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Method and systems for operating a wind turbine using dynamic braking in response to a grid event

A technology of dynamic brake and power grid, which is applied in the direction of responding to emergencies, the use of control systems, the control of wind turbines, etc., and can solve the problems of not allowing the recovery of the wind turbine system and damaging converter components, etc.

Active Publication Date: 2014-03-26
GENERAL ELECTRIC RENOVABLES ESPANA SL
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Typically, however, such systems do not allow the turbine system to recover quickly enough to meet some grid code standards and / or regulations
With existing control methods, when longer transmission line lengths are desired, voltage overshoots on the DC bus voltage in converters (possibly coupled with large grid voltage transients) can reach levels that damage components in the converter

Method used

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  • Method and systems for operating a wind turbine using dynamic braking in response to a grid event
  • Method and systems for operating a wind turbine using dynamic braking in response to a grid event
  • Method and systems for operating a wind turbine using dynamic braking in response to a grid event

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Embodiment Construction

[0048] Before the present methods and systems are disclosed and described, it is to be understood that the methods and systems are not limited to specific comprehensive methods, specific components, or specific compositions. It is also to be understood that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting.

[0049] As used in the specification and the appended claims, the singular forms "a", "an" and "the" include plural referents unless the context clearly dictates otherwise. Ranges can be expressed herein as from "about" one particular value, and / or to "about" another particular value. When such a range is expressed, another embodiment includes from the one particular value and / or to the other particular value. Similarly, when values ​​are expressed as approximations, by use of the antecedent "about," it will be understood that the particular value forms another embodiment. It will be further unders...

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Abstract

A method and system for dissipating energy in a direct current (dc) bus of a doubly-fed induction generator (DFIG) converter during a grid event is described. In one aspect, the method comprises monitoring operating conditions of an electrical system, the electrical system comprising at least a DFIG generator and a line side converter and a rotor side converter connected by a dc bus having a dynamic brake connected thereto; detecting an overvoltage on the dc bus or a condition indicative of an overvoltage on the dc link is detected, the overvoltage on the dc bus or condition indicative of the overvoltage caused by a grid event; and causing energy in the dc link to be dissipated using the dynamic brake.

Description

technical field [0001] The field of the disclosure relates generally to methods and systems for use in controlling the operation of a wind turbine, and more particularly, to controlling wind turbine operation using dynamic braking in response to an islanding event. Background technique [0002] Typically, fan systems utilize a closed-loop current regulation scheme that minimizes negative-sequence current to regulate positive-sequence voltage. Such systems function well and are known to be reliable at constant output power levels. However, as the length of the transmission feeder to the DFIG wind turbine system increases, the response to grid transients and grid disturbances induces power oscillations to and from the converter, which create disturbances on the DC bus voltage in the converter. Such power oscillations can lead to loss of system controllability and / or equipment failure over time. In some grid faults, at the time of clearance, the wind farm has no remaining con...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02H9/04H02J3/38
CPCH02J3/38Y02E10/725F05B2270/107Y02E10/723F05B2260/90F03D9/00F03D7/0244H02J2300/28H02J3/381Y02E10/72Y02E10/76
Inventor R.G.瓦戈纳A.M.里特E.V.拉森A.M.克罗多夫斯基S.A.巴克
Owner GENERAL ELECTRIC RENOVABLES ESPANA SL
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