Research On Low-carbon Economic Dispatch Of Integrated Electricity And Heating System With CSP And CHP

There are a series of problems in the winter of "Three North" region.Including serious conflicts in electricity and heating demand,a large amount of wind abandonment and environmental pollution.The reason for the above problems is that the cogeneration units have the constraint of setting electricity by heat and assume the heating task in winter,leads to the space of wind power connected to the grid shortage.At the same time,the high output of cogeneration units have resulted in the massive consumption of fossil energy and large amounts of substances harmful to the environment such as carbon dioxide.Therefore,it will be the development direction of the electric power industry in the future to increase the space of wind power connected to the grid and reduce carbon emissions.Aiming at this subject,this paper comprehensively considers the power side and load side of the power system,and conducts a coordinated scheduling study of source side and load side.First of all,build an integrated electricity and heating system model.Analyze the operating characteristics of cogeneration units and the operating mechanism of concentrating solar power stations,and explore the reasons for the lack of system flexibility caused by cogeneration units.CSP is a new form of solar power generation in recent years.It has regulating characteristics comparable to thermal power,and the generating process is clean and environmentally friendly.On this basis,as the theoretical basis for subsequent research,the joint operating characteristics of the CSP and cogeneration units in the integrated energy system are analyzed,the mathematical model of the combined operation and the operating mode of the CSP during the combined operation are obtained.Secondly,considered carbon trading mechanism in the scheduling model.Set the lowest comprehensive cost as the target to build a low-carbon economic scheduling model of integrated electricity and heating system with CSP and CHP.It is designed to perform thermo-electrolytic coupling on cogeneration units,promote wind power consumption,and reduce CO2 emissions.The comprehensive cost includes the operating cost of the thermal power units,the operating cost of the cogeneration units,the operation and maintenance cost of wind power and CSP,and the carbon transaction cost.This model takes into account factors such as electrothermal balance during system operation,and calls the CPLEX commercial solver to solve the model in the MATLAB environment,and simulates and analyzes the integrated electricity and heating system.Comparing the results of different operation modes and different scheduling models to explore the decoupling effect of CSP on the electro-thermal coupling characteristics of CHP units and verify the effectiveness of the scheduling model.Finally,in order to further absorb new energy such as wind power and improve the economics of dispatch model,the load side is taken into consideration.There are a lot of user types and power consumption modes on the load side,and there is a large scheduling development space.Considering comprehensively the price-based demand response and the thermal hysteresis of the heating system,a low-carbon economic dispatch model of the integrated electricity and heating system with the price-based demand response is constructed.This model aims at the lowest comprehensive cost including thermal power units operating cost,cogeneration units operating cost,carbon transaction cost,wind power operation and maintenance cost,and CSP operation and maintenance cost,taking into account factors such as demand response constraints.The simulation example compares several different dispatch models to verify the effectiveness of the constructed model.