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Fast switching method of power supply for instrument control system

A fast switching, instrument control system technology, applied in emergency power supply arrangements, electrical components, circuit devices, etc., can solve the problems of unstable voltage output, poor power load capacity, SIS system malfunction, etc., to achieve the effect of stable system operation

Inactive Publication Date: 2019-01-15
华蓥市观音溪初级中学
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is that the switching time of the UPS is long, which exceeds the operation time requirement of the SIS system, causing the SIS system to malfunction. Unstable voltage output, poor power load capacity, etc.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] The method for quickly switching the power supply of the instrument control system of the present invention includes an SIS system powered by a UPS system, and further includes the following steps:

[0021] A. Lead a 220V AC power supply from the original UPS backup circuit to the high-frequency switching power supply box of the SIS system as its main power supply; connect the UPS backup power supply to the high-frequency switching power supply box and connect the circuit breaker, and then install the circuit SPD;

[0022] B. From the backup circuit of the power outlet cabinet of the box-type substation or low-voltage power distribution room, lead a commercial power supply to the high-frequency switching power supply box of the SIS system as its new power supply;

[0023] C. Add a group of DC 24V battery packs, and connect the battery packs to the load of the SIS system; in the step C, the battery packs are connected to the load of the SIS system through and connected t...

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PUM

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Abstract

The invention discloses a method for fast switching power supply of an instrument control system, This system is the newly added mains power supply of SIS power supply, and because of the mains powersupply, when the mains power supply is powered down, you need to switch to the UPS power supply, while switching from the mains to the UPS takes time, This time gap may affect the safety of the wholeSIS system. Therefore, a battery pack is added to the system. The main function of the battery pack is to ensure that the SIS load does not malfunction when the switching time of the UPS system is prolonged, in order to ensure that the SIS load does not power down for too long. The battery pack is in charging state when the mains power supply and the UPS module power supply are normal. When the mains power supply is off, the battery pack can supply power to the SIS load without time gap and stabilize the SIS load working state. When the automatic switching of the UPS module is completed and the load is normally supplied, the battery pack automatically exits the output state and transitions to the charging state.

Description

technical field [0001] The invention relates to a power supply method, in particular to a method for quickly switching the power supply of an instrument control system. Background technique [0002] SIS system (Safety Instrumented System Safety Instrumented System) belongs to the category of enterprise production process automation. It is a system used to ensure safe production. The safety level is higher than that of the DCS automation control system. When the automatic production system is abnormal, the SIS will intervene. Reduce the possibility of accidents. The SIS system is based on the distributed control system and adopts advanced, applicable and effective professional calculation methods to improve the reliability of the unit operation. [0003] Due to the importance of the SIS system in the station, in order to ensure its safe and stable operation, it is necessary to solve the aforementioned problems of UPS output interruption, prolonged switching time or unstable ...

Claims

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Application Information

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IPC IPC(8): H02J9/06
CPCH02J9/061H02J9/068
Inventor 付黔蜀祝启辉
Owner 华蓥市观音溪初级中学