链式STATCOM直流侧电压平衡控制策略研究

doi:10.11930/j.issn.1004-9649.2013.9.86.5

摘要/Abstract

摘要： 针对STATCOM电容直流电压不稳定问题进行了分析,提出了一种增加附加充放电电路方式的STATCOM电容电压控制策略。采用附加电路对链式STATCOM电容进行充电及稳压控制,其中附加电路多绕组变压器的使用,有效地隔离了附加电路各链节直接的电的联系,消除了附加电路和装置主电路同时投入时电压瞬时降为零的现象,使得附加电路的控制策略可以完全和主电路控制策略独立;附加电路既可以直接接到大电网中,也可以采用与电网分离的独立供电电源,甚至可以采用大容量的UPS,可以较好地实现装置启动、快速功率切换等。装置动态响应能力亦有所增强,同时当主电路出现较大电压波动时,仍可以保证STATCOM电容电压的稳定,正常地输出无功。

关键词: 链式结构, STATCOM, 直流侧电压, 不平衡, 控制策略

Abstract: This paper studies the unstable problem of capacitor voltage in the DC-link of STATCOM, and proposes a new control strategy with additional circuits, which are used to control charge and voltage stability. The use of additional circuit multi-winding transformer effectively isolates the direct electrical contact between the additional circuits and the main circuits of devices, and avoids the occurrence of instantaneous zero capacitance voltage when the additional circuits and the main circuits of devices are put into operation concurrently. This method makes the control strategy of additional circuit independent of the control strategy of the main circuit. The additional circuit can either connects to the large power grids, or use independent stand-alone power supply separated from the grid, or the large capacity UPS, which can preferably achieve devices starting, fast power switching and so on. In addition, the dynamic response of the devices can also be enhanced, and the STATCOM capacitor voltage stability and normal reactive output can be ensured at the same time, when the main circuits have larger voltage fluctuations.

Key words: cascade structure, STATCOM, DC voltage, unbalance, control strategy

中图分类号:

TM714

周圆, 夏明超, 任一彪. 链式STATCOM直流侧电压平衡控制策略研究[J]. 中国电力, 2013, 46(9): 86-91.

ZHOU Yuan, XIA Ming-chao, REN Yi-biao. Balancing Control Method of DC Voltage of Cascade STATCOM[J]. Electric Power, 2013, 46(9): 86-91.

