500 kV侧谐波过电压分析研究

500 kV Side Harmonic and Overvoltage Analysis

针对川藏联网工程中线路长度较长、昌都地区电网薄弱,可能会出现谐波及过电压问题。以沃卡变电站一次系统设计为例,对沃卡站500 kV侧空载合闸时产生的母线电压总谐波畸变率和各次谐波进行了详细的对比分析,验证了变电站设计的合理性,对工程实践有一定的指导意义。

The length of the line,in the Sichuan Tibet networking project,is long while and the power grid in the Changdu area is weak.And the hence,harmonic and overvoltage problems may occur.Taking the primary system design of Woka substation as an example,a detailed comparative analysis on of the total harmonic distortion rate and harmonics of the busbar voltage generated during the 500 kV side air to air closing of the Waka station was conducted,which verifieds thus,the rationality of substation design was verified.It has certain instructive significance to engineering practice.