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Disturbance sensing control method for mppt of direct drive pmsm wind power generation system

A technology of a wind power generation system and a control method, which is applied to the control of wind turbines, wind turbines, motor generators, etc., and can solve problems such as changing the actual operating curve, reducing the power generation efficiency of the unit, and affecting the output power of the unit, and achieves a simple structure , good real-time performance and strong anti-disturbance ability

Inactive Publication Date: 2019-08-27
CHANGSHA UNIVERSITY OF SCIENCE AND TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, it is not easy to obtain the relevant curve of the actual unit accurately, and at the same time, changes in external environmental factors can easily change the actual operating curve to a large extent, which will affect the output power of the unit and reduce the power generation efficiency of the unit

Method used

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  • Disturbance sensing control method for mppt of direct drive pmsm wind power generation system
  • Disturbance sensing control method for mppt of direct drive pmsm wind power generation system
  • Disturbance sensing control method for mppt of direct drive pmsm wind power generation system

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Effect test

example 1

[0141] Example 1. When the wind speed is 7m / s, the permanent magnet synchronous generator speed ω m , quadrature axis current i q , Wind turbine output torque T m and generator electromagnetic torque T e , wind energy utilization coefficient C p isocurve such as Figure 6 . Figure 6 It shows that the control method of the present invention not only has fast response speed and high steady-state tracking accuracy, but also the maximum wind energy utilization coefficient C of the wind turbine pmax reached 0.483.

example 2

[0142] Example 2. At the moment of 2.5s, when the wind speed suddenly drops from 7m / s to 6m / s, the speed of the permanent magnet synchronous generator ω m , quadrature axis current i q , Wind turbine output torque T m and generator electromagnetic torque T e , wind energy utilization coefficient C p isocurve such as Figure 7 . Figure 7 It further shows that the control method of the present invention not only has fast response speed and high steady-state tracking accuracy, but also the maximum wind energy utilization coefficient C of the wind turbine pmax It reaches around 0.483. Figure 7 It is verified that the MPPT control method of the present invention has fast tracking performance and high tracking accuracy when the wind speed changes suddenly.

example 3

[0143] Example 3. In the extreme case of rated random wind speed and sudden change of wind speed, the random wind speed v, permanent magnet synchronous generator speed ω m , quadrature axis current i q , Wind turbine output torque T m and generator electromagnetic torque T e , wind energy utilization coefficient C p isocurve such as Figure 8 . Figure 8 It further shows that the control method of the present invention not only has fast response speed and high steady-state tracking accuracy, but also the maximum wind energy utilization coefficient C of the wind turbine pmax It can reach 0.478~0.488. Figure 8 It is verified that the MPPT control method of the present invention has fast tracking performance and high tracking accuracy in the extreme case of random wind speed mutation.

[0144] 8. Conclusion

[0145] PID controller, sliding mode controller (SMC) and active disturbance rejection controller (ADRC) based on cybernetics strategy (elimination of error based on ...

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Abstract

Aimed at solving the problems that a traditional PID has the parameters hard to set, various improved PIDs are large in calculation amount, and poor in disturbance rejection capacity, a sliding-mode control (SMC) has the high-frequency chattering, according to an active-disturbance-rejection controller (ADRC), the calculation amount is too large, and gain parameters are too many, the invention provides a disturbance perception control method of the direct drive PMSM wind power generation system MPPT. Controller parameters have large margin, and the beneficial effects the calculation amount issmall, the control precision is high, and the anti-disturbance capability is high are achieved; the global asymptotic stability is achieved; particularly, when the outer environment is seriously changed, the gain parameters do not need to be subject to online stabilizing, the control strategy of the classic control theory and the modern control theory is completely overturned, and the method has the important theory significance and application value in control over direct drive PMSM wind power generation system MPPT.

Description

technical field [0001] Wind power generation system, motor operation and control. Background technique [0002] Wind energy, as one of the green energy with the most economic value in today's society, has been widely concerned and vigorously developed by countries all over the world. With the increasing installed capacity of permanent magnet direct drive wind power generation systems, how to reliably and effectively utilize wind energy has become a research hotspot in wind power generation technology. Large-scale machine and intelligent control technology are two major development trends of wind power generation system today. Maximum power point tracking (MPPT) is the most widely used technology for wind turbine control. At present, regarding the maximum power point tracking control, scholars at home and abroad have successively proposed algorithms such as the optimal tip speed ratio method, the power signal feedback method, the hill-climbing search method, the optimal tor...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02P21/22H02P21/13H02P27/08
CPCF03D7/0276G05F1/67Y02E10/72
Inventor 曾喆昭
Owner CHANGSHA UNIVERSITY OF SCIENCE AND TECHNOLOGY