GPS synchronous time service-based substation transformer secondary polarity detection method

Abstract

The invention provides a GPS synchronous time service-based substation transformer secondary polarity detection method. The method is implemented by primary-side equipment and secondary-side equipment. The primary-side equipment comprises a first MCU module, an excitation output module, a first sampling module, a first GPS clock module and a first wireless communication module, wherein the excitation output module, the first sampling module, the first GPS clock module and the first wireless communication module are respectively connected to the first MCU module. the secondary-side equipment comprises a second MCU module, a second sampling module, a second GPS clock module, a second wireless communication module and a liquid crystal touch screen, wherein the second sampling module, the second GPS clock module, the second wireless communication module and the liquid crystal touch screen are respectively connected to the second MCU module. The detection method comprises the steps of 1, connecting equipment; 2, starting and initializing a system; 3, synchronously sampling the startup time and setting the sampling frequency; 4, synchronously sampling; 5, processing sampled signals; 6, judging the secondary polarity; 7, displaying a result. The above method is convenient to operate, good in safety and high in detection accuracy, which can greatly improve the working efficiency.

Description

technical field [0001] The invention relates to the field of transformer substation maintenance, in particular to a method for detecting the secondary polarity of a transformer by using GPS synchronous timing before the transformer substation is put into operation. Background technique [0002] In the substation, the transformer converts the high voltage and high current of the primary side into a small voltage and low current suitable for the secondary equipment, and is the link between the primary equipment and the secondary equipment of the substation. Whether the transformer secondary circuit is correct or not is related to the normal operation of the entire secondary system, which in turn affects the safety and stability of the entire substation. Before a new substation or a replaced transformer is put into operation, the secondary circuit of the transformer needs to be tested to prevent secondary polarity wiring errors from causing damage to the transformer and malfunc...

AI Technical Summary

Problems solved by technology

However, the primary side of transformer transformers in substations is often set outside the substation, while the secondary side is set inside the substation room. During the test, the testing personnel stationed on the primary side must coordinate with the testing personnel on the secondary side to complete the entire testing process, resulting in low work efficiency. , the operation is cumbersome, and the safety hazard is relatively large

In addition, there are many transformers in the substation, and the detection workload using the "point-pole method" is relatively large, and the testing process lacks systematicness and integrity, which makes it difficult to meet the requirements of large-scale substation testing

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