Articles de revues : « Three-phase current inverter »

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Xiong, Yu, Yu Ling Li, Yan Ping Guo et Bo Yang. « A Novel Three-Phase Current Source Active Power Filter ». Applied Mechanics and Materials 667 (octobre 2014) : 383–89. http://dx.doi.org/10.4028/www.scientific.net/amm.667.383.

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A novel topology for efficient utilization of parallel inverters as current source active power filter (APF) for high-power applications is presented and analyzed. The proposed technique operates the master inverter with high-power low-switching-frequency devices to compensate the low-order large-amplitude current harmonic components and the slave inverter with low-power high-switching-frequency devices to compensate the high-order small-amplitude current harmonic components. This paper discusses the operating principle, main circuit and control system design. Simulation and experimental results are provided to demonstrate the viability of the scheme.

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Kovačević, Haris, Lucijan Korošec et Miro Milanovič. « Single-Shunt Three-Phase Current Measurement for a Three-Level Inverter Using a Modified Space-Vector Modulation ». Electronics 10, n^o 14 (19 juillet 2021) : 1734. http://dx.doi.org/10.3390/electronics10141734.

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This article presents a single-shunt measurement of a three-level inverter using a modified space-vector modulation to reconstruct the three-phase load current. The proposed method was implemented on a digital signal processor (DSP), and the algorithm was verified in the laboratory experiment. Through the work, it was proven that the single-shunt three-phase current measurement could be performed using the space-vector modulation for three-level inverters in an analogous way to ordinary three-phase inverters. Three-phase current reconstruction for ordinary three-phase inverters was performed using the ordinary space-vector modulation with eight vectors, but for three-level inverters, 21 vectors were available. When the inverter was working on the edges between two vectors, the modulation disturbances appeared as current spikes. This problem was solved using the modified SVM performed by shifting the SVM signals. Carefully designed signal shifting (vector injection) demonstrated an excellent reconstruction of the three-phase load currents that were single-shunt measured.

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Yao, Zhi Lei, Lan Xiao et Jing Xu. « Performance Improvement of SVPWM-Based Three-Phase Grid-Connected Inverters ». Advanced Materials Research 732-733 (août 2013) : 1261–64. http://dx.doi.org/10.4028/www.scientific.net/amr.732-733.1261.

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An improved control strategy for three-phase grid-connected inverters with space vector pulse width modulation (SVPWM) is proposed. When the grid current contains harmonics, the d-and q-axes grid currents is interacted in the traditional control method, and the waveform quality of the grid current is poor. As the reference output voltage cannot directly reflect the change of the reference grid current with the traditional control strategy, the dynamic response of the grid-connected inverter is slow. In order to solve the aforementioned problems, the d-and q-axes grid currents in the decoupled components of the grid current controller are substituted by the d-and q-axes reference grid currents, respectively. The operating principles of the traditional and proposed control methods are illustrated. Experimental results show that the grid-connected inverter with the improved control strategy has high waveform quality of the grid current and fast dynamic response.

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Neukirchner, László, et Attila Magyar. « Modelling a Three-Phase Current Source Inverter ». Hungarian Journal of Industry and Chemistry 44, n^o 2 (1 décembre 2016) : 105–11. http://dx.doi.org/10.1515/hjic-2016-0013.

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Abstract A current source inverter model has been developed in the given paper that is constructed from six LTI models for the different switching modes. The overall model is in a piecewise affine form that supports the use of model predictive control. The model has been verified against engineering expectations and its open-loop performance shows that it is a promising basis of model predictive control structures.

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Alnamer, Saddam Shueai, Saad Mekhilef, Hazlie Mokhlis et Nadia M. L. Tan. « A Novel Multilevel DC-Link Three-Phase T-Type Inverter ». Energies 13, n^o 16 (13 août 2020) : 4186. http://dx.doi.org/10.3390/en13164186.

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This research proposes a four-level T-type inverter that is suitable for low-power applications. The presented topology outranks other types of inverters in terms of a smaller number of semiconductor devices, absence of passive components such as clamping diodes and flying capacitors, low switching and conduction losses, and high efficiency. The proposed topology is free from voltage deviation and unbalanced voltage occurrences that are present in other multilevel converters having clamping diodes or flying capacitors. The proposed inverter can extend to N levels using unequal dc-link voltage sources for medium-voltage application. The inverter employs the simple fundamental frequency staircase modulation technique. Moreover, this paper presents a current commutation strategy to prevent the occurrences of short circuit and minimizing the number of required switching devices and switching transitions, resulting in improving the efficiency of the inverter. This paper also analyses the theoretical converter losses showing lower switching and conduction losses when compared to existing four-level inverters. The experimental validation of the proposed inverter shows its operating feasibility and a low output voltage THD.

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Melo, Vinícius, Alexandre Melo, Walbermark Santos, Jussara Fardin et Lucas Encarnação. « Open-Loop Single-Phase Space State Model and Equivalent Circuit of a Non-Conventional Three-Phase Inverter ». Electronics 9, n^o 5 (30 avril 2020) : 744. http://dx.doi.org/10.3390/electronics9050744.

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Recently, many non-conventional three-phase inverters, topologies for green energy source grid-connection systems, and electric drives have been proposed. Simplifying the inverter circuit is crucial to analyze and solve their models in order to design them. The main goal of the study is centered on obtaining a single-phase equivalent circuit and space state model from non-conventional three-phase inverters based on bidirectional direct current–direct current (DC–DC) Buck-Boost topology using isolated gate bipolar transistors (IGBT). From just one phase of the three-phase inverter, the single-phase equivalent circuit was obtained by means of Kirchhoff’s laws. The equivalent circuit operation steps were presented in order to obtain the space state model. Finally, the equivalent circuit was simulated, and experimental results with a 200 W three-phase inverter feeding a resistive, inductive, and capacitive loads were performed to confirm the theoretical and simulation analyses. The results show the state space dynamic behavior variables of single-phase and three-phase models are quite similar. Therefore, it can be concluded that the proposed circuit can be used with property to represent equivalent single-phase models of non-conventional three-phase inverters.

