Voltage loop alarm for metering devices of transformer station

Abstract

The invention discloses a voltage loop alarm for metering devices of a transformer station. The alarm comprises an RS485 communication circuit, an alarm circuit, an SMS (Short Message Service) communication circuit, a power supply circuit and an LCD (Liquid Crystal Display). During use, RS485 communication interfaces of the measured metering devices, i.e., the measured electric energy meters, are connected in parallel and then connected with the RS485 communication circuit of the alarm, the alarm is communicated with the measured electric energy meters via an RS485 bus to obtain real-time voltage information of the metering devices, the LCD displays the voltage information of the different measured metering devices in a cyclical manner, the SMS communication module in the alarm can send abnormal voltage information in the short message form, and a CPU of the alarm is connected with a battery voltage monitoring chip to monitor power utilization states of a storage battery. The voltage loop alarm for the metering devices of the transformer station has the advantages that voltage abnormity of the metering devices can be timely judged, operation staff is timely notified of the voltage abnormity, the voltage abnormity can be timely handled, electric energy which is omitted in recording is decreased, and disputes in metering is also decreased.

Description

technical field [0001] The invention relates to a voltage loop alarm for a substation metering device. Background technique [0002] There are many intermediate links in the voltage circuit for substation metering, so the abnormal voltage of the electric energy meter often occurs (loss of voltage accounts for more than 90%). When the electric energy meter loses voltage, it will stop working and lose the function of electric energy measurement. Due to the lack of alarm device, it is difficult for the operation and maintenance personnel to find out at the first time, which will cause the electric energy meter to run for too long when the voltage is lost, resulting in a large amount of electric energy leakage and serious economic losses. , At the same time, it has buried hidden dangers for measurement disputes and damaged the company's reputation and image. [0003] Such as figure 2 As shown, the voltage of the electric energy meter passes through multiple links such as the b...

AI Technical Summary

Problems solved by technology

When the electric energy meter loses voltage, it will stop working and lose the function of electric energy measurement. Due to the lack of alarm device, it is difficult for the operation and maintenance personnel to find out at the first time, which will cause the electric energy meter to run for too long when the voltage is lost, resulting in a large number of electric energy leaks and serious economic losses. , At the same time, it has laid a hidden danger for measurement disputes, which will damage the company's reputation and image

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