摘要
谐波责任划分是实施奖惩方案的前提,为此提出了一种“总谐波阻抗”的概念估算各谐波源的谐波责任。首先,基于等值电路建立等效数学模型,定义总谐波阻抗。采用叠加原理将PCC点的谐波电压拆分为各个谐波源单独作用时在PCC点引起的谐波电压,通过估算总谐波阻抗计算用户侧各谐波源在PCC点产生的谐波电压,将各谐波电压在PCC点谐波电压上的投影作为评估指标,估算各谐波源的谐波责任。由于谐波源的理论电流在实际中无法测量,本文利用馈线实际电流代替谐波源理论电流计算总谐波阻抗,并探讨了由此引起的幅值误差和相位误差。最后进行仿真验证,结果表明,所提方法提高了谐波责任划分的准确度。
Considering that harmonic responsibility division is the premise of implementing reward and punishment pro⁃grams,a concept of“total harmonic impedance”is proposed to estimate the harmonic responsibility of each harmonic source.Firstly,an equivalent mathematical model is established based on the equivalent circuit,and the concept of to⁃tal harmonic impedance is defined.Secondly,the superposition principle is used to convert the harmonic voltage at the PCC point into the sum of harmonic voltages caused by individual harmonic sources acting at the PCC point,respective⁃ly.The harmonic voltage generated at the PCC point by each harmonic source on the user-side can be calculated by esti⁃mating the total harmonic impedance,and the projection of each harmonic voltage on the harmonic voltage at the PCC point is used as an evaluation index to estimate the harmonic responsibility of each harmonic source.Since the theoreti⁃cal current in the harmonic source cannot be measured in practice,the actual current in the feeder is used instead of the theoretical value to calculate the total harmonic impedance,and the resulting amplitude and phase errors are further discussed.Finally,simulations are conducted to verify the analysis,and results show that the proposed method im⁃proves the accuracy of harmonic responsibility division.
作者
刘飞帆
周福林
杨瑞轩
刘桓瑞
丁泽俊
LIU Feifan;ZHOU Fulin;YANG Ruixuan;LIU Huanrui;DING Zejun(School of Electrical Engineering,Southwest Jiaotong University,Chengdu 610031,China;Electric Power Research Institute,China Southern Power Grid,Guangzhou 510663,China)
出处
《电力系统及其自动化学报》
CSCD
北大核心
2020年第10期97-103,共7页
Proceedings of the CSU-EPSA
关键词
谐波责任划分
单谐波源
多谐波源
总谐波阻抗
harmonic responsibility division
single harmonic source
multi-harmonic source
total harmonic imped⁃ance
