Allocation Methodology of Multiple SVCs Considering Operation Scheme Changing

针对多静止同步补偿器（staticvarcompensator，SVC）对系统共同影响的问题，提出计及运行方式变化的多SVC布点方法。利用规范形分析，基于摄动方程2阶解析解信息建立拓展静态电压稳定边界的多SVC布点分析方法。首先根据静态电压稳定分析方法，确定系统危险运行方式（即距离系统电压崩溃最近的运行方式1；然后在该运行方式下，利用规范形方法对系统进行小扰动电压稳定分析，求出所有负荷节点的电压振荡曲线解析解；最后利用2阶解析解所给出的小扰动1阶振荡幅值和2阶振荡幅值信息，以多SVC布点多种方案对系统降低小扰动幅值的贡献为指标，给出多SVC布点结果。所提方法应用于IEEE30节点系统，试验结果表明，该方法相对于不考虑多点共同影响的多SVC布点方式，其静态电压稳定边界的拓展效果更好。

Static var compensator （SVC） devices can effectively prevent the voltage collapse of a power system, because of its characteristics of quickness and flexibility. Since the model analysis using the Jpo in the Jacobi submatrix considers the effects on voltage stability of both active load and reactive load, it is superior to the V-Q sensitivity analysis in terms of mathematical theory. Furthermore, the participation factor figure by virtue of the modal analysis method is able to establish the relationship among nodes of network topology and improve the influence degree of the crisis modal, and therefore the modal analysis is widely used in the allocation of SVCs. In the recently years, many researchers have tried to build the second order analysis method of modal analysis.