The DC magnetic bias phenomenon of transformers caused by HVDC transmission will adversely affect the AC power grid.Studying the mechanism and characteristics of AC grid voltage lev-el,structure and other factors on the distribution of DC magnetic bias can provide a theoretical reference for governance measures.Based on the complex network theory and the calculation model of DC mag-netic bias in substation,the contribution and function characteristics of different voltage levels of the power grid to the DC distribution of the system neutral point are analyzed,and the sensitivity of the neutral point DC distribution to different voltage levels of the power grid is studied.Finally,the multi-voltage level power system is taken as an example to verify the above theoretical analysis conclusion.The research results can provide theoretical support for avoiding and controlling the risk of transformer DC bias magnetic.
关键词
电网结构/中性点直流/作用特征/贡献
Key words
power network structure/neutral point direct current/action characteristics/contri-bution
维普
万方数据