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Journal articles on the topic 'Line-commutated inverters'

Author: Grafiati

Published: 4 June 2021

Last updated: 4 February 2022

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1

Shadab, Mirza Mohammad, Mohammad Arifuddin Mallick, Mohammad Tufail, and 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, no. 3 (September 1, 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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2

Brighenti, Lucas, Alessandro Batschauer, and Marcello Mezaroba. "Line-commutated Inverters Associated To A Multi-pulse Autotransformer To Photovoltaic Generation." Eletrônica de Potência 21, no. 3 (September 1, 2016): 200–211. http://dx.doi.org/10.18618/rep.2016.3.2602.

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3

Oni, Oluwafemi E., Andrew G. Swanson, and Rudiren Pillay Carpanen. "Line Commutated Converter Response during Total and Partial De-Blocking of a Bipolar MTDC System." International Journal of Engineering Research in Africa 52 (January 2021): 49–61. http://dx.doi.org/10.4028/www.scientific.net/jera.52.49.

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This paper focuses on the fault blocking analysis and operational issues associated with MTDC systems incorporated in an AC network. The dynamic modelling of a line-commutated converter based bipolar multi-terminal direct current (LCC MTDC) system are shown, and the dynamic response of the converter during a DC converter fault is discussed. The converter controller design for both rectifiers and the inverters system was modelled for a realistic active power and extinction angle (γ) control with consideration to the VI characteristics of all the converter stations. An overall power controller was modelled for both converter pole. Two operational scenarios of converter fault were simulated using PSCAD EMTDC. The converter firing angle and extinction angle, as well as the voltage-dependent current order limiter, was monitored and plotted on a graph. Results show that the MTDC link became unstable during the full deblocking stage with a continuous occurrence of commutation failure. Furthermore, the results presented in this paper show that during partial converter de-blocking showed a favourable performance, as the power system remains stable and commutation failure of the MTDC system is prevented.

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4

He, Xiuqiang, Hua Geng, Geng Yang, and Xin Zou. "Coordinated Control for Large-Scale Wind Farms with LCC-HVDC Integration." Energies 11, no. 9 (August 23, 2018): 2207. http://dx.doi.org/10.3390/en11092207.

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Wind farms (WFs) controlled with conventional vector control (VC) algorithms cannot be directly integrated to the power grid through line commutated rectifier (LCR)-based high voltage direct current (HVDC) transmission due to the lack of voltage support at its sending-end bus. This paper proposes a novel coordinated control scheme for WFs with LCC-HVDC integration. The scheme comprises two key sub-control loops, referred to as the reactive power-based frequency (Q-f) control loop and the active power-based voltage (P-V) control loop, respectively. The Q-f control, applied to the voltage sources inverters in the WFs, maintains the system frequency and compensates the reactive power for the LCR of HVDC, whereas the P-V control, applied to the LCR, maintains the sending-end bus voltage and achieves the active power balance of the system. Phase-plane analysis and small-signal analysis are performed to evaluate the stability of the system and facilitate the controller parameter design. Simulations performed on PSCAD/EMTDC verify the proposed control scheme.

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5

Chakraborty, Tapan Kumar. "Experimental Investigations of the Self-Controlled Synchronous Motor Connected to a Three-Phase Line Commutated SCR Inverter." International Journal of Power Electronics and Drive Systems (IJPEDS) 7, no. 1 (March 1, 2016): 1. http://dx.doi.org/10.11591/ijpeds.v7.i1.pp1-6.

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<p>This paper concerns the experimental investigations of the three-phase line commutated SCR inverter fed synchronous motor. The fabricated system consists of a line-commuted inverter, a three-phase synchronous motor with the excitation winding connected in series to the inverter input, a terminal voltage sensor and a gate-pulse generating circuit. The firing pulses for SCRs of the inverter are generated by the microprocessor in proper sequence with the help of synchronizing signal derived from the terminal voltages of the synchronous machine. The steady state performance characteristics are obtained experimentally using the fabricated system. The experimental results show that a three-phase synchronous motor supplied by a line commutated inverter with the excitation winding connected in series to the dc link provide excellent characteristics of the conventional dc series motor.</p>

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6

Ismayil, C., and M. Nanda Kumar. "Novel Scheme to Improve Power Factor of Slip Energy Recovery Drive by Selective Harmonic Elimination." International Journal of Emerging Electric Power Systems 15, no. 4 (August 1, 2014): 367–75. http://dx.doi.org/10.1515/ijeeps-2013-0122.

