分布式光伏发电系统防孤岛保护策略研究
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摘要
针对分布式光伏系统的孤岛效应问题,本文在分析光伏发电系统防孤岛保护原理的基础上,介绍了被动式孤岛检测与主动式孤岛检测方式,并提出了持续性无功扰动方法。该方法通过注入干扰无功功率引起电压或频率变化,从而根据变化的大小来判断是非处于孤岛运行状态。仿真结果表明,采用该方法可以很好地检测光伏发电系统的孤岛发生情况。
Aiming at the problem of isolated island effect in distributed photovoltaic system,based on the analysis of the principle of anti-island protection in photovoltaic power generation system,this paper introduced the methods of passive island detection and active island detection,and put forward a continuous reactive power disturbance method.The method caused voltage or frequency change by injecting interference reactive power,so that the non-island running state was judged according to the change size.The simulation results showed that this method could detect the island occurrence of photovoltaic power generation system well.
Aiming at the problem of isolated island effect in distributed photovoltaic system,based on the analysis of the principle of anti-island protection in photovoltaic power generation system,this paper introduced the methods of passive island detection and active island detection,and put forward a continuous reactive power disturbance method.The method caused voltage or frequency change by injecting interference reactive power,so that the non-island running state was judged according to the change size.The simulation results showed that this method could detect the island occurrence of photovoltaic power generation system well.
引文
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[3]范明天,张祖平.主动配电网规划相关问题的探讨[J].供用电,2014(1):22-27.
[4]Repo S,Maki K,Jarventausta P,et al.ADINE-EU demonstration project of active distribution network[C]//ADINE-EU demonstration project of active distribution network.SmartGrids for Distribution,2008IET-CIRED CIRED Seminar.
[5]Milanovic'J V,Zali S M.Validation of Equivalent Dynamic Model of Active Distribution Network Cell[J].IEEE Transactions on Power Systems,2013,28(3):2101-2110.
[6]丁明,林根德,陈自年,罗亚桥,赵波.一种适用于混合储能系统的控制策略[J].中国电机工程学报,2012,32(7):1-6.
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[8]尤毅,刘东,于文鹏,等.主动配电网技术及其进展[J].电力系统自动化,2012(18):10-16.
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[10]Callaway D S,Hiskens I A.Achieving Controllability of E-lectric Loads[J].Proceedings of the IEEE,2011,99(1):184-199.