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Method for rapidly switching power supplies of SIS (Safety Instrumented System)

A fast switching and system power supply technology, applied in the direction of emergency power supply arrangements, electrical components, circuit devices, etc., can solve the problems of unstable voltage output, prolonged switching time, poor power supply load capacity, etc., and achieve the effect of stable system operation

Inactive Publication Date: 2019-12-17
若尔玛余胜
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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 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 fast switching of SIS system power supply of the present invention includes the SIS system powered by UPS system, and also 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 to the DC 24V output bus;

[0...

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PUM

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Abstract

The invention discloses a method for rapidly switching power supplies of an SIS (Safety Instrumented System). The system is a newly added commercial power supply of the SIS power supply. Due to the connected commercial power supply, the SIS system needs to be switched to an UPS (Uninterruptible Power Supply) when the commercial power supply is in power failure, and a certain time is needed for switching from the commercial power supply to the UPS, and the time gap may affect the safety of the whole SIS system, so that a storage battery pack is added to the system. The main function of the storage battery pack is to ensure that the SIS load does not malfunction due to overlong power failure time when the switching time of the UPS system is prolonged. The storage battery pack is in a charging state under the condition that the commercial power supply and the UPS module are normal, and the storage battery pack can supply power to the SIS load without time slots when the commercial power supply is in power failure, so that the working state of the SIS load is stabilized; and when the UPS module completes automatic switching and supplies power to the load normally, the storage battery pack automatically exits from the output state and is switched to the charging state.

Description

technical field [0001] The invention relates to a power supply method, in particular to a method for fast switching of SIS system power supply. 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 voltage output, and poor ...

Claims

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Application Information

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IPC IPC(8): H02J9/06
CPCH02J9/06
Inventor 若尔玛余胜
Owner 若尔玛余胜