Virtual power plant distributed power supply combination planning system and method

Abstract

The invention discloses a virtual power plant-based distributed power supply combination planning system and a virtual power plant-based distributed power supply combination planning method. According to characteristics of output power of the distributed power supplies and according to historical output power of the uncontrolled distributed power supplies, an interval set of the output power of the uncontrolled distributed power supplies is obtained; in a planning and scheduling cycle, with the minimum deviation between the predicted output power of a combined distributed power supply and the expected capacity of a virtual power plant as an aim, a virtual power plant-based distributed power supply combination optimizing model is established, and the optimizing model is solved to obtain an optimal combining scheme of the distributed power supplies. Through establishment of the virtual power plant, the distributed power supplies can be flexibly and efficiently integrated, so that the problem that the distributed power supplies are connected into a power grid on a large scale is solved; through reasonable selection of types and capacities of the distributed power supplies, the problems such as power supply reliability caused by uncertainty of the output power of the distributed power supplies can be solved, and the utilization ratio of the distributed power supplies can be improved.

Description

technical field [0001] The invention belongs to the technical field of distributed power optimization planning, and in particular relates to a distributed power combination planning system and method for a virtual power plant. Background technique [0002] Distributed power generation refers to small, decentralized and efficient and reliable power generation units that generate power from several kilowatts to hundreds of megawatts and are arranged near users. The main types include wind power generation, photovoltaic power generation, gas turbines, and fuel cells. Distributed power generation has the incomparable advantages of centralized power generation and can be used as a useful supplement to centralized power supply. However, compared with traditional power sources, distributed power generation has many particularities, such as volatility, decentralization, and uncontrollability. How to reduce the adverse impact of distributed generation on the power grid and maximize i...

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Problems solved by technology

[0005] In view of this, in order to solve the problem of low power supply reliability of the virtual power plant caused by the uncertainty of the distributed power output power, the present invention provides a distributed power combination planning system and method for the virtual power plant, through Integrate geographically dispersed distributed power sources of different types and capacities in the power grid, controllable loads and energy storage devices to form a virtual power plant, and use the combination of distributed power sources to predict the deviation between the output power and the expected capacity of the virtual power plant within the planning and scheduling cycle The minimum is the goal, and the distributed power combination optimization model of the virtual power plant is established to achieve optimal planning and achieve the effect of fully improving the utilization rate of distributed power and the reliability of power supply

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