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Abstract In this paper, the harmonic analysis of inverter voltage of a slip energy recovery drive (SERD) is carried out and proposes a novel approach to improve the supply side power factor of the overall drive system. The proposed model is a self-commutated SERD using IGBT inverter, and a modulation technique called selective harmonic elimination (SHE) is applied to improve the supply side power factor. The complete solutions for switching patterns to eliminate the fifth and seventh harmonics are developed using genetic algorithm. SHE method is simulated in semi-open-loop mode, and the power factor of the drive is compared with conventional line commutated thyristor inverter-based SERD. Simulations have been carried out in Matlab/Simulink environment to predetermine the performance of the drive, and results show a significant improvement in the input power factor of the drive.

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7

Antar, Rakan Khalil, Basil Mohammed Saied, and Rafid Ahmed Khalil. "Power Quality Improvement of High Voltage DC Link using Modified Shunt Active Power Filter." Al-Kitab Journal for Pure Sciences 1, no. 1 (June 17, 2018): 54–66. http://dx.doi.org/10.32441/kjps.v1i1.91.

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A new control strategy for active power filters is proposed, modeled and implemented in order to improve the power quality of a line commutated converter High voltage DC link. The ability of reactive power and harmonics reductions are generally met by using passive and active power filters. In this paper, modified active power filter with a modified harmonics pulse width modulation algorithm is used to minimize the source harmonics and force the AC supply current to be in the same phase with AC voltage source at both sending and receiving sides of a line commutated converter high voltage DC link. Therefore, it is considered as power factor corrector and harmonics eliminator with random variations in the load current. The modified harmonics pulse width modulation algorithm is applicable for active power filter based on a three-phase five-level and seven-level cascaded H-bridge voltage source inverter. Simulation results show that the suggested modified multilevel active power filters improve total harmonics distortion of both voltage and current with almost unity effective power factor at both AC sides of high voltage DC link. Therefore, modified active power filter is an effective tool for power quality improvement and preferable for line commutated converter high voltage DC link at different load conditions.

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8

Wasynczuk, O. "Modeling and dynamic performance of a line-commutated photovoltaic inverter system." IEEE Transactions on Energy Conversion 4, no. 3 (1989): 337–43. http://dx.doi.org/10.1109/60.43233.

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9

Wasynczuk, O. "Modeling and Dynamic Performance of a Line-Commutated Photovoltaic Inverter System." IEEE Power Engineering Review 9, no. 9 (1989): 35–36. http://dx.doi.org/10.1109/mper.1989.4310947.

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10

Hayanose, Nobuhiko, Motoo Ishikawa, and Juro Umoto. "Behavior of open-cycle disk MHD generator loading with line-commutated inverter." IEEJ Transactions on Power and Energy 108, no. 10 (1988): 459–66. http://dx.doi.org/10.1541/ieejpes1972.108.459.

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11

Li, Huan, and Kang Qin. "Dynamic Phasor Modelling of LCC-HVDC System Based on a Practical Project." E3S Web of Conferences 256 (2021): 01034. http://dx.doi.org/10.1051/e3sconf/202125601034.

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This paper presents a detailed dynamic phasor modeling process of a line-commutated converter-based HVDC (LCC-HVDC) system. Firstly, the dynamic phasor models of the single-ended LCC rectifier station, inverter station and the DC line are established, respectively. Secondly, LCC-HVDC is an AC-DC-AC system. The interfaces are explained to connect the converter stations with the DC line. Through block modeling, it is helpful to simplify the process and verify the accuracy of each block. Finally, based on a practical project, the model is compared with the electromagnetic-transient (EMT) simulation results in PSCAD/EMTDC to verify the accuracy of the dynamic phasor model.

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12

Turanli, H. M., R. W. Menzies, and D. A. Woodford. "A forced commutated inverter as a small series tap on a DC line." IEEE Transactions on Power Electronics 4, no. 2 (April 1989): 187–93. http://dx.doi.org/10.1109/63.24903.

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13

Inui, Yoshitaka, Motoo Ishikawa, and Juro Umoto. "Power control of coupled nonequilibrium disk MHD generator and line-commutated inverter system." Electrical Engineering in Japan 116, no. 2 (1996): 52–62. http://dx.doi.org/10.1002/eej.4391160205.

