光伏发电并网系统的仿真建模及对配电网电压稳定性影响  

Simulation Model of Photovoltaic Generation Grid-Connected System and Its Impacts on Voltage Stability in Distribution Grid

作　　者：陈权[1] 李令冬[1] 王群京[1] 段晓波[1] 叶金根[2] 曾野[1] 

机构地区：[1]安徽大学教育部电能质量工程研究中心,合肥230601 [2]河北省电力公司,石家庄050021

出　　处：《电工技术学报》2013年第3期241-247,共7页Transactions of China Electrotechnical Society

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.

关 键 词：配电网 光伏发电 广义负载 电路模型 电压稳定性 

分 类 号：TM712[电气工程—电力系统及自动化]