Detection circuit and electric energy metering chip based on circuit and equipment

A technology of electric energy metering chip and detection circuit, which is applied in the direction of measuring electric variables, measuring devices, measuring time integration, etc., can solve the problems of electric energy billing errors, troubles and losses of both power supply and consumption, and achieve suppression of common mode interference and reduction of The effect of measurement error

Pending Publication Date: 2020-05-29
HI TREND TECH SHANGHAI
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  • Abstract
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  • Claims
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Problems solved by technology

[0004] At present, the management personnel of electric energy meters use the method of regular off-line spot check of electric energy meter errors during the whole life cycle management process after the electric energy meters are connected to the grid. Diagnose the fault of electric energy metering circuit, cause the error of electric energy billing, bring unnecessary trouble and loss to both parties of electricity supply and consumption

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  • Detection circuit and electric energy metering chip based on circuit and equipment
  • Detection circuit and electric energy metering chip based on circuit and equipment
  • Detection circuit and electric energy metering chip based on circuit and equipment

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Embodiment Construction

[0045] In the following description, many technical details are proposed in order to enable readers to better understand the application. However, those skilled in the art can understand that the technical solutions claimed in this application can be realized even without these technical details and various changes and modifications based on the following implementation modes.

[0046] Explanation of some concepts:

[0047] Creeping: When the electric energy meter is running or calibrating, it often happens that the dial still rotates continuously when only the voltage is applied but the load current is zero. This phenomenon is called voltage creeping, or creeping for short.

[0048] The steepest descent method: also known as the gradient method, it is the oldest one in the analytical method, and other analytical methods are either its deformation or inspired by it, so it is the basis of the optimization method. The steepest descent method is just an important analytical method...

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Abstract

The invention relates to the technical field of electric energy metering, and discloses a detection circuit and an electric energy metering chip and device based on the detection circuit and equipment. The circuit comprises a reference current source, a sampling circuit, an adaptive filtering module, a signal processing module, a disconnection working condition detection circuit and protection measures adopted for the working condition. The adaptive filtering module is adopted, the metering error caused by the change of the frequency of the reference current source or the interference in the sampling signal is greatly reduced and the detection precision of the detection circuit is improved; meanwhile, the detection circuit is designed for various wire disconnection working conditions in the detection circuit, disconnect protection measures are correspondingly designed, and the reliability and the safety of operation of the metering system are improved.

Description

technical field [0001] The present application relates to the technical field of electric energy metering, in particular to a detection circuit and an electric energy metering chip and equipment based on the circuit. Background technique [0002] In the energy measurement of the smart energy meter, the grid current and voltage signals are generally converted into voltage signals that meet the safe range of the input voltage of the ADC (Analog to Digital Converter, analog-to-digital conversion chip) through the energy meter, sensors and sampling network. The converted digital signal is then input to the digital processing unit for power calculation and measurement. [0003] In the power supply system, the accuracy of the electric energy metering device is directly related to the economic interests of both the power supply and the consumer, although the electric energy metering equipment will be calibrated by a standard meter with a higher precision level before leaving the fa...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R11/00G01R22/06
CPCG01R11/00G01R22/06
Inventor 张志勇张震李全栋袁逍宇张明雄
Owner HI TREND TECH SHANGHAI
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