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Kumar, B. S. A., et A. Mirbod. « A variable-voltage current-commutated three-phase inverter ». IEEE Transactions on Industry Applications 25, n^o 3 (1989) : 419–26. http://dx.doi.org/10.1109/28.31211.

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Kim, Jeongwoo, Yu Han, Shanshan Wang, Yihe Wang et Younghoon Cho. « A Current Reconstruction at Parallel Three Phase Inverters Using Two Current Sensors ». Electronics 8, n^o 2 (4 février 2019) : 179. http://dx.doi.org/10.3390/electronics8020179.

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In this paper, a current restoration method which can be applied to three phase parallel interleaved inverters (TPPII) using two current sensors has been proposed. In the proposed current reconstruction method, the branch current and the phase current of the two phases of the TPPII are sampled concurrently at the peak and valley of the pulse width modulation (PWM) carrier using two hall-effect sensors. Then, the phase current of each inverter is reconstructed by analyzing the sensed current with the current conduction path information according to the switch state in the peak and valley of the PWM carrier. This paper additionally analyzes the characteristics of the offset occurring in the detection process of two current sensors and it proposes a compensation method to reduce the offset on-line. In order to at once reduce the offset of the three-phase recovery current caused by the DC offset of the sensor, a coordinate conversion method and a low pass are used. To verify the performance of the proposed current recovery method and real-time offset compensation method, a simulation using PSIM software was performed, and experiments were conducted using a three phase parallel inverter composed of insulated gate bipolar transistor (IGBT) modules. In particular, the AC offset that occurred in the sampling process during the experiment was analyzed and modeled, and it was reduced by simple calculation.

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Dr. Sujatha Balaraman,, P. Yogini. « Three Phase Eleven Level Modular Multilevel Inverter with PD-PWM for Grid Connected System ». International Journal for Modern Trends in Science and Technology, n^o 8 (7 août 2020) : 86–91. http://dx.doi.org/10.46501/ijmtst060816.

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The prominence of Modular Multilevel Inverters (MMI) is rising owing their merits of simple mechanical construction and good voltage sharing for semiconductor devices. Mostly Multilevel Inverters use more than one source; however, the effective use of all the sources at all levels is rare. Conventional Multilevel Inverters will diminish the energy efficiency of the conversion system. When compared to conventional multilevel inverter, Modular Multilevel Inverter with a high numbers of voltage levels seem to be the most suitable because of the use of an isolated dc source. This paper explores a three-phase eleven level modular multilevel inverter with phase disposition pulse width modulation technique (PD-PWM) that can extract power from all the sources at all the levels. Besides, this paper develops a synchronous d-q reference frame controller to control the current of 11kV. When compared with Reduced Switch Count based Multilevel Inverter Series/Parallel switching topologies, the Modular Multilevel Inverter provides better Total Harmonic Distortion (THD) of output voltage and utilization factor.

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Wu, Kui Hua, Wei Sun, Jian Wang, Shen Quan Yang, Yi Qun Wang et Bo Li. « Design of the Three-Phase Photovoltaic Grid-Connected Inverter ». Advanced Materials Research 986-987 (juillet 2014) : 1938–41. http://dx.doi.org/10.4028/www.scientific.net/amr.986-987.1938.

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Photovoltaic grid-connected power generation is the inevitable development trend of solar photovoltaic systems,grid inverter is an essential part of photovoltaic grid-connected power generation. With the developed three phase current type PWM inverter device as the research object, and symmetry rules sampling method is applied to the inverter, through the method combined by the computer simulation and experiment research, the device was verified by simulation and experimental .The results show that: This method could not only effectively reduce the DC side inductance volume of the current-mode PWM inverter , and it could make output AC currents sinusoidal and in phase with grid voltages, but also improve the efficiency of the system, it will be more suitable for photovoltaic grid-connected.

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Madasamy, P., V. Suresh Kumar, P. Sanjeevikumar, Jens Bo Holm-Nielsen, Eklas Hosain et C. Bharatiraja. « A Three-Phase Transformerless T-Type- NPC-MLI for Grid Connected PV Systems with Common-Mode Leakage Current Mitigation ». Energies 12, n^o 12 (24 juin 2019) : 2434. http://dx.doi.org/10.3390/en12122434.

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DC to AC inverters are the well-known and improved in various kinds photovoltaic (PV) and gird tied systems. However, these inverters are require interfacing transformers to be synchronized with the grid-connected system. Therefore, the system is bulky and not economy. The transformerless inverter (TLI) topologies and its grid interface techniques are increasingly engrossed for the benefit of high efficiency, reliability, and low cost. The main concern in the TL inverters is common mode voltage (CMV), which causes the switching-frequency leakage current, grid interface concerns and exaggerates the EMI problems. The single-phase inverter two-level topologies are well developed with additional switches and components for eliminating the CMV. Multilevel inverters (MLIs) based grid connected transformerless inverter topology is being researched to avail additional benefits from MLI, even through that are trust topologies presented in the literature. With the above aim, this paper has proposed three -phase three-level T type NP-MLI (TNP-MLI) topology with transformerless PV grid connected proficiency. The CM leakage current should handle over mitigating CMV through removing unwanted switching events in the inverter pulse width modulation (PWM). This paper is proposes PV connected T type NP-MLI interface with three-phase grid connected system with the help of improved space vector modulation (SVM) technique to mitigate the CM leakage current to overcome the above said requests on the PV tied TL grid connected system. This proposed the SVM technique to mitigate the CM leakage current by selecting only mediums, and zero vectors with suitable current control method in order to maintain the inverter current and grid interface requirements. The proposed PV tied TNP-MLI offering higher efficiency, lower breakdown voltage on the devices, smaller THD of output voltage, good reliability, and long life span. The paper also investigated the CM leakage currents envisage and behavior for the three-phase MLI through the inverter switching function, which is not discussed before. The proposed SVM on TL-TNP-MLI offers the reliable PV grid interface with very low switching-frequency leakage current (200mA) for all the PV and inverter operation conditions. The feasibility and effectiveness of the TLI and its control strategy is confirmed through the MATLAB/Simulink simulation model directly as compared with 2kW roof top PV plant connected TL-TNP-MLI experimentation, showing good accordance with theoretical investigation. The simulation and experimental results are demonstrated and presented in the good stability of steady state and dynamics performances. The proposed inverter reduces the cost of grid interface transformer, harmonics filter, and CMV suppressions choke.

