摘要
为了解决现有的变压器各侧CT二次回路接线校验方案施工难度大、准确性差、普适应和效率低等问题,提出一种主变CT极性和保护方向自适应校验方案:利用变压器空充时励磁涌流功率特性的高压侧及零序CT接线校验算法以及基于潮流分析的中、低压侧CT接线自适应校验算法,并将该算法内嵌入至变压器保护装置中,利用主变空载合闸及带负荷测试过程对变压器各侧的CT相序和极性等接线进行自主校验,并在CT接线错误的情况下,经延时动作跳闸,生成动作报告;在CT接线正确的情况下,生成校验报告。RTDS仿真分析验证了该方法的有效性。
In order to solve the problems of complicated construction,poor accuracy,and low adaptability and efficiency in CT secondary circuit wiring verification of the main transformer on each side,an adaptive verify scheme for CT polarity and protection direction of main transformer is proposed.High voltage side and zero-sequence CT wiring verification algorithm based on inrush current power characteristics during the transformer no-load closing period and an adaptive calibration algorithm for CT connections in middle and low voltage sides based on power flow analysis are applied,and embed this scheme into the transformer protection device,With the help of the main transformer no-load closing and load testing process,the CT phase sequence and polarity of transformers are verified automatically on each side of the transformer,and in the case of wrong CT wiring,tripping is triggered after a certain delay time and an action report is generated.When the CT wiring is correct,a verification report is generated.RTDS simulation analysis verifies the effectiveness of the scheme.
作者
李本瑜
宋晓亮
王冰清
LI Benyu;SONG Xiaoliang;WANG Bingqing(Yunnan Electric Power Dispatching Control Center,Kunming 650011,China;CYG SUNRUI CO.,Ltd.,Shenzhen Guangdong 518057,China)
出处
《自动化与仪器仪表》
2019年第5期171-174,178,共5页
Automation & Instrumentation
关键词
变压器保护
励磁涌流
潮流分析
CT极性
自适应校验
power transformer protection
inrush current
power flow analysis
CT polarity
adaptive verify
