Remote maintenance device for uninterruptible power supply

Abstract

The invention proposes a remote maintenance device for an uninterruptible power supply, including three loops of voltage acquisition, switch signal acquisition and remote control, and three ports are drawn from the voltage acquisition loop; the remote control loop is powered by an AC power supply, and the positive and negative poles of the remote control loop The first and second relays are connected in parallel, the above relays are connected in series with the normally open contacts of the third and fourth relays respectively, the normally open contacts of the third relay are connected in parallel with the third normally open contacts of the first relay, and one end of the third and fourth relays is connected The negative pole of the DC power supply leads to the fourth and fifth ports from the other end, and the positive pole of the DC power supply leads to the tenth and eleventh ports respectively; the normally closed contact of the second relay is connected in series with the first relay, and the second normally open contact of the first relay The contacts lead to the eighth and ninth ports; the switch signal acquisition circuit includes the first normally closed contact of the first relay, and the contacts lead to the sixth and seventh ports. The device involved in the invention can monitor the voltage value and working state of the accumulator, and can remotely control it for charging and discharging.

Description

technical field [0001] The invention relates to the technical field of electric power automation, in particular to a remote maintenance device for an UPS that can monitor the voltage value of a storage battery in an UPS and the working status of the storage battery in real time, and can remotely control the storage battery for charging and discharging. Background technique [0002] The remote control terminal (RTU) of the substation is the terminal equipment of the power grid dispatching automation system, and the RTU is responsible for the information transmission between the substation and the dispatching automation system. The RTU is powered by an uninterruptible power supply, that is, it is powered by AC and DC dual power supplies. During normal operation, the AC is the main power supply, and the DC is the backup power supply. When the AC power fails, the DC power becomes the main power supply. [0003] The working status of the UPS needs to be obtained by the on-duty p...

AI Technical Summary

Problems solved by technology

However, with the development of the power grid, the number of substations has increased, resulting in a longer manual inspection cycle

Once the UPS battery fails, it is difficult to find it in time only by manual inspection, which will affect the safe operation of the RTU in the substation

Moreover, during the use of UPS, the battery needs to be charged and discharged at least once a year for maintenance work, and manual charge and discharge maintenance work consumes manpower and material resources

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