Research and Verification of TEV Broadband Computing Model Based on Vector Fitting Method

WANG Zhiyuan; CHENG Lin; ZHANG Zongyang; KANG Chao; CHEN Yuhao; GUO Jie

doi:10.13296/j.1001-1609.hva.2025.03.016

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Research and Verification of TEV Broadband Computing Model Based on Vector Fitting Method

Research & Analysis | 更新时间：2025-05-25

- Research and Verification of TEV Broadband Computing Model Based on Vector Fitting Method
- High Voltage Apparatus Vol. 61, Issue 3, Pages: 138-143(2025)
- 作者机构：
  
  1.西安交通大学电气工程学院，西安　 710049
  2.国网陕西省电力有限公司电力科学研究院，西安　 710100
- 作者简介：
- 基金信息：
  
  State Grid Corporation Headquarters Technology Project(5226SX21001B)
- DOI：10.13296/j.1001-1609.hva.2025.03.016
  CLC：
- Received：07 September 2024，
  
  Revised：10 November 2024，
  
  Published：16 March 2025
- 稿件说明：
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WANG Zhiyuan, CHENG Lin, ZHANG Zongyang, et al. Research and Verification of TEV Broadband Computing Model Based on Vector Fitting Method[J]. High voltage apparatus, 2025, 61(3): 138-143.
DOI：

WANG Zhiyuan, CHENG Lin, ZHANG Zongyang, et al. Research and Verification of TEV Broadband Computing Model Based on Vector Fitting Method[J]. High voltage apparatus, 2025, 61(3): 138-143. DOI： 10.13296/j.1001-1609.hva.2025.03.016.

摘要

随着近些年GIS的广泛应用和电压等级的提高，由开关操作产生的陡波前过电压（VFTO）经传导、耦合在GIS壳体上引起的瞬态地电位抬升（TEV）对电站设备与人员安全造成的威胁越来越大，因此准确的仿真计算TEV对分析TEV特性和确定防护措施具有重要意义。在TEV计算模型中，电气尺寸大、结构复杂的地网模型是保证计算准确性的关键，文中通过研究多种频率注入电流下地网的TEV特性，结合电路的黑箱理论提出了一种基于矢量匹配法与Cdegs仿真软件的地网宽频计算模型搭建方法，并依托330 kV GIS隔离开关模拟骚扰源实验平台，验证了地网宽频计算模型的合理性，TEV的主频计算误差为5.9%，TEV幅值计算误差为13.15%，证明了该方法搭建的地网宽频计算模型具有较高的仿真计算精度。

Abstract

In recent years

with the wide application and improvement of voltage level of GIS

the transient ground potential rise (TEV) on the GIS enclosure due to conduction and coupling of the steep wave-front overvoltage (VFTO) generated by the switching operation is becoming more and more threatening to the safety of power station equipment and operating personnel. Therefore

accurate simulation and calculation of TEV is of great significance to the analysis of TEV characteristics and the determination of protective measures. In the TEV calculation model

the ground network model with large electrical size and complex structure is the key to ensure the calculation accuracy. In this paper

a method for setting up the ground network broadband calculation model based on vector fitting method and Cdegs simulation software is proposed by way of studying the TEV characteristics of the ground network under various working conditions and combining with the black box theory of the circuit. The rationality of the ground network broadband calculation model is verified by relying on the 330 kV GIS disconnector simulation disturbance source experiment platform. The main frequency calculation error of the TEV is 5.9%

and the calculation error of TEV amplitude is 13.15%

proving that the ground network broadband calculation model set up by this method has high simulation accuracy.

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Related Institution

State Key Laboratory of Power Transmission Equipment & System Security and New Technology, Chongqing University

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西安交通大学电气工程学院陕西西安710049

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