Method and system for determining distribution points of newly-added black-start units

Abstract

The invention provides a method and system for determining distribution points of newly-added black-start units. The method comprises the steps: obtaining topology information of an existing black-start unit network as an initial topology; collecting the capacity and average reactance of the black-start unit of the initial topology, and calculating the initial strength of the initial topology according to the capacity and average reactance of the black-start unit; calculating the target strength of the target black-start unit networking topology of the to-be-selected black-start unit increasing scheme; respectively calculating a strength difference value between the target strength of each to-be-selected black-start unit increase scheme and the initial strength; respectively calculating the ratio of the strength difference value of each to-be-selected black-start unit increase scheme to the corresponding investment cost, and selecting the to-be-selected black-start unit increase schemewith the maximum ratio as an execution scheme. According to the method for determining the newly-added black-start unit distribution points, a quantitative calculation means is provided for determining the black-start unit distribution points, and distribution point selection is more scientific and reasonable.

Description

technical field [0001] The present invention relates to the technical field of black start, in particular to a method and system for determining the layout of newly added black start units. Background technique [0002] With the rapid development of the economy and society, the installed capacity and load of the power system continue to reach new highs; and the rapid development of UHV AC and DC transmission, large-scale wind power generation, photovoltaic power generation, and a large number of micro-grids connected to the power grid, the dynamic characteristics of the entire power system Great changes have taken place, and the operating point of the power system is getting closer to its stable limit point. In this case, there is an ever-increasing risk of a system blackout due to power failure or improper operation. [0003] After a major power outage occurs in the power system, the economic and social impact it brings has a great correlation with the power outage time. T...

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Problems solved by technology

[0004] In order to improve the recovery speed of the system after a power outage, it is necessary to add black start units to the system, but the research on the placement of new black start units is still in its infancy, and most of them rely on operating experience to determine the placement of new black start units. Analytical means and methods

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