Power grid planning method considering power transmission and distribution price

Abstract

The invention discloses a power grid planning method considering the power transmission and distribution price. The current planning systems including the power grid planning rule, the investment deciding method and the power grid planning method fail to meet new requirements, of power transmission control and constraint and connection of new energy into the grid, of complex and undetermined environments. The provided power grid planning method comprises steps of: constructing a power grid planning model considering the power transmission and distribution price and establishing constraint conditions of the power grid planning model; using a stochastic load flow method based on the half invariant method to examine the constraint conditions and converting the nondeterminacy probability optimization problem into determinacy optimization problem; and using an improved NSGA-II algorithm to solve the power grid planning mode, and solving an optimal power distribution network extension planning scheme. According to the invention, by use of the power grid planning mode, checking of the cost of the power grid and the power transmission and distribution earnings in the planning process is achieved; invalid cost of power grid enterprises is reduced; and economic benefit of a power grid planning scheme based on market-oriented construction of the electric power is increased.

Description

technical field [0001] The invention relates to the technical field of power systems, in particular to a power grid planning method considering power transmission and distribution prices. Background technique [0002] With the continuous development of the world economy, the energy crisis and environmental pollution have received widespread attention from all walks of life. In recent years, due to the advantages of cleanliness, environmental protection and flexibility, distributed power generation has developed rapidly. The most notable feature of the renewable energy type distributed generation (DG) is that it is affected by the climate, and the power generation output is random. The access of distributed generation has brought new problems to the power system planning. In distribution network planning, it is necessary to fully consider the uncertainty of distributed power generation output, comprehensively consider the relationship between economics and security risks, an...

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Problems solved by technology

[0010] In order to overcome the deficiencies in the above-mentioned prior art, the present invention provides a power grid planning method that considers the price of transmission and distribution, which uses the opportunity constraints that include the averaged social cost objective function of power supply, the profit objective function of transmission and distribution, and the network loss constraints. A planning model to address grid expansion planning in the context of transmission and distribution tariff reforms

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