Equipment and method for managing user load abnormity at special transformer metering point

Abstract

The invention provides equipment and a method for managing user load abnormity at a special transformer metering point. The equipment comprises a special transformer fault alarm instrument which is disposed in a secondary metering loop of a high-voltage metering box, employs a meter-hanging installation mode, is connected with an intelligent electric meter in a voltage parallel connection and current series connection mode, and collects the voltage and current values of a representative line in real time through the high-voltage metering box; abnormal short message alarm is provided for low-voltage, load current abnormity and over-capacity default electricity consumption, a power supply manager is reminded to pay attention to the abnormal electricity consumption condition of a user, the power supply manager is helped to quickly position a line fault source in combination with a power distribution line power failure event, faults caused by long-term over-capacity electricity consumption of the user are prevented, the reliability of a power supply line is improved, and the patrol time is shortened. The equipment is low in cost, fast in installation, free of one-time power failure, and suitable for improving fault management level in a short time of fast reconstruction of old distribution lines.

Description

technical field [0001] The invention relates to the field of power distribution in the electric power industry, in particular to a device for managing user load abnormalities at special variable metering points. Background technique [0002] At present, power supply departments, especially in non-developed provinces, only install high-voltage metering boxes and smart energy meters for metering at the demarcation points of special transformer users’ property rights. According to the statistics of a power supply department, about 47% of line trips and power outages are caused by special transformer users Caused by side load faults, each line power outage requires line inspections by line operation and maintenance personnel to determine the source of the fault, which usually takes more than 2 hours, affecting the power consumption of other normal users. [0003] The smart energy meter collects voltage and current data in an integral manner, and cannot correctly collect the inst...

AI Technical Summary

Problems solved by technology

[0002] At present, power supply departments, especially in non-developed provinces, only install high-voltage metering boxes and smart energy meters for metering at the demarcation points of special transformer users’ property rights. According to the statistics of a power supply department, about 47% of line trips and power outages are caused by special transformer users Caused by side load faults, each line power outage requires line inspection by line operation and maintenance personnel to determine the source of the fault, which usually takes more than 2 hours, affecting the power consumption of other normal users

[0003] The smart energy meter collects voltage and current data in an integral manner, and cannot correctly collect the instantaneous value of the fault current

[0004] If the transformation of distribution feeder terminals is adopted, firstly, it is necessary to disconnect the primary line and install a vacuum circuit breaker, the number of users of the entire line is large, and the equipment cost is huge; secondly, power outage work is usually required (the cost of live work is high), which affects users Normal electricity consumption is not conducive to social and economic production activities, making construction organization difficult; three, there are many user points, long renovation cycle, and slow results

[0005] If the line fault indicator is used to transform, firstly, line inspection is still required, and it can only indicate quick-break short-circuit and extreme high current faults, but cannot indicate overcurrent faults, and the function is not flexible enough; secondly, it is still necessary to install mutual inductance on the primary line device

[0006] If the intelligent line fault indicator is used for transformation, first, a transformer needs to be installed on the primary line; second, a communication host needs to be installed on the primary line pole, and the power supply of the communication host is usually solar energy, which has requirements for climate and installation environment , maintenance work is required in the later stage; three, the main station server needs to be set up, and there are requirements for management work

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