ABSTRACT
With the rapid development of electric power industry, electric power system, as an increasingly large scale and complicated power system fault, The user will give power plants and power equipment of the security threats, and may have caused the accident of power system, technology and safety considerations from directly power test possibility, urged using electric simulation to solve these problems based on grid power supply system, Therefore, paper depend on the model of dynamic simulation by MATLAB build software Simulink infinite power system of single - simulation model, the grid in various fault may meet the needs of the running of aspects.
The paper base on platform version of Matlab R2009a，According to SimPowerSyetem toolbox to build power operation of common single—infinite system model, the experiment in the system was obtained by various circuit breaker automatically earthing faults and fault isolation of simulation results trip. Using the wavelet analysis and has strong ability of the signal feature extraction, especially for transient mutations signals or weak signal processing showed obvious advantages, Reaching purpose of the simulation.
The main work is :
(1) Building this simulation system of single - infinite under Simulink
(2) Fault simulation test analysis of system
(3) Fault detection and analysis based on Haar wavelet
Through examples, if this method to the power system fault diagnosis, fast fault detection and diagnosis, automatic for improving the stability of power system has important significance.
