Parallelization method for black-start sub-systems of power grid without external support

Abstract

The invention discloses a parallelization method for black-start sub-systems of a power grid without external supply, belonging to the technical field of operation and scheduling control of the power grid. Based on a black-start research scheme of the power grid, stability check of the sub-systems, voltage calculation of a parallelization circuit of the sub-systems and parallelization simulation check of the sub-systems are performed to determine a feasible parallelization route and a recommended charging direction. Starting from the sub-system with relatively highest stability level, the parallelization with the sub-system with relatively second highest stability level is firstly performed, then the sub-systems are selected according to the sequence from the high stability level to the low stability level for parallelization, the parallelization power grid range is gradually expanded, the parallelization with the remaining sub-systems is finally performed, and then the parallelization of all the sub-systems is realized to form a whole main grid frame of the power grid. According to the parallelization method disclosed by the invention, a basic method and an alternative scheme are provided for effectively restoring the main grid frame of the power grid for a scheduling and operation mechanism of the power grid, the black-start risk is avoided, the black-start success rate is improved, and the parallelization method is favorable for promoting the black-start process of the large power grid and restoring the power consumption requirements in a larger range.

Description

technical field [0001] The invention belongs to the technical field of power grid operation and dispatch control, and in particular relates to a method for paralleling grid black start subsystems without external support. Background technique [0002] When a large-scale power outage occurs in the power grid or the power grid collapses, if the power grid recovers too slowly or collapses again during the recovery process, the power outage time of users will be prolonged and the social impact will be expanded, which will bring great losses to the national economy and people's lives, and even affect society. stable. Therefore, research on power grid black start has gradually been valued and strengthened at home and abroad. The current research on black start of power grid at home and abroad mainly focuses on three aspects: black start research plan, black start test plan and black start dispatching operation plan. Power supply and black start path selection, self-excitation an...

AI Technical Summary

Problems solved by technology

As for the juxtaposition of subsystems that have already started, the above technical specifications do not make specific requirements, and the current black start research plan does not focus on research.

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