Characteristic Analysis of Core Snubber and Analysis of Protection Scheme for Surge Suppression of − 1MV Five-Stage Voltage System

IF 1.9 4区工程技术 Q1 NUCLEAR SCIENCE & TECHNOLOGY

Journal of Fusion Energy Pub Date : 2023-09-25 DOI:10.1007/s10894-023-00385-5

Zhiheng Li, Shaoxiang Ma, Hongqi Zhang, Bangyou Zhu, Ming Zhang, Kexun Yu, Yuan Pan

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Abstract

When the breakdown of acceleration grid occurs, the core snubber can consume fault energy and limit the arc current. In this paper, the expression of equivalent circuit model is optimized. The value of magnetization inductance at da₁/dt = 0 is analyzed and the equivalent resistance expression eddy current coefficient is revised from 2.5 to 1. The simulation model with gyrator and the high voltage short circuit experiment platform are described. The rationality of the model hypothesis is verified. Then the effectiveness of equivalent circuit model established in this paper is verified. Also, the dynamic response of the discharge circuit is obtained and the influence of system leakage inductance on the surge suppression process is analyzed. At the same time, in this paper, the distributed capacitance of the transmission line is extracted, and the structure parameters of core snubber suitable for −1MV voltage level are designed. Based on the structure design parameters of snubber, distributed capacitance values of transmission line and power supply parameters, the overall configuration scheme of passive protection components in −1MV five-stage voltage system is analyzed.

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- 1MV五级电压系统铁心缓冲器特性分析及浪涌抑制保护方案分析

当加速电网发生击穿时，铁心缓冲器可以消耗故障能量，限制电弧电流。本文对等效电路模型的表达式进行了优化。分析了da1/dt = 0时的磁化电感值，并将等效电阻表达式涡流系数由2.5修正为1。介绍了带旋转器的仿真模型和高压短路实验平台。验证了模型假设的合理性。然后验证了本文建立的等效电路模型的有效性。得到了放电电路的动态响应，分析了系统漏感对电涌抑制过程的影响。同时，本文对传输线的分布电容进行了提取，设计了适用于−1MV电压等级的铁心缓冲器结构参数。根据缓冲器的结构设计参数、传输线分布电容值和电源参数，分析了- 1MV五级电压系统中无源保护元件的总体配置方案。

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来源期刊

Journal of Fusion Energy 工程技术-核科学技术

CiteScore

2.20

自引率

0.00%

发文量

审稿时长

2.3 months

期刊介绍： The Journal of Fusion Energy features original research contributions and review papers examining and the development and enhancing the knowledge base of thermonuclear fusion as a potential power source. It is designed to serve as a journal of record for the publication of original research results in fundamental and applied physics, applied science and technological development. The journal publishes qualified papers based on peer reviews. This journal also provides a forum for discussing broader policies and strategies that have played, and will continue to play, a crucial role in fusion programs. In keeping with this theme, readers will find articles covering an array of important matters concerning strategy and program direction.