Electric energy metering method

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...

AI Technical Summary

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 resulted in inaccurate electric energy measurement, which is unfair to power generation companies and power transmission and distribution companies

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