Electric energy metering method

An energy metering and energy metering chip technology, applied in the measurement of electrical variables, measuring devices, instruments, etc., can solve the problems of inaccurate, unfair, and inability to measure energy, reduce power consumption, and facilitate layout and wiring. Effect

Inactive Publication Date: 2015-09-16
HI TREND TECH SHANGHAI
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

[0006] Obviously, the practice of stopping metering will make it impossible to measure the electric energy during the stop metering period
This has

Method used

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  • Electric energy metering method

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Embodiment Construction

[0028] Aiming at the problem that the SOC electric energy metering chip cannot measure electric energy in the case of current phase failure and electric stealing, the present invention proposes a low-frequency metering method, so that the power consumption of the entire electric energy metering chip can be reduced while still measuring electric energy.

[0029] Below, the low-frequency metering solution of the present invention will be described in detail with reference to the accompanying drawings.

[0030] figure 1 It is a schematic diagram of the basic structure of the SOC electric energy metering chip. Such as figure 1 As shown, the sampling circuit (not shown) inputs the current and voltage signals sampled from the circuit to the analog-to-digital converter (ADC) through the pins V1P, V1N, V2P, V2N, V3P, and V3N respectively, wherein the pin V1P, V1N, V2P, V2N, V3P, and V3N represent two positive and negative input pins of the current channel I1, two positive and nega...

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Abstract

The invention discloses an electric energy metering method which comprises the following steps: detecting whether an electric energy metering chip for electric energy metering loses power; during power failure, switching system power supply of the electric energy metering chip to a backup electricity-taking mode; switching an electric energy metering clock of the electric energy metering chip to a low-frequency clock; and metering the electric energy in a preset time period. According to the low-frequency metering scheme provided in the invention, even if under the mode of circuit phase failure or electricity stealing, calculation of the effective value of the current can still be carried out, and meanwhile, power consumption is reduced; and the method provides apparent power and apparent power pulse output without depending on the support of specific process or devices, facilitates locating and wiring very well, and can guarantee that necessary information on the electric energy metering chip is not lost.

Description

technical field [0001] The present invention generally relates to an electric energy metering chip, and in particular relates to a low power consumption electric energy metering method for an electric energy metering chip. Background technique [0002] The task of electric energy metering is to accurately accumulate the instantaneous power of users into energy, and provide a basis for settlement between power generation companies, power transmission and distribution companies, and power users. Its accuracy directly affects the interests of the three and the rationality of transactions. The electric meter is a commonly used electric energy meter, and the most critical component in the electric meter is the system on chip (System on Chip, SOC) electric energy metering chip. [0003] Figure 10 The basic structure of a commonly used SOC electric energy metering chip is shown. Such as Figure 10 As shown, the SOC electric energy metering chip generally includes: an analog-to-di...

Claims

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Application Information

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IPC IPC(8): G01R22/10
Inventor 胡晋萧经华朱昊张志勇张斌阳
Owner HI TREND TECH SHANGHAI
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