A method for monitoring and controlling power quality at electric vehicle charging piles based on the Internet of Things

Abstract

The invention discloses a method for monitoring and controlling the power quality of electric vehicle charging piles based on the Internet of Things. The monitoring module collects the working conditions and power quality information of the charging piles through electric energy measurement sensors, and transmits the power quality data to the data analysis and processing master. station, to judge and analyze the data, if the power quality is lower than the minimum threshold, the data analysis and processing master station will send an early warning signal to the online monitoring terminal, and at the same time send an instruction to the power management device in the area to achieve unified power quality in the area Governance, data analysis and processing The master station maintains interactive contact with the terminal of the online monitoring system through the communication module; the power management device includes a voltage compensator and a power voltage stabilizer. The invention reduces manual operations and avoids untimely manual operations; improves power quality management efficiency and distribution network automation; more effectively protects batteries of electric vehicles and other loads, and prolongs their service life.

Description

technical field [0001] The invention belongs to the field of power quality detection, in particular to a method for monitoring and controlling power quality at a charging pile of an electric vehicle based on the Internet of Things. Background technique [0002] The existing electric vehicle technology is still in the stage of small-scale trial operation. Facing the large-scale development of electric vehicles and the regularity of people's work and rest, the charging load will have an obvious peak in the evening. The growth of charging load is directly related to the type and scale of electric vehicles. With the large-scale access of electric vehicles to the DC distribution network, it may lead to voltage flashover, voltage deviation, and voltage sag and sudden rise in the DC distribution network. It may even cause the system to crash. As a result, equipment failures such as line damage, capacitor burnout, DC circuit breaker or relay malfunction, and load burnout. In addit...

AI Technical Summary

Problems solved by technology

The growth of charging load is directly related to the type and scale of electric vehicles. With the large-scale access of electric vehicles to the DC distribution network, it may cause voltage flashover, voltage deviation, and voltage sag and sudden rise in the DC distribution network. even crash the system

As a result, equipment failures such as line damage, capacitor burnout, DC circuit breaker or relay malfunction, and load burnout

In addition, the power quality pollution caused by the large-scale connection of electric vehicles to the DC distribution network will also affect the normal operation of the DC distribution network, surrounding electric vehicle batteries and other loads, and will affect the power quality of the electric vehicle batteries, resulting in The service life of the battery is severely reduced

However, the current power quality management system still has a single target, low governance efficiency, and a low degree of automation in governance. In most cases, manual adjustment and governance are required.

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