考虑风速特性的动态电压崩溃指标  

Dynamic voltage collapse index with wind speed considering

作　　者：马瑞[1] 周志飞[1] 徐慧明[2] 徐晓东 

机构地区：[1]长沙理工大学电气与信息工程学院,湖南长沙410004 [2]国网信息通信有限公司,北京100761 [3]甘肃省秦安县电力局,甘肃秦安741600

出　　处：《电力科学与技术学报》2009年第2期41-46,共6页Journal of Electric Power Science And Technology

基　　金：湖南省教育厅优秀青年基金(06B007);电力系统及发电设备安全与仿真控制国家重点实验室开放基金(GZH(2008)07)

摘　　要：基于四分法划分的风速模型和简化风力发电系统传输线路模型,考虑3阶双馈异步风力发电机的转差率和风电机注入系统功率的随机性,推导出电压崩溃指标.根据指标测量值与临界值之间的距离判定系统接近电压崩溃的程度;投入SVC补偿可提高该指标,即提高系统电压崩溃的预防能力.最后以配电网系统中接入单台风力发电机为例,基于MATLAB的Simulink对风速、滑差和动态电压崩溃指标进行仿真,仿真结果验证了该指标的有效性和实用性.Based on the quarter wind speed model and the simplified wind power transmission line model, the dynamic voltage collapse index is deduced with the slip ratio of 3-order doubly-fed induction wind turbines and the random power of wind turbines injecting into power systems considered in this paper. The degree of power system close to voltage collapse is calculated with the magnitude between the local measuring index value and the critical value. After SVC connecting, the wind power system index value and the voltage stability can increase. At last, a distribution network system with a single wind generator is simulated using the Simulink model of MATLAB. The wind speed, slip ratio and dynamic voltage collapse index are calculated. Simulation results show that the index is with validity and practicability.

关 键 词：风力发电系统 动态电压崩溃指标 相量测量单元 四分法风速 

分 类 号：TM614[电气工程—电力系统及自动化] TM712