A Comprehensive Decision-Making Method for Online Preventive Control Considering Multiple Types of Security and Stability Constraints

Abstract

The invention discloses an online preventive control decision-making method that satisfies multi-type security and stability constraint requirements, and belongs to the technical field of power system security and stability preventive control. Aiming at the characteristics of multiple types of security and stability problems intertwined in large power grids and short online decision-making time, the present invention proposes 11 types of security and stability control performance indicators for transient, dynamic and static security and stability by generator, load and capacitive reactor adjustment measures, based on The security and stability comprehensive performance index queues and screens different types of measures respectively, enumerates and combines the screened measures by type, applies the cluster computing platform, and realizes the quantitative evaluation of the security and stability of the enumerated and combined measures; the transient, dynamic security and stability The comprehensive decision-making calculation is taken as a stage, and the static safety decision-making calculation is taken as a separate stage. The transient and dynamic safety and stability problems are prioritized. The calculation strategy of loop iteration can realize the fast and efficient online preventive control considering multiple safety and stability constraints. Optimize decisions.

Description

technical field [0001] The invention belongs to the technical field of power system safety and stability prevention control, more precisely, the invention relates to a comprehensive decision-making method for large power grid online prevention control considering multiple safety and stability constraints. Background technique [0002] The security and stability characteristics of large power grids are complex, and transient, dynamic, and static security and stability issues are intertwined. Effective adjustment measures for one type of security and stability may have adverse effects on another type of security and stability. Most of the existing methods are designed to solve a single security and stability problem. If you simply connect different types of security and stability methods together, it is very likely that you will not be able to find a comprehensive optimization that solves multiple types of security and stability problems at the same time. decision making. [...

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Problems solved by technology

[0002] The safety and stability characteristics of large power grids are complex, and transient, dynamic and static safety and stability problems are intertwined. Effective adjustment measures for one type of safety and stability may have adverse effects on another type of safety and stability

Most of the existing methods are designed to solve a single security and stability problem. If you simply connect different types of security and stability methods together, it is very likely that you will not be able to find a comprehensive optimization that solves multiple types of security and stability problems at the same time. decision making

[0003] The patent "on-line preventive control method for large power grid based on static and transient safety and stability modes" (ZL200710135089.2) proposes a preventive control decision calculation for transient power angle stability first, then transient voltage and frequency safety and stability, and equipment overload safety Strategy is a comprehensive optimization decision-making method that connects various safety and stability preventive control decision-making methods in series, and then achieves coordination among various safety and stability problems through iteration. This method is not much different in these types of safety and stability modes In other cases, a relatively optimized comprehensive decision can be obtained, but in other cases, only a feasible solution with a relatively large control cost can be obtained, or even a feasible solution cannot be obtained.

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