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Karam, K., M. Badawi El Najjar et M. El Hassan. « Three-Phase Transformerless Inverter for Photovoltaic Grid Connected System with Zero Common Mode Noise ». Renewable Energy and Power Quality Journal 19 (septembre 2021) : 137–42. http://dx.doi.org/10.24084/repqj19.239.

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The pervasion of transformerless grid connected photovoltaic (PV) inverters has triggered the concerns of many researchers since it can induce power quality problems. In these types of applications, the generation of common mode (CM) leakage current is one of the major factors that affects the reliability of the overall design. In single-phase systems, the concept of the common ground between the PV negative terminal and the neutral point of the grid is the only topology that “totally” cancels this CM noise. However, none of the existing three-phase inverter techniques is able to totally remove it. Therefore, this paper proposes a three-phase PV inverter based on the concept applied in the single-phase system in order to achieve, for the first time, a zero CM noise in three-phase grid-connected PV applications. The proposed inverter is simulated with a PV array, appropriate modulation technique, corresponding inverter controller, and a three-phase Y-connected alternating current (AC) grid voltage. The simulation of the overall system is done using Matlab/Simulink software. As compared with results of existing three-phase topologies, this is the only three-phase transformerless PV inverter technique that offers generation of multilevel output, total elimination of leakage current flow, simple inverter structure, and uncomplicated modulation technique.

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Zhang, Shao Ru, et Shao Yuan Li. « A Reference Compensation Current Control of Grid-Connected Inverter for Three-Phase Distributed Generators ». Applied Mechanics and Materials 433-435 (octobre 2013) : 1183–87. http://dx.doi.org/10.4028/www.scientific.net/amm.433-435.1183.

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Renewable energy resources (RES) are being increasingly connected in distribution systems by utilizing power electronic converters. However, the extensive use of power electronics has resulted in a rise in power quality (PQ) concerns faced by the utility. A novel control strategy implementing reference compensation current was proposed in this paper. So that these grid-connected inverters can achieve maximum benefits when they installed in 3-phase 4-wire distribution systems. The inverter is controlled to perform as a multi-function device by incorporating active power filter functionality. The inverter can thus be utilized as: 1) power converter to transfer active power from RES to the grid, and 2) load reactive power demand support; 3) current harmonics compensation at PCC; and 4) current unbalance and neutral current compensation in case of 3-phase 4-wire system. Moreover, with adequate control of grid-interfacing inverter, all the four objectives can be accomplished either individually or simultaneously. Simulation results show the validity and capability of the novel proposed control strategy.

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Chen, Guo Qiang, et Jun Jie Huang. « Simulation Analysis of Three-Phase Inverter DC Link Current ». Applied Mechanics and Materials 229-231 (novembre 2012) : 2015–18. http://dx.doi.org/10.4028/www.scientific.net/amm.229-231.2015.

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The DC link current spectrum has important effects on the active state and life of the battery cell and the bus capacitance in the three-phase inverter. Based on the load of PMSM (Permanent Magnet Synchronous Motor), the DC link current characteristics are presented intuitively using the computer simulation. The paper discusses the method and procedure to the simulation model that includes several key modules: PWM module, inverter module, and PMSM module. The simulating results are presented and analyzed.

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Choo, Kyoung-Min, Sung-Woo Hong, Young-Hee Jang, Il-Kuen Won, Do-Yun Kim et Chung-Yuen Wo. « Three Phase Current Reconstruction Method of Three Shunt Sensing 3-Phase Inverter by Predictive Current Technique ». Transactions of the Korean Institute of Power Electronics 22, n^o 2 (20 avril 2017) : 175–80. http://dx.doi.org/10.6113/tkpe.2017.22.2.175.

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Gai, Zhi Wu, Shi Sheng Yan et Ai Qi Wei. « Study of Three-Phase Full Bridge Spwm VSI ». Applied Mechanics and Materials 246-247 (décembre 2012) : 403–7. http://dx.doi.org/10.4028/www.scientific.net/amm.246-247.403.

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In order to reveals the dynamic, nonlinear work process of three-phase SPWM inverter, simulation model of three-phase full bridge voltage source SPWM inverter was built. Typical figure of voltage, current and spectrum was given and analyzed. Figures include line voltage of load, phase voltage of load, neutral point voltage of load, source current wave, Fourier analysis, Total Harmonic Distortion of voltage and current, inverter input impedance, line to line impedance. This Simulation model and results can be used as auxiliary in teaching, scientific research and product development. This simulation model was intuitive, commutative, being able to display graphs dynamically. Using this simulation model in class, the difficult in teaching three-phase full bridge SPWM inverter will be solved, it can also advance students’ studying interests and strengthen their understanding and save class hours. This simulation model has important value.

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Bao, Jian Yu, Wei Bing Bao et Zhong Chao Zhang. « A Generalized Three-Phase Multilevel Current-Source Inverter Topology ». Applied Mechanics and Materials 88-89 (août 2011) : 373–78. http://dx.doi.org/10.4028/www.scientific.net/amm.88-89.373.

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A generalized three-phase multilevel current-source inverter (MCSI) topology is proposed by implanting the generalized N-level current cells into a three-phase MCSI topology which is derived from the three-phase multilevel voltage-source inverter (MVSI) topology through dual conversion. In the generalized three-phase MCSI topology, each intermediate dc-link current level can be automatically balanced without adding any external circuits, thus a true multilevel structure is provided. Output current of each phase is independently modulated because of being supplied with two DC current-sources. This allows the wealth of existing knowledge relating to the operations, modulations and control strategies of multilevel VSI to be immediately applied to such multilevel CSI. Simulation results of 5-level and 7-level CSI systems are presented to verify the proposed three-phase MCSI topology.

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Fujita, Hideaki, et Hirofumi Akagi. « A Zero-Current-Switching Based Three-Phase PWM Inverter. » IEEJ Transactions on Industry Applications 114, n^o 5 (1994) : 561–66. http://dx.doi.org/10.1541/ieejias.114.561.

