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    Abstract: This paper aims at the grid operation problems brought by large-scale photovoltaic connections to the distribution network. It proposes a two-stage scheduling strategy for air-conditioning load to participate in the photovoltaic absorption of distribution network, considering the regulation potential of air-conditioning load. In the first stage, in the micro-grid layer, each air-conditioning load aggregator made a market bid based on a non-cooperative game to determine the day-ahead scheduling plan according to the plan of photovoltaic absorption formulated by the micro-grid operator in the past. In the second stage, the power might return to the main network when the micro-grid in the distribution network layer cannot fully absorb the photovoltaic output. This situation could lead to an over-limit voltage phenomenon in the network. The power grid company adjusted the voltage by using the regulation potential of the air-conditioning load to solve this situation.The simulation results show that the strategy proposed in this paper enhanced the utilization of photovoltaic power and adjusted the distribution network voltage. Besides, the proposal improved the profit of the air-conditioning load aggregator and reduced the regulation cost of the micro-grid operators and the power grid company.

    Key words: photovoltaic absorption; air-conditioning load; non-cooperative game; voltage regulation