继电保护整定计算中光伏发电站阻抗的计算方法研究  

Impedance Calculation Method of Photovoltaic Power Station in Relay Setting Calculation

作　　者：侯瑞鹏[1] 杨明玉[1] 李丽 周庆捷 

机构地区：[1]华北电力大学,河北保定071003 [2]北京中恒博瑞数字电力科技有限公司,北京100096

出　　处：《内蒙古电力技术》2012年第2期25-28,共4页Inner Mongolia Electric Power

摘　　要：在光伏发电站接入配电网后,为方便配电网继电保护的整定计算,借鉴动态等值阻抗的建模方法,将光伏发电站表示为戴维南等效电路,即一个恒定的电压源和其等值阻抗串联的形式,计算光伏发电站的最小正序等值阻抗。并且在参考日照强度S=1000W/m2、参考电池温度T=70℃条件下进行4组实验,对不同类型的光伏电池进行实测,与该数学模型的计算结果进行对比。结果表明,采用该模型的计算误差在5%以内,能够满足工程中继电保护整定计算的需要,验证了该计算方法的实用性。After photovoltaic station connected to distribution network, for convenience of distribution grid relay protection setting calculation, use dynamic equivalent impedance modeling method to express photovoltaic power station as the Thevenin＇s theorem, that is to calculate the minimum positive sequence impedance of photovohaic power stationwith a constant voltage source and its equivalent impedance in series form. Four sets of experiments are carried out under referenced intensity of 1000 W/m^2 and referenced cell temperature of 70 ℃. Different types of PV cells are measured and comparison with the result of calculation by less than 5% with this mathematical mode is calculation model. It setting calculation and the method is validated made, which shows tthe calculation error is can meet the requirement of relay protection practicability.

关 键 词：光伏发电 配电网 继电保护 整定计算 数学模型 等值阻抗 

分 类 号：TM77[电气工程—电力系统及自动化]