High voltage electric energy direct metered system and method

A technology for high-voltage electric energy and metering systems, applied in non-electrical signal transmission systems, measurement of electrical variables, signal transmission systems, etc., can solve the problems that the measurement error of the device cannot be directly defined, and it is difficult to prevent bad electricity theft behaviors, so as to save cost and investment and footprint, good economics, volume and weight reduction

Inactive Publication Date: 2008-07-09
WUHAN GUOCE HENGTONG INTELLIGENT INSTR
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Problems solved by technology

At the same time, due to the low voltage signal of 100V / 5A or 100V / 1A between the transformer part on the high voltage side and the electric energy meter on the low voltage side, it is difficult to prevent bad electricity stealing behavior at this interface part, and the biggest problem is that the overall measurement error of the device cannot direct definition

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  • High voltage electric energy direct metered system and method
  • High voltage electric energy direct metered system and method
  • High voltage electric energy direct metered system and method

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[0031] The above and other technical features and advantages of the present invention will be described in more detail below in conjunction with the accompanying drawings.

[0032] For the energy measurement method on the high-voltage three-phase power line, since the primary power supply system is a neutral point insulation system, the two-component method is used for energy measurement. The two-component method can measure the power and energy of a three-phase three-wire circuit under asymmetrical load conditions without error. The formula for the three-phase total power is:

[0033] p=u A i A + u B i B + u C i C =(u A -u B )i A +(u C -u B )i C = u AB i A + u CB i C

[0034]If Uab, Ucb, Ia, and Ic are all connected to a grounding circuit, the insulation problem between the high-voltage primary side and the secondary low-voltage signal needs to be solved, and it returns to the traditional electric energy metering scheme of the electric energy metering device....

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Abstract

The invention relates to a high-voltage electric energy direct measurement system and a method, which is applied on a three-phase high-voltage circuit. The system comprises an A-phase high-voltage electric energy measurement unit arranged on the high-voltage terminal of an A-phase power line for measuring a first portion of electric energy consumption; a C-phase electric energy measurement unit arranged on the high-voltage terminal of a C-phase power line for measuring a second portion of electric energy consumption; a B-phase electric energy synthesis unit arranged on the high-voltage terminal of a B-phase power line for accumulating the first portion of and the second portion of electric energy consumption.

Description

technical field [0001] The invention relates to an electric energy metering technology, in particular to a high-voltage electric energy direct metering system and method arranged on a three-phase high-voltage line. Background technique [0002] The traditional high-voltage power metering devices (also known as "high-voltage power metering cabinets" or "high-voltage power metering boxes") currently used in distribution networks are composed of high-voltage voltage transformers between phases AB and CB and high-voltage power transformers between phases A and C. A current transformer plus a three-phase three-wire watt-hour meter is also used in the form of a combination of voltage and current transformers (such as a combination of a 10kV voltage transformer and a 10kV current transformer, or two 10kV voltage transformers and two 10kV current transformer overall combination). A three-phase three-wire watt-hour meter with input rating of 100V / 5A or 100V / 1A on the low-voltage sid...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R21/00G08C23/06G08C17/00
Inventor 侯铁信胡顺卜正良
Owner WUHAN GUOCE HENGTONG INTELLIGENT INSTR
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