电网电压不平衡对STATCOM的影响及抑制

Abstract
Figure/Table
References
Related Citation (15)

Download: PDF (927 KB) HTML (1 KB)
Export: BibTeX | EndNote (RIS)

Abstract The unbalanced grid voltage has a serious influence on the output performance and safe operation of the static synchronous compensator(STATCOM), DC side capacitor produces double frequency voltage fluctuation, AC side output current contains negative sequence and third-order harmonic, and converter may be overcurrent caused by negative sequence current and third-order harmonic current. To solve this problem, the influence of unbalanced voltage to STATCOM is analysed on the basis of switch function method, a new dual-loop control strategy is proposed to suppress the influence and an improved switching function modulation is proposed to suppress the third-order harmonic current in order to make STATCOM safe in this paper. The STATCOM is operated as a current source controlled by the voltage at the point of common coupling(PCC) to suppress the unbalanced system voltage. The compensation effect is related to control parameters closely, and reasonable selection of PCC voltage phase angle can guarantee the minimum compensation capacity under the condition of optimal compensation performance of the STATCOM. Simulation and experimental results verify the correctness and validity of the present control strategy and theoretic analysis.

Key words： Grid voltage unbalance static synchronous compensator switch function method dual-loop control strategy voltage controlled current source

Received: 08 January 2013 Published: 05 November 2014

PACS:

TM712

	Service

	E-mail this article
	Add to my bookshelf
	Add to citation manager
	E-mail Alert
	RSS
	Articles by authors
	Yi Guiping
	Hu Renjie
	Jiang Wei
	Huang Huichun

Cite this article:

Yi Guiping,Hu Renjie,Jiang Wei等. Influence of Grid Voltage Unbalance on STATCOM and the Countermeasure[J]. Transactions of China Electrotechnical Society, 2014, 29(6): 238-247.

URL:

http://dgjsxb.ces-transaction.com/EN/ OR http://dgjsxb.ces-transaction.com/EN/Y2014/V29/I6/238

[1] 中国国家标准GB/T 15543—1995. 电能质量三相电压允许不平衡度[S]. 北京: 中国标准出版社, 1995.
[2] Twining E, Newman M J, Loh P C, et al. Voltage compensation in weak distribution network using a D-STATCOM[C]. Proceedings of the 5th International Conference on Power Electronics and Drive Systems, Singapore, 2003.
[3] Pillay P, Manyage M. Definitions of voltage unbalance [J]. IEEE Power Engineering Review, 2001, 21(5): 50-51.
[4] 彭力, 白丹, 康勇, 等. 三相逆变器不平衡抑制研究[J]. 中国电机工程学报, 2004, 24(5): 174-178. Peng Li, Bai Dan, Kang Yong, et al. Research on three-phase inverter with unbalanced load[J]. Procee- dings of the CSEE, 2004, 24(5): 174-178.
[5] Cavaliere C A C, Watanabe E H, Aredes M. Multi- pulse statcom operation under unbalanced voltages[C]. Proceedings of the IEEE Power Engineering Society Winter Meeting, New York, USA, 2002: 567-572.
[6] Sensarma P S, Padiyar K R, Ramanarayanan V. Analysis and performance evaluation of a distribution STATCOM for compensation voltage fluctuations[J]. IEEE Transactions on Power Delivery, 2001, 16(2): 259-264.
[7] 马晓军, 姜齐荣, 陈建业, 等. 不对称系统的设计参数对STATCOM性能的影响[J]. 清华大学学报: 自然科学版, 2000, 40(7): 23-26. Ma Xiaojun, Jiang Qirong, Chen Jianye, et al. Influence of design parameters upon STATCOM performance for asymmetric power systems[J]. Journal of Tsinghua University: Sci & Tech, 2000, 40(7): 23-26.
[8] Blazic B, Papic I. STATCOM control for operation with unbalanced voltages[C]. The 12th International Power Electronics and Motion Control Conference, Portoroz, Slovenia, 2006: 1454-1459.
[9] 唐杰. 配电网静止同步补偿器(D-STATCOM)的理论与技术研究[D]. 长沙: 湖南大学, 2007.
[10] 荣飞, 罗安, 范卿. 应用于不平衡系统的STATCOM电压控制新方法[J]. 电工技术学报, 2010, 25(3): 138-143. Rong Fei, Luo An, Fan Qing. A novel voltage control method applied in STATCOM under unbalanced system[J]. Transactions of China Electrotechnical Society, 2010, 25(3): 138-143.
[11] 魏文辉, 刘文华, 宋强, 等. 基于逆系统方法有功-无功解耦PWM控制的链式STATCOM动态控制策略研究[J]. 中国电机工程学报, 2005, 25(3): 23-28. Wei Wenhui, Liu Wenhua, Song Qiang, et al. Research on fast dynamic control of static synchronous compensator using cascade multilevel inverters[J]. Proceedings of the CSEE, 2005, 25(3): 23-28.
[12] Li Kuang, Liu Jinjun, Wang Zhaoan, et al. Static Var generator control strategy for unbalanced systems in medium voltage applications[C]. Proceedings of the IEEE International Conference PESC’2004, Yachen, Germany, 2004: 4257-4262.
[13] 李旷, 刘进军, 王兆安, 等. 静止无功发生器在电压不平衡下的工作特性及其对不平衡电压的补偿[J]. 电工技术学报, 2006, 21(8): 69-74. Li Kuang, Liu Jinjun, Wang Zhaoan, et al. Operation and control of static var generator for voltage unbalance mitigation[J]. Transactions of China Electrotechnical Society, 2006, 21(8): 69-74.
[14] Chen W L, Hsu Y Y. Direct output voltage control of a static synchronous compensator using current sensorless d-q vector-based power balancing scheme [J]. IEEE Transactions on Power Delivery, 2003, 2(7-12): 545-549.
[15] 唐杰, 罗安, 周柯. 静止同步补偿器电压控制器的设计与实现[J]. 电工技术学报, 2006, 21(8): 103-107. Tang Jie, Luo An, Zhou Ke. Design and realization voltage control for static synchronous compensator[J]. Transactions of China Electrotechnical Society, 2006, 21(8): 103-107.
[16] Bina M T, Eskandari M D. Consequence of unbalance supplying condition on a distribution static compensa- tion[C]. IEEE Power Electronics Specialists Conference, Aachen, Germany, 2004.
[17] Bostjan Blazic, Igor Papic. Improved D-Statcom control for operation with unbalanced currents and voltages[J]. IEEE Transactions on Power Delivery, 2006, 21(1): 225-233.
[18] 丁洪发, 段献忠, 何仰赞. 同步检测法的改进及其在三相不对称无功补偿中的应用[J]. 中国电机工程学报, 2000, 20(6): 17-20. Ding Hongfa, Duan Xianzhong, He Yangzan. Improvement of synchronous detection method and application for VAR compensation of unbalanced three-phase system[J]. Proceedings of the CSEE, 2000, 20(6): 17-20.
[19] IEEE Std 1459—2000. IEEE trial-use standard definitions for the measurement of electric power quantities under sinusoidal, nonsinusoidal, balanced, or unbalanced conditions[S]. USA: IEEE Press, 2000.