Detection system and method for validity of analog quantity output channel of power plant

Abstract

The invention discloses a detection system and a detection method for the validity of an analog quantity output channel of a power plant. The system comprises a controller upper computer (1), a controller (2), an analog quantity output module (3), an analog quantity input module (4) and a power source (5), wherein the controller (2), the analog quantity output module (3) and the analog quantity input module (4) are respectively connected with the power source (5) by power lines; the controller upper computer (1) is connected with the controller (2) by a cable; the analog quantity output module(3) and the analog quantity input module (4) are respectively connected with the controller (2) by an RS-485 or RS-232 serial port; and the analog quantity output module (3) and the analog quantity input module (4) are connected by hard wiring. The system and the method realize notification of the real-time state of each analog quantity output channel to the controller and a DCS, so that troubleshooting time is shortened. In addition, the invention also gives consideration to channel redundancy, and online switching is realized in malfunction of channels.

Description

technical field [0001] The invention relates to a validity detection system and method for an analog quantity output channel of a power plant, and belongs to the technical field of power plant operation control and optimization. Background technique [0002] As the core of most power plant control systems, the distributed control system (Distributed Control System, DCS) is essentially a multi-level computer system composed of a process control level and a process monitoring level with a communication network as a link. , display and control and other 4C technologies. In the control and optimization system technical transformation project of the power plant, the newly added controller is generally connected to the DCS by hard wiring; that is, the analog output (Analog Output, AO) module of the newly added controller is connected to the analog input of the DCS (Analog Input, AI) module is connected. [0003] Among them, hard wiring is the traditional wiring method with termi...

AI Technical Summary

Problems solved by technology

However, for control and optimization system technical transformation projects that require higher reliability, the reliability of ordinary hard-wiring methods is still insufficient; especially for occasions that require high channel effectiveness, this method cannot inform the real-time status of the channel Controller and DCS; when a fault occurs, such as a channel is disconnected, manual troubleshooting and troubleshooting are required, which takes a long time

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