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Wind generating set and low voltage ride-through protection method thereof

A technology of wind power generators and doubly-fed motors, applied in wind power generation, electrical components, circuit devices, etc., can solve problems such as the failure of the unit to transmit electric energy, the shutdown of the wind power generator, and the failure of the tracking ability of the frequency conversion system of the power grid fluctuation rate unit, to achieve The effect of making precise control strategies, reducing mechanical loss, and enhancing information interaction capabilities

Active Publication Date: 2014-02-26
大连尚佳新能源科技有限公司
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AI Technical Summary

Problems solved by technology

[0006] 1. Due to the excessive fluctuation of the power grid, the unit cannot normally transmit electric energy to the power grid
[0007] 2. Due to the fast fluctuation rate of the power grid, the tracking ability of the frequency conversion system of the unit fails
[0008] 3. The wind turbine will shut down due to failure

Method used

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  • Wind generating set and low voltage ride-through protection method thereof
  • Wind generating set and low voltage ride-through protection method thereof
  • Wind generating set and low voltage ride-through protection method thereof

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Embodiment Construction

[0031] specific implementation plan

[0032] The present invention is further described in conjunction with accompanying drawing and specific embodiment:

[0033] A wind power generating set, including a doubly-fed motor, a box-type transformer and a transformer; the doubly-fed motor is connected to the low-voltage side of the box-type transformer through two parallel channels of the stator and the rotor, and the stator channel is connected in series with the stator circuit breaker, and the The rotor channel is connected in series with the converter and the rotor circuit breaker. A circuit breaker is installed on the connecting cable between the low-voltage side of the box-type transformer and the two parallel channels. The high-voltage side of the box-type transformer is connected to the power grid. The transformer The high-voltage side of the transformer is connected to the low-voltage side of the box-type transformer and the connecting cable of the two parallel channels, an...

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Abstract

The invention discloses a wind generating set and a low voltage ride-through protection method of the wind generating set. The wind generating set comprises a set signal tracking system and a power grid signal tracking system, wherein the set signal tracking system is connected to an energy outlet of the wind generating set, the power grid signal tracking system is installed on the high-voltage side of a box-type transformer, and the set signal tracking system and the power grid signal tracking system are connected with a PLC control system. The set signal tracking system is used for collecting power quality information of the outlet of the wind generating set, analyzing the operating state of the wind generating set and feeding back the power quality information and operating state information of the wind generating set to the PLC control system. The power grid signal tracking system is used for collecting power grid signals of the high-voltage side of the box-type transformer, analyzing the operating state of a power grid and feeding back the power grid signals and operating state information of the power grid to the PLC control system. The wind generating set can meet the requirement for power generation in an area where power grid fluctuation is large and also can reduce the fault rate of a wind generator to a large extent.

Description

technical field [0001] The invention relates to a wind power generating set and a low-voltage ride-through protection method, in particular to a wind power generating set with a signal tracking system and a method for realizing low-voltage ride-through protection thereof. Background technique [0002] With the gradual depletion of fossil energy, people urgently need to develop clean renewable energy, and wind energy has become one of the renewable energy sources favored by people. The driving force of wind power generation is wind, which is an inexhaustible, inexhaustible, non-mining, non-transporting, clean, environmentally friendly, non-polluting, and recyclable new energy source. Nowadays, with the continuous improvement of high-power wind turbine technology, the electric energy delivered by wind turbines to the grid has already occupied a decisive proportion in the grid. Whether wind turbines can operate stably in the grid has an important impact on the security of the ...

Claims

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Application Information

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IPC IPC(8): H02J3/40H02J13/00
CPCY04S10/123Y02E10/763Y02E40/72Y02E10/76Y02E40/70
Inventor 严岚马靖聪马静张晓明
Owner 大连尚佳新能源科技有限公司
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