摘要
为掌握光伏发电并网对电压稳定性的影响,首先基于广义负载概念建立光伏发电并网系统(PVGS)统一电路模型,并利用该模型研究了电压稳定性。研究表明广义负载功率波动、功率因数、接入配电网电压等级对电压波动影响较大,提高并稳定并网点功率因数是提高电压稳定性的根本方法。最后对某公司500kWp光伏发电并网系统测试分析,证明了上述结论。
In order to gain an understanding of the effects the photovoltaic（PV） generation might have upon the voltage stability in distribution grid, a general PV grid-connected power generation system（PVGS） circuit model based generalized load is built in this paper, and is applied to study the voltage stability. The simulation results show that voltage fluctuation is deeply affected by the fluctuation power, the power factor and the voltage levels of distribution grid. The basic approach to improve voltage stability is to increase and stable power factor. Finally, some simulation conclusions are showed by analysis of the data measured in a company 500kWp PV grid-connected system.
出处
《电工技术学报》
EI
CSCD
北大核心
2013年第3期241-247,共7页
Transactions of China Electrotechnical Society
关键词
配电网
光伏发电
广义负载
电路模型
电压稳定性
Distribution grid, photovoltaic generation, generalized load, circuit model, voltage stability
