李江,郭苏瑢,刘博
LI Jiang,GUO Surong,LIU Bo

• 1:上海电力大学电气工程学院

摘要(Abstract)：

配电变压器有载分接开关在切换过程中触头处易产生电弧，影响设备使用寿命和正常运行。为此，在分析现有有载分接开关优缺点的基础上，结合电弧产生原理，提出在切换开关闭合前提供“零电压”条件的设计思路，设计出一种受控源装置。该装置中引入带有飞轮转子的飞轮电机，利用其快速响应特性，根据切换开关两端的电压变化控制受控源输出，将切换开关两端电压控制为零，实现有载分接开关在“零电压”条件下的闭合，从而削弱开关切换产生的电弧。在PSCAD软件中搭建加入受控源的有载调压装置模型进行仿真，验证了所提方案对控制切换开关两端电压及抑制切换过程中电弧产生的有效性。
In the switching process of on-load tap changers(OLTCs) for distribution transformers, electric arcs are likely to occur at the contacts, which have an adverse impact on the service life and normal operation of the equipment. Therefore, based on an analysis of the merits and demerits of existing OLTCs and the principle of arc generation, this paper presents a design concept of creating a “zero voltage” condition prior to the closure of the switching device. A controlled-source device is then designed, integrating a flywheel motor equipped with a flywheel rotor. Leveraging its rapid response characteristics, the output of the controlled source is modulated in accordance with the voltage changes across the OLTC, thereby reducing the voltage across the switching device to zero. This enables the OLTC to close under the “zero voltage” condition, effectively weakening the electric arcs generated during the switching process. A simulation model of the on-load tap-changing device incorporating the controlled source is established in PSCAD software. The simulation results verify the effectiveness of the proposed scheme in controlling the voltage across the switching device and suppressing the generation of electric arcs during the switching process.

关键词(KeyWords)： 有载分接开关;受控源;飞轮电机;切换技术;PSCAD
OLTC;controlled source;flywheel motor;switching technique;PSCAD

Abstract:

Keywords:

基金项目(Foundation): 国家自然科学基金(51977030)

作者(Author): 李江,郭苏瑢,刘博
LI Jiang,GUO Surong,LIU Bo

DOI: 10.19585/j.zjdl.202509007

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