两类母线电压谐波责任划分模型的仿真比较  

Simulation comparison between two models of the harmonic voltage contributions determination of the concerned bus

作　　者：安海清 岳娜 邢宇欣 An Haiqing;Yue Na;Xing Yuxin(State Grid Jibei Electric Power Company Limited Maintenance Branch Company,Beijing 102488)

机构地区：[1]国网冀北电力有限公司检修分公司,北京102488

出　　处：《电气技术》2018年第11期55-59,共5页Electrical Engineering

摘　　要：母线电压谐波责任定量划分模型主要分为两类:(1)为划分单个公共连接点处某个受关注谐波源以及电网侧谐波责任的单点等值模型;(2)为划分多个谐波源在远端特定母线处产生的谐波污染责任的多点等值模型。首先,从理论上对两类谐波电压责任划分模型的特点及其适用场合进行详细的分析比较;其次,通过对IEEE14节点标准测试系统进行仿真算例验证。仿真结果表明,单点等值模型适合划分系统背景谐波电压波动较小情况下的谐波污染责任。而当系统中所有主要谐波源情况已知时,多点等值模型可以避免单点等值模型因背景谐波电压剧烈波动带来的谐波阻抗估计误差偏大的缺点,进而更准确地划分每个谐波源在关注母线处产生的谐波电压责任。The models of harmonic voltage contributions determination are divided into two categories.The first model is called a single-point equivalent model,which is to allocate the harmonic voltage contributions between the concerned harmonic sources at the single point of common connection and the grid side.The second model is called a multi-point equivalent model,which is to determine the harmonic contributions of the multiple harmonic sources at the distal end of a particular bus.The characteristics and their application of occasions of the two models are theoretically analyzed and compared in detail in this paper.Several case studies based on the IEEE 14-bus standard test system are conducted.The simulation results show that the single-point equivalent model is suitable for the harmonic voltage contributions determination when the background harmonic voltage fluctuation is constant or small.However,when all the main harmonic sources in the system are known,the multi-point equivalent model can avoid the shortcomings of the single-point equivalent model,i.e.the error of the harmonic impedance estimation is too large which is caused by the background harmonic voltage fluctuation,so that the harmonic voltage contributions of each harmonic source at concerned bus can be determined more accurately.

关 键 词：电能质量 谐波电压责任 谐波阻抗 背景谐波电压 等值模型 

分 类 号：TM711[电气工程—电力系统及自动化]