Power supply capacity configuration method for improving emergency capability of micro-grid in guaranteed power grid

Abstract

The invention discloses a power supply capacity configuration method for improving the emergency capability of a micro-grid in a guaranteed power grid. The method, which is applied to a power distribution system comprising a micro-grid, comprises the following steps: building a power supply capacity optimal configuration model which takes the maximum load power shortage rate index Flps of a guaranteed power grid and the minimum economic index Fc of the micro-grid as objectives; constructing constraint conditions of the power supply capacity optimal configuration model; acquiring target power distribution system information, and solving the target power supply capacity optimal configuration model to obtain power supply capacity configuration information; and configuring the power supply capacity. On the basis of an existing micro-grid power supply capacity optimal configuration method, the different support capacities of different power supply configurations on the guaranteed power gridare considered, the operation principle of the micro-grid and the operation mode of the micro-grid in the guaranteed power grid are analyzed and compared, and influence factors of the emergency support capability of the micro-grid are considered. Therefore, the micro-grid in the guaranteed power grid is ensured to provide effective emergency support for the guaranteed power grid, and stable operation of important loads in the guaranteed power grid is ensured.

Description

technical field [0001] The invention relates to the field of micro-grid planning, in particular to a power supply capacity configuration method for improving the emergency capability of the micro-grid in the guaranteed power grid. Background technique [0002] Affected by climatic conditions, extreme weather such as typhoons and rainstorms often occur in the southeastern coastal areas of my country, which lead to a series of large-scale power outages. In order to ensure the reliability of power supply in some core areas, the construction of urban windproof and disaster-resistant power grids has become a hot spot of attention. [0003] Guaranteed power grid refers to preventing the adverse impact of extreme weather on the distribution network, aiming at enhancing the anti-risk ability of the urban core area and shortening the recovery time of key loads under fault conditions. , The smallest scale network frame formed by the differentiated construction of the site. In the pr...

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Problems solved by technology

[0005] At present, many scholars' research on the optimal configuration of micro-grid power supply capacity mainly focuses on the following aspects: ①Take the economics of micro-grid operation as the optimization goal, and consider different optimization objects such as risk, pollution discharge, and self-reliability, and wind and solar complementarity , Coordinated operation of optical storage and other different types of power sources, and conduct research on the operation mode of micro power sources; ② Taking different indicators such as energy recovery cost, energy storage charge and discharge cycle, and renewable energy consumption as optimization objects, to optimize the capacity of micro grid power sources The research on the configuration, but the research on improving the microgrid emergency support capacity as the optimization goal is rarely involved.

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