Chain overload protection control method

A control method and chain overload technology, which can be applied to AC networks with the same frequency from different sources, etc., can solve problems such as the inability to effectively eliminate the overload of multiple branches, and achieve the enhancement of overload elimination capability, reduction of calculation amount, and acceleration of overload elimination. effect of speed
CN109347108AInactive Publication Date: 2019-02-15YUNNAN POWER GRID +1
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Patent Information

Authority / Receiving Office
CN Β· China
Patent Type
Applications(China)
Current Assignee / Owner
YUNNAN POWER GRID
Publication Date
2019-02-15
Estimated Expiration
Not applicable Β· inactive patent

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Abstract

The invention relates to a chain overload protection control method. The method comprises the steps of firstly, determining a key branch set according to operation information of each branch; then, calculating a pairing sensitivity of each control node in a generalized tidal current transfer region where an overload branch is located on the overload branch, and screening out effective control nodepairs to be added to a set omega; then, calculating an improved comprehensive sensitivity of each effective control node pair in the set omega, and selecting the control node pair with a maximum comprehensive sensitivity value as an optimal control unit in the cycle; then, calculating an adjustment amount deltaPij of the control node pairs; performing deloading control according to deltaPij, refreshing a branch tidal current by use of a sensitivity relation and correcting a node output, and simultaneously judging whether an overload phenomenon is eliminated or not. With the design, not only can the calculated amount of emergency control be greatly reduced, but also the overload elimination capability is enhanced and the overload elimination speed is accelerated.
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Description

technical field

[0001] The invention belongs to the technical field of power system operation and control, and in particular relates to an anti-chain overload control method. Background technique

[0002] The rapid development of the electric power industry has provided a strong guarantee for social progress, productivity development and national security, but its own safe operation problems have also emerged day by day. Large-scale interconnection of power grids has become the general trend, and the dynamic behavior of the system has become more and more complex. In large-scale power grids with increasingly complex grid structures, power flow transfer overload has become the main booster for the development of cascading failures, while emergency control is still It is an important means to prevent blackout accidents.

[0003] Branch overload emergency control belongs to the category of active safety correction. By taking effective measures to quickly reduce the power flow ...

Claims

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