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Electromagnetic torque jitter elimination method for doubly-fed induction wind driven generator

A wind power generator, electromagnetic torque technology, applied in wind power generation, control of generators, motor generator control, etc., can solve problems that have not been considered and raised

Inactive Publication Date: 2012-08-01
ZHEJIANG UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] However, it is a pity that the improved control scheme proposed in literature [1, 2] is only applicable to the case of a single grid fault, and does not fully consider the complex grid conditions of grid voltage imbalance and harmonic distortion and propose corresponding control schemes. Strategy

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  • Electromagnetic torque jitter elimination method for doubly-fed induction wind driven generator
  • Electromagnetic torque jitter elimination method for doubly-fed induction wind driven generator
  • Electromagnetic torque jitter elimination method for doubly-fed induction wind driven generator

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Embodiment Construction

[0040] The present invention will be further described below in conjunction with accompanying drawings and examples of implementation.

[0041] figure 1 Shown is the schematic diagram of the electromagnetic torque debounce method of the doubly-fed induction wind power generator proposed by the present invention, including the control object doubly-fed induction wind power generator (DFIG) 1, and the rotor-side converter 2 connected with the DFIG rotor winding , the voltage sensor used to detect the three-phase voltage of the DFIG stator and the current Hall sensor 3-1, 3-2, 3-3 used to detect the three-phase current of the DFIG stator and rotor, used to detect the position angle of the DFIG rotor and the speed of the unit The optical code disc 4 of the signal, and the control loop for realizing the DFIG output active and reactive power adjustment and electromagnetic torque debounce tasks. The control loop is composed of a feedback signal processing channel and a forward cont...

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Abstract

The invention discloses an electromagnetic torque jitter elimination method for a doubly-fed induction wind driven generator. According to the method, a rotor reference current instruction under a forward rotation synchronous speed coordinate system comprises an average active current instruction, an average reactive current instruction, a negative sequence, a fifth-order harmonic current component and a seventh-order harmonic component. A current controller can simultaneously realize the accurate and rapid adjustment of a direct current component, a frequency-doubled alternating current component and a frequency-sextupled alternating current component to effectively suppress frequency doubling and frequency sextupling jitter of the electromagnetic torque of the generator when a power grid has a voltage unbalance fault or a harmonic distortion fault and particularly when the two faults of the power grid coexist, so that the safe and reliable running of parts such as a gear box and a bearing of the generator is ensured, and the fault-ride-through capability of the doubly-fed induction wind driven generator is improved.

Description

technical field [0001] The invention relates to an electromagnetic torque debounce method of a doubly-fed induction wind-driven generator, which is suitable for the fault ride-through (uninterrupted) operation control of the doubly-fed induction wind-driven generator under the condition of unbalanced grid voltage and harmonic distortion. Background technique [0002] With the aggravation of global energy crisis, environmental pollution and climate change, the development and utilization of renewable energy mainly represented by wind energy has attracted widespread attention from all over the world. my country is very rich in wind energy resources. As of the end of 2011, my country's cumulative installed capacity has exceeded 62.7 million kWh, ranking first in the world. It is estimated that by 2020, my country's cumulative installed capacity is expected to reach 150 million to 200 million kWh. This is of great practical significance for alleviating the contradiction between ...

Claims

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Application Information

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IPC IPC(8): H02P21/14H02J3/38H02J3/01H02P21/22
CPCY02E10/763Y02E10/76Y02E40/40
Inventor 徐海亮章玮胡家兵贺益康
Owner ZHEJIANG UNIV
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