Calculation and Analysis of Large Current Switching Test of On-load Tap-changer

2022 IEEE 2nd International Conference on Data Science and Computer Application (ICDSCA) Pub Date : 2022-10-28 DOI:10.1109/ICDSCA56264.2022.9988139

Haibin Zhou, Zhicheng Xie, Xing-ran Chen

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Abstract

The On-load Tap-changer of the converter transformer operates frequently and the operating condition is bad, which requires extremely high breaking capacity and long-term reliability. Large current switching test is a key test to evaluate the breaking performance of On-load Tap-changer. However, there are few quantitative studies on the changes of electrical parameters and test equivalence during the test. This research is based on the large current switching test of On-load Tap-changer using resonance method. Firstly, the variation law of the electrical quantities in the test system under each action stage of the On-load Tap-changer is calculated by using the equivalent transformation of the electrical topology. Then, the deviation between the current and voltage in the test circuit and the current and voltage of the On-load Tap-changer under actual operation state is calculated, and the test equivalence and influencing factors are analyzed. Finally, the correctness of the calculation and analysis is verified by the actual large current switching test waveform of an On-load Tap-changer, and the suggestions for large current switching test are given.

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有载分接开关大电流开关试验计算与分析

换流变压器有载分接开关运行频繁，工况较差，对分断能力和长期可靠性要求极高。大电流分接试验是评价有载分接开关分断性能的一项关键试验。然而，对试验过程中电气参数变化及试验等效性的定量研究较少。本研究是基于谐振法对有载分接开关进行的大电流开关试验。首先，利用电拓扑的等效变换，计算了有载分接开关各动作阶段下测试系统中电量的变化规律;然后，计算了测试电路中的电流和电压与有载分接开关在实际工作状态下的电流和电压的偏差，并分析了测试等效性和影响因素。最后，通过有载分接开关的实际大电流开关试验波形验证了计算分析的正确性，并给出了大电流开关试验的建议。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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2022 IEEE 2nd International Conference on Data Science and Computer Application (ICDSCA)

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