Electric energy data storage method

Abstract

The invention belongs to the technical field of electric energy measuring and relates to an electric energy data storage method. The electric energy data storage method includes: firstly adjusting an I2C (inter-integrated circuit) bus, writing functions in E2 PROM (electrically erasable programmable read-only memory before starting writing operation of the I2C bus of the E2 PROM, partitioning the integral integer electric quantity into N electric energy storage blocks, and switching once each M kWh; judging whether to accumulate to the M kWh or not after the electric energy is accumulated to 1 kWh, if not, accumulating the electric energy to one, and if yes, adding one on an electric energy pointer; if the electric energy pointer is smaller than N, accumulating the electric energy to one, and recording the pointed electric energy storage block after the electric energy pointer is added with one; or copying pointed electric energy of the current electric energy pointer to the first electric energy storage block, and the electric energy pointer is cleared when the electric energy is accumulated to one in the first electric energy storage block. The electric energy data storage method is simple in technique, reliable in principle, cost-saving, high in universality and high in storage data reliability, and electric energy meters are long in service lives.

Description

Technical field: [0001] The invention belongs to the technical field of electric energy measurement, and relates to a process for storing electric energy data based on a low-cost data storage chip E2PROM, in particular to an electric energy data storage method, which has a long data storage time and is accurate and reliable. Background technique: [0002] Electric energy data storage is the most important part of electric energy metering, which is related to the vital economic interests of users and power companies. At present, smart grids are being promoted both domestically and internationally. Electric energy metering instruments have expanded from simple metering functions to many information interaction and management control functions. , that is, the current smart meters and energy efficiency management terminals, no matter how the intelligence of power meters develops, the reliability of power metering and data storage is the fundamental and most important function. T...

AI Technical Summary

Problems solved by technology

There are generally two types of existing electric energy data storage chips on electric energy meters: E2PROM electrically erasable memory and FRAM ferroelectric, and the data control bus is a serial I2C bus. It only costs about 1 yuan, but the delay between the two write operations of E2PROM must ensure enough time, otherwise the data storage will be unreliable, and the number of erasable times can only be guaranteed to be 1 million times, while the cost of FRAM is relatively high, the same The price of the storage space is several times that of E2PROM, but the number of erasing and writing is not limited, and there is no need to consider the delay of erasing and writing, and the reliability is high. In the current field of electric energy measurement, E2PROM is generally used for single-phase meter storage. Three-phase meters use FRAM to store power data, but these power data storage methods often have abnormal power data, causing great losses to meter manufacturers and wasting resources

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