A Suppressing Method for Very Fast Transient Overvoltage Based on a Frequency-Sensitive Busbar with a Laminated-Material Structure
Li Hongbin1, Han Linshan1, Ye Guoxiong2, Chen Qing1, Jiao Yang1
1. School of Electrical and Electronic Engineering Huazhong University of Science and Technology Wuhan 430074 China; 2. China Electric Power Research Institute Wuhan 430074 China
Abstract:In very fast transient overvoltage (VFTO), the high frequency component has high amplitude and strong coupling, which poses a serious threat to the safe operation of electrical equipment. At present, some research works on suppression methods have been carried out, but the fault situations of the primary and secondary fusion equipment equipped with protective measures have not been completely solved. In that case, on the basis of ascertaining the influence of busbar impedance on the high frequency signal attenuation process, making full use of the frequency sensitivity of the skin effect, this paper proposes a high-low resistance laminated busbar structure for high-frequency component suppression, by adding high-resistance surface layer to the surface of conventional busbar: the power frequency component is transmitted in the inner low-resistance medium and is not affected; the high-frequency component of VFTO is constrained in the surface high-resistance medium during transmission to improve the speed and amplitude of attenuation greatly. Furthermore, an equivalent experiment has been carried out to verify the effectiveness of this method.
李红斌, 韩林汕, 叶国雄, 陈庆, 焦洋. 基于频敏高-低阻层叠母线结构的特快速暂态过电压高频成分抑制方法[J]. 电工技术学报, 2022, 37(19): 4969-4977.
Li Hongbin, Han Linshan, Ye Guoxiong, Chen Qing, Jiao Yang. A Suppressing Method for Very Fast Transient Overvoltage Based on a Frequency-Sensitive Busbar with a Laminated-Material Structure. Transactions of China Electrotechnical Society, 2022, 37(19): 4969-4977.
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