Alternating current-direct current two-level isolated direct current power device

Abstract

The invention relates to an alternating current-direct current two-level isolated direct current power device, which comprises a lightning arrester, wherein the input end of the lightning arrester is connected with a mains supply, and the output end of the lightning arrester is connected with the input end of a charging module; the output end of the charging module is connected with a second relay; the second relay is connected with the input ends of a first battery pack and a second battery pack; the output ends of the first and second battery packs are connected with a third relay respectively; the third relay is connected with the input end of a voltage stabilizing circuit; the output ends of the first and second battery packs are connected with the input end of a voltage comparator module; the output end of the voltage comparator module is connected with the input end of a microcontroller module; the output end of the microcontroller module is connected with a relay driving module; the output end of the relay driving module is connected with three relays respectively; the microcontroller module is connected with an Ethernet controller through a serial peripheral interface (SPI); and the Ethernet controller is connected with a far-end upper computer through the Ethernet. By the device, electrostatic induction of lightning stroke is effectively prevented from entering monitoring equipment through the mains supply, so that the probability of damaging the earthquake monitoring equipment by the lightning stroke is greatly reduced.

Description

technical field [0001] The invention relates to the technical field of power supply for monitoring instruments and equipment of an unattended seismic station, in particular to an AC-DC secondary isolated DC power supply device. Background technique [0002] With the development of earthquake prevention and disaster reduction and electronic technology, digital earthquake monitoring instruments and equipment have put forward higher and higher requirements for power supply. For seismic stations that transmit uninterrupted observation data, in order to obtain stable and reliable observation data, they are generally selected in remote environments that are less affected by external factors. In particular, seismic stations have strict regulations on bedrock and foundations, often with shallow soil coverage and grounding conditions that cannot fully meet lightning protection requirements, resulting in an increased probability of stations being damaged by lightning strikes. In orde...

AI Technical Summary

Problems solved by technology

Due to the complex environment and conditions around the station, it is often difficult to do a reasonable selection, configuration, installation and strict construction of SPD in actual work.

[0003] For remote unattended seismic stations, it is impossible to use manual switching to prevent equipment from being damaged by lightning

Most of these precision instruments are expensive equipment with low voltage and low power consumption. Whether it is the power supply of the instrument or the traditional uninterruptible power supply, the lightning protection effect depends entirely on the condition of the SPD. Lightning strikes often lead to data interruption losses and high repair costs

Images