In order to realize the investigation of protection relaying simulation in power system
we had developed a protection relaying simulation system based on MATLAB. The system consists of system graph constructing module
power flow calculating module
short-circuit calculating module
fault simulation module and protection simulation interface module. Any simulation system module can be constructed by the system
which can deal with transient calculation to process accident prediction
accident replaying and setting investigating. The system has been proven to be an available and efficient method of protection relaying transient measurement. Keyword: checking protection ;transient simulation ;MATLAB