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14

Li, Huan, and Kang Qin. "Influence of Inverter Controller Parameters on the Small-signal Stability of LCC-HVDC System Based on a Practical Project." E3S Web of Conferences 256 (2021): 01031. http://dx.doi.org/10.1051/e3sconf/202125601031.

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Unreasonable control parameters of the Line Commutated Converter based High Voltage Direct Current (LCC-HVDC) system may induce small-signal instability. This paper studies the impact of inverter controller parameters on steady response of the LCC-HVDC system under weak AC grid condition. Firstly, according to a practical project, the small-signal model of LCC-HVDC system is established based on the switching function. Then, the eigen-analysis method is adopted to study the impact of the controller parameters on the inverter side on the oscillation mode and damping characteristics of the LCC system, and the correctness of results is verified by PSCAD/EMTDC simulation. The conclusion shows that reasonable controller parameters can improve the stability margin of the system.

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15

UNLU, M., S. CAMUR, E. BESER, and B. ARIFOGLU. "A Current-Forced Line-Commutated Inverter for Single-Phase Grid-Connected Photovoltaic Generation Systems." Advances in Electrical and Computer Engineering 15, no. 2 (2015): 85–92. http://dx.doi.org/10.4316/aece.2015.02011.

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16

Chang, Chien-Hsuan, Hung-Liang Cheng, and En-Chih Chang. "Using the buck-interleaved buck–boost converter to implement a step-up/down inverter." Engineering Computations 34, no. 2 (April 18, 2017): 272–84. http://dx.doi.org/10.1108/ec-08-2015-0241.

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Purpose A typical photovoltaic grid-connection power system usually consists of multi-stage converters to perform multiple functions simultaneously. To simplify system configuration, reduce cost and improve conversion efficiency, this paper aims to develop a buck–boost-type inverter. The proposed inverter has both step-up and step-down functions, so that it is suitable for applications with wide voltage variation. As only one power switch operates with high frequency at one time, switching losses can significantly be reduced. Design/methodology/approach A step-up/down inverter is developed by adopting a buck-interleaved buck–boost (BuIBB) DC-DC converter and connecting with an H-bridge unfolding circuit with line-commutated operation. Finding The proposed circuit can work functionally as either a buck-type or boost-type inverter, so that partial energy can be directly delivered to output to improve efficiency. The input current is shared by two inductors, leading to the reduction of current stresses. Research limitations/implications To apply the proposed inverter to micro-inverter applications in the future, developing a step-up/down inverter with a higher conversion ratio will be considered. Practical implications A laboratory prototype is built accordingly to verify the feasibility of the proposed inverter. The experimental results are presented to show the effectiveness. Originality/value This paper proposes a step-up/down inverter by using the BuIBB converter, which is innovatively studied.

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17

Inui, Yoshitaka, Motoo Ishikawa, and Juro Umoto. "Study on Power Control of Coupled Nonequilibrium Disk MHD Generator and Line-Commutated Inverter System." IEEJ Transactions on Power and Energy 115, no. 2 (1995): 172–79. http://dx.doi.org/10.1541/ieejpes1990.115.2_172.

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18

Chakraborty, Tapan Kumar. "Simulation of Synchronous Motor Supplied by a Three-Phase line Commutated Inverter using Voltage Sensor." International Journal of Electrical and Electronics Engineering 1, no. 5 (May 25, 2014): 10–12. http://dx.doi.org/10.14445/23488379/ijeee-v1i5p103.

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19

Gounden, N. Ammasai, Sabitha Ann Peter, Himaja Nallandula, and S. Krithiga. "Fuzzy logic controller with MPPT using line-commutated inverter for three-phase grid-connected photovoltaic systems." Renewable Energy 34, no. 3 (March 2009): 909–15. http://dx.doi.org/10.1016/j.renene.2008.05.039.

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20

ÜNLÜ, Murat, Sabri ÇAMUR, Ersoy BEŞER, and Birol ARİFOĞLU. "Sinusoidal current injection based on a line-commutated inverter for single-phase grid-connected renewable energy sources." TURKISH JOURNAL OF ELECTRICAL ENGINEERING & COMPUTER SCIENCES 24 (2016): 4670–81. http://dx.doi.org/10.3906/elk-1501-15.

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21

Binu Ben Jose, D. R., N. Ammasai Gounden, and Jayashri Ravishankar. "Simple power electronic controller for photovoltaic fed grid‐tied systems using line commutated inverter with fixed firing angle." IET Power Electronics 7, no. 6 (June 2014): 1424–34. http://dx.doi.org/10.1049/iet-pel.2013.0440.

