特高压直流换流变PLC控制系统“过负荷”信号逻辑分析  

Logic Analysis of "Overload" Signal of UHVDC Converter PLC Control System

作　　者：梁毅灵 牛峥[1] LIANG Yi-ling;NIU Zheng(Guangzhou Bureau of China Southern Power Grid Co.,Ltd.,EHV Transmission Company Guangzhou,Guangdong 510000)

机构地区：[1]中国南方电网有限责任公司超高压输电公司广州局,广东广州510000

出　　处：《新型工业化》2020年第1期20-24,共5页The Journal of New Industrialization

摘　　要：换流变压器在长期过负荷下运行时,将在不同程度上缩短其寿命,应尽量减少出现这种运行方式的机会;必须采用时,应尽量缩短超额定电流运行的时间,降低超额定电流的倍数,并投入全部的冷却器。本文针对特高压直流换流变PLC控制系统中关于"过负荷"信号的逻辑进行梳理,并且分析导致"过负荷"信号误发的原因。When the converter transformer is operated under long-term overload, its life will be shortened to varying degrees, and the chance of this operation mode should be minimized;when it must be adopted, the time of over-rated current operation should be minimized and the over-rated A multiple of the current and put into the full cooler. This paper reviews the logic of the "overload" signal in the UHV DC converter rheological PLC control system, and analyzes the reasons that cause the "overload" signal to be sent incorrectly.

关 键 词：特高压直流 换流变 PLC 过负荷 

分 类 号：TM721[电气工程—电力系统及自动化]