改善微电源无功分配精度的分布式电压调整方法  

Distributed Voltage Control of a Microgrid to Improve Reactive Power Sharing among Micro-sources

作　　者：陈亚红[1] 和军平[1] 李鑫[1] 李方正 CHEN Yahong HE junping LI xin LI Fangzheng(School of Mechanical Engineering and Automation, Shenzhen Graduate School, Harbin Institute of Technology, Shenzhen 518055, China Haikou Power Supply Company, China Southern Power Grid, Haikou 570000, China)

机构地区：[1]哈尔滨工业大学深圳研究生院机电工程与自动化学院,广东深圳518055 [2]南方电网公司海口供电局,海南海口570000

出　　处：《上海电力学院学报》2017年第3期229-233,共5页Journal of Shanghai University of Electric Power

基　　金：深圳市科技计划项目(YCYJ20160531190745967)

摘　　要：提出了一种根据可调度微电源无功出力信息,在线计算无功-电压下垂曲线的斜率、电压和无功参考值的算法.在一次电压下垂控制基础上,通过动态调整下垂曲线斜率、电压和无功参考值,改善分布式可调度微电源无功输出的均分能力.负载无功需求平衡后,通过分布式二次电压调整将微电源端电压恢复到允许范围内,以提高电压质量,并实现分布式调压和无功输出均分.在Matlab/Simulink平台上搭建微网动态模型,仿真验证了所提策略的有效性.An algorithm for online computing Q-U droop rate, voltage and reactive power reference values is proposed according to schedulable DGs reactive power output information. Based on the primary Q-U droop control, the ability DGs to share the reactive power is improved by dynami- cally adjusting the droop rate, voltage and reactive power reference values. After the load demands are satisfied, the distributed secondary voltage control restores the voltage amplitude of DGs to norreal range and improves voltage quality. The strategy proposed can realize the distributed voltage stable control and reactive power sharing function. The dynamic simulation model of MG on Matlab/Simulink platform is built. Simulation results verify the effectiveness of the orooosed stratery.

关 键 词：微网 无功均分 分布式电压 

分 类 号：TM732[电气工程—电力系统及自动化] TM76