含静止同步串联补偿器的电力系统电压稳定性奇异值分析法及指标计算

提出了一种静止同步串联补偿器(static synchronous series compensator，SSSC)混合模型，推导了电力系统中加入SSSC模型后的潮流方程。在潮流计算和奇异值分解的基础上，构建了基于SSSC混合模型和奇异值分解的电压稳定性弱节点判别指标及最危险负荷增长方式指标。利用奇异值分析法，深入分析了在负荷平均增长和最灵敏节点负荷增长2种情况下，SSSC对电力系统电压稳定性的影响。研究了采用弱节点判别指标和最危险负荷增长方式指标确定系统最薄弱节点和负荷增长最快节点的方式。证明了在系统最薄弱节点和负荷增长最灵敏节点线路中加入SSSC后能提高电力系统电压稳定性。对IEEE14节点系统进行了仿真计算，验证了所构建的SSSC混合模型以及2个电源稳定性分析指标的可行性、有效性和适用性。

Singular Value Calculation Methods for Voltage Stability and Index Calculation of Power System With Static Synchronous Series Compensators

The authors propose a hybrid power injection model of static synchronous series compensator (SSSC) for power flow and voltage stability analysis, and derive the power flow equation after the SSSC model is added to power system. On the basis of power flow calculation and singular value decomposition, the index to judge the nodes with weak voltage stability based on the hybrid SSSC model and singular value decomposition is constructed. By use of singular value analysis the impacts of SSSC on power system voltage stability under average growth of power load and load growth at the most sensitive nodes are analyzed in depth. The way to judge the weakest node in power system and the node with the fastest load growth is researched by use of the index to judge weak node and the index of most dangerous load growth mode. It is proved that adding SSSC to the weakest node and the node with the fastest load growth can enhance power system voltage stability. The feasibility, effectiveness and applicability of the constructed hybrid SSSC model and the two power source stability analysis indices are validated by simulative calculation results of IEEE 14-bus test system.