高压并联电抗器对750kV线路损耗影响机理研究  

Influence mechanisms of high-voltage shunt reactors on 750kV transmission line losses

作　　者：卓建宗 刘文颖[1] 刘福潮[2] 但扬清[3] 夏鹏[1] 魏泽田 

机构地区：[1]华北电力大学电气与电子工程学院,北京102206 [2]国网甘肃省电力公司电力科学研究院,甘肃兰州730050 [3]国网浙江省电力公司经济技术研究院,浙江杭州310007

出　　处：《电工电能新技术》2017年第4期24-28,共5页Advanced Technology of Electrical Engineering and Energy

基　　金：国家科技支撑计划项目(2015BAA01B04);国家电网公司重大项目(52272214002C)

摘　　要：750kV线路普遍配置了大容量高压并联电抗器,但在线损分析时往往忽略高压电抗器对损耗的影响,造成750kV电网线损分析结果误差较大。基于此,建立了计及高压电抗器的750kV线路综合损耗模型,分析了高压电抗器对750kV线路综合损耗的影响机理。高压电抗器接入降低了750kV线路无功功率造成的有功损耗,但同时高压并联电抗器也产生有功损耗。随着750kV线路传输功率的增加,高压并联电抗器接入后的750kV线路综合损耗率将呈现先降低后升高的变化规律。在750kV线路电阻损耗和高压电抗器损耗近似相等时,线路综合线损率最低,线路运行经济性最优。Large-capacity high-voltage shunt reactors are generally installed in 750kV transmission lines. It will bring large error to 750kV line loss analysis when ignoring the influence of HV reactors on the line losses. On this basis this paper proposes a 750kV line comprehensive loss model considering HV reactors losses. By using this model, the influence mechanism of HV reactors on 750kV transmission line losses is analyzed. Due to the integra- tion of HV reactors, the part of line losses caused by reactive power is lessened. However, the HV reactors can also generate active losses themselves. As the transmitted power of the line increases, the comprehensive loss rate of 750kV transmission line decreases firstly and increases subsequently after the integration of HV reactors. And the line comprehensive loss rate is lowest when the resistive losses of 750kV transmission line is approximately equal to the losses of high-vohage reactors, which means the economy of the transmission line is optimal..

关 键 词：高压并联电抗器 750KV线路 线路综合损耗 影响机理 

分 类 号：TM711[电气工程—电力系统及自动化]