【标题】直流换相失败导致交流联络线功率波动的峰值计算方法

【Title】PEAK VALUE CALCULATION METHOD FOR AC TIE-LINE POWER FLUCTUATION DUE TO DC COMMUTATION FAIL

【摘要】直流换相失败造成的短时功率扰动将会引发交流联络线功率波动。本文提出短时功率扰动的动态过程可等效为2阶线性系统的方波扰动，基于2阶线性系统时域分析理论，阐明短时功率扰动扰动下联络线功率波动的机理，提出联络线功率波动峰值以及功率转移比的计算方法。通过“三华”电网仿真分析和实际系统机组功率扰动事故验证提出的模型、机理和算法的正确性和有效性。研究结论有助于掌握互联电力系统联络线功率波动的动态特性，为互联电力系统的运行方式安排和控制措施的确定提供依据。

【Abstract】Short-term power disturbance such as HVDC commutation failure produces power fluctuation on AC tie-line. The method that the short-term power disturbance can be equivalent to square wave disturb on a two-order linear model systems was presented. Based on time domain analysis theory of second order linear system, the mechanism of power fluctuation after short-term power disturbance on tie-line was clarified. Algorithms for determining the peak value of power fluctuation and the power transfer ratio on tie-line after short-term power disturbance were proposed. Finally, the correctness and effectiveness of the algorithms were verified by comparing simulation results of commutation failure of multiple  DC  lines  in  Huabei-Huadong-Huazhong interconnected power system and analyzing an abnormal operation of generation unit in practical power system. The conclusions are helpful for operators and engineers to master dynamic characteristics of power fluctuation on AC tie-line of two-area interconnected power systems. It provides scientific basis for arranging operating schemes and control measures of interconnected power systems. 

【关键词】互联电力系统；联络线；换相失败；短时功率 扰动；功率波动

【Keywords】interconnected power system; tie-line; commutation failure; short-term power disturbance; power fluctuation

【作者】

林伟芳	：中国电力科学研究院，北京市海淀区 100192；
屠竞哲	：中国电力科学研究院，北京市海淀区 100192；
易俊	：中国电力科学研究院，北京市海淀区 100192；
张健	：中国电力科学研究院，北京市海淀区 100192；
徐式蕴	：中国电力科学研究院，北京市海淀区 100192；

【Author】

LIN Weifang	: China Electric Power Research Institute, Haidian District, Beijing 100192, China;
YI Jun	: China Electric Power Research Institute, Haidian District, Beijing 100192, China;
ZHANG Jian	: China Electric Power Research Institute, Haidian District, Beijing 100192, China;
TANG Yong	: China Electric Power Research Institute, Haidian District, Beijing 100192, China;

【来源】2016年中国电机工程学会年会论文集

【出版时间】2016年 11月15日