计及可控串联补偿器的系统电压失稳概率研究  

Study of System Voltage Instability Probability Considering Thyristor Controlled Series Compensator

作　　者：任曦骏 严正[1] 赵建伟[1] 曹路[2] 李建华[2] 

机构地区：[1]上海交通大学电力传输与功率变换控制教育部重点实验室,上海200240 [2]华东电网有限公司,上海200120

出　　处：《水电能源科学》2015年第8期170-173,共4页Water Resources and Power

摘　　要：可控串联补偿器(TCSC)可以灵活地调节线路潮流,提高系统运行的稳定性,传统分析方法在评估TCSC提高系统静态电压稳定性作用时存在缺陷,无法考虑不确定性因素的影响。因此,建立计及TCSC接入的系统负荷裕度概率模型,考虑运行参数的随机波动,通过半不变量法和Gram-Charlier级数计算负荷裕度概率特征,进而得到电压失稳概率值。分别在常态与故障下对比TCSC安装前后的IEEE39节点系统失稳概率,结果表明,TCSC能有效地提高系统的静态电压稳定性,验证了本文方法的可行性与准确性。Thyristor controlled series compensator（TCSC）can adjust line power flow flexibly and improve the stability of system operation.The defects of traditional analysis method which is used to evaluate the static voltage stability improvement with TCSC come out that it can not consider the impact of uncertain factors.Aiming at the problem,the system load margin probabilistic model with TCSC installation is established by considering the stochastic volatility of operation parameters.The load margin probabilistic character is calculated by using cumulant method and Gram-Charlier progression.And then the value of voltage instability probability is obtained.Under the normal and fault conditions,the values before and after TCSC installation are compared respectively.The results indicate that the TCSC can improve system static voltage stability availably.The feasibility and correctness of the proposed method is validated by the simulation of IEEE-39 bus system.

关 键 词：可控串联补偿器 不确定性因素 负荷裕度 电压稳定 失稳概率 

分 类 号：TM71[电气工程—电力系统及自动化]