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A filter detection method and device

A detection method and filter technology, applied in the field of electronics, can solve problems such as the detection of the running state of the filter, and achieve the effect of simple circuit and reliable normal operation.

Active Publication Date: 2018-01-12
维谛新能源有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The embodiment of the present invention provides a detection method and equipment to solve the problem of filter operation state detection in the prior art

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  • A filter detection method and device

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Embodiment Construction

[0051] At present, due to the improvement of power quality standards, higher requirements are placed on the operating status of the power conversion system that directly affects the power quality, which requires the filter in the power conversion system to be in a normal working state.

[0052] In order to detect the filter in the power conversion system in real time, an embodiment of the present invention provides a filter detection method, the method includes: when the power conversion system used to convert the circuit of the power generation system and output it to the power grid When disconnected from the power grid, detect the output current value of the filter in the power conversion system under the preset voltage value, and obtain the difference between the output current value and the standard output current value, when the output current value and When the difference between the standard output current values ​​is less than the preset threshold value, a control infor...

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Abstract

The embodiment of the present invention provides a filter detection method and equipment. After applying a preset voltage to the filter, the output current value of the filter is detected, and then the detected output current value is compared with the standard output current value. According to the comparison result of the difference between the output current value and the standard output current value and the preset threshold value, it is determined whether the filter is in a normal working state. Timely and accurate detection of filter working status.

Description

technical field [0001] The invention relates to the field of electronic technology, in particular to a filter detection method and equipment. Background technique [0002] In the current power system, the power provided by the power generation system needs to be converted into electric energy through the power conversion system. The current power conversion system is realized by semiconductor switches, but the current power conversion system will generate a large number of high-frequency harmonics during power conversion. If these high-frequency harmonics are output to the grid without any processing, it will have a great impact on the grid. [0003] In order to remove a large number of high-frequency harmonics generated during power conversion by the power conversion system, an LC filter or LCL filter must be added to the power conversion system. These filters have a strong effect on the high-frequency harmonics generated in the power conversion system. Therefore, the oper...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01R31/00
Inventor 刘震李卿段博
Owner 维谛新能源有限公司