Research On Wind Power Absorption Model Considering Uncertainty Of Demand Response

Under the dual pressures of energy shortage and environmental pollution,the development of wind power,as the first clean and harmless renewable energy,has become an effective way to solve the crisis.However,with the large number of wind power connected to the grid,its inherent inverse peak regulation and other characteristics bring great challenges to the safe and stable operation of the power system.Therefore,demand response technology is introduced to encourage users to participate in the system dispatch,realize the two-way interaction between the generation side and the user side,and improve the economic stability of the system operation.According to different user response modes,demand response can be divided into price-based demand response and incentive-based demand response.Price-based demand response induces users to adjust their electricity consumption behavior according to electricity price through price signal.Relative incentive-based demand response has a good peak-shaving and valley-filling effect.The price-based demand response is introduced and modeled in the power system with wind power.The price elasticity matrix method,which is used to express the response of electricity to electricity price in the power system,is selected.In view of the matrix obtained from historical data,considering the uncertainty of the functional relationship between electricity quantity and electricity price,the wind power absorption price regulation model considering the randomness of demand response is established.Conditional risk value method is introduced to deal with the random variables in the model,which is transformed into a deterministic model.It is helpful to guide users to participate more actively in demand response to cut peak and fill valley,promote wind power absorption and realize the economic operation of the system by setting reasonable electricity price.In the integrated energy system,considering the variation of electricity consumption with electricity price,the original price elasticity coefficient matrix is extended to deal with the coupling effect of electricity,gas and heat in the integrated energy.The relationship between gas price and gas quantity,heat price and heat is added into the matrix to form an energy matrix.The uncertainty of electricity,gas price and wind power output is taken into account to reduce the operating cost of the system.To minimize the sum of power shortage cost and wind abandonment cost,a wind power absorption optimization model for integrated energy system considering uncertainties in energy price is formed,and the influence of wind power penetration rate on the model operation results is considered in the simulation.In the power system with wind power,considering the uncertainty of wind power and demand response is closer to reality,and using conditional risk value method to depict its risk.Choosing the confidence level according to experience can promote wind power absorption and increase the income of power grid.In the integrated energy system,considering the power-gas-heat coupling and price stochastic performance can reduce the cost of system operation and wind abandonment.In the vigorous development of wind power.