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22

Inui, Y., H. Sugita, M. Ishikawa, and J. Umoto. "Behavior of He-Cs closed-cycle disk MHD generator connected to electric power system through line-commutated inverter." Energy Conversion and Management 38, no. 7 (May 1997): 625–35. http://dx.doi.org/10.1016/s0196-8904(96)00076-3.

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23

Binu Ben Jose, D. R., N. Ammasai Gounden, and Raavi Sri Naga Ramesh. "A unified power electronic controller for wind driven grid connected wound rotor induction generator using line commutated inverter." Frontiers in Energy 7, no. 1 (January 17, 2013): 39–48. http://dx.doi.org/10.1007/s11708-012-0229-3.

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24

Dharmaian Retnam, Binu Ben Jose, Ammasai Gounden Nanjappa Gounder, and Rajesh Vasu. "Power Electronic Interface with Maximum Power Point Tracking Using Line-commutated Inverter for Grid-connected Permanent Magnet Synchronous Generator." Electric Power Components and Systems 43, no. 5 (February 18, 2015): 543–55. http://dx.doi.org/10.1080/15325008.2014.993050.

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25

Krithiga, S., and N. Ammasai Gounden. "Investigations of an improved PV system topology using multilevel boost converter and line commutated inverter with solutions to grid issues." Simulation Modelling Practice and Theory 42 (March 2014): 147–59. http://dx.doi.org/10.1016/j.simpat.2013.12.014.

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26

Xiao, Chao, Wei Han, Jinxin Ouyang, Xiaofu Xiong, and Wei Wang. "Ride-Through Control Method for the Continuous Commutation Failures of HVDC Systems Based on DC Emergency Power Control." Energies 12, no. 21 (November 2, 2019): 4183. http://dx.doi.org/10.3390/en12214183.

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Continuous commutation failures (CFs) are serious malfunctions in line-commutated converter high-voltage direct current (HVDC) systems that cause the continuous and rapid sag of transmitted power and may threaten the stability of AC systems. The conventional emergency control strategies of AC systems exhibit difficulty in responding quickly and accurately. After suffering from continuous CFs, the forced blocking of direct current (DC) converter to prevent AC system instability might also cause other adverse effects. This study proposes a ride-through control method to improve the endurance capability of AC systems against continuous CFs. An active power output model of inverter station under continuous CFs is built, while considering the process and mechanism of CFs. The impact of continuous DC power sag on the stability of sending-end system is analyzed through a four-area AC/DC equivalent model. A rolling calculation model for the power angle and acceleration area variations of the sending-end system during continuous CFs is established on the basis of model predictive control theory. A calculation method for the emergency power control reference is obtained by using the aforementioned models. Lastly, a ride-through control method for continuous CFs is developed by utilizing the emergency control of adjacent HVDC link. Simulation results show that the proposed control method can improve the endurance capability of an AC system to continuous CFs and reduce blocking risk in an HVDC link.

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27

"MPPT Controller Based on Fuzzy Logic for Photovoltaic Systems using Line-Commutated Inverter and Sepic Converter." International Journal of Innovative Technology and Exploring Engineering 8, no. 10S (September 5, 2019): 41–47. http://dx.doi.org/10.35940/ijitee.j1007.08810s19.

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A controller for maximum power point tracking (MPPT) based on fuzzy logic was developed to connect the solar panels and three phase grid through an inverter. MPPT controller traces the maximum power and then feeds this power to the three phase grid irrespective of the changes in solar irradiations. The input and output variables for the fuzzy logic controller were selected in order to vary the inverter firing angle to track the maximum power from the solar panels. The proposed system using fuzzy logic controller was built using MATLAB Simulink /Power System Block (PSB) set. A DSP controller has been embedded with program for firing of the thyristors used in the inverter with appropriate pulses. Hardware of the entire system was fabricated in the laboratory and the outputs from the PV array of 90 volts, 11 amperes are exhibited. Both the hardware and simulation outputs have been compared which are in close agreement to validate the suggested system.

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28

"97/04704 Behavior of He-Cs closed-cycle disk MHD generator connected to electric power system through line-commutated inverter." Fuel and Energy Abstracts 38, no. 6 (November 1997): 407. http://dx.doi.org/10.1016/s0140-6701(97)81989-3.

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