Optimal Scheduling Of Combined Heat And Power Of Virtual Power Plant Based On Hybrid Energy Storage

In recent years,our country’s "Three Norths" area has made good use of regional characteristics to advance new energy sources such as wind and solar energy.In a short term,the wind power installed capacity and the photovoltaic power generation installed capacity have developed to the leading level in China,But it’s energy composition is not very standardized,There are too many thermal power generators,lack of flexible peak-shaving power supply capable of rapid peak-shaving.In the "Three Norths" area,the winter temperature is generally low and there is a need for heating,therefore,Most units in the area are thermal power plants,Combined heat and power(CHP)units in order to meet the heating needs usually operate in a thermo-electric coupling mode of "electricity by heat" or "heat by electricity",This coupling method greatly reduces the peak shaving capacity of the CHP unit,Lead to waste of wind power and photovoltaics.In order to ensure the safe and efficient access of new energy generation and electricity consumption.Reduce the waste of wind and photovoltaics energy,This article starts with the optimal scheduling of cogeneration,Relying on the virtual power plant(VPP)platform,Did a joint study on optimal scheduling of hybrid energy storage virtual power plant.This article first lead into the concept of virtual power plant,The VPP includes wind power plant,photovoltaic power plants and thermal power plants,Add Thermal storage tank,heat storage electric boiler,energy storage battery hybrid form energy storage system,Under this premise,with the highest economic benefits as the target of optimize,Integrate the hybrid energy storage system,Established a virtual power plant combined heat and power optimal dispatch model,The selected model solving method is adaptive immune genetic algorithm.Simulation results indicate,Thermal storage tank,heat storage electric boilers and hybrid energy storage systems can all enhance take advantage of new energy.Among them,the hybrid energy storage system can not only effectively help relieve the fluctuation of wind power and photovoltaic electricity output,but also the system has the highest economic profit and new energy utilization rate;Finally,Analyzed when according to the actual investment cost and wind power and photovoltaic waste,How to select the method and capacity of the additional heat source.Use limited investment costs to obtain higher economic benefits.Secondly,for the heat and electricity decoupling in the "power by heat" mode cannot fully utilized the wind power and photovoltaic electricity.Discussed the decoupling problem under the "electricity constant heat"operation mode,First,a thermoelectric unit model based on zero output conversion of low pressure cylinder is established.On this basis,Set up an VPP optimal dispatch model.The model put heat storage device regards Supplementary heat source.The selected model solving method is adaptive immune genetic algorithm.Simulation results indicate,Based on the decoupling of "heating by electricity".The virtual power plants Including heat and electricity optimal dispatching can full use of wind power and photovoltaic power generation.In ensure the highest economic benefits premise,the utilization rate of new energy has been greatly enhanced.Finally,for the heat and electricity decoupling in the "heating by electricity"mode in Chapter 3,There may be problems such as insufficient heat supply and high investment costs for external equipment such as heat storage tanks.Introduce user side use electricity and heat comfort standards,Premeditate the green power certificate trading system,Established a VPP cogeneration optimal dispatch model considering user comfort and green certificate trading,The selected model solving method is adaptive immune genetic algorithm.Simulation results indicate,After considering user comfort and green certificate transactions,It can effectively make up for the shortcomings of insufficient heat supply in the high generation stage of new energy,enhance economic efficiency,And compared with simply considering electricity,thermal comfort or green certificate transaction systems,considering both comfort and green certificate transactions has a better effect.