Real Load And The Transformer Error Measuring Device For Automatically

As the power industry develops, electric power measuring is being paid more and more attention because it is closely connected with the profit of the business and it also directly affects the charging for electric power. Therefore, it is very urgent to improve the accuracy of power measuring.The topic of this paper arises out of the measuring error of transformers in their practical application in the power system.As present, simulation load instead of real load is adopted to measure the errors of transformer. In this way, it can only show whether the transformer is qualified within the range of the specified loads and can not reflect the real errors of the transformer in its practical working conditions. By comparison, the automatic measuring equipment mentioned in this thesis can successfully solve the problem mentioned above.The automatic real load error measuring equipment is divided into two parts: the one is a chip microprocessor controller which is the core of the measuring equipment and which controls and manages the whole system; the other is controller case. It accepts orders of the chip microprocessor controller and functions as the performing system. The controller case includes stepping motor, self-coupling voltage regulator, alternating-current contactor, relay and micro-transformer. The above-mentioned equipment together with a transformer correction instrument forms the measuring system which carries out measuring tasks at testing site of transformers.The subject of the paper is listed as one of the research items of the Northeast Electric Power Corporation.