress across the switch is usually equal to the output voltage. The output from DG sources is low and requires high-gain boost converters to enhance the output voltage. In this paper, a new high-gain DC-DC converter with quadratic voltage gain and reduced voltage stress across switching devices was proposed. The proposed converter was an improvement over the CBC and quadratic boost converter (QBC). The converter utilized only two switched inductors, two capacitors, and two switches to achieve the gain. The converter was compared with other recently developed topologies in terms of stress, the number of passive components, and voltage stress across switching devices. The loss analysis also was done using the Piecewise Linear Electrical Circuit Simulation (PLCES). The experimental and theoretical analyses closely agreed with each other.

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Aleinikov, Edgard. "MINIMIZING LOSS IN VOLTAGE CONVERTERS AND DESIGNING A VOLTAGE CONVERTER BASED ON A HYBRID ARCHITECTURE." Mokslas - Lietuvos ateitis 12 (January 20, 2020): 1–5. http://dx.doi.org/10.3846/mla.2020.11470.

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There are several different architectures of voltage converters, that are widely used to change the source voltage of an electronic device. Each architecture has its advantages and disadvantages. The hybrid architecture has the major advantage because of the hybrid interconnection of two other architectures. After analyzing the different architectures and energy losses in converters we designed a hybrid architecture voltage converter and provided several solutions for increasing the efficiency of this voltage converter and reducing the cost of production.

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Kosenko, Roman, Liisa Liivik, Andrii Chub, and Oleksandr Velihorskyi. "Comparative Analysis of Semiconductor Power Losses of Galvanically Isolated Quasi-Z-Source and Full-Bridge Boost DC-DC Converters." Electrical, Control and Communication Engineering 8, no. 1 (July 1, 2015): 5–12. http://dx.doi.org/10.1515/ecce-2015-0001.

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Abstract This paper compares semiconductor losses of the galvanically isolated quasi-Z-source converter and full-bridge boost DC-DC converter with active clamping circuit. Operation principle of both converters is described. Short design guidelines are provided as well. Results of steady state analysis are used to calculate semiconductor power losses for both converters. Analytical expressions are derived for all types of semiconductor power losses present in these converters. The theoretical results were verified by means of numerical simulation performed in the PSIM simulation software. Its add-on module “Thermal module” was used to estimate semiconductor power losses using the datasheet parameters of the selected semiconductor devices. Results of calculations and simulation study were obtained for four operating points with different input voltage and constant input current to compare performance of the converters in renewable applications, like photovoltaic, where input voltage and power can vary significantly. Power loss breakdown is detailed and its dependence on the converter output power is analyzed. Recommendations are given for the use of the converter topologies in applications with low input voltage and relatively high input current.

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Sreedhar, Jadapalli, and B. Basavaraja. "Plan and analysis of synchronous buck converter for UPS application." International Journal of Engineering & Technology 7, no. 1.1 (December 21, 2017): 679. http://dx.doi.org/10.14419/ijet.v7i1.1.10827.

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DC-DC converters occupies very significant role in the field of industries or daily life applications. To charge batteries of low voltage connected to uninterrupted power supply (UPS), DC-DC converters are needed. Batteries requires low voltage and the available voltage at the source is to be step-down to the required level of voltage at the point of utility (PoU). While designing DC-DC converters, efficiency and simplicity of the circuit is very much important. Simply for the UPS applications, Buck converter can deliver the voltage at required level which is very simple in operation but the increased losses in diode can be addresses by using a synchronous Buck converter. By using synchronous Buck converter, the diode conduction losses in Buck converter can be minimized, thus improving the efficiency of the converter. In this paper, Synchronous Buck converter is used to charge the batteries of UPS. In this paper Design, modeling of synchronous Buck converter for UPS application was done and its results were obtained by using Matlab/Simulink. A hardware prototype was also developed and the hardware results were also shown.

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Journal articles on the topic 'Voltage sourced converters'

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