Branch N-1 overload prevention and control method and device based on conditional section constraint and storage medium

Abstract

The invention discloses a branch N-1 overload prevention and control method and device based on conditional section constraints and a storage medium, and aims to solve the technical problem of insufficient automation degree of overload prevention and control. The method comprises the steps of obtaining tide data; performing N-1 fast scanning according to the power flow data to obtain a weak mode set and a mode margin; when the weak mode set is empty, returning to the step 1, otherwise, constructing a conditional section constraint set based on the power flow transfer ratio; when the minimum margin in the weak mode set is smaller than a set value, obtaining an optimization model according to the conditional section constraint set, and obtaining a prevention and control decision by solving the optimization model; and carrying out conditional section distribution. According to the invention, branch N-1 overload prevention and control online decision and cooperative defense can be carriedout, real-time sharing of a power grid security boundary is realized, and a prevention and control scheme with lower control cost is obtained.

Description

technical field [0001] The invention relates to a branch N-1 overload prevention and control method, device and storage medium based on conditional section constraints, and belongs to the technical field of power system automation. Background technique [0002] As the first line of defense for the safe and stable operation of large power grids, preventive control moves the operating point from outside the stable domain to within the domain without loss of power and load before potential failures occur, and the corresponding expected failures are the first level stipulated in the regulations Standard No critical failure. With the increasing complexity of power grid operation and large changes in operation mode, conventional offline analysis and control have been difficult to meet the needs, and online adaptive optimization of preventive control has become an essential tool for power grid dispatching centers. However, due to the quality of real-time measurement data, model Fo...

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Problems solved by technology

[0004] In order to solve the problem of insufficient automation of overload prevention and control in the prior art, the present invention proposes a branch N-1 overload prevention and control method, device and storage medium based on conditional section constraints, and prevents the overload of the entire network N-1 from Transform the control problem into a section power control problem, solve the preventive control optimization model in a given space or the global space, obtain closed-loop or open-loop control measures, and distribute the conditional section constraint set to SCADA, SCED and other systems to efficiently carry out overload prevention and control Real-time sharing of power grid security boundaries

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