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Bao, Jian-yu, Zhi-hong Bai, Qing-song Wang et Zhong-chao Zhang. « A new three-phase 5-level current-source inverter ». Journal of Zhejiang University-SCIENCE A 7, n^o 12 (décembre 2006) : 1973–78. http://dx.doi.org/10.1631/jzus.2006.a1973.

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Zhang, Guozheng, Yuwei Wan, Zhixin Wang, Le Gao, Zhanqing Zhou et Qiang Geng. « Discontinuous Space Vector PWM Strategy for Three-Phase Three-Level Electric Vehicle Traction Inverter Fed Two-Phase Load ». World Electric Vehicle Journal 11, n^o 1 (14 mars 2020) : 27. http://dx.doi.org/10.3390/wevj11010027.

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Discontinuous pulse width modulation (DPWM) strategies are usually adopted to reduce the switching loss and output current ripple of three-phase three-level traction inverters under three-phase load conditions. However, if there is a short circuit in any arbitrary phase or the inverter is used to feed a two-phase load, the output performance of conventional DPWM strategies will be deteriorated. Here, four improved DPWM (IDPWM) strategies for three-phase three-level neutral-point-clamped (NPC) traction inverter fed two-phase load are proposed. Unlike three-phase load conditions, the phase angle and the amplitude of each basic voltage vector in the space vector diagram are modified under two-phase load conditions. Consequently, sectors are re-divided and duty cycles of basic vectors during synthesis are recalculated. Clamping intervals of each phase for the four type discontinuous PWM (DPWM) strategies are rearranged according to the modified space vector diagram; then, the proposed DPWM strategies can be obtained. Compared with the conventional DPWM strategies, the output current waveform quality of the proposed strategy is significantly improved. Meanwhile, the amplitude of the neutral-point voltage ripple is also reduced.

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Santos, Natália M. R., et V. Fernão Pires. « Three-phase STATCOM based on a single-phase current source inverter ». Energy Procedia 14 (2012) : 2102–7. http://dx.doi.org/10.1016/j.egypro.2011.12.1214.

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Meraj, Sheikh Tanzim, Nor Zaihar Yahaya, Kamrul Hasan, Molla Shahadat Hossain Lipu, Ammar Masaoud, Sawal Hamid Md Ali, Aini Hussain, Muhammad Murtadha Othman et Farhan Mumtaz. « Three-Phase Six-Level Multilevel Voltage Source Inverter : Modeling and Experimental Validation ». Micromachines 12, n^o 9 (21 septembre 2021) : 1133. http://dx.doi.org/10.3390/mi12091133.

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This research proposes a three-phase six-level multilevel inverter depending on twelve-switch three-phase Bridge and multilevel DC-link. The proposed architecture increases the number of voltage levels with less power components than conventional inverters such as the flying capacitor, cascaded H-bridge, diode-clamped and other recently established multilevel inverter topologies. The multilevel DC-link circuit is constructed by connecting three distinct DC voltage supplies, such as single DC supply, half-bridge and full-bridge cells. The purpose of both full-bridge and half-bridge cells is to provide a variable DC voltage with a common voltage step to the three-phase bridge’s mid-point. A vector modulation technique is also employed to achieve the desired output voltage waveforms. The proposed inverter can operate as a six-level or two-level inverter, depending on the magnitude of the modulation indexes. To guarantee the feasibility of the proposed configuration, the proposed inverter’s prototype is developed, and the experimental results are provided. The proposed inverter showed good performance with high efficiency of 97.59% following the IEEE 1547 standard. The current harmonics of the proposed inverter was also minimized to only 5.8%.

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KJ, Sinu, et G. Ranganathan. « A PV FED Three Phase Switched Z-source Multi Level Inverter for Induction Motor Drives ». Indonesian Journal of Electrical Engineering and Computer Science 9, n^o 1 (1 janvier 2018) : 24. http://dx.doi.org/10.11591/ijeecs.v9.i1.pp24-28.

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Generally induction motor drives posses higher harmonic contents in line voltage and current due to high switching frequency used in inverters. Conventional induction motor drives employ two level voltage source inverters which has THD in level of 50%. This paper presents a switched z-source multilevel inverter which has voltage boosting capability and has lesser THD level in comparison with conventional two level voltage source inverters. This drive is fed from a photo voltaic source because of its voltage boosting capability. A single phase five level switched z-source inverter is initially designed and considered as single cell and three such cells are created for powering three phase induction motor. The proposed three cell PV source switched z-source multilevel inverter for three phase induction motor is simulated in MATLAB/Simulink software to verify merits of proposed IM drive

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Cao, Wei, Jing Sun, Hu Su et Dao Pei Yang. « The Design and Research of Three-Phase Inverter Dual-Loop Control ». Applied Mechanics and Materials 672-674 (octobre 2014) : 961–67. http://dx.doi.org/10.4028/www.scientific.net/amm.672-674.961.

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A dual-loop (inner current loop and outer voltage loop) control scheme for micro electric source inverters in microgrid is improved in this paper. In order to make dual-loop control analysis more accurate, LC filter, SVPWM module equivalent are included in the inverter supplied system model. Based on the fully decoupled dq axis model,the PI controller are used in both inner current loop and outer voltage loop. The inner current loop is designed with engineering algorithm and the outer voltage loop with bode diagram and step response. The simulation results show the validity of the designed control in that the proposed design methodology not only enhances steady state performance of the system, improves the voltage quality but also enables the current limiting.

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Qi, Chun Qing, Yi Ruan et Feng Wen Cao. « Research on Control Strategy for the Three-Phase Grid-Connected Inverter ». Advanced Materials Research 614-615 (décembre 2012) : 1578–82. http://dx.doi.org/10.4028/www.scientific.net/amr.614-615.1578.

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This paper proposes a control strategy，based on the grid voltage oriented vector control (VOC), which makes three-phase inverter control the active and reactive power of grid-connected inverter under the premise of the direct current control. This paper analyzes the principle of three phase photovoltaic grid connected inverter and describes the control structure of the inverter. The control strategy can overcome the deficiencies of the indirect current control scheme. This paper designs the current closed-loop control system, which not only improve the system dynamic response speed and output current waveform quality, while also reduce its sensitivity to parameter changes to improve the robustness of the system. The simulation results show the validity of control strategy proposed.

