Study Of Fast Calculation Method Of Power Network Topology Changing

The paper studies fast calculation and correct methods in admittance matrixes modify program, in view of the requirement of dynamic calculation. Using C++ language, constructs an admittance matrix modify program. According to the real condition, build up a series fault model in power network and work out a better power network fault simulation system. Base on the classic simplified methods of admittance calculation, a series of methods are used in the program to reduce the program. Base on the dynamic date structure list and the matrix reducing method, develops a method to modify admittance matrixes used in power system dynamic simulation and sets up a series of son functions to increase or obliterate the elementary of the admittance matrixes. This method can reduce operation, and increased the calculation speed effectively.