分解协调式节点阻抗矩阵生成算法的并行实现

Parallel Implementation of Node-Impedance Matrix Generation Algorithm Based on Decomposition and Coordination

将互联大电网以节点撕裂方式分解为相互无电磁联系的独立子网,各子网通过撕裂节点间的虚拟断路器桥接。在各子网并行求得独立节点阻抗矩阵后,采用分解协调法来计及各子网的电磁联系,并利用大变化灵敏度理论修正各子网的独立节点阻抗矩阵,从而得到整个电网的节点阻抗矩阵。最后,通过仿真实验验证了该并行算法的有效性和正确性。

Fast generation and modification of node- impedance matrix are significant to real-time computation of power systems and the latter is the premise to implement online setting of protective relayings. After splitting an interconnected large-scale power grid into independent subnetworks by node-tearing and among them there is no mutual electromagnetic coupling, all subnetworks are connected via virtual circuit breakers among torn nodes. When independent impedance matrices of all subnetworks are parallelly attained, the electromagnetic influences among subnetworks are taken into account by decomposition-coordination method, and the independent node-impedence matrix of each subnetwork is modified by large change sensitivity theory to obtain node-impedance matrix of whold interconnected large-scale power grid. Simulation results show that the proposed parallel algorithm is correct and effective.