摘要
准确量化计算电能质量问题与低压配电网附加损耗间的关系对分析损耗构成、提高损耗计算精度、制定合理降损措施具有指导意义。在理论分析三相不平衡、电压偏差同时存在时和谐波单独存在时低压配电网配电变压器与线路附加损耗的基础上,采用谐波三相不平衡度表征指标得到复合电能质量下低压配电网的附加损耗计算模型,在Matlab/Simulink中对简单低压配电网进行建模仿真,仿真验证了复合电能质量下低压配电网的附加损耗计算模型的正确性与精确性。
The accurate quantitative calculation of the relationship between power quality problems and the additional loss of low⁃voltage distribution network is of guiding significance for analyzing the composition of loss,improving accuracy of loss calculation and formulating reasonable loss reduction measures.On the basis of theoretical analysis of the additional loss of distribution transformer and line in low voltage distribution network in the presence of concurrence of three⁃phase unbalance and voltage deviation as well as occurrence of harmonics alone,the additional loss calculation model of low voltage distribution network under composite power quality is obtained by using the characterization index of harmonic three⁃phase unbalance degree,and the simple low voltage distribution network is modeled and simulated in MATLAB/SIMULINK.The correctness and accuracy of the additional loss calculation model of low⁃voltage distribution network under composite power quality are verified by the simulation.
作者
王倍倍
蒋建东
WANG Beibei;JIANG Jiandong(School of Electrical Engineering,Zhengzhou University,Zhengzhou 450001,China)
出处
《电力电容器与无功补偿》
2022年第4期52-59,共8页
Power Capacitor & Reactive Power Compensation
基金
国家自然科学基金项目(51507155)。
关键词
复合电能质量
低压配电网
附加损耗
谐波三相不平衡度
量化计算
建模仿真
composite power quality
low voltage distribution network
additional loss
harmonic three⁃phase unbalance
quantitative calculation
modeling simulation
