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An Active Frequency Response Model Predictive Control Method for Large Power Grids

A technology of active frequency and frequency response, applied in circuit devices, AC network circuits, reducing/preventing power oscillation, etc., can solve problems such as power grid collapse, frequency drop at fault points, low-frequency load shedding, etc., and achieve the effect of solving control lag

Inactive Publication Date: 2021-09-17
DALIAN UNIV OF TECH
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  • Claims
  • Application Information

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Problems solved by technology

When there is a large power shortage in the system, the time-space distribution of the frequency difference is obvious, the local frequency difference perceived by the remote unit is small, the power support is small, and the frequency of the fault point drops seriously, which is very easy to reduce the load at low frequency, and even cause the grid to collapse

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  • An Active Frequency Response Model Predictive Control Method for Large Power Grids
  • An Active Frequency Response Model Predictive Control Method for Large Power Grids
  • An Active Frequency Response Model Predictive Control Method for Large Power Grids

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Embodiment Construction

[0033] In order to make the technical solutions and advantages of the present invention more clear, the technical solutions in the embodiments of the present invention are clearly and completely described below in conjunction with the drawings in the embodiments of the present invention:

[0034] Such as figure 1 A large power grid-oriented active frequency response model predictive control method is shown, which specifically includes the following steps:

[0035] S1: Establish an active frequency response control framework for power systems. Change frequency response control from passive control to active control, from parameter control to event control, from continuous quantity control to logic quantity control, from feedback control to feedforward control, in order to better optimize and coordinate various frequency adjustment methods , so as to improve the overall frequency response capability of the system and provide a theoretical reference.

[0036] S2: Classify the f...

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Abstract

The invention discloses an active frequency response model predictive control method for large power grids, the purpose of which is to first construct an active frequency response control framework based on the time-space distribution characteristics of the grid frequency, and transform the frequency response control from decentralized feedback control to centralized feedforward control , which lays a theoretical foundation for the coordinated optimization of various frequency modulation means; secondly, by using model predictive control, it not only overcomes the control lag problem caused by the existing frequency response delay, but also comprehensively considers the adjustment characteristics of each frequency modulation means and the system operation constraints. Under the premise of safe system operation, the overall frequency response capability of the system is fully utilized. This method solves the control lag problem caused by the existing frequency response delay, and coordinates and optimizes the output of each frequency modulation method, so as to maximize the overall frequency response capability of each region. .

Description

technical field [0001] The invention relates to the technical field of power systems, in particular to an active frequency response model predictive control method for large power grids. Background technique [0002] my country has a vast territory, and the distribution of energy consumption and resources is very uneven. In particular, the large-scale development of hydropower, wind power, and photovoltaic power generation in the southwest has led to large-scale energy bases. Coal power, wind power, etc. need to be sent to the load center through the power transmission network, and The energy delivery is huge. In order to solve the problems of huge long-distance transmission loss and shortage of transmission line corridors, the environment in my country is relatively poor, the DC line is polluted quickly, and the failure rate of UHV DC unipolar blocking is high; there is also the fact that the AC power grid operation technology is not mature enough. The transmission power is ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02J3/24
CPCH02J3/24H02J2203/20
Inventor 李卫东晋萃萃申家锴刘柳温可瑞
Owner DALIAN UNIV OF TECH
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