Transformer on-load switch testing system and method

Abstract

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.

Description

technical field

[0001] The invention relates to a testing method, in particular to a transformer on-load switch testing system and method. Background technique

[0002] At present, the test methods for testing the characteristics of transformer on-load tap-changers are:

[0003] 1) DC test method: The advantage of the DC test method is that it can measure specific parameters such as the excess resistance and excess time of the transformer on-load tap-changer, and can be compared with the nameplate data according to the obtained parameters, as an important basis for testing. The disadvantage is that during the test of the DC source, it is vulnerable to the impact of the transformer winding or the DC voltage is too low to break through the oil film, which leads to the short-term interruption of the constant current source, so as to determine whether the transformer is in poor contact during the switching process of the transformer on-load tap changer, etc. It is difficult to ...

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