Open AccessResearch on Static Potential Distribution Characteristics of Thyristor Valve of UHV Controllable Arrester
Author(s) -
Zhe Chen,
Li Shen,
Chonghao Fang,
Zhiyuan Wang,
Pengfei Li,
Zhanfeng Deng,
Xianshan Guo
Publication year - 2021
Publication title -
journal of physics. conference series
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.21
H-Index - 85
eISSN - 1742-6596
pISSN - 1742-6588
DOI - 10.1088/1742-6596/2005/1/012128
Subject(s) - thyristor , static induction thyristor , integrated gate commutated thyristor , overvoltage , gate turn off thyristor , mos controlled thyristor , electrical engineering , lightning arrester , voltage , thyristor drive , engineering , triac , transistor , gate oxide
The ultra-high voltage(UHV) AC thyristor valve-type controllable arrester can realize the access and exit of the controllable unit through the action characteristics of the thyristor, dynamically change the volt-ampere characteristics of the arrester connected to the system, to reliably and deeply suppress the operating overvoltage. Under continuous operating voltage, stray capacitance will cause the uneven distribution of axial potential at the high-voltage end of the thyristor valve. In severe cases, the thyristor with higher voltage may be triggered by mistake, which endangers the system security. Due to the more changeable potential distribution of thyristor valve under different ambient temperatures and charge rates, higher requirements are put forward for the design and application of the thyristor valve. Therefore, based on the test data, this paper simulates and analyzes the influence of the voltage and temperature changes of the thyristor and resistor on the potential distribution of the thyristor valve under the continuous operating voltage, analyzes and compares the configuration modes of various voltage equalizng capacitors, and obtains the voltage equalizng measures with better optimization effect, which provides a reference for the voltage equalizng optimization of the thyristor valve.