Automatic Re-synchronization Control Strategy of UHVDC Converter Transformer Taps

SHI Weiguang; CHENG Xiaosheng; HAO Chenglong; LI Pingwei; ZHAO Yuting; REN Chunguang

doi:10.13296/j.1001-1609.hva.2024.05.014

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Automatic Re-synchronization Control Strategy of UHVDC Converter Transformer Taps

Research & Analysis | 更新时间：2025-04-26

- Automatic Re-synchronization Control Strategy of UHVDC Converter Transformer Taps
- High Voltage Apparatus Vol. 60, Issue 5, Pages: 108-116(2024)
- 作者机构：
  
  1.国网山西省电力公司检修分公司，太原　 030000
  2.太原理工大学，太原　 030024
- 作者简介：
- 基金信息：
  
  State Grid Shanxi Electric Power Company Science and Technology Project(SGSXJX00YMJS2000352)
- DOI：10.13296/j.1001-1609.hva.2024.05.014
  CLC：
- Received：09 November 2023，
  
  Revised：19 January 2024，
  
  Published：16 May 2024
- 稿件说明：
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SHI Weiguang, CHENG Xiaosheng, HAO Chenglong, et al. Automatic Re-synchronization Control Strategy of UHVDC Converter Transformer Taps[J]. High voltage apparatus, 2024, 60(5): 108-116.
DOI：

SHI Weiguang, CHENG Xiaosheng, HAO Chenglong, et al. Automatic Re-synchronization Control Strategy of UHVDC Converter Transformer Taps[J]. High voltage apparatus, 2024, 60(5): 108-116. DOI： 10.13296/j.1001-1609.hva.2024.05.014.

摘要

特高压输电技术承载着新能源远距离输送的重要任务，是助力“双碳目标”达成的有力支撑，然而，受新能源上网功率波动的影响，特高压直流输电系统中送电端换流变压器分接头动作次数频繁，严重影响换流变压器使用寿命。为减少分接头动作次数，文中建立了直流输电电流、晶闸管触发角及分接头档位等关键影响因子之间的数学关系，在分析现有分接头控制策略不足的基础上，提出面向特高压直流输电系统的同极换流变压器分接头自动再同步控制策略。以雁淮特高压直流输电系统为例，通过数学推导及MATLAB/Simulink仿真，对传统策略和改进策略进行对比。结果表明所提策略有效降低分接头动作次数，提升特高压直流输电系统运行质效。

Abstract

UHVDC power transmission technology undertakes the important task of long-distance transmission of new energy

which can be a strong support to the ‘dual Carbon goal’. However

due to the fluctuation of new energy power

the converter transformer taps at the transmission end of the UHVDC transmission system operates frequently

which seriously affects the service life of the converter transformer. For reducing the number of operations of the tap

the mathematical relationship among such key influencing factors as DC transmission current

thyristor firing angle and tap gear are set up in this paper and

on the basis of the analysis of the insufficient existing tap control strategy

a new method of automatic resynchronization control strategy for the taps of pole converter transformers for UHVDC transmission system is proposed. Finally

the Yanhuai UHVDC transmission system is taken as an example

the traditional and improved strategy are compared by mathematical derivation and MATLAB/Simulink simulation. The results show that the proposed strategy can effectively reduce the number of tap operations and assure reliable operation of the UHVDC transmission system.

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