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Large-scale new energy access to the power grid will cause a series of problems such as the decrease of system frequency and voltage strength, affecting the safe and stable operation of the power grid. The paper analyzes the impact of new energy access to Hunan power grid, reviews the relevant policies of new energy grid-connected operation and management issued by Hunan, analyzes the problems existing in the current Hunan new energy grid-connected operation and management mode, and puts forward measures and suggestions to optimize the grid-connected operation and management in order to provide reference for promoting the high-quality development of new energy.