On-line control strategy switching method for security control device by using strategy effective conditions

Abstract

The invention discloses an on-line control strategy switching method for a security control device by using strategy effective conditions. Upper and lower power gear limits which reflect a trend mode in an on-line strategy fixed value transmitted by a scheduling end are used as the effective conditions, the on-line strategy fixed value which is received by the device or is used is subjected to effective condition inspection by the security control device according to the running mode of the device, and the device is to work in an on-line strategy fixed value mode or an off-line strategy fixed value mode is determined according to whether the on-line strategy fixed value passes the inspection or not. According to the method, the on-line strategy fixed value is inspected by using the strategy effective conditions, so that the strategy fixed value working mode is reasonably and effectively switched, and the action reliability of the security control device is ensured.

Description

technical field [0001] The invention belongs to the field of electric power system automation, and more specifically relates to an online control strategy switching method for a security control device using a strategy effective condition. Background technique [0002] The security and stability control system is an important part of ensuring the safe and stable operation of the power grid, and the security and stability control strategy is the core of the security and stability control system. According to the study of power grid topology and operation conditions, the calculation personnel or parallel computer system will store the calculated control strategies and related information of each expected fault in the historical database in a specific format on the basis of a large number of stability calculations and analysis calculations. The control strategy table is the main expression of the security and stability control strategy. Its main content includes four types of i...

AI Technical Summary

Problems solved by technology

[0004] (2) Failure mode

[0009] (1) Due to the limited capacity of the control strategy table for offline design, it is impossible to consider all the network structures and operation modes of the actual power grid. Therefore, the strategy table can only be compiled according to the section power flow and more serious operation modes during design, which is very difficult in actual operation. There may be a large overcut, and the economic performance is poor

[0010] (2) The control strategy table for offline design is mainly aimed at the operation mode that occurs during normal operation, but for the grid operation mode after multiple faults occur one after another, there is a mismatch phenomenon, which leads to the inability of the stability control system to play a role, thus affecting the grid operation. safe and stable

[0011] Several major blackouts at home and abroad reflect that the traditional emergency control device based on "offline pre-decision, real-time matching" technology can no longer adapt to the power grid operation mode after multiple faults occur one after another. There is an urgent need for an "online pre-decision, real-time "Technical online security control system

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