Analysis of the Action Characteristics of Power Grid Composition on Magnetic Bias DC Distribution
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.
power network structureneutral point direct currentaction characteristicscontri-bution