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Abed, Jameel Kaduim. « A three phase photovoltaic grid tied inverter system control based on t-s fuzzy equalization ». International Journal of Power Electronics and Drive Systems (IJPEDS) 10, n^o 2 (1 juin 2019) : 928. http://dx.doi.org/10.11591/ijpeds.v10.i2.pp928-934.

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This paper proposed a Takagi-Sugeno fuzzy control method is used to build the model for current controlled of three phase photovoltaic inverter. The three phase inverter connected to grid with L filter. The DC link capacitor is splatted midpoint of three phase four wire and the DC link voltage in the input side of the inverter is considered as input variables value for maximum value of the reference current for the feedback controlled. The proposed of T-S fuzzy control method and hysteresis current control can solve and enhance the THD of the output current of the inverter. The T-S fuzzy is designed to monochrome controller makes the output currents are balanced and decrease the harmonic compensation of the full system. The Matlab simulations and test results show the THD, current and the voltage of the three photovoltaic inverter under T-S fuzzy controller method is current balancing efficiency. The control unit is capable of carrying out operation in good condition, dynamic characteristics stable and high quality.

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Kim, Jae-Chang, et Sang-Shin Kwak. « Frequency-Domain Characteristics of Series DC Arcs in Photovoltaic Systems with Voltage-Source Inverters ». Applied Sciences 10, n^o 22 (13 novembre 2020) : 8042. http://dx.doi.org/10.3390/app10228042.

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In this study, the frequency characteristics of series DC arcs are analyzed according to the types of frequency fluctuations caused by inverters in photovoltaic (PV) systems. These frequency fluctuation types used in analysis include centralized frequency fluctuations by three-phase inverter, spread frequency fluctuations by three-phase inverter, and centralized frequency fluctuations by single-phase inverter. To collect arc current data, the frequency fluctuations are generated by inverters in the arc-generating circuit, designed by referring to UL1699B, and the arcs are generated by separating the arc rods of the arc generator. The frequency analysis of the arc current data, collected using an oscilloscope, is conducted using MATLAB. From the results of the frequency characteristics analysis, it is confirmed that the frequencies in the range from 5 to 40 kHz increase after arc generation regardless of the type of frequency fluctuation. In addition, the smaller the current, the greater the increase in frequencies between 5 and 40 kHz after arc generation. Further, in case of arc currents with centralized frequency fluctuations, for larger switching frequencies, the 5 to 40 kHz components increase to a greater extent after arcing.

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Cai, Hui, Hong Yan, Wei Min Chen et Qing Li. « Design of a Balanced Three-Phase Power Supply Soft-Switching Based on Single-Phase Inverter Power ». Applied Mechanics and Materials 263-266 (décembre 2012) : 803–8. http://dx.doi.org/10.4028/www.scientific.net/amm.263-266.803.

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To eliminate the negative effects caused by three-phase unbalanced distribution, a novel soft-switching system based on single-phase inverter is proposed. The system achieves three-phase equilibrium distribution by adjusting the power supply of the electric equipments. This paper presents a track strategy named regulating frequency to promise no impulse current, which means regulating the output frequency of the inverter to make the output voltage of the inverter synchronize with the grid voltage. Firstly, make the output voltage of the inverter synchronize with the voltage of original access phase, then switch the electric equipment to the inverter. Secondly, make the output voltage of the inverter synchronize with the voltage of alternative access phase, then switch the electric equipment to the alternative access phase to accomplish the soft-switching. MATLAB software and experiment are used to carry out verification for this system. The result shows that the impulse current is practically zero when the electric equipments are switching. The system achieves soft-switching.

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Zhafarina, M., M. Irwanto, A. H. Haziah, N. Gomesh, Y. M. Irwan, M. R. Mamat et M. Fareq. « Simulation of Three Levels Single Phase Inverter Using Proteus Software ». Applied Mechanics and Materials 793 (septembre 2015) : 315–19. http://dx.doi.org/10.4028/www.scientific.net/amm.793.315.

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Photovoltaic is use to supply electricity from sunlight. Inverter is used to convert the direct current (DC) from photovoltaic to alternating current (AC). This project is to design and develop a single phase inverter that able to invert the input voltage of DC to output voltage of AC using PROTEUS software. The inverter based on 8 bits for one cycle of a driver pulse wave. This simulation used before doing the hardware. This software can save a lot of time on this exact simulation of the prototype.

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Li, Y. P., F. C. Lee et D. Boroyevich. « A simplified three-phase zero-current-transition inverter with three auxiliary switches ». IEEE Transactions on Power Electronics 18, n^o 3 (mai 2003) : 802–13. http://dx.doi.org/10.1109/tpel.2003.810850.

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Naderipour, Amirreza, Zulkurnain Abdul-Malek, Vigna K. Ramachandaramurthy et Josep M. Guerrero. « Control Method for Three-Phase Grid-Connected Inverter PV System Employing Unity Power Factor (UPF) Strategy in Microgrid ». E3S Web of Conferences 115 (2019) : 01006. http://dx.doi.org/10.1051/e3sconf/201911501006.

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Microgrids (MGs) are developing owing to the rapidly growing distributed power generation systems. The MG controls the flexibility of the network to ensure the requirements of reliability and power quality are satisfied. A typical MG normally consists of dispersed generation resources, which are connected by power electronic inverters, storages, and non-linear loads. This study deals with a compensation control method of a photovoltaic grid-connected inverter using unity power factor (UPF) strategy in MG. In this case, the proposed control method can provide output currents without distortion and with the UPF. Further, it is able to increase the inverter output current to approximately 19 times of the value obtained conventionally. The proposed control method can be applied to three-phase grid interfaced converters such as DG inverters and can also be easily integrated into the conventional control scheme without installation of extra hardware. A theoretical analysis is presented and the performance of the proposed control method for a grid-connected inverter in a MG is evaluated through simulation results.

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Quan, Xiangjun, Zaijun Wu, Xiaobo Dou, Minqiang Hu et Alex Q. Huang. « Load Current Decoupling Based LQ Control for Three-Phase Inverter ». IEEE Transactions on Power Electronics 33, n^o 6 (juin 2018) : 5476–91. http://dx.doi.org/10.1109/tpel.2017.2738021.

