A variable frequency power supply test system and its test control method

A variable frequency power supply and test system technology, which is applied in power supply testing and other directions, can solve problems such as low test efficiency and complex system architecture, and achieve the effects of complete test functions, high equipment utilization, and improved test efficiency

Active Publication Date: 2019-10-29
NR ELECTRIC CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Existing test methods and test systems still have the defects of complex system architecture and low test efficiency when achieving the above test purposes

Method used

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  • A variable frequency power supply test system and its test control method

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Embodiment 1

[0044] Such as figure 1 As shown, the variable frequency power supply test system of the present invention includes a transformer, a first variable frequency power supply and a second variable frequency power supply, wherein the first variable frequency power supply is used as the measured object, and the second variable frequency power supply is used as a simulated load;

[0045] The first variable frequency power supply and the second variable frequency power supply include a grid-side converter and a load-side converter respectively; the AC sides of the grid-side converters of the first variable frequency power supply and the second variable frequency power supply are respectively connected to the grid through a transformer, and the DC side is connected to the power grid. The DC side of the load-side converter; the AC side of the load-side converter of the first variable frequency power supply is connected to the AC side of the load-side converter of the second variable freq...

Embodiment 2

[0049] In this embodiment, the three-winding transformer in Embodiment 1 is replaced by two double-winding transformers, and the AC sides of the grid-side converters of the first variable-frequency power supply and the second variable-frequency power supply are respectively connected to the grid through a double-winding transformer.

[0050] In Embodiment 1 and Embodiment 2, the roles of the two variable frequency power supply devices in the variable frequency power supply test system of the present invention can be interchanged, so as to realize separate tests on the two variable frequency power supply devices. The present invention can utilize two existing variable-frequency power supplies, only need to add a three-winding transformer or two double-winding transformers, and combine the control method and the adjustment of the control strategy to realize the test function.

Embodiment 3

[0052] In embodiment 1 and embodiment 2, with the first variable frequency power supply S1 as the measured object, the second variable frequency power supply S2 as the simulated load, the test control method of the variable frequency power supply test system includes steps:

[0053] S1, start the grid side converter of the first variable frequency power supply S1 as the object under test, and control the DC side voltage of the grid side converter to be stable;

[0054] S2, start the load-side converter of the first variable frequency power supply S1, and control the AC side voltage and frequency of the load-side converter to be stable;

[0055] S3, start the grid side converter of the second variable frequency power supply S2 as the simulated load, and control the DC side voltage of the grid side converter to be stable;

[0056] S4, start the load-side converter of the second variable-frequency power supply S2, and control the AC-side voltage of the load-side converter of the ...

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PUM

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Abstract

The invention discloses a frequency conversion power supply test system and a test control method thereof. The test system comprises a transformer, a first frequency conversion power supply and a second frequency conversion power supply, the second frequency conversion power supply serving as a simulation load. The first frequency conversion power supply and the second frequency conversion power supply each include a power grid side converter and a load side converter. AC sides of the power grid side converters of both the first frequency conversion power supply and the second frequency conversion power supply are connected with a power grid through the transformer. An AC side of the load side converter of the first frequency conversion power supply is connected with an AC side of the loadside converter of the second frequency conversion power supply. The frequency conversion power supplies are utilized to simulate load in the frequency conversion power supplies, the two frequency conversion power supplies are tested respectively through adjustments of the control method, test procedures of multiple to-be-measured frequency conversion power supplies can be simplified, the test efficiency can be improved, and the cost is low.

Description

technical field [0001] The invention relates to the field of power electronics application test technology, in particular to a variable frequency power supply test system applicable to shore power variable frequency power supplies and a test control method thereof. Background technique [0002] Frequency conversion power supply is widely used in shore power, high-power power electronic analog power supply and other fields. Since its output operating frequency is different from the 50HZ frequency of the domestic power grid, it cannot be directly connected to the power grid when it is tested and verified. [0003] The test of the variable frequency power supply needs to meet several test objectives at the same time, including the output accuracy and stability of the variable frequency power supply, the load capacity of the variable frequency power supply, and the dynamic response characteristics of the variable frequency power supply. [0004] The existing test methods and tes...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01R31/42
Inventor 谢晔源王宇李海英刘洪德祁琦连建阳曹冬明
Owner NR ELECTRIC CO LTD
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