Wind power grid-connected system node short period reliability assessment method considering demand response

Abstract

The invention relates to an electric power system reliability analysis method, and specifically relates to a wind power grid-connected system node short period reliability assessment method considering demand response DR, solving the problem that a current assessment method does not analyze the short period reliability influence, is hard to play a positive role of reliability of DR projects, doesnot employ all the DR projects, does not provide a control strategy, is short of reasonable planning, and cannot describe the influence of implementation of all the DR projects on the power grid reliability level. The wind power grid-connected system node short period reliability assessment method considering demand response includes the steps: 1) performing user demand response load modeling; 2)establishing a DR project combination priority hierarchy model based on a hierarchy analysis method; and 3) performing wind power grid-connected system short period reliability assessment consideringthe demand response. The wind power grid-connected system node short period reliability assessment method considering demand response has the advantages of providing optimal DR project combination reference for operation and scheduling, proving the effectiveness of implementing the DR projects, reducing the power failure accidents, improving the reliability level, reducing the cost, alleviating the influence of wind power fluctuation, improving the consumption capability, providing decision guidance, and making up the defects of a traditional assessment method.

Description

technical field [0001] The invention relates to a reliability analysis method of a power system, in particular to a short-term reliability evaluation method for wind power grid-connected system nodes taking into account demand response. Background technique [0002] Demand response (DR) is defined as the electricity demand that users respond to by changing their fixed consumption patterns when electricity prices rise or system reliability is threatened. The output of wind power is intermittent and unpredictable, and the fluctuation of wind power output increases the peak-valley difference of the power grid, which has brought a huge impact on the reliability of the system. Introducing DR into the wind power grid-connected system can guide users to reduce or transfer power loads, improve load consumption curves, and improve system reliability; on the other hand, it can ease the demand for grid capacity and delay the investment in energy storage equipment and power plant constr...

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Problems solved by technology

[0006] The present invention solves the problem that the existing wind power grid-connected system reliability evaluation method does not analyze the impact of DR projects on short-term reliability from the perspective of nodes, and it is difficult to fully exert the positive effect of DR projects on the reliability of wind power grid-connected systems. All DR projects have not proposed a control strategy for using DR project combinations, lack of reasonable planning for all DR projects, and cannot clearly describe the impact of implementing all DR projects on the reliability level of the power grid, providing a wind power that takes demand response into account Short-term reliability assessment method for grid-connected system nodes

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