串联结构多微网并离网模式切换控制策略-电力系统保护与控制.PDF

第 45 卷 第 19 期 电力系统保护与控制 Vol.45 No.19 2017 年 10 月 1 日 Power System Protection and Control Oct. 1, 2017 DO : 10.7667/PSPC161569 串联结构多微网并离网模式切换控制策略 1 2 袁昊哲 ，杨 苹 (1.广东电网有限责任公司惠州供电局，广东 惠州 516003；2.华 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 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 Grid-connected and off-grid mode switching control strategies of multi-microgrid with series structure 1 2 YUAN Haozhe , YANG Ping (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 adj acent 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 frequenc