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Wind turbine generator fault voltage ride-through reactive power control method and system, medium and equipment

A fault voltage and wind turbine technology, applied in wind power generation, reactive power compensation, AC network voltage adjustment, etc., can solve problems affecting the operation of the unit, improve grid-connected adaptability, smooth switching, and realize flexible fault voltage ride-through Effect

Active Publication Date: 2021-08-13
GUANGDONG MINGYANG WIND POWER IND GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, wind turbines are used as distributed reactive power compensation. In the process of dispatching reactive power in wind farms, if the generator sets enter the fault voltage ride-through state, according to the existing control strategy, it may cause insufficient reactive power to affect the operation of the generator set.

Method used

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  • Wind turbine generator fault voltage ride-through reactive power control method and system, medium and equipment
  • Wind turbine generator fault voltage ride-through reactive power control method and system, medium and equipment
  • Wind turbine generator fault voltage ride-through reactive power control method and system, medium and equipment

Examples

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Embodiment 1

[0071] This embodiment discloses a wind turbine flexible fault voltage ride-through reactive power control method based on positive sequence voltage, see figure 1 As shown, this method is mainly aimed at large-scale semi-direct drive permanent magnet synchronous wind turbines with full power converters connected to the grid (main components include gearboxes, permanent magnet generators, impellers, towers, main control systems, pitch systems, full Power converters, step-up transformers, etc.), can extract the positive sequence voltage component of the grid under grid voltage fault conditions, especially under asymmetric fault conditions, and inject reactive current into the grid to support the grid voltage based on the positive sequence voltage component Restoration to realize flexible fault voltage ride-through of wind turbines. See figure 2 As shown, the method includes the following steps:

[0072] 1) Data collection

[0073] The controller of the full power converter c...

Embodiment 2

[0098] This embodiment discloses a flexible fault voltage ride-through reactive power control system for wind turbines based on positive sequence voltage. This system is mainly aimed at large-scale semi-direct drive permanent magnet synchronous wind Working conditions, especially under asymmetrical fault conditions, extract the positive sequence voltage component of the grid, and inject reactive current into the grid to support the grid voltage recovery according to the positive sequence voltage component, and realize the flexible fault voltage ride-through of wind turbines; see Figure 4 As shown, the system includes a data acquisition module, a fault voltage detection module and a fault voltage ride-through control module.

[0099] The data acquisition module collects the effective value of the three-phase voltage and the instantaneous value of the three-phase voltage at the grid-connected point through the controller of the full-power converter, and extracts the positive seq...

Embodiment 3

[0123] This embodiment discloses a storage medium, which stores a program. When the program is executed by a processor, the wind turbine flexible fault voltage ride-through reactive power control method described in Embodiment 1 is implemented.

[0124] The storage medium in this embodiment may be a magnetic disk, an optical disk, a computer memory, a read-only memory (ROM, Read-Only Memory), a random access memory (RAM, Random Access Memory), a U disk, a mobile hard disk, and the like.

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Abstract

The invention discloses a wind turbine generator fault voltage ride-through reactive power control method and system, medium and equipment. The method mainly aims at a large semi-direct-drive permanent magnet synchronous wind turbine generator connected into a grid through a full-power converter. Under a voltage fault of a power grid, the positive sequence voltage component of the power grid is extracted, a reactive current is preferentially injected into the power grid according to the positive sequence voltage component to support the voltage recovery of the power grid, and flexible fault voltage ride-through of the wind turbine generator is achieved. Under the condition that the wind turbine generator generates reactive power, more reactive current can be preferentially injected into the power grid during fault ride-through to support rapid recovery of the voltage of the power grid by improving the reactive current value during the fault, so that flexible fault voltage ride-through of the wind turbine generator is realized, smooth switching between a steady-state operation state and a fault operation state of the unit can be realized, and the grid-connected adaptability of the unit is improved.

Description

technical field [0001] The invention relates to the technical field of flexible fault voltage ride-through of wind turbines, in particular to a reactive power control method, system, storage medium and computing equipment for flexible fault voltage ride-through of wind turbines. Background technique [0002] According to the requirements of the existing fault voltage ride-through regulations, wind turbines should give priority to injecting reactive current into the grid to support the recovery of the grid voltage when the grid is symmetrically faulty. The actual grid faults are mostly asymmetrical faults, and the wind turbines only emit a small amount of reactive power to support the grid voltage recovery during the fault voltage ride-through process. At present, wind turbines are used as distributed reactive power compensation. In the process of dispatching reactive power in wind farms, if the generators enter the fault voltage ride-through state, according to the existing ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J3/16H02J3/38H02J3/00
CPCH02J3/16H02J3/381H02J3/001H02J2300/28Y02E10/76Y02E40/30
Inventor 陈烁唐彬伟郭江涛黄丽玲曾瑞斌
Owner GUANGDONG MINGYANG WIND POWER IND GRP CO LTD
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