基于网络分割的电力系统潮流分解协调计算

Decomposition and Coordination Power Flow Calculation Using Network Partition

因现有计算模式的速度已无法满足现代大规模电力系统实时计算的要求,故引入对等计算(P2P)模式以提供低廉而充足的计算力。为此研究了网络计算环境下的电力系统潮流计算模型,结合基于支路切割的网络分割方法和基于注入电流的潮流模型,提出了基于网络分割的电力系统潮流分解协调算法,将大规模互联电力系统分解成若干子网络,子网络间只需交换边界母线的电压状态就可完成分布式潮流计算,保证各个子网络潮流计算模型的独立性。对IEEE标准系统进行潮流计算的结果表明该法具有较高的收敛速度和计算精度,适合网络计算环境。

The network computation is applied to power system computiaton and simulation and tries to solve the complicated and real time computation of large-scale power system. P2P computing is one of network computing modes, which can provide sufficient computing capacity with low cost to meet the needs of real time computing. A novel distributed power flow calculation model based on network computing is studied, and a decomposition and coordination algorithm for distributed power flow calculation based on network partition and current injection is presented. When a large-scale interconnected power system is decomposed, each subsystem can accomplish power flow calculation respectively, and it is very fit for distributed computing in network computing environment. Each subsystem only needs to exchange the voltage states of boundary buses with others to calculate the current injections of boundary nodes before the iterations every time, and then the power flow calculation of entire power system can be accomplished together. Test results of IEEE standard systems show that the proposed algorithm is of fast convergence rate and high precision, which makes the algorithm feasible in network computing environment.