摘要
采用下垂控制的微电网在孤岛模式运行时,负荷的变动会使其分布式电源的功率输出产生波动,使系统的频率暂态响应下降。针对这些不良影响,分析比较了几种不同下垂控制策略的性能优劣,结合自适应下垂控制和电压相角控制,提出了一种改进的下垂控制策略,并通过PSCAD/EMTDC软件进行了仿真实验。实验结果表明,当孤岛模式运行的微电网内部动态特性变化时,该控制策略可以防止功率输出波动,提高系统稳定性。
When microgrid with droop control running in isolated mode,the power output of distributedgeneration will be fluctuated and the frequency transient response of system will be declined after change of load.Forthese adverse effects,compared several kinds of droop control strategies,and proposed an improved droop controlstrategy combined with adaptive control and voltage phase angle control and simulation by PSCAD/EMTDC software.Experimental results show that,this control strategy can prevent fluctuations of power output and improve systemstability when internal dynamic characteristics of the microgrid which run in isolated mode have changed.
出处
《电气传动》
北大核心
2017年第1期18-22,共5页
Electric Drive
基金
教育部创新团队项目(IRT1285)
自治区重大攻关计划项目(201230115)
博士点专项基金项目(20126501130001)
国家863计划(2013AA050604)
