A method and device for realizing high-voltage ride-through based on rotor string current-limiting resistors

A current-limiting resistor, high-voltage technology, applied in the electric power field, can solve problems such as voltage surges, and achieve the effect of solving voltage surges and reducing reactive power support

Active Publication Date: 2021-09-21
SICHUAN UNIV
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Problems solved by technology

[0004] In view of the above problems, the present invention provides a method and device for realizing high-voltage ride-through based on the rotor string current-limiting resistance, which solves the problem of voltage sudden generation in the recovery stage of low-voltage faults

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  • A method and device for realizing high-voltage ride-through based on rotor string current-limiting resistors
  • A method and device for realizing high-voltage ride-through based on rotor string current-limiting resistors
  • A method and device for realizing high-voltage ride-through based on rotor string current-limiting resistors

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[0096] In order to make the above objects, features and advantages of the present invention more comprehensible, the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, only a part of the embodiments of the present invention, not all the embodiments, and are not intended to limit the present invention.

[0097] The inventors found that in the field of fault research on doubly-fed wind turbines, the research results on doubly-fed wind turbines are mainly divided into two categories: one category improves the operating capability of the unit by optimizing the control strategy, and maximizes the control capability of the converter; The other is to ensure that the unit does not go off-grid by improving the topology of the hardware circuit.

[0098] However, the current research on faults...

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Abstract

The present application provides a method and device for realizing high-voltage ride-through based on a rotor string current-limiting resistor, which relate to the field of electric power. The method includes: when the sensor detects that the voltage on the grid side reaches a preset high voltage threshold, it sends a disconnection signal to the controller, and the controller controls the thyristor to disconnect, so that the rotor string current-limiting resistor is put into operation; the sensor detects that the voltage on the grid side When the rated voltage is reached, a closing signal is sent to the controller; the controller controls the thyristor to close, so that the rotor series current-limiting resistor is cut off and operated, and the high-voltage ride-through of the doubly-fed wind turbine is realized. In the scheme of the present invention, the rotor series current-limiting resistor is put into operation during the voltage sudden generation stage, and it is connected in series with the fan rotor, which not only limits the overcurrent of the fan rotor caused by the voltage sudden Power support and reduce the torque ripple, which solves the problem of voltage surge in the recovery stage of low voltage faults.

Description

technical field [0001] The invention relates to the field of electric power, in particular to a method and device for realizing high-voltage ride-through based on a rotor string current-limiting resistor. Background technique [0002] At present, in the field of DFIG fault research, the research results of DFIG are mainly divided into two categories: one is to improve the operation capability of the unit by optimizing the control strategy, and maximize the control capability of the converter; the other is By improving the topology of the hardware circuit, it is ensured that the unit does not go off-grid. [0003] However, the current research on faults only considers the single fault analysis of voltage sag or swell, and does not take into account the impact of voltage surge in the recovery stage of low-voltage faults. Contents of the invention [0004] In view of the above problems, the present invention provides a method and device for realizing high-voltage ride-throug...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02J3/38H02J3/16H02P9/00H02P9/10H02P101/15
CPCH02J3/16H02P9/007H02P9/102H02P9/105H02P2101/15Y02E40/30
Inventor 周步祥张越严雨豪陈鑫黄河张致强袁岳李祖钢
Owner SICHUAN UNIV
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