Research On Air Conditioning Load Modeling And Its Optimal Scheduling Method For Aggregation Group Based On Demand Response

As a key technology of the smart grid,demand response can change users' electricity consumption habits through signals such as electricity prices or incentives to meet the needs of the optimized operation of the power system.Air conditioning load is an important component of demand response resources.In this paper,the mathematical model of split frequency-fixed air conditionings and the grouping method after aggregation are proposed.Deep research is conducted which is aimed at the problem of wind power output fluctuation smoothing with the participation of the air conditionings aggregation group in the distribution network and the problem of the load peak-shaving and valley-filling game optimization with the participation of multiple air conditioning aggregations.The specific contents include the following:1)Based on the air-conditioning equivalent thermal parameter model currently adapted to minute-level time scale scheduling,the split fixed-frequency air-conditioning load is optimized for an hour time period to obtain a step function characteristics between the minimum average air-conditioning load per hour and the temperature difference set at the beginning and end of the hour,and the characteristic is linearized to established a temperature difference-power model suitable for air-conditioning hourly time scale dispatching.Then through analysis,the upper and lower limits of the total power consumption of the air-conditioning load based on the temperature difference-power model in multi-hour scheduling are obtained.A grouping method for large-scale air conditioners is proposed for the two air conditioning modeling methods.2)Aiming at the problem that the power of renewable energy fluctuates too much and does not meet the grid access standard,based on the equivalent thermal parameter mathematical model of air conditioner,an air conditioning group optimal dispatching model of the tie line power fluctuation smoothing in the wind power microgrid system is established,and the power fluctuation smoothing threshold and compensation strategy based on user comfort are taken into account in the model.Simulation results show that the power fluctuation smoothing model proposed in this paper can more effectively exert the flexible resource performance of the air conditioning than the method of smoothing through the square sum minimum of tie line power fluctuations..3)A multiple air conditioning aggregators game optimization scheduling method based on the air-conditioning temperature difference-power model is established.For the discretization of control variables in the air-conditioning temperature difference-power model,continuous intermediate variables are introduced to establish a layered optimization model of the game.The proof and solution of game equilibrium solution and the applicable conditions of temperature difference power characteristics in this optimization model are also given.Finally,a simulation example verifies the effect and advantages of the game hierarchical optimization model established in this paper.