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Optimal power control strategy of wind turbine generator system

A control strategy and optimal power technology, applied in the control of wind turbines, monitoring of wind turbines, wind power generation, etc., can solve problems such as inability to adjust the speed, rated power shaft angle, and large output power of wind turbines

Inactive Publication Date: 2021-04-20
株洲市智汇知识产权运营服务有限责任公司
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Problems solved by technology

[0005] The present invention provides an optimal power control strategy for wind turbines, which solves the problem that the wind turbines cannot adjust the speed, rated power, and angle of the rotating shaft according to the current wind speed, so that the wind turbines can maintain the maximum power generation output power

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  • Optimal power control strategy of wind turbine generator system
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  • Optimal power control strategy of wind turbine generator system

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Embodiment Construction

[0034] The present invention will be further described below in combination with specific embodiments.

[0035] A wind turbine optimal power control strategy, comprising the following steps:

[0036] S1. Analyze the model and basic principles of doubly-fed wind turbines, such as figure 1 As shown, according to the multi-time scale characteristics of wind speed, the wind speed can be divided into steady-state wind speed and dynamic wind speed by using the principle of wind speed frequency division;

[0037] S2. Design a steady-state PI controller and a dynamic LQG optimal controller at low wind speeds; figure 2 shown;

[0038] S3. Pitch steady-state and dynamic controllers are designed under high wind speed, such as Figure 3-4 As shown; at the same time, the multi-objective hybrid control is introduced into the steady-state dynamic control, replacing the original single-objective control, and realizing the compensation between multi-objective control strategies;

[0039] ...

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Abstract

The invention aims to provide an optimal power control strategy of a wind turbine generator system. The optimal power control strategy comprises the following steps that 1, a model and the basic principle of the doubly-fed wind turbine generator are analyzed, and the wind speed is divided into a steady wind speed and a dynamic wind speed by utilizing the wind speed frequency division principle according to the characteristic that wind speed has multiple time scales; 2, a steady PI controller and a dynamic LQG optimal controller are designed at a low wind speed; 3, a variable-pitch steady and dynamic controller is designed at a high wind speed, and meanwhile multi-target hybrid control is introduced into steady and dynamic control to replace original single-target control, so that compensation among multi-target control strategies is realized; and 4, a simulation experiment is performed on the designed model by using MATLAB to verify the proposed optimal power control strategy of the wind turbine generator system. The strategy suppresses the influence of wind disturbance on the pitch angle of the wind turbine generator system and the torque of a generator, improves the stability of power control of the wind turbine generator system, and reduces the fluctuation of wind wheel rotating speed and output power.

Description

technical field [0001] The present invention relates to a microgrid control strategy, and more specifically, to a wind turbine optimal power control strategy. Background technique [0002] At present, the environmental situation is extremely deteriorating. The use of fossil fuels in various countries has caused the global environment to deteriorate day by day, and the green environment such as forests has been destroyed on a large scale. Therefore, it is imminent to discover and develop new energy sources. Using clean fuels and developing new energy sources can effectively slow down the greenhouse Gas emissions, otherwise sustainable development will be seriously threatened, which also makes countries around the world start to look for and develop new energy or the utilization and development of renewable energy. The renewable energy that has been discovered so far has relatively large untapped resources, low environmental pollution, and can be used continuously. This cost-e...

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Application Information

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IPC IPC(8): F03D7/02F03D17/00F03D80/00
CPCY02E10/72
Inventor 张铨豪
Owner 株洲市智汇知识产权运营服务有限责任公司
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