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Offshore doubly-fed wind-driven generator set high-voltage ride-through (HVRT) control method and system

A doubly-fed wind turbine and control method technology, applied to wind power generation, electrical components, circuit devices, etc., can solve problems such as increased grid voltage surges

Active Publication Date: 2019-08-23
HUNAN UNIV +1
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Problems solved by technology

[0005] The main purpose of the present invention is to provide a high-voltage ride-through control method for offshore doubly-fed wind turbines based on supercapacitor energy storage technology, aiming to solve the problem of increased grid voltage surges in the process of offshore wind power generation

Method used

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  • Offshore doubly-fed wind-driven generator set high-voltage ride-through (HVRT) control method and system
  • Offshore doubly-fed wind-driven generator set high-voltage ride-through (HVRT) control method and system
  • Offshore doubly-fed wind-driven generator set high-voltage ride-through (HVRT) control method and system

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Embodiment Construction

[0056] It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0057] In the following description, use of suffixes such as 'module', 'part' or 'unit' for denoting elements is only for facilitating description of the present invention and has no specific meaning by itself. Therefore, 'module', 'part' or 'unit' may be used in combination.

[0058] see figure 1 and figure 2 , in order to achieve the above object, the first embodiment of the present invention provides a high-voltage ride-through control method for offshore doubly-fed wind turbines based on super capacitor energy storage technology. The doubly-fed wind turbines include sequentially connected wind turbines 1, gears Box 2, Doubly fed asynchronous induction generator (Doubly fed Induction Generator, DFIG) 3, rotor side converter 4, DC link capacitor 12 and grid side converter 6, the DC link capacitor 12 is connected ...

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Abstract

The invention discloses an offshore doubly-fed wind-driven generator set high-voltage ride-through (HVRT) control method and system based on supercapacitor energy storage technology. The offshore doubly-fed wind-driven generator set HVRT control method includes the steps of: obtaining a grid-connected point voltage per-unit value and the duration of a grid-connected point voltage rise; determiningwhether to activate a HVRT control mode to reduce the grid-connected point voltage; after the HVRT control mode is activated, determining whether the output active current value of a grid-side converter exceeds the active current maximum value borne by the normally operating grid-side converter; if so, determining whether a DC link voltage exceeds a critical value of the DC link voltage; and if so, starting a supercapacitor energy storage module. The method aims to avoid an off-grid accident of the offshore doubly-fed wind-driven generator set possibly caused by the sudden rise of the grid voltage in the prior art.

Description

technical field [0001] The present invention relates to the technical field of offshore wind power generation, in particular to an offshore double-fed wind turbine high-voltage ride-through control method based on supercapacitor energy storage technology, and an offshore double-fed wind turbine high-voltage ride-through control system applying the control method. Background technique [0002] According to the latest "Global Wind Power Development Report 2018" data released by the Global Wind Energy Council (GWEC), the global offshore wind power installed capacity continued to rise from 2011 to 2018, and in 2018, my country's new installed capacity was 1,800MW, surpassing the United States as the world's largest offshore wind power growth. The fastest country, this trend shows that offshore wind power has become the main force of my country's future new energy development. However, as a high proportion of offshore wind turbines are connected to local power grids on a large sca...

Claims

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Application Information

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IPC IPC(8): H02J3/38H02J3/32H02J3/24
CPCH02J3/24H02J3/32H02J3/386Y02E10/76Y02E70/30
Inventor 魏娟黎灿兵曹一家周斌张聪肖彭瑶王舶仲张子杰张辽王晓辉张哲萌
Owner HUNAN UNIV
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