Unbalanced current measuring device

A measuring device and current balancing technology, which is applied in the direction of measuring devices, only measuring current, measuring electrical variables, etc., can solve problems such as difficulty in ensuring mass production performance, reliability and stability of polarization-maintaining optical fibers, and high requirements for device selection , to achieve the effect of safe and reliable insulation method, simple insulation method and strong replaceability

Inactive Publication Date: 2018-11-13
江苏鑫航电力设备工程有限公司
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Problems solved by technology

The latter technology is difficult to solve the problems of complex insulation structure, magnetic saturation, ferromagnetic resonance, flammable and explosive oil, and small dynamic range in UHV applications.
However, the structure of the all-fiber optical current transformer system is complex, and its reliability and stability are difficult to guarantee. Polarized optical fiber preparation is difficult to guarantee mass production performance, the overall cost is high, and it is difficult to promote on a large scale

Method used

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  • Unbalanced current measuring device
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Embodiment

[0029] see figure 1 , figure 2 , the invention discloses an unbalanced current measuring device, comprising a primary optical sensing unit 1, an optical fiber insulator 2, a communication optical cable 3 and a secondary data collector 4, the neck of the primary optical sensing unit 1 passes through the flange Ⅱ10 is fixed to the capacitor tower to support the weight of the primary optical sensing unit and the optical fiber insulator to ensure the structural strength of the product under the conditions of icing, typhoon and earthquake. One end of the optical fiber insulator 2 passes through flange I9, flange II10 and The bottom of the primary optical sensing unit 1 is fixed, and the other end of the optical fiber insulator 2 is connected to the secondary data collector 4 through the communication optical cable 3 .

[0030] Further, the bottom of the primary optical sensing unit is provided with a P1 current terminal 5 and a P2 current terminal 6 .

[0031] Specifically, the ...

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Abstract

The invention discloses an unbalanced current measuring device. The unbalanced current measuring device comprises a primary optical sensing unit, a fiber optic insulator, a communication optical cableand a secondary data acquisition unit, wherein the neck of the primary optical sensing unit is fixed with a capacitor tower through a flange II; one end of the fiber optic insulator is fixed with thebottom of the primary optical sensing unit through a flange I and the flange II, and the other end of the fiber optic insulator is connected with the secondary data acquisition unit through the communication optical cable. The provided unbalanced current measuring device is simple and reliable in structure, convenient to construct and mount, better in stability, moderate in cost and suitable forlarge-scale popularization, and has great significance in development of ultra-high-voltage direct-current projects.

Description

technical field [0001] The invention relates to the technical field of electric equipment, in particular to a current measuring device. Background technique [0002] Filter unbalanced current transformer is an indispensable power equipment in UHV DC engineering. Its main function is to measure the unbalanced current on the bridge arm of the filter tower or reactive power compensation capacitor tower, and to monitor and protect the operation status of the capacitor unit. [0003] At present, most of the existing unbalanced current measurement devices use all-fiber optical current transformers, and some use traditional electromagnetic current transformers. The latter technology is difficult to solve the problems of complex insulation structure, magnetic saturation, ferromagnetic resonance, flammable and explosive oil, and small dynamic range in UHV applications. However, the structure of the all-fiber optical current transformer system is complex, and its reliability and sta...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R19/00
CPCG01R19/0092
Inventor 刘英
Owner 江苏鑫航电力设备工程有限公司
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