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Full-power converter fault ride-through reactive power control method and system, medium and equipment

A fault ride-through, full power technology, applied in reactive power compensation, AC network circuit, AC network voltage adjustment and other directions, can solve problems such as insufficient reactive power

Active Publication Date: 2021-09-10
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

However, in the actual control of full power converters at present, the reactive power support coefficient given by the reactive current is fixed, and there may be insufficient reactive power in the process of dispatching reactive power in wind farms, which urgently needs to be resolved

Method used

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  • Full-power converter fault ride-through reactive power control method and system, medium and equipment
  • Full-power converter fault ride-through reactive power control method and system, medium and equipment
  • Full-power converter fault ride-through reactive power control method and system, medium and equipment

Examples

Experimental program
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Effect test

Embodiment 1

[0041] This embodiment discloses a method for controlling the fault ride-through reactive current of a wind turbine full power converter, see figure 1 As shown, this method is mainly aimed at large-scale semi-direct drive permanent magnet synchronous wind turbines connected to the grid with full power converters (the main components include gearboxes, medium-speed permanent magnet synchronous generators, impellers, towers, main control systems, and pitch control systems. systems, full-power converters, step-up transformers, etc.), the usage is that when the wind turbine is undergoing fault voltage ride-through, the control method of variable reactive power support coefficient is adopted, and the reactive power support coefficient is changed in real time according to different fault voltage dips or sudden rises. The value of the power support coefficient is given priority to quickly injecting reactive current into the grid to support the recovery of the grid voltage, thereby imp...

Embodiment 2

[0054]This embodiment discloses a fault ride-through reactive current control system for full power converters of wind turbines. The system adopts the control method of variable reactive power support coefficient, and changes the reactive power support in real time according to different fault voltage dips or sudden rises. The value of the coefficient should give priority to rapidly injecting reactive current into the grid to support the recovery of the grid voltage, thereby improving the grid-connected reliability of wind turbines. See Figure 5 As shown, the system includes a data acquisition module, a fault ride-through operation mode judgment module and a steady-state operation mode control module.

[0055] The data acquisition module collects the effective value of the three-phase voltage and the instantaneous value of the three-phase voltage of the grid-connected point through the controller of the full-power converter; The instantaneous value of the three-phase current...

Embodiment 3

[0065] This embodiment discloses a storage medium, which stores a program. When the program is executed by a processor, the method for controlling the fault ride-through reactive current of the wind turbine full power converter described in Embodiment 1 is implemented.

[0066] 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 full-power converter fault ride-through reactive power control method and system, a medium and equipment. For at a large-scale half-direct-drive permanent magnet synchronous wind turbine generator connected with a full-power converter, a control mode of a variable reactive power support coefficient in a fault operation state of the wind turbine generator can be adopted. According to different fault voltage drop or sudden rise degrees, the value of the reactive support coefficient is changed in real time, a reactive current is rapidly injected into the power grid to support the power grid voltage, flexible fault voltage ride-through of the wind turbine generator can be achieved, and the grid connection reliability of the wind turbine generator is improved.

Description

technical field [0001] The invention relates to the technical field of fault voltage ride-through of wind turbines, in particular to a fault ride-through reactive current control method, system, storage medium and computing device of a full-power converter of a wind turbine. Background technique [0002] Existing fault ride-through test procedures require that wind turbines should give priority to injecting reactive current into the grid to support grid voltage recovery under grid fault conditions. However, in the current actual control of full power converters, the reactive power support coefficient given by reactive current is fixed, and there may be insufficient reactive power in the process of dispatching reactive power in wind farms, which urgently needs to be resolved. Contents of the invention [0003] The first purpose of the present invention is to overcome the shortcomings and deficiencies of the prior art, and to provide a method for controlling reactive power t...

Claims

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Application Information

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IPC IPC(8): H02J3/16H02J3/38H02J3/00
CPCH02J3/16H02J3/381H02J3/001H02J2300/28Y02E40/30
Inventor 唐彬伟陈烁郭江涛朱敏黄丽玲
Owner GUANGDONG MINGYANG WIND POWER IND GRP CO LTD
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