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| DC Bus Voltage Balancing Control of Three-Phase Cascade Power Regulation System with Star Connection |
| Wan Chengkuan1, 3, Yang Geng2, Zhang Tongshuo3, Wu Weiyang3, Lai Chengyi1 |
| 1. Chengdu Dongfang Hitachi Electric Control Co. Ltd Chengdu 611731 China 2. Tsinghua University Beijing 100084 China 3. Key Lab of Power Electronics for Energy Conservation and Motor Drive Yanshan University Qinhuangdao 066004 China |
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Abstract Three-phase cascade H-bridge (CHB) power regulation system (PRS) can be used for the dynamic adjustment of active and/or reactive power in power grid. This system consists of many sets of DC bus. Because of the performance differences of the electrical storage unit and load imbalance in DC bus, the DC link voltages are imbalance among different phases, which makes derating operation or even failure. This paper proposes a DC voltage balance method based on the negative-sequence-voltage injection. The principle of the method is described and the basic algorithms are derived for the implementation. The strategy is also compared with the zero-sequence voltage injection based strategy. The simulation and experimental results verify validity of the method.
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Received: 31 December 2011
Published: 20 March 2014
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[1] Smith JC. Wind power: present realities and future possibilities[J]. IEEE Proceedings, 2009, 97(2): 195-197.
[2] Blaabjerg F, Chen Z, Kjaer S. Power electronics as efficient interface in dispersed power generation systems[J]. IEEE Transactions on Power Electronics, 2004, 19(5): 1184-1194.
[3] Baran M E, Teleke S, Anderson L, et al. STATCOM with energy storage for smoothing intermittent wind farm power[C]. IEEE Conference Proceedings, 2008: 1-6.
[4] J S Lai, F Z Peng. Multilevel converters—a new breed of power converter[J]. IEEE Transactions on Industry Application, 1996, 32(3): 509-517.
[5] Maharjan L, Inoue S, Akagi H. A transformerless energy storage system based on a cascade multilevel PWM converter with star configuration[J]. IEEE Transactions on Industry Application, 2008, 44(5): 1621-1630.
[6] 刘文华, 宋强, 滕乐天, 等. 基于链式逆变器的50MVA静止同步补偿器的直流电压平衡控制[J]. 中国电机工程学报, 2004, 24(4): 145-150.
Liu Wenhua, Song Qiang, Teng Letian, et al. Balancing control of DC voltages of 50 MVA STATCOM based on cascade multilevel inverters[J]. Proceedings of the CSEE, 2004, 24(4): 145-150.
[7] Q Song, W Liu, Z Yuan, et al. DC voltage balancing technique using multi-pulse optimal PWM for cascade H-bridge inverters based STATCOM[C]. In Proceedings of IEEE PESC, Aachen, Germany, 2004.
[8] F Z Peng, J S Lai. A multilevel voltage-source inverter with separate DC sources for static var generation[J]. IEEE Transactions on Industry Application, 1996, 32(5): 1130-1138.
[9] 刘钊, 刘邦银, 段善旭, 等. 链式静止同步补偿器的直流电容电压平衡控制[J]. 中国电机工程学报, 2010, 29(30): 7-12.
Liu Zhao, Liu Bangyin, Duan Shanxu, et al. DC capacitor voltage balancing control for cascade multilevel STATCOM[J]. Proceedings of the CSEE, 2010, 29(30): 7-12.
[10] T J Summers, R E Betz, G Mirzaeva. Phase leg voltage balancing of a cascaded H-bridge converter based STATCOM using zero sequence injection[C]. 13th European Conference on Power Electronics and Application, 2009.
[11] 中国国家标准化管理委员会. GB/T 15543-2008 电能质量三相电压不平衡[S]. 北京: 中国标准出版社, 2008.
[12] IEEE Std 1159™-2009. IEEE Recommended Practice for Monitoring Electric Power Quality[S]. 2009.
[13] C Wan, G Yang, W Wu, et al. An active and reactive power regulating system based on a cascaded- converter[C]. The 2nd International Symposium on Power Electronics for Distributed Generation Systems, Hefei, China, 2010.
[14] Chengkuan Wan, Geng Yang, Hua Geng, et al. DC link voltage balancing control of a three-phase cascade power regulation system with star connection[C]. International Conference on Electrical Machines and Systems, Beijing, China, 2011.
[15] Elena Villanueva, Pablo Correa, José Rodríguez, et al. Control of a single-phase cascaded H-bridge multilevel inverter for grid-connected photovoltaic systems[J]. IEEE Transactions on Industry Electronics, 2009, 6(11): 4399-4406. |
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2012, Vol. 27 
