System and method for identifying long-term and short-term weak links in power grid operation status

Abstract

The invention relates to a system and method for identifying long / short-term weak links of a power grid in an operation state. The system comprises an operation mode generation module, a calculation starting module, a result reading module, a comparing module and an identification module. The method comprises the following steps: (1) periodically reading real-time operation data of the power grid, and generating an operation mode file to be analyzed; (2) starting a stability margin estimation system and BPA (Bonneville Power Administration) simulating computer software; (3) reading the simulation calculation result of the stability margin estimation system and the BPA simulating computer software; (4) comparing the simulation calculation result with relevant provisions stored in a database and relevant limit of operation limit conditions of on-site equipment, and recording over-limit results; (5) identifying the over-limit results, and judging whether the weak links belong to long-term weak spots or short-term weak spots. The method and the system have the advantages that automatic identification of the long / short-term weak links of the power grid is facilitated, and the rapidness and accuracy, and high reliability are achieved.

Description

technical field [0001] The invention relates to the technical field of power system state assessment, in particular to a system and method for identifying long-term and short-term weak links in the operating state of a power grid. Background technique [0002] There are three types of weak links in the power system: the first is short-term weak links, which appear occasionally within a year, and are related to unreasonable arrangements for operation; the second is seasonal weak links, which occur during the annual fixed The third is the long-term weak link, which occurs frequently throughout the year and is related to the load development and grid structure of the power grid. In actual operation, seasonal weak links are classified into long-term weak links and given common attention so as to propose solutions as soon as possible. [0003] In the past, the identification of weak links in the power system often relied on off-line analysis, which was analyzed in a limited and ...

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Problems solved by technology

[0004] The efficiency of this analysis method is low, and a large amount of manual analysis must be carried out to fully grasp the weak links of the power grid, otherwise the weak links analyzed are not comprehensive, and it is impossible to completely and accurately judge whether the weak links are short-term, seasonal or long-term Therefore, it is impossible to accurately judge the urgency of solving this weak link, and it is impossible to solve some weak links related to the grid structure, and it is also impossible to fully identify all seasonal weak links, so as to strengthen this weak link before the same time period in the coming year. link

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