Economic evaluation and analysis method for guaranteeing reliable power supply in regional autonomous power grid mode

Abstract

The invention discloses an economic evaluation and analysis method for guaranteeing reliable power supply in a regional autonomous power grid mode. The method comprises the following steps: S1, obtaining a grid structure of the regional autonomous power grid, time sequence data of a node power supply and a load, and construction reinforcement cost data of energy storage and a power line; S2, establishing an autonomous capability and economy evaluation index system of the regional autonomous power grid; S3, establishing an energy storage configuration and line reinforcement optimization model for ensuring reliable power supply of the important load under the extreme event; S4, establishing a solution algorithm of the optimization model; S5, establishing typical extreme event fault scenes, and solving to obtain energy storage configuration and line reinforcement schemes under each typical fault scene; and S6, calculating the regional autonomous ability and economic index of each scheme in the S5, performing comparison and analysis, and selecting an optimal scheme according to requirements. The problems that regional autonomous power grid autonomous capability evaluation indexes are one-sided and incomplete, the considered fault scene is simple and ideal, and the adopted reliable power supply guaranteeing scheme is high in cost and not suitable for popularization are solved.

Description

technical field [0001] The invention belongs to the field of distribution network configuration planning, and in particular relates to an economic evaluation and analysis method for ensuring reliable power supply in a regional autonomous power grid mode. Background technique [0002] Extreme events such as typhoons and earthquakes, which are less likely to occur but cause great disasters, have caused serious damage to the power grid and brought huge economic losses. For power grid faults caused by extreme events, the traditional power system "three lines of defense" (referring to the strategy of responding to faults by relying on rapid protection of the power grid, preventive control, stability control, out-of-synchronization and emergency control of voltage and frequency) and " N-1" safety judgment criteria (after any component in the power system is disconnected due to a fault in normal operation mode, the power system should be able to maintain stable operation and normal...

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Problems solved by technology

[0005] In view of the deficiencies in the prior art, the purpose of the present invention is to provide a regional autonomous power grid model to ensure reliable power supply economics evaluation and analysis method, which solves the fault scenario considered in the prior art for the one-sided and incomplete evaluation indicators of the autonomous capacity of the regional autonomous power grid Simple and ideal, the cost of the guaranteed and reliable power supply scheme adopted is high and it is not suitable for promotion

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