| With the rapid development of wind power technology,a high proportion of wind power is connected to the power grid for operation.However,the strong volatility and intermittency of wind power have brought huge challenges to power grid dispatch planning,and the phenomenon of wind curtailment has intensified.The development of intelligent technology has improved the level of information interaction between the power grid and the demand side,and the demand side response resources have become more flexible and controllable,providing new ideas for promoting wind power grid-connected consumption.Therefore,it is of positive research significance to consider the demand-side response in grid dispatching with wind power.The specific research contents of this paper are as follows:Firstly,the mechanism and response methods of incentive-based demand response and price-based demand response are discussed;In order to promote the load side to provide more flexible incentive demand response resources,the transferable load compensation cost is quantified using a two-dimensional alternating function of load transfer time and load transfer power,and an interruptible load excitation mechanism considering fixed and flexible constraints is proposed;Aiming at the non-convex nonlinear constraints,the second-order cone relaxation method is used to convert them into mixed-integer second-order cone programming constraints,and a power grid dispatching model considering flexible compensation incentive demand response is established,and the contribution and confidence are used to evaluate the user response.The simulation results verify the effectiveness of the proposed new flexible compensation mechanism.Then,the fuzzy clustering method is used to divide the peak and valley periods,and the unreasonable periods are modified by the user response attribute index.At the same time,the price-based demand response model is constructed according to the theory of demand price elasticity and consumer psychology;Based on the flexible compensation incentive demand response,fully consider the complementary characteristics of the two types of demand responses,and increase the backup constraints of the two types of demand responses on the system;The random fluctuation of wind power output is described by general probability distribution,the penalty cost of wind power uncertainty is quantified by expected cost,and the standby demand of wind power on the system is represented by chance constraint,and a grid dispatch model considering demand response and wind power uncertainty is established.A joint algorithm of mixed integer linear programming and quadratic programming is proposed to solve the model.The simulation results show that the two types of demand response to participate in the grid dispatching can effectively improve the wind power consumption of the system and ensure the economy.Finally,in order to further improve the level of wind power consumption and promote the low-carbon economic development of the power grid,considering the flexible adjustment characteristics of the split-flow carbon capture power plant itself,and the principle of promoting wind power consumption is analyzed;Based on the characteristics of source-load coordination,a split-flow carbon capture power plant is introduced on the source side to cooperate with the output of wind turbines,two types of demand response mechanisms are implemented on the load side,and the reserve constraints of the demand response and split-flow carbon capture power plants on the system are increased.A low-carbon dispatch model for wind power grids that takes into account source-load complementarity is established,and the model is solved by a combined algorithm of mixed integer linear programming and quadratic programming.The simulation results show that the coordinated optimization of demand response and split-flow carbon capture power plants can further increase the wind power consumption space of the system and improve the system economy.43 pictures,12 tables,64 references. |
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