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Wind power cluster system advanced frequency control method and system based on distributed model prediction control

A technology of model predictive control and model prediction, applied in general control system, control/regulation system, adaptive control, etc., can solve problems such as frequency advance control of wind power cluster interconnection system

Inactive Publication Date: 2018-12-25
CHINA ELECTRIC POWER RES INST +3
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Problems solved by technology

[0005] The present invention proposes a wind power cluster system lead frequency control method and system based on distributed model predictive control to solve the problem of how to realize the frequency lead control and frequency stability of the wind power cluster interconnection system

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  • Wind power cluster system advanced frequency control method and system based on distributed model prediction control
  • Wind power cluster system advanced frequency control method and system based on distributed model prediction control
  • Wind power cluster system advanced frequency control method and system based on distributed model prediction control

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[0079] Exemplary embodiments of the present invention will now be described with reference to the drawings; however, the present invention may be embodied in many different forms and are not limited to the embodiments described herein, which are provided for the purpose of exhaustively and completely disclosing the present invention. invention and fully convey the scope of the invention to those skilled in the art. The terms used in the exemplary embodiments shown in the drawings do not limit the present invention. In the figures, the same units / elements are given the same reference numerals.

[0080] Unless otherwise specified, the terms (including scientific and technical terms) used herein have the commonly understood meanings to those skilled in the art. In addition, it can be understood that terms defined by commonly used dictionaries should be understood to have consistent meanings in the context of their related fields, and should not be understood as idealized or over...

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Abstract

The invention discloses a wind power cluster system advanced frequency control method based on distributed model prediction control. The method comprises the steps that 1, a multi-dimensional state space equation of each control region in a multi-region interconnected electric power system is determined; 2, a corresponding control variable sequence is controlled by means of a Laguerre function ina distributed model prediction controller, so that parameter dimensionality reduction processing is carried out on the multi-dimensional state space equation of each control region in the multi-regioninterconnected electric power system; 3, the minimum output variable and variable quantity weighting inhibition control are determined as an optimization objective; 4, corresponding additional constraint conditions are determined according to the basic principle of wind power participating in frequency modulation and the present actual value of the active power of a time-step wind power plant; 5,an optimal control Laguerre coefficient sequence is determined as an optimal control sequence, and the optimal control sequence is applied to the system at the current time-step to carry out correction; and 6, the multi-dimensional state space equation of each control region is updated as a multi-dimensional state space equation of the next time-step.

Description

technical field [0001] The present invention relates to the technical field of frequency stability control for the integration of new energy into the power grid, and more specifically, to a method and system for controlling the leading frequency of a wind power cluster system based on distributed model predictive control. Background technique [0002] As an important and relatively mature new energy power generation technology, wind power has been widely used in my country's power grid, and has formed a large-scale cluster grid-connected scenario. However, wind power itself has random and fluctuating uncertain power output properties, and due to the isolation of frequency converters, wind power hardly participates in system frequency regulation, and the frequency regulation pressure of traditional power sources in grid-connected scenarios increases sharply. In order to ensure the safe and stable operation of the power system, it is urgent to study the active participation of...

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Application Information

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IPC IPC(8): G05B13/04
CPCG05B13/042
Inventor 孙舶皓汤涌仲悟之蓝海波刘辉叶林翟丙旭王冠楠
Owner CHINA ELECTRIC POWER RES INST
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