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Tilli, A., et A. Tonielli. « Sequential design of hysteresis current controller for three-phase inverter ». IEEE Transactions on Industrial Electronics 45, n^o 5 (1998) : 771–81. http://dx.doi.org/10.1109/41.720334.

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Ahmed, K. H., A. M. Massoud, S. J. Finney et B. W. Williams. « Sensorless Current Control of Three-Phase Inverter-Based Distributed Generation ». IEEE Transactions on Power Delivery 24, n^o 2 (avril 2009) : 919–29. http://dx.doi.org/10.1109/tpwrd.2009.2014488.

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Ma, Haixiao, Zhaixing Lan et Zefeng Chen. « Non-isolated H10 three-phase inverter for leakage current suppression ». Journal of Power Electronics 20, n^o 5 (15 juillet 2020) : 1139–48. http://dx.doi.org/10.1007/s43236-020-00121-8.

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Akbar, Fazal, Honnyong Cha et Duc-Tuan Do. « CSI7 : Novel Three-Phase Current-Source Inverter With Improved Reliability ». IEEE Transactions on Power Electronics 36, n^o 8 (août 2021) : 9170–82. http://dx.doi.org/10.1109/tpel.2021.3053132.

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Pires, Vitor Fernão, Joaquim Monteiro, Armando Cordeiro et José Fernando Silva. « Integrated Battery Charger for Electric Vehicles Based on a Dual-Inverter Drive and a Three-Phase Current Rectifier ». Electronics 8, n^o 10 (22 octobre 2019) : 1199. http://dx.doi.org/10.3390/electronics8101199.

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This paper presents a new three-phase battery charger integrated with the propulsion system of an electric vehicle. The propulsion system consists of a dual-inverter topology connected to an induction motor via open windings. The electrical vehicles (EV) batteries are divided by two inverters. This will result in a drive with multilevel characteristics reducing the total harmonic distortion (THD) of the voltage applied to the motor. The modularity of the multilevel inverter will be maintained since two classical three-phase inverters are used. The charger will be fed by a three-phase high power factor current source rectifier. The motor windings will take the role of the DC-inductor required by the rectifier. In this way, an intermediate storage element between the grid and the batteries of the vehicle exist. For the control system of the battery charger, we propose the use of the instantaneous power theory and a sliding mode controller for the three-phase charger input currents. Finally, to verify the behavior and characteristics of the proposed integrated battery charger and control system, several tests are be presented.

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Et.al, Anshu Sharma. « Designing of Three Level 3 Phase Inverter Using Improved SPWM Modulation for different Loads ». Turkish Journal of Computer and Mathematics Education (TURCOMAT) 12, n^o 3 (10 avril 2021) : 4513–20. http://dx.doi.org/10.17762/turcomat.v12i3.1840.

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Many high voltage applications require three-phase inverters. The major challenge in inverter designing is the mitigation of harmonic distortion (HD) to achieve better inverting performance. Usually, sinusoidal pulse width modulation (SPWM) is widely used to trigger the inverting switches for controlling the total HD performance in the inverter. To provide the option of multiple operating ranges the multilevel inverters are designed for higher voltage operations. This paper contributes in two passes, first, an improved SPWM modulation is generated for designing the three levels inverter. Then in the second pass, the performance of the THD is evaluated under the different load conditions using V-I measurement. THD is present in the system due to the use of switches. Therefore, this paper has evaluated the performance of the proposed improved SPWM based multilevel inverter for analysis. In order to improve the performance, the modulation index of the SPWM block is varied. The performance of the component report is also presented in the short..the output waveform of the line current and the voltage are compared; The FFT analysis is done to evaluate the comparison of THD performance. It is concluded that improving the SPWM performance and the lording conditions may improve the THD performance also.

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Tang, Wu Wu, Liang Liang Chen, Hong Xu Yin et Hao Dong. « Design and Implementation of 30kW Three-Phase PV Grid-Connected Inverter ». Applied Mechanics and Materials 241-244 (décembre 2012) : 636–40. http://dx.doi.org/10.4028/www.scientific.net/amm.241-244.636.

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This paper developed a mathematical model of three-phase PV grid-connected inverter, and studied the grid-connected current control method based on PI control in synchronous rotating reference frame. Simulation and experimental results from the prototype of 30kW three-phase PV grid-connected inverter proved the correctness and the feasibility of the control strategy, and this grid-connected inverter can operate at the unity power factor state with a nice dynamic performance, and the output current has high sinusoidal and low harmonic content as well as good symmetry.

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Shadab, Mirza Mohammad, Mohammad Arifuddin Mallick, Mohammad Tufail et M. S. Jamil Asghar. « Development of a Novel Three Phase Grid-Tied Multilevel Inverter Topology ». International Journal of Power Electronics and Drive Systems (IJPEDS) 7, n^o 3 (1 septembre 2016) : 826. http://dx.doi.org/10.11591/ijpeds.v7.i3.pp826-834.

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The conventional line-commutated ac-to-dc converters/ inverters have square-shaped line current. It contains higher-order harmonics which generates EMI and it causes more heating of the core of distribution or power transformers. PWM based inverters using MOSFET/IGBT have higher switching losses, and the power handling capability and reliability are quite low in comparison to thyristors/ SCR. A thyristor based forced commutated inverters are not suitable for PWM applications due to the problems of commutation circuits. A pure sinusoidal voltage output or waveform with low harmonic contents is most desirable for ac load using dc to ac conversion. This paper presents a new multilevel inverter topology in which three phase ac- to-dc converter circuits are used in inversion mode by controlling the switching angle. Due to natural commutation, no separate circuit is required for synchronization. In this paper simulation and analysis are done for grid-tied three-phase 6-pulse, Two three-phase, 3-pulse and 12-pulse converter. These converters are analysed for different battery voltage and different switching angle combinations in order to reduce the total harmonic distortion (THD). Three-phase harmonic filters are further added to the grid side to reduce the harmonic content in the line current. A comparative study of these converters is also presented in this paper.

