基于三序电流分量分析的变压器联结组别和档位识别方法  

A Method for Identifying Coupling Groups and Gear Positions of Transformers Based on Symmetric Component Method

作　　者：石定中 黄笛 刘红文 普朝衫 彭应超 SHI Dingzhong;HUANG Di;LIU Hongwen;PU Chaoshan;PENG Yingchao(Lincang Power Supply Bureau of Yunnan Power Grid Co.,Ltd.,Lincang,Yunnan 677000,China;Electric Power Research Institute of Yunnan Power Grid Co.,Ltd.,Kunming,Yunnan 650000,China)

机构地区：[1]云南电网有限责任公司临沧供电局,云南临沧677000 [2]云南电网有限责任公司电力科学研究院,云南昆明650000

出　　处：《自动化应用》2023年第16期125-128,131,共5页Automation Application

摘　　要：台区配电变压器联结组别和档位参数在线路带电情况下难以直接获得,基于变压器一次、二次侧电压分析的识别方法存在变压器重载时参数识别误差较大、一次侧电压测量困难等问题,尤其是三相不平衡工况,识别难度进一步增大。本文提出一种基于三序电流分量分析的变压器联结组别和档位识别方法,利用电流正序分量的幅值和相角识别变压器联结组别和档位,提高识别准确性,并消除三相不平衡影响。案例分析和仿真验证了本文方法的正确性和有效性。Distribution transformer coupling group and gear parameters in the station area are dfficult to identify accurately under the condition of line energization,and the identification method based on the voltage ratio of one or two sides has problems of inaccurate identification,large error,and dfficult operation of field personnel,especially under the three-phase unbalance condition,which cannot be identified by using the voltage ratio of both sides in the transformer.This paper proposes a method based on the symmetric component method to separate the three sequence components of the three-phase unbalance current,and use the amplitude and phase angle of the positive sequence components of the current to identify the transformer coupling group and gear,to judge the transformer ratio,gear and group,and to eliminate the identification error caused by the three-phase unbalance.The case study and simulation verify the correctness and effectiveness of the method proposed in this paper.

关 键 词：变压器 组别 档位 三相不平衡 正序分量 

分 类 号：TM933[电气工程—电力电子与电力传动] TM421