串联结构多微网并离网模式切换控制策略

袁昊哲; 杨苹

引用本文:	袁昊哲,杨苹.串联结构多微网并离网模式切换控制策略[J].电力系统保护与控制,2017,45(19):94-100.
	YUAN Haozhe,YANG Ping.Grid-connected and off-grid mode switching control strategies of multi-microgrid with series structure[J].Power System Protection and Control,2017,45(19):94-100

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串联结构多微网并离网模式切换控制策略
袁昊哲¹,杨苹²
(1.广东电网有限责任公司惠州供电局，广东惠州516003;2.华南理工大学电力学院，广东广州 510640)

摘要:

相邻区域内的微电网因互联互供所需可组成多微网系统。在研究单微网的锁相环控制、联络线功率和相位调节的基础上，针对串联结构多微网的结构特点，提出一种多微网并/离网模式切换控制策略。对于离转并模式切换，在不同初始相角和储能频率参考值的情况下，计算相应的离转并切换时间。对于并转离模式切换，根据主动和被动并转离两种情况，对子微网储能输出功率和联络线功率进行调节。仿真结果验证了该控制策略可实现串联结构多微网并/离网模式快速切换。

关键词: 多微网串联结构模式切换初始相角联络线功率

DOI：10.7667/PSPC161569

分类号:

基金项目:国家863计划(2014AA052001); 广东省科技计划项目(2012B040303005)

Grid-connected and off-grid mode switching control strategies of multi-microgrid with series structure

YUAN Haozhe¹,YANG Ping²

(1. Huizhou Electric Power Supply Bureau of Guangdong Power Grid Corporation, Huizhou 516003, China;2. School of Electric Power, South China University of Technology, Guangzhou 510640, China)

Abstract:

Due to interconnection and power supply, multi-microgrid system can be composed of multiple microgrids in adjacent area. Based on researches of single microgrid phase-locked loop control, tie-line power and phase adjustment, this paper presents grid-connected and off-grid mode switching control strategies of multi-microgrid with series structure characteristic. For off-grid to grid-connected mode switching, the control strategies calculate mode switching time of off-grid to grid-connected in different cases of initial phase and energy storage frequency reference value. For grid-connected to off-grid mode switching, based on the active and passive mode switching, the control strategies adjust energy storage output power and tie-line power of the sub-microgrid. Simulation results verify that the control strategies can realize grid-connected and off-grid mode fast switching of multi-microgrid with series structure. This work is supported by National High-tech R & D Program of China (863 Program) (No. 2014AA052001) and Science and Technology Program of Guangdong Province (No. 2012B040303005).

Key words: multi-microgrid series structure mode switching initial phase tie-line power

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