Mpi-based Pq Method Of Flow Calculation And Transient Stability Parallel Study

Power system is a complex nonlinear time-varying system.With the expansion of the system scale and the rising requirement of on-line analysis, traditional analysis methods have been unprecedented challenged. The solution to power system calculation is usually a group of algebraic equations or algebraic equations in conjunction with the differentia] equations. In order to speed up the computation, parallel processing technology is introduced into the power system analysis computing field. It provides an effective way to fundamentally solve the problem of the power system real-time analysis.This dissertation introduces the basic theory of the parallel computing and parallel algorithm, and also introduces MPI and parallel programming based on MPI. Aiming at the quick solution to the power flow computing, a dimensional parallel way is proposed based on Message Passing Interface and P-Q decoupled power flow calculation. This parallel approach is based on the matrix inversion. In order to enhance parallel degree, another parallel approach is proposed accordingly.It focuses on the formation of the coefficient matrix and the solving of the equations using the factorization tables. This designed approach is based on the Gaussian elimination parallel algorithm. The parallel algorithm is evaluated on a series of test power systems. Test results show that the parallel algorithm can greatly reduce the computer running time and get great speedup factor and efficiency.The analysis of the power system transient stability problem is relatively much more complex. This dissertation analyses the mathematical models of the main power system components including generators, load and power network. Dealing with the faults or operations in the process of the transient stability calculation, an approach of fault handling is proposed which based on the decomposition of the broken-down lines. Taking the asymmetry of the faults into account, a network model is built in the form of three sequence admittance matrix. Then this dissertation carries out the transient stability calculation process analysis and algorithm design based on the simplified model. In order to speed up the computation, using the parallel algorithm design experiences in power flow calculation, a dimensional parallel approach is designed based on the solving of algebraic equations in conjunction with the differential equations.