摘要
目前,微网孤岛控制的实现一般都是基于下垂控制。下垂控制不仅可以保证电压和频率的稳定性,而且可以实现各分布式电源的负荷合理均摊。但是对于电能质量需求较高的情况,下垂控制后一般都会进行二次电压和频率的恢复控制,这就造成了运行成本的提高。针对这种问题,对下垂控制原理进行分析,提出了一种基于"冲洗过滤"恢复电压和频率的方法,该方法在下垂控制前引入了一个"冲洗过滤"控制器,实现了不增加二次通信线路进行电压和频率的恢复。利用PSCAD/EMTDC软件平台进行了模拟实验验证,结果表明,该方法能很好地在微网负荷变化后对电压跌落和频率偏差进行恢复。
At present,the realization of the island microgrid control is generally based on droop control. The droop control can not only ensure the stabilities of voltage and frequency,and realize the reasonable load sharing of distributed generation. But for the high demand of power quality,there will normally be the recovery control of the voltage and frequency for the second time after droop control,which results in the increase of operating costs. In view of this problem,this paper proposes a method based on the ‘washing and filtering ＇to restore the voltage and frequency after the analysis of the droop control principle. This method introduces a ‘washing and filtering ＇controller before droop control,which can restore the voltage and frequency without increasing the secondary communication line. Through the simulation experiment in PSCAD/EM TDC softw are platform,the results show that this method can recover the voltage drop and the frequency deviation after the load change of microgrid.
出处
《电力建设》
北大核心
2016年第10期48-53,共6页
Electric Power Construction
基金
新疆维吾尔自治区重点实验室项目(2016D03021)
国家高技术研究发展计划项目(863计划)(2013AA05064)
教育部创新团队项目(IRT1285)
新疆维吾尔自治区重大攻关项目(201230115-3)
新疆科技厅课题项目(2015KL020)~~
关键词
孤岛微网
下垂控制
冲洗过滤
island microgrid
droop control
washing and filtering
