Harmonic voltage excess problem test and analysis in UHV and EHV grid particular operation mode

International Conference on Energy Engineering and Environmental Protection 2017

能源学;生态环境科学

Lv, Zhenhua^1 ; Shi, Mingming^1 ; Fei, Juntao^1

Jiangsu Electric Power Company Research Institute, Nanjing

211103, China^1

关键词: 1000-kV UHV transmission line;    Construction process;    Different operating conditions;    EHV transmission line;    Harmonic impedances;    Mode of operations;    Specific harmonics;    Test and analysis;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/121/4/042012/pdf
DOI  :  10.1088/1755-1315/121/4/042012

学科分类：环境科学（综合）

来源: IOP

【 摘 要 】

The test and analysis of the power quality of some 1000kV UHV transmission lines and 500kV EHV transmission lines is carried out. It is found that there is harmonic voltage excess problems when the power supply of the UHV and EHV voltage line is single-ended or single-loop, the problem basically disappeared after the operation mode change, different operating conditions, the harmonic current has not been greatly affected, indicating that the harmonic voltage changes mainly caused by the system harmonic impedance. With the analysis of MATLAB Simulink system model, it can be seen that there are specific harmonic voltage excess in the system under the specific operating mode, which results in serious distortion of the specific harmonic voltage. Since such phenomena are found in 500kV and 1000kV systems, it is suggested that the test evaluation work should be done under the typical mode of operation in 500kV, 1000kV Planning and construction process to prevent the occurrence of serious distortion and the regional harmonic current monitoring and suppression work should be done.