An online monitoring method for a backup power system of an intelligent power distribution terminal

Abstract

The invention discloses an online monitoring method for the backup power supply system of an intelligent power distribution terminal, which belongs to the field of power system automation. The online monitoring method is characterized by comprising the following steps of: step a, setting an online monitoring mode word; step b, acquiring a standard discharge curve for forming an energy storage component and storing; step c, acquiring a real-time discharge curve for forming the energy storage component; step d, calling the standard discharge curve and calculating the association coefficient of the curve; step e, judging the association coefficient of the curve. According to the online monitoring method for the backup power supply system of the intelligent power distribution terminal, the original hardware resources of the intelligent terminal are utilized, online monitoring is realized only by measuring the voltage value of an energy storage medium, and cooperating with the activation circuit of the intelligent terminal, without the need of measuring a current and calculating an internal resistance, and adding additional monitoring equipment; the online monitoring method is convenient to measure, accurate and reliable, and low in measurement cost.

Description

technical field [0001] The invention relates to an online monitoring method for a backup power supply system of an intelligent power distribution terminal, which belongs to the field of power system automation. Background technique [0002] Smart power distribution terminals (hereinafter referred to as smart terminals) are the key equipment of the smart grid. A medium-sized city with complete power distribution automation needs thousands of smart terminals. These smart terminals are installed in every corner of the city, and the installation of many smart terminals The environment is harsh and unattended, and the maintenance and repair workload in the later period is very heavy. [0003] The backup power system in the smart terminal is an important guarantee to ensure the continuous operation of the smart terminal in the event of a power failure. In the backup power system, the energy storage component is a component with a short life. In practical applications, the energy s...

AI Technical Summary

Problems solved by technology

When batteries and supercapacitors are used as energy storage elements, when the AC power supply is normal, the energy storage elements are subjected to constant voltage float charging, but the energy storage elements whose performance is greatly degraded have no external characteristics when performing constant voltage float charging. Abnormal, so difficult to identify

[0004] At present, the internal resistance detection method is commonly used for online monitoring of energy storage media. The detection of internal resistance requires accurate measurement of current and voltage, and an additional hardware detection circuit is required. Moreover, different types of energy storage media have different ranges of internal resistance. Energy medium type, so it is more complicated and difficult to realize

Images