Construction Method of Partial Discharge Analog Signal Based on MATLAB

Gas Insulated Switchgear (GIS), that is very significant to the stability of the whole power grid, has been widely used in Ultra High Voltage (UHV) power system. In order to truly reflect the function of the Ultra High Frequency (UHF) on-line monitoring device, the test pulse signal used for the inspecting device needs to be as realistic as possible. However, the real partial discharge (PD) pulse is difficult to obtain, and the parameters of pulse cannot be adjusted, which brings difficulties to the device inspection. In this paper a UHF PD analog signal generation system based on MATLAB is developed, the system composition, operation principle and application example are introduced. The application test shows that the PD pulse sequence generated by the simulation system is basically the same as the real PD pulse, and the output pulse amplitude, phase, time interval and other parameters can be adjusted as needed.