Main power distribution integrated power failure range assessment method considering regional interconnection transfer

Abstract

The invention discloses a main power distribution integrated power failure range assessment method considering regional interconnection transfer. A power failure range assessment system is formed based on a power failure range assessment module. The method comprises the following steps: firstly, partitioning the power system according to the existing power system network topology connection relationship, and simultaneously forming a network relationship matrix and a load transferable region; when a certain area has a fault or is overhauled, the capacity-to-load ratio of the load transferable area is defined, reasonable transferable of the fault load is achieved according to the magnitude, and the fault power failure range is evaluated. On the basis, in the load distribution process, the constraint conditions of the interconnection lines are considered, the optimized transfer strategy based on the one-time load transfer method is achieved, and the fault power failure range is further narrowed. Simulation and system analysis show that the use efficiency of equipment can be effectively improved, reasonable load transfer and consumption of a fault area are achieved, and therefore powerfailure loss caused by faults or overhaul is reduced.

Description

technical field [0001] The invention belongs to the field of power system load transfer, and in particular relates to realizing load transfer for a fault area in consideration of 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 from all walks of life has grown rapidly. However, due to the relatively lagging construction of urban power grids, problems such as unreasonable grid structures have become more prominent, which makes it difficult to meet users' needs for electricity. quality, power supply reliability, etc. Especially due to the rise of the tertiary industry, the structure of power load has also changed. 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 nodes, and i...

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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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