下垂控制逆变器中并网功率控制策略

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Abstract Droop control strategy is widely applied in AC microgrid to realize the seamless transition between grid-connected (GC) mode and islanding (IS) mode, and to achieve average power sharing among different inverters. However, there is a lack of analysis about the operation of droop control strategy in GC mode. Actually, the power flow control in GC mode may be influenced by the fluctuation of grid frequency and voltage magnitude. Moreover, tracking error also exists in the reactive power control loop. The feedforward of grid frequency and voltage magnitude is proposed to suppress the grid fluctuation impacts in this paper. The voltage magnitude control of PCC voltage is added to realize the precise reactive power control. With the implementation of the proposed control scheme, accurate power flow control is guaranteed for droop-controlled inverters in GC mode.

Key words： Droop control grid fluctuation power flow control feedforward control of grid frequency and voltage magnitude voltage magnitude control of common coupling point

Received: 21 October 2015 Published: 02 December 2016

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TM464

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	Articles by authors
	Tao Yong
	Deng Yan
	Chen Guipeng
	He Xiangning

Cite this article:

Tao Yong,Deng Yan,Chen Guipeng等. Power Flow Control Strategy for Droop-Controlled Inverters[J]. Transactions of China Electrotechnical Society, 2016, 31(22): 115-124.

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https://dgjsxb.ces-transaction.com/EN/ OR https://dgjsxb.ces-transaction.com/EN/Y2016/V31/I22/115

[1] Lasseter R H. MicroGrids[C]//Power Engineering Society Winter Meeting, 2002: 305-308.
[2] 王成山, 武震, 李鹏. 微电网关键技术研究[J]. 电工技术学报, 2014, 29(2): 1-12.
Wang Chengshan, Wu Zhen, Li Peng. Research on key technologies of microgrid[J]. Transactions of China Electrotechnical Society, 2014, 29(2): 1-12.
[3] 窦春霞, 李娜, 徐晓龙. 基于多智能体系统的微电网分散协调控制策略[J]. 电工技术学报, 2015, 30(7): 125-134.
Dou Chunxia, Li Na, Xu Xiaolong. Multi-agent system based decentralized coordinated control strategy for micro-grids[J]. Transactions of China Electrotechnical Society, 2015, 30(7): 125-134.
[4] Liu Z, Liu J, Zhao Y. A unified control strategy for three-phase inverter in distributed generation[J]. IEEE Transactions on Power Electronics, 2014, 29(3): 1176-1191.
[5] 邱麟, 许烈, 郑泽东, 等. 微电网运行模式平滑切换的控制策略[J]. 电工技术学报, 2014, 29(2): 171-176.
Qiu Lin, Xu Lie, Zheng Zedong, et al. Control method of microgrid seamless switching[J]. Transa- ctions of China Electrotechnical Society, 2014, 29(2): 171-176.
[6] Guerrero J M, Chandorkar M, Lee T, et al. Advanced control architectures for intelligent microgrids-part I: decentralized and hierarchical control[J]. IEEE Transactions on Industrial Electronics, 2013, 60(4): 1254-1262.
[7] 荆龙, 黄杏, 吴学智. 改进型微源下垂控制策略研究[J]. 电工技术学报, 2014, 29(2): 145-153.
Jing Long, Huang Xing, Wu Xuezhi. Research on improved microsource droop control method[J]. Transactions of China Electrotechnical Society, 2014, 29(2): 145-153.
[8] Guerrero J M, Loh P C, Lee T, et al. Advanced control architectures for intelligent microgrids-part II: power quality, energy storage, and AC/DC micro- grids[J]. IEEE Transactions on Industrial Electronics, 2013, 60(4): 1263-1270.
[9] Liu Q, Tao Y, Liu X, et al. Voltage unbalance and harmonics compensation for islanded microgrid inver- ters[J]. IET Power Electronics, 2014, 7(5): 1055-1063.
[10] He J, Li Y W, Guerrero J M, et al. An islanding microgrid power sharing approach using enhanced virtual impedance control scheme[J]. IEEE Transa- ctions on Power Electronics, 2013, 28(11): 5272- 5282.
[11] 刘海涛, 吕志鹏, 苏剑, 等. 具有功率精确分配能力的逆变器电压谐波分频下垂控制方法研究[J]. 电力系统保护与控制, 2015, 43(19): 9-14.
Liu Haitao, Lü Zhipeng, Su Jian, et al. Inverter’s frequency dividing droop controller with accurate load sharing ability[J]. Power System Protection and Control, 2015, 43(19): 9-14.
[12] Zhong Q. Robust droop controller for accurate proportional load sharing among inverters operated in parallel[J]. IEEE Transactions on Industrial Elec- tronics, 2013, 60(4): 1281-1290.
[13] Tao Y, Liu Q, Deng Y, et al. Analysis and mitigation of inverter output impedance impacts for distributed energy resource interface[J]. IEEE Transactions on Power Electronics, 2015, 30(7): 3563-3576.
[14] 吴翔宇, 沈沉, 赵敏, 等. 基于公共母线电压的微电网孤网运行下垂控制策略[J]. 电工技术学报, 2015, 30(24): 135-142.
Wu Xiangyu, Shen Chen, Zhao Min, et al. A droop control method based on PCC bus voltage in islanded microgrid[J]. Transactions of China Electrotechnical Society, 2015, 30(24): 135-142.
[15] 孟建辉, 石新春, 王毅, 等. 改善微电网频率稳定性的分布式逆变电源控制策略[J]. 电工技术学报, 2015, 30(4): 70-79.
Meng Jianhui, Shi Xinchun, Wang Yi, et al. Control strategy of DER inverter for improving frequency stability of microgrid[J]. Transactions of China Electrotechnical Society, 2015, 30(4): 70-79.
[16] Kundur P. Power system stability and control[M]. New York: McGraw-Hill Professional, 1994.
[17] Min D, Marwali M N, Jin-Woo J, et al. Power flow control of a single distributed generation unit[J]. IEEE Transactions on Power Electronics, 2008, 23(1): 343-352.
[18] Li Y W, Kao C. An accurate power control strategy for power-electronics-interfaced distributed gener- ation units operating in a low-voltage multibus micro- grid[J]. IEEE Transactions on Power Electronics, 2009, 24(12): 2977-2988.
[19] 苏虎, 曹炜, 孙静, 等. 基于改进下垂控制的微网协调控制策略[J]. 电力系统保护与控制, 2014, 42(11): 92-98.
Su Hu, Cao Wei, Sun Jing, et al. Micro-grid coor- dinated control strategy based on improved droop control[J]. Power System Protection and Control, 2014, 42(11): 92-98.
[20] 徐玉琴, 马焕均. 基于改进下垂控制的逆变器并联运行技术[J]. 电力系统保护与控制, 2015, 43(7): 103-107.
Xu Yuqin, Ma Huanjun. Parallel operation techno- logy of inverters based on improved droop control[J]. Power System Protection and Control, 2015, 43(7): 103-107.