Method and device for wide-area cooperative out-of-synchronization decoupling based on correcting oscillation center voltage

Abstract

The invention discloses a wide-area cooperative out-of-synchronization disassembly method and device based on correcting oscillation center voltage. The method includes: judging whether the acquired branches to be investigated in the power system in which out-of-step oscillations occur meet the unloading threshold criterion, and adding the under-investigated branches that meet the unloading threshold criterion to the unloading A set of branches; when it is determined that the branches in the set of branches to be split constitute a split cut set, and the delay is delayed until each branch in the split cut set satisfies the constraint on the number of oscillations, a wide-area cooperative out-of-synchronization is generated Decoupling instruction; the wide-area cooperative out-of-synchronization decoupling instruction is used to make the out-of-synchronization decoupling devices of each branch in the set of branches to be decoupled act simultaneously, and each branch in the set of branches to be decoupled Road solution. This method realizes reliable, accurate and orderly decoupling after system instability, and can adapt to the complex dynamic behavior of the interconnected large power grid.

Description

technical field [0001] The invention belongs to the technical field of safe and stable operation control of electric power systems, and in particular relates to a wide-area coordinated out-of-step splitting method and device based on correcting oscillation center voltage. Background technique [0002] Affected by factors such as the continuous growth of new energy installed capacity and the increasingly prominent new features of the AC-DC hybrid structure, the disturbance behavior of large power grids is becoming more and more complex. In order to ensure the safe operation of the power grid, higher requirements are put forward for the reliability, accuracy and orderliness of the out-of-step splitting control. [0003] In order to deal with the phenomenon of out-of-step oscillation, the traditional out-of-step decoupling control usually takes a decoupling cut set of a fixed section as the decoupling point, and a decoupling device is installed on the section where the oscillat...

AI Technical Summary

Problems solved by technology

[0005] Aiming at the deficiencies of the prior art, the present invention provides a wide-area cooperative out-of-synchronization disassembly method and device based on correcting the oscillation center voltage to solve the lack of reliability, accuracy and orderliness of the out-of-synchronization operation in the prior art one or more of

Images