A Coordinated Voltage Control Method Based on Ladder Optimal Weights

A technology of coordinated control and weighting, applied in general control systems, control/regulation systems, instruments, etc., can solve the problems of increased optimization complexity, adverse optimization global effects, model control effect deviations, etc., to reduce optimization complexity, Avoid the problem of decision set explosion and reduce the effect of optimization calculation

Active Publication Date: 2021-07-09
ELECTRIC POWER RESEARCH INSTITUTE OF STATE GRID SHANDONG ELECTRIC POWER COMPANY +2
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Problems solved by technology

Under this time scale, the uncertainty characteristics of the system have a significant impact on the control decision-making, and the traditional single-step optimization method based on time-section data is difficult to deal with the control effect deviation caused by the model mismatch problem.
Model predictive control (MPC) adopts multi-step optimization in rolling time domain, which can effectively deal with system uncertainties. It has been widely used in medium and long-term voltage stability control problems. However, with the increase of system scale, the optimization complexity will be significantly increases, there is a risk of decision set explosion
[0003] The existing partition optimization algorithm has the problem of regional interconnection and independent control; the selection of a single pilot node in the region is not conducive to optimizing the overall effect; and when the voltage weak point appears on the partition boundary, there will be unreasonable selection of voltage regulation controllers. situation, affect the voltage control effect

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  • A Coordinated Voltage Control Method Based on Ladder Optimal Weights
  • A Coordinated Voltage Control Method Based on Ladder Optimal Weights
  • A Coordinated Voltage Control Method Based on Ladder Optimal Weights

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[0037] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0038] It should be pointed out that the following detailed description is exemplary and intended to provide further explanation to the present application. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs.

[0039] It should be noted that the terminology used here is only for describing specific implementations, and is not intended to limit the exemplary implementations according to the present application. As used herein, unless the context clearly dictates otherwise, the singular is intended to include the plural, and it should also be understood that when the terms "comprising" and / or "comprising" are used in this specification, they mean There are features, steps, operations, means, components and / or combinatio...

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Abstract

The invention discloses a voltage coordination control method based on ladder optimization weights. In the optimization scenario after large-scale system disturbance and failure, the invention can control the optimization scale by identifying the key control objectives and measures to restore or stabilize the voltage. A relatively fixed range can significantly reduce the amount of optimization calculation and effectively avoid the problem of decision set explosion. At the same time, the information required for setting the ladder optimization weight in the present invention is the process quantity of model predictive control calculation, which requires almost no additional calculation time. Based on The trajectory sensitivity method transforms the complex nonlinear programming problem into a relatively easy-to-handle mixed integer programming problem, which greatly reduces the optimization complexity.

Description

technical field [0001] The invention relates to a voltage coordination control method based on ladder optimization weight. Background technique [0002] The slow dynamics of medium and long-term voltage stability problems last for several seconds to several minutes, and timely control measures are required to prevent the development of system voltage deterioration. Under this time scale, the uncertainty characteristics of the system have a significant impact on the control decision-making, and the traditional single-step optimization method based on time-section data is difficult to deal with the control effect deviation caused by the model mismatch problem. Model predictive control (MPC) adopts multi-step optimization in rolling time domain, which can effectively deal with system uncertainties. It has been widely used in medium and long-term voltage stability control problems. However, with the increase of system scale, the optimization complexity will be significantly inc...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G05B17/02
CPCG05B17/02
Inventor 张岩刘萌张青青张高峰王庆玉王华佳
Owner ELECTRIC POWER RESEARCH INSTITUTE OF STATE GRID SHANDONG ELECTRIC POWER COMPANY
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