下垂控制下的微电源并入和退出运行策略  

Connecting and Disconnecting Strategies for Micro Generation Based on Droop Control

作　　者：张帅[1] 刘文红[1] 李锋 潘三博[1] 阙春兰 ZHANG Shua LIU Wenhong LI Feng PAN Sanbo QUE Chunlan(School of Electrical Engineering, Shanghai Dianji University, Shanghai 200240, China Shanghai Ghrepower Green Energy Co., Ltd , Shanghai 201611, China)

机构地区：[1]上海电机学院电气学院,上海200240 [2]上海致远绿色能源股份有限公司,上海201611

出　　处：《电力系统及其自动化学报》2016年第12期49-56,共8页Proceedings of the CSU-EPSA

基　　金：国家科技支撑计划资助项目(2012BAH32F06);上海市教育委员会科研创新资助项目(12YZ187)

摘　　要：为实现微电源在基于下垂控制下微电网中的"即插即用"和功率均分的目的,对微电源并入和退出微电网的过程进行了研究。详细地分析了微电源并入微电网时产生环流的原因,并采用引入二次调频技术的方法,消除了并入过程中出现的环流功率,缩短了系统恢复稳态所需的时间。同时,对微电源退出运行的情况做出了分类讨论,对于负荷过重的情况,提出了利用一、二次调频配合的控制方式,保证了微电网系统频率稳定,实现了负载的分级管理。利用MATLAB/Simulink仿真工具对设计的策略进行了对比研究,结果验证了策略的合理性和可行性。To achieve the function of ＂plug and play＂ and power-sharing in micro grid, the connecting and disconnect- ing processes of micro generations to the micro grid are studied. The theory of circulation current which is caused by mi- cro generations is analyzed in detail. By using secondary frequency modulation, the circulation power is eliminated ef- fectively, and the recovery time to steady state is also reduced. At the same time, different situations when the micro generations are disconnected to the micro grid are discussed. In the case of overload, the strategy of using both primary and secondary frequency modulations is proposed to cut off the loads according to their levels to avoid overloading, which can keep the frequency of micro grid stable. At last, the rationality and feasibility of these strategies are proved by simulation using MATALAB/Simulink.

关 键 词：即插即用 下垂控制 二次调频 环流 MATLAB/SIMULINK 

分 类 号：TM464[电气工程—电器]