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Abdallah, Boucetta Abdou, et Labed Djamel. « Control of power and voltage of solar grid connected ». International Journal of Electrical and Computer Engineering (IJECE) 6, n^o 1 (1 février 2016) : 26. http://dx.doi.org/10.11591/ijece.v6i1.8632.

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Renewable energy is high on international agendas. Currently, grid-connected photovoltaic systems are a popular technology to convert solar energy into electricity. Control of power injected into the grid, maximum power point, high efficiency, and low total harmonic distortion of the currents injected into the grid are the requirements for inverter connection into the grid. Consequently, the performance of the inverters connected to the grid depends largely on the control strategy applied. In this paper the simulation and design of grid connected three phase photovoltaic system using Matlab/Simulink has examined. The proposed system consists photovoltaic panels, boost and inverter the PV system convert the sun irradiation into direct current, thereafter we have used a boost to track the maximum power point of the PV system, three-phase inverter and LC output filter. A VOC control strategy based on the phase shifting of the inverter output voltage with respect to the grid voltage. The proposed control strategy requires few hardware and computational resources. As a result, the inverter implementation is simple, and it becomes an attractive solution for low power grid connected applications.

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Abd Allah, Boucetta, et Labed Djamel. « Control of Power and Voltage of Solar Grid Connected ». International Journal of Electrical and Computer Engineering (IJECE) 6, n^o 1 (1 février 2016) : 26. http://dx.doi.org/10.11591/ijece.v6i1.pp26-33.

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Renewable energy is high on international agendas. Currently, grid-connected photovoltaic systems are a popular technology to convert solar energy into electricity. Control of power injected into the grid, maximum power point, high efficiency, and low total harmonic distortion of the currents injected into the grid are the requirements for inverter connection into the grid. Consequently, the performance of the inverters connected to the grid depends largely on the control strategy applied. In this paper the simulation and design of grid connected three phase photovoltaic system using Matlab/Simulink has examined. The proposed system consists photovoltaic panels, boost and inverter the PV system convert the sun irradiation into direct current, thereafter we have used a boost to track the maximum power point of the PV system, three-phase inverter and LC output filter. A VOC control strategy based on the phase shifting of the inverter output voltage with respect to the grid voltage. The proposed control strategy requires few hardware and computational resources. As a result, the inverter implementation is simple, and it becomes an attractive solution for low power grid connected applications.

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Sahoo, N. C., R. Vejian et R. Gobbi. « Using PSpice for Teaching Output Current Control in D.C.-A.C. Inverters to Undergraduate Students ». International Journal of Electrical Engineering & ; Education 45, n^o 4 (octobre 2008) : 356–70. http://dx.doi.org/10.7227/ijeee.45.4.8.

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In the present day technology of power semiconductor drives, d.c.-a.c. switch-mode voltage source inverters are widely used in a.c. motor servo drives. In these applications, the motor phase currents need to be controlled for high performance. Thus, the prime control issue is to obtain the switching signals for the inverter switches in order to control/regulate the inverter output current. There are various standard ways to derive the switching signals for the inverter. Undergraduate students of electrical engineering should know these basics and get hands-on experience of the inverter current control techniques while taking a course on Power Electronics and Drives. This paper discusses an efficient way of teaching current control in d.c.-a.c. voltage source inverters by computer simulation studies using the student version of PSpice (Release 9.1). Three standard methods have been demonstrated, i.e., triangular carrier method, hysteresis band method, and periodic sampling method. This paper can be used by students for self-study as well as by instructors for simulation-based laboratory experiments.

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Mohammad Noor, S. Z., N. Rosmizi, N. Aminudin et Faranadia A.H. « Investigation of Passive Filter Performance on Three Phase DC to AC Converter ». International Journal of Power Electronics and Drive Systems (IJPEDS) 9, n^o 3 (1 septembre 2018) : 1016. http://dx.doi.org/10.11591/ijpeds.v9.i3.pp1016-1028.

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This work presents investigation of passive filter performance on three-phase inverter with 180° conduction mode. The simulation model of the inverter is developed by using MATLAB/Simulink. The power circuit used Insulated Gate Bipolar Transistor (IGBT) as switching device. The inverter is controlled by using bipolar Sinusoidal Pulse Width Modulation (SPWM) technique. The IGBT was set to 25 kHz for switching frequency (fs). Three types of passive filters which are LC, RC and PI filters are used to investigate the ability to remove the unwanted signal that occurred on the inverter. The result is analyzed based on the performances of output filter in term of Total Harmonic Distortion in voltage (THDv), current (THDi), shape of output voltage and current. The THD must be less than 5% at rated inverter output voltage or current by referring to IEC 61727 Standard. The passive filter is modeled in MATLAB/Simulink environment to study the characteristics and performance of the filters.

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Grgić, Ivan, Dinko Vukadinović, Mateo Bašić et Matija Bubalo. « Calculation of Semiconductor Power Losses of a Three-Phase Quasi-Z-Source Inverter ». Electronics 9, n^o 10 (6 octobre 2020) : 1642. http://dx.doi.org/10.3390/electronics9101642.

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This paper presents two novel algorithms for the calculation of semiconductor losses of a three-phase quasi-Z-source inverter (qZSI). The conduction and switching losses are calculated based on the output current-voltage characteristics and switching characteristics, respectively, which are provided by the semiconductor device manufacturer. The considered inverter has been operated in a stand-alone operation mode, whereby the sinusoidal pulse width modulation (SPWM) with injected 3rd harmonic has been implemented. The proposed algorithms calculate the losses of the insulated gate bipolar transistors (IGBTs) and the free-wheeling diodes in the inverter bridge, as well as the losses of the impedance network diode. The first considered algorithm requires the mean value of the inverter input voltage, the mean value of the impedance network inductor current, the peak value of the phase current, the modulation index, the duty cycle, and the phase angle between the fundamental output phase current and voltage. Its implementation is feasible only for the Z-source-related topologies with the SPWM. The second considered algorithm requires the instantaneous values of the inverter input voltage, the impedance network diode current, the impedance network inductor current, the phase current, and the duty cycle. However, it does not impose any limitations regarding the inverter topology or switching modulation strategy. The semiconductor losses calculated by the proposed algorithms were compared with the experimentally determined losses. Based on the comparison, the correction factor for the IGBT switching energies was determined so the errors of both the algorithms were reduced to less than 12%.

