摘要
针对高压微电网或等效线路阻抗呈感性的低压微电网,提出孤岛运行模式下的一种线路阻抗参数在线辨识方法。通过Park变换将电压、电流变换到两相同步旋转坐标系下,利用电压、电流的直流分量求解线路阻抗,从而识别出线路电阻值和电感值。该方法不仅适用于三相平衡系统,更可在三相负荷不平衡情况下,实现对输电线路阻抗参数的在线辨识。仿真和实验中,将提出的Park变换法与Karrenbauer相模变换法进行对比,结果表明所提出的Park变换法易于编程且辨识精度较高。
Aiming at high voltage microgrid,or low voltage microgrid with equivalent inductive line impedance,theonline identification method of line impedance parameter in islanding operation mode was proposed. The voltage andcurrent were transformed into two-phase synchronous rotating coordinate system through the Park transformation,DCcomponents of voltage and current were used to get line impedance for identifying the line resistance value andinductance value. The proposed method not only is suitable to three-phase balance system,but also can realize onlineidentification of transmission line impedance parameters under three-phase unbalanced load condition.In simulationand experiment,the Park transformation method was compared with Karrenbauer phase-mode transformation method,the results show that the proposed Park transformation method is easier to program and has higher identification accuracy.
作者
盖宝
潘再平
Gai Bao;Pan Zaiping(College of Electrical Engineering, Zhejiang University, Hangzhou 310027, China)
出处
《太阳能学报》
EI
CAS
CSCD
北大核心
2018年第6期1735-1742,共8页
Acta Energiae Solaris Sinica
基金
国家高技术研究发展(863)计划(2011AA050204)
