High-voltage electric energy metering device

A technology of measuring device and high-voltage electric energy, applied in the direction of measuring device, measuring electrical variable, measuring time integration, etc., can solve the problems of high single-stage withstand voltage, low single-stage withstand voltage, fault expansion, etc. Inrush current, the effect of reducing power consumption

Active Publication Date: 2012-01-04
YANTAI DONGFANG WISDOM ELECTRIC
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

High-voltage paper capacitors have the advantage of "self-healing" after breakdown, and are relatively safe, so they are widely used in power systems. However, high-voltage paper capacitors have low single-stage withstand voltage, require multi-stage series use, and are large in size The disadvantages of high-voltage electric energy metering devices have certain limitations for miniaturization; high-voltage ceramic capacitors have the advantages of high single-stage withstand voltage and small size, and have been used in some high-voltage electric energy metering devices.
However, high-voltage ceramic capacitors will form a short circuit after high-voltage breakdown, and there is a risk of further expansion of the fault when directly applied to high-voltage lines

Method used

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Examples

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Effect test

Embodiment 1

[0037] Such as figure 1 As shown, this embodiment is a single-phase high-voltage electric energy metering device for a voltage level of 10kV, including a current transformer 10, a high-voltage voltage divider 20, a high-voltage capacitor 30, a high-voltage fuse 40, a metering process and a power supply circuit 50, Optical fiber communication transceiver 60, first terminal 1, second terminal 2 and housing 80, wherein:

[0038] a. The first electrode 41 of the high-voltage fuse of the high-voltage fuse 40 is connected to the second terminal 2, and the second electrode of the high-voltage fuse

[0039] 42 are respectively connected to the first electrode 31 of the high voltage capacitor of the high voltage capacitor 30 and the first electrode 21 of the high voltage divider of the high voltage divider 20 .

[0040] b. Metering processing and power supply circuit 50 includes five electronic circuits including electric energy metering circuit 51, data processing circuit 52, sto...

Embodiment 2

[0060] Such as Figure 5 As shown, in this embodiment, there are two single-phase high-voltage electric energy metering devices as described in the first embodiment, and their second terminal 2 and the second metal flange 84 are connected back to back, and the second The terminals 2 are respectively connected to the B phase of the power system, the current input terminals 11 of the two single-phase high-voltage electric energy metering devices are respectively connected to the A phase and C phase input terminals of the power system, and the two first terminals 1 are respectively used as the A phase And the outgoing line of phase C is connected to the electrical equipment. The optical fiber transceivers of the two single-phase high-voltage electric energy metering devices are connected to each other through two optical fibers, and the data processing circuit 52 performs the summation of the electric energy collected by the two single-phase high-voltage electric energy meter...

Embodiment 3

[0064] Such as Image 6 As shown, in this embodiment, there are three single-phase high-voltage electric energy metering devices as described in the first embodiment, and the second terminals 2 of the three devices are connected to each other and the third terminal 3 is connected to the power system. N-phase. The current transformer 10 adopts a through-type current transformer. The A, B, and C three-phase cables of the power system first pass through the middle through holes of the three current transformers 10 respectively, and then connect with the respective first terminal 1, and then Connect to powered equipment.

[0065] In addition, a base is provided, and the second metal flanges 84 of the three single-phase high-voltage electric energy metering devices are respectively fixed on the base.

[0066] The optical fiber transceivers 60 of the three single-phase high-voltage electric energy metering devices are connected to each other in a ring topology through two ...

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PUM

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Abstract

The invention discloses a high-voltage electric energy metering device. A resistance-type high-voltage voltage divider is provided with two parallel plate electrodes; a sheet-type high-voltage arm resistor is obliquely arranged between the two electrodes; an included angle between the high-voltage arm resistor and the electrodes is less than 30 degrees; a high-voltage ceramic capacitor, a high-voltage fuse and a high-voltage damping resistor are connected in series in a capacitance buck power circuit; the high-voltage voltage divider is arranged on the side surface of the high-voltage fuse; the high-voltage capacitor is arranged on the end part of the high-voltage fuse; and the above components are packaged in a cylindrical shell by silicon rubber. The high-voltage electric energy metering device has the advantages of high precision, high temperature stability, low energy consumption and small volume, is safe to use, and is suitable for metering the electric energy of a 6-35kV single-phase, three-phase three-wire as well as three-phase four-wire system high-voltage power line.

Description

technical field [0001] The invention relates to a high-voltage electric energy measuring device, also known as a high-voltage electric energy meter, which is mainly used for high-voltage power lines above 6kV and below 35kV, especially for high-voltage power lines of 10kV. Background technique [0002] In order to adapt to the development direction of high voltage and large capacity of the power system, and to meet the requirements of energy saving and consumption reduction, the problem of accurate measurement of electric energy is particularly important. Only by using accurate electric energy measurement as a basis can the management of electrical equipment be strengthened to achieve energy saving purpose of reducing consumption. Electric energy metering is divided into high-voltage electric energy metering method and low-voltage electric energy metering method. Among them, the low-voltage metering method is to measure electric energy on the low-voltage side of the termina...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R11/40G01R11/04
Inventor 邓文栋
Owner YANTAI DONGFANG WISDOM ELECTRIC
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