正反馈反孤岛控制对光伏系统小信号稳定性影响  

IMPACT OF POSITIVE-FEEDBACK ANTI-ISLANDING CONTROL ON STABILITY OF PV SYSTEM

作　　者：张兴[1] 谢东[1] 李善寿[1] 赵为[2] 汤婷婷[1] 

机构地区：[1]合肥工业大学电气与自动化工程学院,合肥230009 [2]阳光电源股份有限公司,合肥230088

出　　处：《太阳能学报》2013年第5期774-779,共6页Acta Energiae Solaris Sinica

基　　金：国家重点基础研究发展(973)计划(2009CB219702)

摘　　要：在建立光伏并网发电系统小信号模型的基础上,以P-K曲线为工具,分析了带有正反馈反孤岛控制时影响系统稳定性的主要因素。分析结果表明,孤岛检测算法的正反馈增益K、电网连接线路阻抗、负载阻值及品质因素等都是影响系统稳定性的因素。分析结果为光伏并网发电系统反孤岛控制参数设计提供了有益参考。The function of islanding detection is required for the grid-connected photovohaic power system, and usually an islanding detection algorithm with positive-feedback perturbation is adopted. The positive-feedback anti- islanding control of photovohaic power system will impact the system stability. On the basis of small signal model of grid-connected photovohaic power system, and considering the positive-feedback anti-islanding control, the factors that affect the system stability were analysed with P-K curve as a tool. The results .of analysis illustrated that positive-feedback gain of islanding detection algorithm, line impedance, resistance and quality factor of load are all the impact factors on system stability. The conclusion provides a reference for the parameter design of PV system anti-islanding control.

关 键 词：光伏发电系统 孤岛检测 小信号模型 稳定性 P-K曲线 

分 类 号：TM93[电气工程—电力电子与电力传动] TM615