Electric vehicle charging arc light short circuit fault online monitoring system

Abstract

The invention discloses an electric vehicle charging arc light short circuit fault online monitoring system. The system is suitable for a resident personal charging pile, and comprises a plurality ofdata acquisition units and a data server, and each data acquisition unit is installed on a charging loop of one resident personal charging pile, and is used for acquiring voltage and current data on acharging loop of an installed resident personal charging pile in real time; and the data server is connected with each data acquisition unit through a signal line, and is used for receiving voltage and current data on a charging loop of each resident personal charging pile in real time, and when the reduction speed of the voltage value is greater than a preset voltage reduction speed value or theincrease speed of the current value is greater than a preset current increase speed value, and judging that the charging loop of the resident personal charging pile has a low-voltage arc light short-circuit fault. The system can safely and reliably monitor whether a low-voltage arc light short-circuit fault exists in a load electrical loop (namely a charging loop) of a resident personal chargingpile or not, and the loop is cut off in time when the short circuit occurs.

Description

technical field [0001] The invention relates to the technical field of new energy comprehensive services, in particular to an on-line monitoring system for electric vehicle charging arc short-circuit faults, which is suitable for resident personal charging piles. Background technique [0002] With the growth of the market share of electric vehicles, the number of car owners applying for the installation of personal charging piles for residents is increasing day by day. However, since most of the charging piles are installed outdoors and cannot be managed centrally, there are many uncertain factors in the charging process, and they are easily affected by the external environment and weather. At the same time, the charging circuit of the electric vehicle shares the bridge frame with the electrical circuit of the residential residents' living electricity. Once a short-circuit fault occurs in the charging circuit, it will directly affect the residents' living electricity circuit,...

AI Technical Summary

Problems solved by technology

[0002] With the growth of the market share of electric vehicles, the number of car owners who apply for the installation of personal charging piles for residents is increasing day by day. However, since most charging piles are installed outdoors, they cannot be managed centrally. At the same time, the charging circuit of the electric vehicle shares the bridge with the electrical circuit used by the residents in the community. Once a short circuit fault occurs in the charging circuit, it will directly affect the electrical circuit used by the residents, thereby expanding the accident.

[0003] However, the existing online monitoring system for electrical faults can only be used to monitor the short-circuit and ground faults of overhead lines and cables of 10 kV and above in power transmission and distribution lines, while the load electrical circuit of residents' personal charging piles (that is, charging circuit) are all low-voltage 0.4 kV, it is impossible to monitor whether there is a low-voltage arc short-circuit fault in the load electrical circuit (that is, the charging circuit) of the resident’s personal charging pile, and cut off the circuit in time when there is a low-voltage arc short-circuit fault

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