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Digital transformer differential protection device

A technology of differential protection device and transformer, applied in the field of digital transformer differential protection device, can solve the problem of incapable of all-round and high-precision reaction than that of argon working conditions, low reliability, long-term stability, and inability to inquire about accidents. Recording and other issues, to achieve the effect of simple and clear use, increased stability and reliability, and convenient handling of the structure

Inactive Publication Date: 2015-09-23
江苏汉天星配电自动化科技有限公司
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Problems solved by technology

[0002] The current digital transformer differential protection devices all use a combination of analog, digital and single-chip microcomputers. Their reliability, long-term stability is not high, and their integration is low. It is very inconvenient to set the operation, and it is impossible to query the accident records and other deficiencies

Method used

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  • Digital transformer differential protection device

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Embodiment Construction

[0011] see figure 1 , the present invention relates to a digital transformer differential protection device, the device includes a main control module 2, the main control module 2 is based on a PLC-based control circuit, the main control module 2 through the man-machine circuit 1 Receive the setting parameters of various signals, the communication port of the main control module 2 is connected with the RS485 circuit 3, and is used to realize communication with other equipment or devices, and the main control module 2 is respectively connected with the differential current quick-break protection circuit 4, the differential The dynamic protection circuit 5, the excitation inrush current judger 6, the overload blocking voltage regulation circuit 7 and the alarm circuit 8 are connected to process the vibration signal, displacement signal, stroke signal and speed signal. When the value exceeds the preset value, the The alarm circuit 8 outputs the signal, and can be externally conne...

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Abstract

The invention relates to a digital transformer differential protection device. The device comprises a main control module (2) and is characterized in that a communication port of the main control module (2) is connected with a man-machine circuit (1) and an RS485 circuit (3), and the main control module (2) is respectively connected with a differential current quick-break protection circuit (4), a differential protection circuit (5), an excitation inrush current judgment device (6), an overload locking and voltage regulating circuit (7) and an alarm circuit (8). The digital transformer differential protection device can reflect various data of a steam turbine, and storage and check analysis of the data visually and accurately, and has the advantages of high reliability, high stability and high precision.

Description

technical field [0001] The invention relates to a digital transformer differential protection device, which is mainly used as a control device for monitoring the working condition of the transformer. Background technique [0002] The current digital transformer differential protection devices all use a combination of analog, digital and single-chip microcomputers. Their reliability, long-term stability is not high, and their integration is low. The fixed operation is very inconvenient, and it is impossible to query the accident records and other deficiencies. Contents of the invention [0003] The purpose of the present invention is to overcome the above disadvantages and provide a digital transformer differential protection device that can intuitively and accurately reflect various data of the transformer, as well as store, view and analyze the data, and has high reliability, high stability and high precision. [0004] The purpose of the present invention is achieved in ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02H7/045
Inventor 高正洪
Owner 江苏汉天星配电自动化科技有限公司
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