Combined Optimal Dispatching Of Heat And Electricity For Virtual Power Plant With Concentrating Solar Power

With the rapid development of wind power industry,China’s installed wind power capacity has ranked first in the world,but at the same time,the problem of wind abandoning is becoming more and more serious,especially in the "three north"areas with long heating period in China.The rigid constraint of cogeneration units "determining power by heat" has seriously compressed the space of wind power online.Concentrating Solar Power(CSP)generation with its flexible and controllable,the characteristics of the cogeneration with complementary wind power grid,to improve the given level of wind power.In the context of the current national policy to encourage and support wind power to participate in heating to promote its efficient utilization,this paper uses virtual power plant(VPP)technology to integrate wind farm and solar thermal power station,and introduces electric and thermal comprehensive demand response to alleviate the contradiction of electric and thermal demand,and realizes the optimal scheduling from the coordination of both sources and loads.The paper first analyzes the current research status of CSP,demand response and VPP thermoelectric combination,and summarizes the research status of wind power consumption in the optimized operation of combined thermoelectric power.Based on the feasibility analysis of CSP participating in the VPP’s combined heat and power operation,the electric heating unit is attached between the wind power and CSP to enhance the coupling between the two.By building a VPP with CSP Run the framework.Taking the minimum operating cost in the VPP’s scheduling cycle as the objective function,and taking into account the electrical and thermal constraints,the VPP’s combined thermal and power optimal scheduling model with solar thermal power plants is constructed.Simulation comparison analysis of different operation modes shows that solar thermal and wind power complementary grid-connected participation in heating energy can decouple thermoelectric characteristics to a certain extent,effectively promote wind power consumption and improve economy.Aiming at the problem that the adjustment capability of cogeneration units is still limited after thermo-electrolytic coupling,on the basis of the above research,a VPP combined heat and power optimal dispatch model that guides the load to participate in the comprehensive demand response of electric heating is constructed.This model takes as the objective function the minimum total operating cost of the VPP that incorporates the integrated electric and heating demand response cost in the dispatch period.At the same time,in order to fully consider the user’s normal energy demand,the user’s energy consumption satisfaction is included in the constraint.Through simulation analysis and comparison of VPP economy and wind power consumption under different scenarios,the validity of the proposed model is verified.The application of advanced VPP technology to integrate electric energy and thermal energy into the same framework to realize the joint optimization of heat and power dispatching can effectively reduce wind abandoning and reduce the operation cost,which provides a new solution for the thermal and power demand contradiction and a large number of wind abandoning problems existing in the "Three North" region,and has important reference significance and potential application value.