双馈风电场感应发电机效应的风险区域变化机理  

Evolving Mechanism of Risk Region for Induction Generator Effect of Doubly-Fed Wind Farms

作　　者：陈武晖[1] 宿端鹏 汪旎[1] 孙欣[1] 于焰均[1] 

机构地区：[1]江苏大学电气信息工程学院,江苏省镇江市212013

出　　处：《中国电机工程学报》2016年第20期5469-5478,5723,共10页Proceedings of the CSEE

基　　金：国家自然科学基金项目(51277089)~~

摘　　要：揭示了双馈风电场等效电阻随着双馈风力发电机转速和系统自然谐振频率变化的规律,提出应用等效电阻分析双馈风电场感应发电机效应危险区域的一种新方法。分析结果显示,双馈风力发电机感应发电机效应的危险区域在系统自然谐振频率对应转速的右侧区域附近。而且,随着串补度升高,系统自然谐振频率增大,双馈风力发电机感应发电机效应的危险区域向高风速区域移动。同时,随着串补度的增大,等效电阻的最小值也进一步减小,感应发电机效应更加剧烈。最后,在PSCAD仿真平台搭建了随机风速下整个运行区域的双馈风电场模型,用时域仿真法和Prony算法验证了上述分析结果的合理性。This paper revealed the rule that the equivalent resistance varies with the rotor speed of doubly-fed generators and the system natural resonant frequencies. A new method was developed for investigating the induction generator effect of doubly-fed wind farms using the equivalent resistance. The analysis results show that the risk region for the induction generator effect of doubly-fed generators is located on the right region of the rotor speed of doubly-fed generators corresponding to the system natural resonant frequencies. Furthermore, the risk region for the induction generator effect of doubly-fed generators moves to the higher wind speed regions with the increase of the series compensation level. Meanwhile, the induction generator effect gets more and more severe when the minimum of the equivalent resistance of the system decreases with the increase of the series compensation level. Finally, the doubly-fed wind farm operating in the whole region for wind speed was modeled on the PSCAD platform. The time-domain simulation and Prony analysis validate the proposed conclusions.

关 键 词：次同步谐振 感应发电机效应 次同步控制失稳 双馈风电场 等效电阻 

分 类 号：TM71[电气工程—电力系统及自动化]