A power capacity allocation method to improve the emergency capability of the microgrid in the guaranteed power grid

Abstract

The invention discloses a power supply capacity allocation method for improving the emergency capacity of a micro-grid in a guaranteed bottom grid. The method is applied to a power distribution system containing a micro-grid, and includes establishing the maximum load shortage rate index F of the guaranteed bottom grid. lps And microgrid economic index F c The optimal configuration model of power capacity with the minimum as the goal; construct the constraints of the optimal configuration model of power capacity; obtain the information of the target power distribution system, solve the optimal configuration model of the target power capacity, and obtain the configuration information of power capacity; configure the power capacity. On the basis of the existing micro-grid power supply capacity optimization configuration method, considering the different support capabilities of different power supply configurations for the guaranteed power grid, analyzing and comparing the operating principle of the micro-grid and the operation mode of the micro-grid in the guaranteed power grid, considering the micro-grid The factors affecting the emergency support capacity ensure that the microgrid in the guaranteed power grid can provide effective emergency support for the guaranteed power grid, and ensure the stable operation of important loads in the guaranteed power grid.

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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