Device for testing power grid adaptability of wind generator set

A technology for wind turbines and adaptive testing, which is applied in the direction of motor generator testing, wind power generation, and measurement devices, and can solve the problem that the test parameters of wind turbines are greatly affected, it is difficult to test the complete data of wind turbines, and the initial state of grid voltage Unable to adjust and other problems, to achieve the effect of shortening the experimental cycle, low cost, and small volume

Active Publication Date: 2010-10-27
SHENZHEN HOPEWIND ELECTRIC CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] 1. The device is bulky, high in cost, and has high requirements on the capacity of the power grid, which is inconvenient to adjust and has a long experiment period;
[0007] 2. Due to the need to simulate the deep drop of the power grid, the series current-limiting reactance X1 in the reactance network is required to be relatively large, which has a great i

Method used

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  • Device for testing power grid adaptability of wind generator set
  • Device for testing power grid adaptability of wind generator set
  • Device for testing power grid adaptability of wind generator set

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] Such as image 3 As shown, the grid adaptability test device of the wind power generating set of the present invention is realized by using a converter 20 constructed based on power semiconductor switching devices. According to needs, other structures can be added on the basis of the converter 20 in the grid adaptability testing device of the wind power generating set.

[0035] Such as Figure 4 As shown, the converter 20 includes a controller 500, a rectifier 200, a DC link 300, and an inverter 400. The rectifier 200, the DC link 300, and the inverter 400 are connected in sequence, and the controller 500 communicates with the rectifier 200 and the inverter 400. connection, the rectifier is connected to the three-phase power supply 1, and the inverter 400 is connected to the wind power generating set 3 to provide the test voltage to the wind power generating set to be tested.

[0036] The user sends a control instruction to the rectifier 200 and the inverter 400 throu...

Embodiment 2

[0046] Such as Figure 6 As shown, the implementation circuit of the converter 20 of the wind power generating set grid adaptability testing device of the present invention is as follows: the converter adopts a three-phase four-wire input and output mode (star connection), wherein the input terminals In1, In2 , In3 and InN (neutral line input terminal) are connected to the three-phase power supply and the neutral line, and the output terminals Out1, Out2, Out3 and OutN (neutral line output terminal) are connected to the three-phase and neutral line of the wind turbine to be tested. The converter 20 includes a rectifier 800 , a DC link 900 , an inverter 1000 and a controller 1100 .

[0047] The rectifier 800 includes input capacitors C11~C13, input reactances L11~L13 and a bridge circuit composed of power semiconductor switching devices Q13~Q18. The input reactances L11~L13 are connected in series to each phase of the input end of the bridge circuit. Groups C11-C13 are respect...

Embodiment 3

[0056] Such as Figure 7 As shown, the converter 20 includes an AC-AC converter 2000 and a controller 2100 , and the controller 2100 is connected to the AC-AC converter 2000 in a signal manner.

[0057] Such as Figure 8 As shown, the implementation circuit of the converter 20 of the wind power generating set grid adaptability testing device of the present invention is as follows:

[0058] The converter of this embodiment adopts a three-phase three-wire input and output mode, wherein the input terminals In1-In3 are connected to the three-phase power supply, and the output terminals Out1-Out3 are connected to the wind power generator set to be tested.

[0059] The converter 20 includes an AC-AC converter 2000 and a controller 2100, and the AC-AC converter 2000 is connected to a three-phase power supply and a wind power generating set. The AC-AC converter 2000 directly converts the three-phase AC voltage from the three-phase power supply into the three-phase AC voltage require...

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Abstract

The invention relates to a device for testing power grid adaptability of a wind generator set, which comprises a converter built based on a power semiconductor switch device, wherein the input end of the converter is connected with a three-phase power supply and the output end thereof is connected with the wind generator set. Due to the adoption of the converter built based on the power semiconductor switch device, the device for testing the power grid adaptability of the wind generator set has the advantages of high power density, small volume, low cost and capabilities of bearing a majority of dynamic impacts caused by the wind generator set in the fault experiment process of the power grid to reduce the requirement of an experiment system on the capacity of the power grid, realizing the stepless regulation of voltage and frequency to conveniently and flexibly simulate various power grid faults, extend the test range, enrich test data and reduce the experiment period; and simulating various initial states of the power grid voltage prior to the power grid fault test to completely test the fault data of the wind generator set in various states of the power grid.

Description

technical field [0001] The present invention relates to a test device, more specifically, to a test device for testing the grid adaptability of a wind power generating set. Background technique [0002] With the rapid development of the wind power industry and the increasing proportion of wind power installed capacity in the national power structure, more and more countries have put forward strict requirements on the grid connection conditions and grid adaptability of grid-connected wind turbines. These include the adaptation of wind turbines to grid voltage and frequency deviations and fluctuations, and low voltage ride through performance (Low Voltage Ride Through, LVRT for short). The low-voltage ride-through performance refers to the ability of the wind turbine to maintain uninterrupted grid-connected operation after the connected grid fails and the voltage of the wind farm drops, so as to avoid the removal of the wind farm from seriously affecting the operation stabilit...

Claims

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Application Information

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IPC IPC(8): G01R31/34
CPCY02E10/763H02M5/4585H02M5/293G01R31/343H02J3/386H02J2300/28H02J3/381
Inventor 盛小军王志华周党生吕一航
Owner SHENZHEN HOPEWIND ELECTRIC CO LTD
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