Low-Carbon Economic Dispatch Considering Carbon Capture Unit And Demand Response Under Carbon Trading

As a major source of carbon emissions,the power industry is facing enormous pressure to cut carbon emissions.In the power system dispatching,it is of great significance to deal with these problems:how to coordinate low carbon or zero carbon resources of power generation side and demand side,how to give consideration to economic dispatch and low carbon scheduling,how to deal with the uncertainty of carbon price in carbon trading market.The carbon emission characteristics of different power sources should be taken into consideration in low carbon economic dispatching.And generation resources can be divided into three categories respectively:high carbon emissions,low carbon emissions and zero carbon emissions.In carbon trading mechanism,carbon trading costs is introduced into the economic objective function;the demand side response is taken as schedulable resource;the minimum sum costs are taken as objective function,which the costs includes demand response in dispatching,conventional thermal power units cost,fuel costs of carbon capture unit and carbon trading cost.A low carbon economy scheduling model is established with consideration of carbon capture unit and demand response.Take a certain carbon price level as a determined carbon price,and calculate the output in the scheduling period at different carbon emission levels of high carbon,low carbon and zero carbon power generation resources.The results show that when the carbon price is constant in dispatching period,high carbon emission unit will reduce output at low load rate;low carbon emissions and carbon capture power plant units are fully utilized in the period;the demand response is called high cost,but it is still used at high loads with its zero carbon emissions.With the change of the carbon market price,the carbon emissions decreases with the increasing carbon price in dispatching period,but the cost of power generation,demand response capacity and energy consumption of carbon capture unit will increase.Considering that the price of the carbon market is affected by policy,with the violation affected by total carbon emissions,seasonal climate and other factors,conditional risk value method is used to deal with the randomness of carbon trading cost and a low carbon economic dispatching model is established considering uncertain carbon prices.In order to solve the problem of the carbon cost function described by the method of Conditional Value at Risk,the method is combined with the Monte Carlo simulation and the analytical method,the function is discretized,and the YALMIP software is applied to solve the proposed model easily.The results show that with the continuous improvement of confidence level and the tendency of avoiding risk at power system,the output of carbon capture unit and net power output of generation unit are gradually decreasing;the demand response quantity of load side and energy consumption of carbon capture unit are also gradually decreasing.However,the net carbon emissions of system increase and the carbon trading cost increases.Comprehensive results show that it is more realistic with consideration of uncertain carbon price in low carbon economic dispatching.