基于TLS-ESPRIT辨识的多直流控制敏感点研究  

Analysis on controllability sensitive points of multi-HVDC systems based on TLS-ESPRIT method

作　　者：王曦[1] 李兴源[1] 王渝红[1] 赵睿[1] 

机构地区：[1]四川大学电气信息学院,四川成都610065

出　　处：《电力系统保护与控制》2012年第19期121-125,共5页Power System Protection and Control

基　　金：国家自然科学基金重点项目(51037003);四川省科技厅基础应用计划项目(2010jy0018);四川省电力公司科技项目~~

摘　　要：多直流输电系统的出现及发展,使得通过直流附加控制抑制低频振荡的方法更加复杂也更加灵活,附加直流控制地点选择与振荡抑制效果息息相关,可定义低频振荡控制敏感点为附加控制器对系统不同振荡模态的最佳安装位置。提出了通过TLS-ESPRIT方法辨识各直流扰动情况下发电机加权功角曲线,得到振荡模态对应于各条直流的多直流控制因子,通过多直流控制因子确定振荡模态的控制敏感点,附加控制器的参数通过综合性能指标进行整定,在控制敏感点附加直流调制将获得最优的控制效果。以川渝电网振荡模态为算例对四川电网多直流输电系统进行了仿真验证,结果表明了控制敏感点的准确性。With the development of multi-HVDC system, the complementary controllers for HVDC transmission systems used to suppress the power system low-frequency oscillation become more complex and flexible. The result of suppression is bound up with the place to locate controllers in multi-HVDC systems. Controllability sensitive points can be defined as the best place to locate controllers in different oscillation modes. The weighted angle curve is identified under the perturbation of each DC transmission line by TLS-ESPRIT identification, then multi-HVDC control factor is calculated to find out the controllability sensitive points, and parameters are adjusted by comprehensive performance index. DC modulation on controllability sensitive points has the best performance in suppressing the oscillation compared with modulation on other DC lines. Sichuan-Chongqing oscillation mode is taken as an example to illustrate the controllability sensitive points of Sichuan multi-HVDC transmission system. The result illustrates the accuracy of controllability sensitive points.

关 键 词：TLS-ESPRIT 多直流控制因子 控制敏感点 直流调制 综合性能指标 

分 类 号：TM712[电气工程—电力系统及自动化]