电力系统静态电压稳定极限的分区求解算法

提出一种适用于大规模电力系统电压稳定分析的分区并行连续潮流算法，求取静态电压的稳定极限。首先将电力网络划分成由联络线联系起来的若干个子网，子网内部母线的关联性强而与外部网络仅通过少数联络线相连；以子网为收缩节点、联络线为支路构造浓缩网络。进行计算时，通过前向简化形成预估环节的接口方程，同时以浓缩网络的电压为控制电压向量求出控制步长；校正环节通过双向迭代方法交替实现对浓缩网络和收缩节点的牛顿法线性增量方程的求解。对新英格兰系统和我国东北电网的仿真测试结果验证了该方法的可行性。

A New Calculation Method for Static Voltage Stability Limit of Large-Scale Power System

A new parallel algorithm of continuation power flow for large-scale power system is proposed,it helps to obtain the static voltage stability limit. In this approach the whole power network is divided into several subnets connected by a spot of tie lines,the relevance of internal buses in subnets is strong. During the calculation a concentrated computational grid can be constructed by subsets as contracted nodes and the tie lines as branches. In the predicted process,the forward simplification is used to get the interface equation,meanwhile taking the voltage of the concentrated grid as control vector to solve the control step length; in the correction process,by means of forward simplification and back substitution the Newton linearization incremental equations of both concentrated computational grid and contracted nodes are solved alternately. The feasibility of the proposed approach is validated by simulative test results of New England test system and Northeast power grid in China.