An evaluation method for the integrated power outage range of main and distribution systems considering regional interconnection and transfer

Abstract

The invention discloses an integrated power outage range evaluation method for main and auxiliary equipment considering regional interconnection and transfer, and a power outage range evaluation system is constituted based on a power outage range evaluation module. The method firstly divides the power system into regions according to the existing topological connection relationship of the power system network, and simultaneously forms a network relationship matrix and a load transferable region. When a fault or maintenance occurs in a certain area, the capacity-to-load ratio of the load transferable area is defined, and a reasonable transfer of the faulted load is realized according to this value, and the scope of the fault and power outage is evaluated. On this basis, in the process of load distribution, considering the constraints of interconnecting lines, an optimized transfer strategy based on the primary load transfer method is realized, which further reduces the scope of power outages. Simulation and system analysis show that it can effectively improve the use efficiency of the equipment, realize the reasonable transfer of the load in the fault area, and reduce the power outage loss caused by the fault or maintenance.

Description

technical field [0001] The invention belongs to the field of power system load transfer, in particular to the realization of load transfer to a fault area considering the network topology structure and power constraint conditions of a power grid system. Background technique [0002] In recent years, with the continuous growth of my country's national economy, the demand for electricity in all walks of life has grown rapidly. However, due to the relatively lagging behind in the construction of urban power grids, problems such as unreasonable power grid structure are prominent, which is difficult to meet users' demand for electric energy. quality, power supply reliability and other requirements. Especially due to the rise of the tertiary industry, the structure of power load has also changed, and the proportion of small and medium-sized users, including residents, has increased year by year, resulting in longer and longer lines in urban power distribution systems, more and more...

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Problems solved by technology

[0004] At present, the methods widely used by power companies are basically based on empirical methods to give corresponding operation plans. Therefore, it is impossible to select the optimal operation plan to transfer the most loads, that is, the blackout range is the smallest; Load, and when there is a power outage, it is impossible to realize load transfer in a coordinated manner; it is impossible to give a reasonable weight plan to achieve equipment load balance

[0005] At the same time, the schemes given by the current empirical method often require the operation dispatcher to have good experience and have a deep understanding and mastery of the system equipment, thus adding a lot of work pressure to the operation dispatcher

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