Research on Key Technologies of Bus Tie Transmission Without Power Outage for 10 kV Bus During Main Transformer Protection Retrofit

JIA Yuanzheng; TIAN Jing

doi:10.13882/j.cnki.ncdqh.2509A041

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Research on Key Technologies of Bus Tie Transmission Without Power Outage for 10 kV Bus During Main Transformer Protection Retrofit

更新时间：2026-06-08

- Research on Key Technologies of Bus Tie Transmission Without Power Outage for 10 kV Bus During Main Transformer Protection Retrofit
- Rural Electrification Issue 5, Pages: 72-76(2026)
- 作者机构：
  
  国网北京市电力公司检修分公司，北京丰台,100071
- 作者简介：
- 基金信息：
- DOI：10.13882/j.cnki.ncdqh.2509A041
  CLC： TM773
- Published：2026
- 稿件说明：
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贾元峥, 田静. 主变保护改造中10 kV母线不停电的母联传动关键技术研究[J]. 农村电气化, 2026, (5): 72-76.

JIA Yuanzheng, TIAN Jing. Research on Key Technologies of Bus Tie Transmission Without Power Outage for 10 kV Bus During Main Transformer Protection Retrofit[J]. Rural Electrification, 2026, (5): 72-76.
贾元峥, 田静. 主变保护改造中10 kV母线不停电的母联传动关键技术研究[J]. 农村电气化, 2026, (5): 72-76. DOI： 10.13882/j.cnki.ncdqh.2509A041.

JIA Yuanzheng, TIAN Jing. Research on Key Technologies of Bus Tie Transmission Without Power Outage for 10 kV Bus During Main Transformer Protection Retrofit[J]. Rural Electrification, 2026, (5): 72-76. DOI： 10.13882/j.cnki.ncdqh.2509A041.

摘要

文章针对变电站主变保护改造过程中10 kV母线无法停电的问题，开展了不停电改造技术研究。通过采用挑线测电位、加装出口压板、增设中间继电器、利用检修压板以及数字仿真测试仪等技术，在不实际传动母联开关的前提下，完成了主变低后备保护与母联开关跳闸及闭锁回路正确性的验证。同时，针对TV二次电压回路的接入难题，对比了停TV转接与故录屏取电压2种方案在优缺点及风险方面的差异。通过方案比选与优化，最终形成了一套安全高效的不停电改造典型作业方案及相应的风险管理体系。

Abstract

This paper investigates retrofit technology without outage to address the problem that the 10 kV busbar cannot be powered off during main transformer protection retrofit in substations. By adopting techniques such as conductor selection and potential measurement

installation of trip output links

addition of intermediate relays

use of maintenance links

and digital simulation testers

the correctness of the low voltage side backup protection of the main transformer and the tripping and blocking circuits of the bus-tie breaker is verified without physically operating the bus-tie breaker. Meanwhile

for the difficulty of accessing the TV secondary voltage circuit

the advantages

disadvantages

and risks of two schemes

namely TV outage transfer and voltage acquisition from the fault recorder panel

are compared. Through scheme comparison and optimization

a safe and efficient typical work procedure and corresponding risk management system for retrofit without outage are finally developed.

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references

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国家电网有限公司.电力安全工作规程(变电部分)[M].北京:中国电力出版社,2020.

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