|
|
|
| Analysis and improvement on the failure of block of magnetizing inrush current criterion in PST—1200U |
| WANG Chanyuan1, KONG Ming2 |
1. Danyang Power Supply Company, State Grid Jiangsu Electric Power Co.,Ltd, Zhenjiang, Jiangsu 212000;
2. Zhenjiang Power Supply Company, State Grid Jiangsu Electric Power Co.,Ltd, Zhenjiang, Jiangsu 212000 |
|
|
|
|
Abstract The PST—1200U series transformer protection device based on waveform symmetry principle has an internal threshold value. When the secondary value of excitation inrush current is lower than the internal threshold value of the device, the protection device does not distinguish it from the excitation inrush current and treats it as a general differential current. If the startup setting of differential protection is less than threshold value, it will form a blocking “dead zone” for excitation inrush current, leading to differential protection false tripping of the switch. This article analyzes the reasons for the blocking “dead zone” of excitation inrush current, provides corresponding solutions and verifies them through on-site tests and actual airdrop transformers.
|
|
Received: 24 May 2024
|
|
|
|
| Cite this article: |
|
WANG Chanyuan,KONG Ming. Analysis and improvement on the failure of block of magnetizing inrush current criterion in PST—1200U[J]. Electrical Engineering, 2024, 25(11): 81-84.
|
|
|
|
| URL: |
|
https://dqjs.cesmedia.cn/EN/Y2024/V25/I11/81
|
[1] 李梅, 唐菊生. 基于综合制动判据的变压器差动保护研究[J]. 电力科学与技术学报, 2020, 35(2): 135-141.
[2] 曾耀吾, 李晓松, 陈萌, 等. 机车牵引变压器空载合闸励磁涌流特性分析[J]. 电力科学与技术学报, 2013, 28(4): 19-23.
[3] 叶志军, 于旺, 郑荣显, 等. 变压器空充下的励磁涌流二次谐波特性分析[J]. 电力系统自动化, 2020, 44(24): 145-150.
[4] 俞纪维, 董纲, 宋晓斌, 等. 主变空载合闸励磁涌流的分析与探讨[J]. 电气技术, 2016, 17(5): 131-133.
[5] 黄少锋, 李姗姗, 肖远清. 基于非周期分量衰减速率的变压器励磁涌流鉴别方法[J]. 电力系统保护与控制, 2018, 46(15): 9-15.
[6] 吴昌设, 林琳, 刘希嘉. 变压器差动保护的励磁涌流制动方法[J]. 电力科学与技术学报, 2009, 24(3): 58-62, 67.
[7] 邝代华. 一种变电站二次防误功能实现方法[J]. 电气技术, 2023, 24(11): 54-60.
[8] 黄景光, 赵娇娇, 林湘宁, 等. 基于SPWM的变压器励磁涌流抑制技术研究[J]. 高压电器, 2019, 55(10): 210-215.
[9] 姚东晓, 张凯, 贺要锋, 等. 变压器多特征励磁涌流识别方案研究[J]. 电力系统保护与控制, 2017, 45(13): 149-154.
[10] 丁杰, 吕航, 王风光, 等. 应用于低频电力系统的母线差动保护判据研究[J]. 电气技术, 2023, 24(10): 44-50. |
|
|
|
2024, Vol. 25 
