Decomposition and Coordination Power Flow Calculation Using Network Partition

A large-scale interconnected power system of high voltages in China is being formed.In such a large-scale power system,dealing with security and stability analysis,economical operation,and real time control has become an extremely complicated computation issue,which needs the real time or super real time computation to form the accurate control strategies.The present serial and parallel computing modes do not meet the current requirements.In this paper,the network computing is applied to power system computing and simulating,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 need 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.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.