Protection system

Abstract

The invention proposes a protection system, which comprises a control module, three output modules, a triple safety protection loop and a controlled object, wherein the control module outputs protection instructions; the three output modules are electrically with the control module and divide the protection instructions into three paths of independent protection instructions; the triple safety protection loop is electrically connected with the three output modules; and the controlled object is electrically connected with the triple safety protection loop. When two and more than two paths of protection instructions in the three paths of independent protection instructions are effective, an action is started to protect the controlled object, and otherwise the action is not started.

Description

technical field [0001] The present invention relates to a protection system, and in particular to a protection system with a triple safety protection action circuit. Background technique [0002] The function of the protection system is: when there is a problem endangering the operation of the process or equipment, the protection system will take corresponding actions in time to avoid accidents or minimize losses. It is a high-reliability control system. When the process or equipment is in danger, the corresponding protection action must be executed, that is, to prevent the protection from refusing to operate; to prevent the protection from malfunctioning when the process or equipment is not in danger. [0003] At present, the main body of the protection system generally adopts a programmable logic controller (Programmable logic controller) or a distributed control system (distributed control system). A protection system includes measuring elements for detecting related proc...

AI Technical Summary

Problems solved by technology

At present, in the protection system of important processes and equipment, the tripletization of measuring elements and input modules has been realized, and the redundant technology of the control module can also ensure its safety and reliability, but the output command of the control module to the controlled object has not yet achieved a single component Safe and Reliable Goals of Safeguarding Systems During Failures

The general protection adopts a single output action circuit, and the protection system of important processes and equipment adopts a double-circuit output action circuit. When any part of these output action circuits fails, the protection may malfunction or refuse to operate, which makes the reliability of the protection system not high.

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