计及电能质量影响的10kV配电网损耗计算模型及其实验验证  

Calculation model of 10kV distribution network loss considering power quality impact and its experimental verification

作　　者：李琼林 刘书铭 温佳静 王毅 代双寅 谭甜源[2] 刘开培[2] LI Qionglin;LIU Shuming;WEN Jiajing;WANG Yi;DAI Shuangyin;TAN Tianyuan;LIU Kaipei(Electric Power Research Institute of State Grid Henan Electric Power Company,Zhengzhou 450000,China;School of Electrical Engineering and Automation,Wuhan University,Wuhan 430072,China)

机构地区：[1]国网河南省电力公司电力科学研究院,河南郑州450000 [2]武汉大学电气与自动化学院,湖北武汉430072

出　　处：《电力自动化设备》2022年第1期212-220,共9页Electric Power Automation Equipment

基　　金：国家电网公司总部科技项目(5400⁃201921142A⁃0⁃0⁃00)。

摘　　要：随着智能电网的不断发展,电能质量扰动日益增加,探索计及电能质量因素的配电网损耗计算模型对电力系统节能降损有十分重要的意义。分别给出了在谐波、三相电流不平衡、电压偏差这3种常见的电能质量扰动影响下的10 kV配电网的损耗计算模型;然后提出了同时考虑多种电能质量扰动的10 kV配电网损耗评估方法并建立了计算模型,提高了10 kV配电网损耗理论计算的准确度。配电网损耗综合评估分为固定损耗评估和可变损耗评估2个部分,固定损耗评估主要考虑电压偏差对变压器固定损耗的影响,可变损耗评估对以上3种电能质量扰动进行解耦评估,然后综合估算出10 kV配电网的可变损耗的综合附加损耗率。最后通过实验验证了所提计算方法及对应模型的正确性。With the continuous development of smart power grid,power quality disturbance is increasing day by day.Therefore,it is of great significance to explore the power distribution network loss calculation model considering power quality factors for energy conservation and loss reduction of power system.The calculation models of 10 kV distribution network loss under the influence of three common power quality disturbances,i.e.harmonic,three-phase current unbalance and voltage deviation,are respectively given.Then simultaneously considering multiple power quality disturbances,the evaluation method of 10 kV distribution network loss is proposed and the corresponding calculation model is established,which improves the theoretical calculation accuracy of 10 kV distribution network loss.The comprehensive evaluation process is divided into fixed loss and variable loss evaluation.In the fixed loss evaluation,the influence of voltage deviation on the fixed loss of the transformer is mainly considered.In the variable loss evaluation,the above three power quality disturbances are decoupled and evaluated,and then the comprehesive additional loss rate of variable loss of 10 kV distribution network is comprehensively estimated.Finally,the correctness of the proposed model and the corresponding model are verified through experiments.

关 键 词：电能质量 10 kV配电网损耗 谐波 三相电流不平衡 电压偏差 

分 类 号：TM712[电气工程—电力系统及自动化]