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Electric energy metering method and system

A technology of electric energy measurement and electric energy, which is used in the measurement of electric variables, electric power measurement through current/voltage, electric vehicles, etc., which can solve the problems of insufficient measurement and measurement accuracy.

Active Publication Date: 2020-05-08
北京五力泰科技有限公司
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Problems solved by technology

In the case of single PT access, measurement and metering accuracy is insufficient

Method used

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  • Electric energy metering method and system
  • Electric energy metering method and system
  • Electric energy metering method and system

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Embodiment Construction

[0053] The implementation mode of the present invention is illustrated by specific specific examples below, and those who are familiar with this technology can easily understand other advantages and effects of the present invention from the contents disclosed in this description. Obviously, the described embodiments are a part of the present invention. , but not all examples. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0054] A potential transformer (PT) is similar to a transformer and is an instrument used to transform the voltage on the line. However, the purpose of transforming the voltage of the transformer is to transmit electric energy, so the capacity is very large, and it is generally calculated in kilovolt-ampere or megavolt-ampere. The purpose of the voltage transformer to transform the voltage is ma...

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Abstract

The embodiment of the invention discloses an electric energy metering method and system. The method comprises the steps: measuring UAB and UCB voltages in a three-phase three-wire system, and judgingwhether a wiring state belongs to a UAB access terminal or a UCB access terminal or a double-PT access terminal according to the UAB and UCB voltages and a set threshold value; under the condition that the wiring state belongs to the UAB access terminal or the UCB access terminal, acquiring a first phase voltage UAB or a second phase voltage UCB, a first phase current Ia and a second phase currentIc, and an included angle between the first phase voltage UAB or the second phase voltage UCB and the first phase current Ia and an included angle between the first phase voltage UAB or the second phase voltage UCB and the second phase current Ic, so as to calculate electric energy; and under the condition that the wiring state belongs to the double-PT access terminal, acquiring a first phase voltage UAB, a second phase voltage UCB, the first phase current Ia, the second phase current Ic and a power factor angle to calculate the electric energy. Under the condition of single-PT and double-PTaccess, the precision of electric quantity metering during double-PT access can be kept.

Description

technical field [0001] The embodiments of the present application relate to the technical field of electric energy metering, and in particular to an electric energy metering method and system. Background technique [0002] Electric energy metering is a very important technology in the power system. It is widely used in the measurement of line loss in the process of transmission and distribution and the settlement of electricity bills in the field of electricity consumption. In recent years, with the vigorous development of distribution network automation and the distribution network proposed by the State Grid Corporation With the requirements of primary and secondary integration, the call for lean management of distribution network is increasing day by day. As an important data, the line loss in the transmission and distribution network requires special equipment to complete the measurement. In the primary and secondary integration scheme of the State Grid Corporation of Chi...

Claims

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Application Information

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IPC IPC(8): G01R22/06G01R21/00G01R21/06
CPCG01R22/06G01R21/002G01R21/003G01R21/06
Inventor 张翼飞张超罗少军
Owner 北京五力泰科技有限公司
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