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N, Prakash, et Balaji V.R. « Three phase voltage source inverters with grid connected industrial application ». International Journal of Engineering & ; Technology 7, n^o 4 (16 avril 2018) : 18. http://dx.doi.org/10.14419/ijet.v7i2.9.9653.

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The grid-connected issue is one of the major problems in the field of Power Electronics. In this paper, the Three Phase Voltage Source Inverter (VSI) is controlled by a Space Vector Pulse Width Modulation (SVPWM) Technique. SVPWM control technique and Park transformation, the managed inverter control system to convert input DC power into AC power, stabilize the output voltage and current, and feeds the excess power to the utility grid can be achieved by controllers. Usually, the grid source contains higher level of harmonics. To analyze the harmonics, nonlinear load is connected externally in the point of common coupling. The main aim of this paper is to modeling, simulation and experimental study of the three-phase grid connected inverter. By using the control algorithm, the grid sides Total Harmonics Distortion (THD) are controlled to the 1.54% for 800V DC as per the IEEE standard. The stimulation results such as AC output voltage and current, inverter system power flow, and grid disturbances detection signals, proves the effectiveness of the developed control algorithm. The control algorithms to makes the for this inverter outputs is pure sinusoidal.

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Swamy, D. Manikanta, M. Venkatesan et M. Subbarao. « Investigations on Three-phase Grid-Connected Inverter using PWM Controllers ». Journal of Engineering Science and Technology Review 13, n^o 5 (2020) : 176–82. http://dx.doi.org/10.25103/jestr.135.23.

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In recent years, a Multilevel Inverter (MLI) topology is highly preferred in the various renewable energy applications for converting power due to their merits. In this paper, a three-phase inverter has been designed for grid-connected applications using Proportional Integral (PI) current controller scheme. To generate a sequence, the Level shift (LS) and Phase Shift (PS) Pulse Width Modulation (PWM) methodologies are adapted. This topology has been designed with two stages: the DC-DC conversion stage and DC-AC conversion stage. The DC-DC conversion stage is used to enrich input DC voltage which is obtained from the solar PV array. The PI current controller has been designed to regulate the grid current with park transformation. The performances of the inverter have been examined in terms of Total Harmonic Distortion (THD) using different PWM techniques and also investigated with existing research works. The developed results are verified using MATLAB/ Simulink.

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Wu, Yi Feng, Zhi Quan Deng et Yu Wang. « Direct Slip Linear Control of Three-Phase Induction Motor with One Phase Open-Circuit Fault Based on Three-Level Inverter ». Advanced Materials Research 433-440 (janvier 2012) : 6776–82. http://dx.doi.org/10.4028/www.scientific.net/amr.433-440.6776.

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In order to realize high power and reliability of speed control system, fault-tolerant induction motor control system based on three-level inverter is studied in this paper. Based on three-level inverter, a fault-tolerant inverter topology with an extra leg providing the current path during the post-fault operation is proposed. A corresponding control strategy is investigated to avoid voltage drift of the dc link midpoint. In this paper, an induction motor direct slip linear control (DSLC) is employed and investigated to reduce torque ripple and flux magnitude deviation in three-level system. Both simulation and experimental system have been set up to verify the effectiveness of the proposed control strategy.

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Chebabhi, Ali, Mohammed-Karim Fellah, Mohamed-Fouad Benkhoris et Abdelhalim Kessal. « Sliding mode controller for four leg shunt active power filter to eliminating zero sequence current, compensating harmonics and reactive power with fixed switching frequency ». Serbian Journal of Electrical Engineering 12, n^o 2 (2015) : 205–18. http://dx.doi.org/10.2298/sjee1502205c.

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In this paper, the four leg inverter controlled by the three dimensional space vector modulation (3D SVM) is used as the shunt active power filter (SAPF) for compensating the three phase four wire electrical network, by using the four leg inverter with 3D SVM advantages to eliminated zero sequence current, fixed switching frequency of inverter switches, and reduced switching losses. This four leg inverter is employed as shunt active power filter to minimizing harmonic currents, reducing magnitude of neutral wire current, eliminating zero sequence current caused by nonlinear single phase loads and compensating reactive power, and a nonlinear sliding mode control technique (SMC) is proposed for harmonic currents and DC bus voltage control to improve the performances of the three phase four wire four leg shunt active power filter based on Synchronous Reference Frame (SRF) theory in the dq0 axes, and to decoupling the four leg SAPF mathematical model.

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Hossameldin, Abdelsalam, Ibrahim et Williams. « Enhanced Performance Modified Discontinuous PWM Technique for Three-Phase Z-Source Inverter ». Energies 13, n^o 3 (26 janvier 2020) : 578. http://dx.doi.org/10.3390/en13030578.

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Various industrial applications require a voltage conversion stage from DC to AC. Among them, commercial renewable energy systems (RES) need a voltage buck and/or boost stage for islanded/grid connected operation. Despite the excellent performance offered by conventional two-stage converter systems (dc–dc followed by dc–ac stages), the need for a single-stage conversion stage is attracting more interest for cost and size reduction reasons. Although voltage source inverters (VSIs) are voltage buck-only converters, single stage current source inverters (CSIs) can offer voltage boost features, although at the penalty of using a large DC-link inductor. Boost inverters are a good candidate with the demerit of complicated control strategies. The impedance source (Z-source) inverter is a high-performance competitor as it offers voltage buck/boost in addition to a reduced passive component size. Several pulse width modulation (PWM) techniques have been presented in the literature for three-phase Z-source inverters. Various common drawbacks are annotated, especially the non-linear behavior at low modulation indices and the famous trade-off between the operating range and the converter switches’ voltage stress. In this paper, a modified discontinuous PWM technique is proposed for a three-phase z-source inverter offering: (i) smooth voltage gain variation, (ii) a wide operating range, (iii) reduced voltage stress, and (iv) improved total harmonic distortion (THD). Simulation, in addition to experimental results at various operating conditions, validated the proposed PWM technique’s superior performance compared to the conventional PWM techniques.

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