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Converter, high voltage ride through control method and device for converter

A control method and converter technology, applied in the direction of circuit devices, AC network voltage adjustment, AC network circuits, etc., can solve the problems such as the high voltage ride-through control strategy that has not proposed the reactive current setting method of the converter, so as to avoid Effect of hardware transformation and cost saving

Active Publication Date: 2020-07-24
XINJIANG GOLDWIND SCI & TECH CO LTD
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  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, the inventors of the present application found that the reactive current setting method of the HVRT mode of the converter and its corresponding HVRT control strategy have not been proposed in the prior art so that the wind power generating set has the HVRT function

Method used

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  • Converter, high voltage ride through control method and device for converter
  • Converter, high voltage ride through control method and device for converter
  • Converter, high voltage ride through control method and device for converter

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Embodiment Construction

[0055] Features and exemplary embodiments of various aspects of embodiments of the present invention will be described in detail below. In the following detailed description, numerous specific details are set forth in order to provide a thorough understanding of embodiments of the invention.

[0056] The embodiment of the present invention provides a converter of a wind power generating set, a method and a device for controlling high voltage ride through of the converter, and proposes a reactive current setting method and its corresponding method for the high voltage ride through mode of the converter The high-voltage ride-through control strategy enables the wind turbine to have a high-voltage ride-through function.

[0057] figure 1 It is a schematic flowchart of a high voltage ride through control method for a converter provided by an embodiment of the present invention. Such as figure 1 As shown, the high voltage ride through control method of the converter includes: st...

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Abstract

The invention provides a converter, and a method and device for controlling high voltage ride through (HVRT) of a converter. The method for controlling HVRT of a converter comprises: monitoring the grid voltage at a grid side of the converter; determining the current working status of the converter according to the grid voltage and a rated voltage of the converter; if the current working status of the converter is determined to be in HVRT mode, calculating, based on the voltage characteristics of the DC bus of the converter, the voltage characteristics of a power grid, and an inductive reactance value of the converter reactor, the reactive current set value required to supply reactive current to the reactor; supplying the reactive current to the reactor according to the reactive current set value. The present invention provides a method to supply a reactive current for an HVRT mode of a converter and a corresponding strategy for controlling the HVRT, such that the wind turbine generator system has an HVRT function.

Description

technical field [0001] The present invention relates to the technical field of wind power generation, in particular to a converter of a wind power generating set, and a high voltage ride-through control method and device for the converter. Background technique [0002] At present, permanent magnet direct drive wind turbines are connected to the grid through converters. The machine side of the converter converts the non-fixed-frequency AC power of the wind turbine into DC power, and the grid side converts the DC power into fixed-frequency AC power and feeds it into the grid. However, when a high voltage appears in the grid, the grid-side output power of the converter is suppressed, causing the DC bus voltage of the converter to rise, triggering protection, causing the wind turbines to stop in batches, and causing an impact on the grid. Therefore, wind turbines are required to have a high voltage ride through function. [0003] In the prior art, by outputting reactive curren...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02J3/38H02J3/50H02J3/16
CPCH02J3/16H02J3/386H02J3/50H02J2203/20H02J3/38Y02E10/76Y02E40/30
Inventor 武磊杨志千
Owner XINJIANG GOLDWIND SCI & TECH CO LTD
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