交直流控制措施改善频率安全的差异及评价指标  

Research on the Difference Mechanism and Evaluation Indices of ACDC Control Measures for Improving Frequency Safety

作　　者：李威[1] 陈涛[2] 冯丽[2] 吕亚洲[1] 刘福锁[1] 任先成[1] 摆世彬[3] 丁茂生[3] 项丽[3] 

机构地区：[1]国电南瑞科技股份有限公司,江苏南京211000 [2]国网重庆市电力公司,重庆400014 [3]国网宁夏电力公司,宁夏银川750001

出　　处：《中国电力》2015年第11期54-59,共6页Electric Power

基　　金：国家电网公司科技项目(适应智能化发展需求的电网安全和充裕控制技术研究与应用);国家电网公司大电网重大专项(SGCC-MPLG003-2012);宁夏电力公司科技项目(新能源送出控制保护关键技术研究与示范)~~

摘　　要：利用传统的控制灵敏度指标,可较好地指导下一步策略的优化,实现优化控制,避免控制措施负效应,但要获得每个控制措施的灵敏度,都要经过摄动计算,不满足在线快速决策的要求。从控制措施正反面作用角度,解释了不同控制措施对改善频率安全性灵敏度不同的机理,给出了频率安全控制措施实效量概念及其计算方法。提出了切机、切负荷及直流调制等措施对频率安全控制效果的快速评价指标,通过一次仿真获得所有候选控制措施的控制性能。基于实际电网仿真表明,该指标能取得与数值摄动法近似的灵敏度,大大减少了计算量,可以有效提高搜索效率并能够找到工程意义上的优化控制策略。The traditional control sensitivity index could be a good measure to optimize the next direction of searching control strategy and avoid the negative effect. But the perturbation calculation is needed to obtain the sensitivity of each control measure, which would not be suitable for rapid online decision-making requirements. In this paper, from the standpoint of positive and negative effect of control measures, the mechanism of improving frequency safety sensitivity of various control measures is expounded. The conception and calculation method of the actual effect of frequency safety control is proposed. The fast evaluation indices of generator tripping and load shedding and HVDC modulation is also proposed, which could obtain the performance parameters of all control measures from one simulation. Actual power system simulation indicates that these evaluation indices have similar control sensitivity of the perturbation calculation and can significantly reduce the calculation quantity of simulation and improve the strategy searching efficiency for seeking out the practical optimal control strategy.

关 键 词：频率安全 量化分析 灵敏度 评价指标 负效应 控制措施实效量 

分 类 号：TM732[电气工程—电力系统及自动化]