Research On Optimal Dispatch Of Distribution Network With "New Energy-load-energy Storage" Interaction Under Demand Side Response

With the increasing proportion of new energy in the power grid,it has brought many challenges to the optimal dispatch of traditional distribution networks,and the active distribution network is a distribution network with a flexible topology,which can achieve distributed new energy,Effective on-grid control and management of energy storage equipment and intelligent power loads.In order to achieve coordinated and efficient utilization of resources in the distribution network,active management and at the same time ensure the economic and safe operation of the power grid,the optimal dispatch strategy of the active distribution network is a key technology that needs to be improved.Therefore,this paper proposes to establish a two-stage distribution network optimization dispatching strategy based on the interaction of "new energy-load-energy storage".First of all,this paper studies the current optimal dispatching methods and demand response methods of active distribution networks at home and abroad.By analyzing the impact of time-sharing electricity prices on user revenue and new energy consumption,an optimized model of load demand response that takes into account the minimum user purchase cost and maximum new energy power plant revenue is established to help users increase revenue while increasing new energy consumption Accept the amount and solve the proposed optimization model using improved simulated annealing multi-objective particle swarm optimization algorithm.Secondly,studying the optimal charging and discharging strategy of user energy storage equipment under the connection of new energy.By analyzing the user energy storage response mechanism,the user energy storage system cost model,user revenue model,new energy electric field revenue model and energy storage equipment charging and discharging model after the energy storage device is connected are established,and the user comprehensive revenue and the new energy electric field revenue are established to maximize The target energy storage charge-discharge optimization model is simulated and solved to obtain the best charge-discharge strategy.Finally,a two-stage optimal dispatching scheme for active distribution network under new energy access is proposed.Based on the optimal load transfer scheme and the optimal charging and discharging strategy,the active power optimization dispatch of the previous day obtains the industrial load transfer amount and the energy storage charge and discharge amount of the previous day.Optimize the reactive power output of the output equipment to maximize the economics of its operation on the basis of ensuring the safe operation of the power grid;the daily optimal dispatch is based on short-term new energy output prediction,reducing the amount of residential and commercial loads and reactive power output Carry out control,so as to eliminate the impact of the voltage over-limit caused by the forecast error of the scenery on the safe and stable operation of the power grid,and analyze examples of the proposed optimal scheduling method.The results of the study show that the day ahead scheduling optimization method can increase the consumption of new energy while ensuring the interests of users and new energy power plants.The intra-day scheduling optimization method can effectively eliminate the impact of new energy forecast uncertainty on the operation safety and stability of the distribution network,and improve the economics and reliability of the active distribution network operation under the large-scale connection of new energy.