Work

Research on the transient characteristics of current and voltage during zero crossing natural shutdown of anti parallel thyristors in hybrid on-load tap changer

Year: 2025

Type: conference-paper

Abstract: The thyristor-assisted arc-quenching hybrid on-load tap changer (OLTC) integrates the benefits of both mechanical and power electronic OLTCs, utilizing anti-parallel thyristors to aid in mechanical contact switching. However, this hybrid OLTC faces challenges such as high di/dt during thyristor conduction and significant peak voltages and du/dt at thyristor turn-off. This paper presents a simulation study on the transient current and voltage characteristics during thyristor conduction and natural turn-off. It also determines key technical parameters like the critical du/dt and di/dt for the thyristor in a 35 kV hybrid OLTC.

Source: Journal of Physics Conference Series

DOI: 10.1088/1742-6596/3065/1/012022

Authors: Jiayun Zhu, He Liu, Yonghao Fang, Huiyuan Zhang, Benping Ding, Xiaotong Yang

Institutions: China Electric Power Research Institute, State Grid Shanghai Municipal Electric Power Company (China)

Language: English

Topic: High-Voltage Power Transmission Systems

Subfield: Electrical and Electronic Engineering

Field: Engineering

Domain: Physical Sciences

SDG: Affordable and clean energy

Open Access status: diamond

OpenAlex ID: W4413287284

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