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DSP based vector control system for variable-speed constant-frequency double-feed wind driven generator

A double-fed wind power generation and vector control technology, which is applied in vector control systems, motor generator control, control systems, etc., can solve the problems of inductance change, resistance change, and difficulty in vector control of motor parameters, achieving fast response speed and improved Speed ​​and precision, the effect of broad market application prospects

Inactive Publication Date: 2012-01-18
TIANJIN UNIVERSITY OF TECHNOLOGY
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AI Technical Summary

Problems solved by technology

However, during the operation of the generator, due to the saturation of the magnetic circuit, the inductance will change, and the temperature rise will cause the resistance to change, which brings difficulties to the vector control that depends on the motor parameters.
At the same time, if a commercial unit needs to measure its parameters and modify the controller for each generator, this will bring additional costs

Method used

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  • DSP based vector control system for variable-speed constant-frequency double-feed wind driven generator
  • DSP based vector control system for variable-speed constant-frequency double-feed wind driven generator
  • DSP based vector control system for variable-speed constant-frequency double-feed wind driven generator

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Embodiment

[0024] Embodiment: a kind of variable-speed constant-frequency double-fed wind-driven generator vector control system based on DSP (see figure 1 ), including a doubly-fed asynchronous generator, is characterized in that it includes a detection circuit module and a control unit; wherein the detection circuit includes a current detection unit, a voltage detection unit and a rotational speed detection unit; the input terminals of the control unit are respectively connected to the current The detection unit, the voltage detection unit and the output end of the speed detection unit are connected, and the output end is connected to the input end of the doubly-fed asynchronous generator; the input end of the detection circuit module receives the voltage, current and speed sent by the doubly-fed asynchronous generator Signal.

[0025] The current sense circuit (see figure 2 ) is composed of resistor R1, resistor R2, resistor R3, resistor R4, resistor R5, resistor R6, capacitor C1, o...

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Abstract

The invention relates to a DSP based vector control system for a variable-speed constant-frequency double-feed wind driven generator, which comprises a detection circuit module and a control unit. The invention has the advantages that the control speed and the control accuracy are increased, and the system has good adjustment property and reliability; the control system is formed by using current, voltage and speed detection circuits and has simple hardware circuit, safe and reliable output trigger pulses and high real-time control accuracy, and the stability and the reliability of the device can be greatly improved; the system has high response speed and good adjustment property, and various indexes of the double-feed wind driven generator can be better controlled from a plurality of indexes; and the control system has broad market application prospect.

Description

(1) Technical field: [0001] The invention belongs to the technical field of wind power system stability control, in particular to a DSP-based doubly-fed wind power generator vector control system. (two) background technology: [0002] As the world environment is deteriorating day by day, wind power generation, as an important renewable energy source, has attracted more and more attention from people, and wind power grid-connected has developed rapidly. Compared with conventional generators, wind turbines have significant characteristics: (1) The randomness and uncertainty of wind speed determine the randomness and uncertainty of wind power; (3) The asynchronous wind turbine absorbs reactive power from the grid during operation. The ultimate goal of wind power generation is to connect to the grid and put it into operation. Among the many problems of wind power generation, the control of variable speed constant frequency double-fed wind power generator has also become one of ...

Claims

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Application Information

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IPC IPC(8): H02P21/14
Inventor 马幼捷李小双周雪松李季贾丽英
Owner TIANJIN UNIVERSITY OF TECHNOLOGY
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