导出引用管理器 EndNote|Ris|BibTeX

链接本文: https://www.electricpower.com.cn/CN/10.11930/j.issn.1004-9649.2013.9.86.5

https://www.electricpower.com.cn/CN/Y2013/V46/I9/86

参考文献

[1] MISHRA S, PANIGRAHI B K, TRIPATHY M. A hybrid adaptive-bacterial-foraging and feedback linearization scheme based D-STATCOM[C]//International Conference on Power System Technology, Singapore, 2004: 275-270.
[2] BHIM S, JITENDRA S, VIHAL V. Neural network based control of reduced rating DSTATCOM[C]//IEEE Indicon Conference,Chennai, 2005: 516-520.
[3] TWININGE, NEWMAN M J, LOH P C, et al . Voltage compensation in weak distribution networks using D-STATCOM[C]//The Fifth International Conference on Power Electronics and Drive Systems, 2003, 1: 177-173.
[4] SU C, CEZA J. Direct power control of DSTATCOMs for voltage flicker mitigation[C]//36th IAS Annual Meeting Industry Application Conference, 2001, 4: 2673-2690.
[5] 刘文华,宋强,滕乐天,等. 基于链式逆变器的50 Mvar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 Wen-hua, SONG Qiang, TENG Le-tian, et al . Balancing control of DC voltages of 50 Mvar STATCOM based on cascade multilevel inverters[J]. Proceedings of the CSEE, 2004, 24(4): 145-150.
[6] 陈坚. 电力电子学：电力电子变换和控制技术[M]. 北京：高等教育出版社,2004.
[7] 谢小荣,姜齐荣. 柔性交流输电系统的原理和应用[M]. 北京：清华大学出版社,2006.
[8] PENG Fang-zheng, LAI Ji-sheng, MCKEEVER J W, et al . A multilevel voltage-source inverter with separate DC sources for static var generation[J]. IEEE Trans on Industry Applications,1996, 32(5): 356-364.
[9] TOLBERT L M, PENG F Z, CUNNYNGHAM T, et al . Charge balance control schemes for cascade multilevel converter in hybrid electric vehicles [J]. IEEE Tram. Ind. Electron, 2002, 49(5): 1057-1064.
[10] 张锋,晁勤. STATCOM改善风电场暂态电压稳定性的研究[J].电网技术,2007,32（9）：70-73.
ZHANG Feng, CHAO Qin. Research on dc-link capacitor voltage control strategies of the cascaded STATCOM[J]. Power System Technology, 2007, 32(9): 70-73.
[11] 拜润卿,秦睿,智勇,等. 风电基地动态无功补偿装置参数实测与分析[J]. 中国电力,2012,45（2）：54-57.
BAI Run-qing, QIN Rui, ZHI Yong, et al . Parameter test and analysis for dynamic compensation devices in wind power farms[J]. Electric Power, 2012, 45(2): 54-57.
[12] 牛远方. 电网故障时风电场基于STATCOM的无功协调控制策略[J]. 中国电力,2011,44（3）：11-15.
NIU Yuan-fang. Coordinated reactive power control strategy for wind farms with STATCOM under grid faults[J]. Electric Power,2011, 44(3): 11-15.
[13] 耿俊成,刘文华,袁志昌. 链式STATCOM电容电压不平衡现象研究：（二）数学模型[J]. 电力系统自动化,2003,27（17）：35-39.
GENG Jun-cheng, LIU Wen-hua, YUAN Zhi-chang. Research on the voltage unbalance of DC capacitors of cascade STATCOM: part two mathematical model [J]. Automation of Electric Power Systems, 2003, 27(17): 35-39.
[14] 耿俊成,刘文华,袁志昌. 链式STATCOM电容电压不平衡现象研究：（一）仿真和试验[J]. 电力系统自动化,2003,27（16）：53-57,86.
GENG Jun-cheng, LIU Wen-hua, YUAN Zhi-chang. Research on the voltage unbalance of dc capacitors of cascade STATCOM: part one simulations and experiments [J]. Automation of Electric Power Systems, 2003, 27(16): 53-57, 86.
[15] 任明炜,孙玉坤,饶翔. 十一电平链式STATCOM直流电容电压平衡控制研究[J]. 高压电器,2010,46（4）：10-15.
REN Ming-wei, SUN YU-kun, RAO Xiang. Voltage balance control of DC capacitors of 11-level cascade STATCOM[J]. High Voltage Apparatus, 2010, 46(1): 10-15.
[16] 张国澎. 级联H桥整流及其直流侧电容电压平衡控制的研究[D]. 北京：中国矿业大学（北京）,2012.
[17] 刘钊. 风力发电系统中链式STATCOM关键技术[D]. 武汉：华中科技大学,2010.
[18] 臧春艳,裴振江,何俊佳,等. 链式STATCOM直流侧电容电压控制策略研究[J]. 高压电器,2010,46（1）：17-21.
ZANG Chun-yan, PEI Zhen-jiang, HE Jun-jia, et al . Research on dc-link capacitor voltage control strategies of the cascaded STATCOM [J]. High Voltage Apparatus, 2010, 46(1): 17-21.
[19] 吴振兴,邹云屏,张允,等. 单相PWM整流器输入电流波形的改善技术[J]. 高电压技术,2007,34（3）：603-608.
WU Zhen-xing, ZOU Yun-ping, ZHANG Yun, et al . Supply current waveform improvement technique for single-phase PWM rectifier [J]. High Voltage Engineering, 2007, 34(3): 603-608.
[20] 杜明军. 大容量STATCOM主电路及控制策略的研究[D]. 北京：北京交通大学,2012.
DU Ming-jun. The study on the main circuit and control strategy of large capacity STATCOM[D]. Beijing: Beijing Jiaotong University, 2012.