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A Distributed Economic Model Predictive Control Method Applied to Large-Scale Wind Farms

An economic model, predictive control technology, applied in the direction of adaptive control, electrical program control, general control system, etc., can solve the problem of uneven power distribution of wind farms, and achieve the purpose of solving uneven power distribution, large benefits, reducing computing burden and The effect of communication burden

Inactive Publication Date: 2020-11-13
NORTH CHINA ELECTRIC POWER UNIV (BAODING)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Aiming at the problems existing in the prior art, the present invention provides a distributed economic model predictive control method applied to large-scale wind farms to solve the problem of uneven power distribution in wind farms

Method used

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  • A Distributed Economic Model Predictive Control Method Applied to Large-Scale Wind Farms
  • A Distributed Economic Model Predictive Control Method Applied to Large-Scale Wind Farms

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] The discrete sampling time is 0.5s, the forecast time domain is 50, and the given grid demand power is 4MW. The wind speed changes in steps. The wind speed of the three fans is 7.5m / s at 0-50s. The wind speed of the first and second fans remains unchanged at 7.5m / s at 50-100s, and the wind speed of the third fan increases. As large as 9m / s, the wind speed of the first fan remains unchanged at 7.5m / s at 100-150s, the wind speed of the second fan decreases to 7m / s, and the wind speed of the third fan remains unchanged at 9m / s. Select appropriate weights, and the initial values ​​of the three wind turbines are taken as the steady state of the wind turbine model when the wind speed is 7.5m / s. Running the program of the distributed economic model predictive control method in matlab, compared with the traditional centralized predictive control method, the control performance is better and the running time is shorter.

Embodiment 2

[0045] The discrete sampling time and prediction time domain are the same as in Example 1. The wind speeds of the three wind turbines are 15m / s, 12m / s, and 17m / s in sequence from 0 to 50s. At this time, the required power of the given grid is 9MW. In 50-100s, the demanded power of the grid increases to 11MW, and the wind speed of the three wind turbines is the same as that in 0-50s. Select appropriate weights, and the initial values ​​of the three wind turbines are taken as the steady state of the wind turbine model when the wind speed is 15m / s. Run the program of the distributed economic model predictive control method in matlab, and the result proves the effectiveness of this method.

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Abstract

The invention relates to a distributed economy model prediction control method applied to a large-scale wind power plant. Under the condition that each fan in the wind power plant selects and use a comparatively complete fan model, the method solves the problems about power dynamic distribution and fan output stable tracking in the wind power plant under different wind speeds; and the maximum economic benefit of the wind power plant is guaranteed at the same time; the wind power plant control problem is solved by adopting a Nash optimal method according to a distributed structure of the fans in the wind power plant, thereby expecting to reach the optimum of the Nash equilibrium even the Pareto of the whole system; when performing the low-cost online implementation, compared with the traditional centralized prediction control method, the distributed economy model prediction control method is more excellent in control performance and shorter in operation time.

Description

technical field [0001] The invention relates to the field of wind power generation, in particular to a distributed economic model predictive control method applied to large-scale wind farms. Background technique [0002] If wind energy is to become a supplementary energy source to promote its scale effect, it needs the construction of wind farms. With the change of wind turbines, from the initial constant-speed and fixed-pitch generators to the variable-speed and variable-pitch generators commonly used today, this process represents the improvement of people's utilization of wind energy, and at the same time, the scale of wind farms has also increased. is expanding. A large wind farm may consist of hundreds of wind turbines and cover an extended area of ​​hundreds of square miles. As the output of wind power to the power grid continues to increase, the power balance within the power grid and the power distribution among the wind turbines in the wind farm become very compli...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G05B13/04G05F1/66G05B19/418
CPCG05B13/042G05B13/048G05B19/418G05B2219/25232G05F1/66Y02P90/02
Inventor 孔小兵刘向杰吴倩
Owner NORTH CHINA ELECTRIC POWER UNIV (BAODING)
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