无功功率就地补偿对变压器调档过程的影响分析  

The analysis of reactive power compensation on the spot of transformer shifting process

作　　者：罗璐 张春刚 Luo Lu;Zhang Chungang(Kunming Railway Vocational Technical College, Kunming 650208;Kunming Power Supply Bureau of Yunnan Power Grid Co., Ltd, Kunming 650000)

机构地区：[1]昆明铁道职业技术学院,昆明650208 [2]云南电网有限责任公司昆明供电局,昆明650000

出　　处：《电气技术》2019年第4期86-90,共5页Electrical Engineering

摘　　要：本文以一起某110kV变电站变压器差流越限告警实例为依据,深入分析了变电站内变压器调档过程中由于系统节点无功功率不足,且该变电站内未安装无功补偿设备,导致变压器差动保护和差动电流增加,并触发差流越限告警,威胁电网的安全稳定运行。文中采用现场记录的数据计算出变压器调档过程中产生的差流大小,并从理论上探析了无功功率对变压器及输电线路的影响,为类似事件的分析提供参考。Based on an example of transformer differential current over-limit alarm in a 110kV substation, this paper analyzes in-depth the problem of transformer over-limit alarm caused by insufficient reactive power at system nodes and no reactive power compensation equipment installed in the substation during the shifting process of transformer in the substation. Threatening the safe and stable operation of the power grid. This paper calculates the differential current produced in the course of transformer shifting by using the data recorded on the spot, and analyzes the influence of reactive power compensation on transformers and transmission lines theoretically, which provides a reference for the analysis similar events.

关 键 词：无功功率补偿 电网稳定 变压器调档 差流越限告警 

分 类 号：TM41[电气工程—电器]