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.
出处
《太阳能学报》
EI
CAS
CSCD
北大核心
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)
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
photovoltaic power system
islanding detection
small signal model
stability
P-K curve
