Transformer on-load switch testing system and method

The invention relates to a transformer on-load switch testing system and method. The system comprises an upper computer and a lower computer. The upper computer comprises a test interface module, a query module, a storage module, a data processing module, and an upper computer USB module. The lower computer comprises an ARM processor, a lower computer USB module, a power supply module, a memory, an LCD display, a keyboard, a signal processing circuit, a sensor access module, a synchronous dynamic random access memory, and a NorFlash. According to the method, the tests of the upper computer and the lower computer are employed, the lower computer can communicate with the upper computer through the lower computer USB module, the upper computer and the lower computer carry out analysis processing and displaying on a signal so as to judge the performance of a high voltage switch, and the normal operation of a grid is protected. The transformer on-load switch testing system and method have the advantages of a reasonable conception and simple and fast testing, through the simultaneous comparison of a DC waveform and an AC wave form and mutual reference, a more accurate testing result is given, and the testing result is more comprehensive.