Research On The Control Method Of Intelligent Prosumer Unit

The development of distributed generation and electric vehicles has effectively alleviated the increasingly serious energy crisis.As a carrier of distributed energy,the home is no longer the role of a traditional consumer of electrical energy,but integrate electric energy production and consumption.A unit that is both a consumer of electricity and a producer of electricity is called a Prosumer.In the micro-grid,large-scale grid connection of the Prosumers will cause problems such as bus voltage fluctuations and demand-side power disorder fluctuations.In order to solve the problem of Prosumer grid-connected and improve the capacity of the microgrid for DG,the power control method of the Prosumer has received extensive attention from scholars at home and abroad.However,most scholars use a large number of energy storage devices to manage the energy of the Prosumers,which is costly and has limited capacity.Therefore,to solve the above problems and reduce the grid-connected influence caused by the energy fluctuation of the Prosumer,this paper builds a Smart Prosumer(S-Prosumer)model based on the Smart Load(SL)power control method and proposes its control method.The main contents of this paper are as follows.Firstly,the impact of the scale of the Prosumer on the microgrid is studied.Analyze the microgrid grid-to-island and island-to-grid switching state,and build models for the Prosumer from three aspects: household photovoltaic power generation model,electric vehicle household charging load model,and household load model.The influence of the Prosumer grid-connected of is analyzed through simulation.Secondly,the method of single S-Prosumer adaptive control is studied.The SL power control model is established,and then propose the SL active power control method.Based on the SL power control model,put forward S-Prosumer structural model.After that,a single S-Prosumer adaptive control method using a PSO optimization algorithm.A simulation is conducted to verify the method above.Thirdly,the method of multi-S-Prosumers grid-connected control is studied.Analyze the principle of multi-agent technology,and based on this,design a multi-S-Prosumer hierarchical control architecture.Based on the control method of the tree-shaped agent and the ring-shaped agent,the control strategy of the upper instruction layer and the lower execution layer are studied respectively.Besides,a multi-S-Prosumer hierarchical grid-connected collaborative control method is proposed,and the effectiveness of control strategies is verified by simulation.Finally,the multiple S-Prosumer control method is researched in the micro-grid switching state.The control method of multiple S-Prosumers connected to the microgrid is studied under the mode of the grid-to-island and island-to-grid switching state.Based on the MATLAB / Simulink simulation platform,the S-Prosumer control methods under the above two switching operation states are simulated and verified,which effectively solves the problem of the grid connection of the Prosumer,and also solves the power fluctuation issues of the micro-grid bus when the micro-grid operation state is switched.