Rod position processing device of nuclear power station control rod based on PLC (Programmable Logic Controller) platform

Abstract

The invention belongs to a rod position processing device of electrical equipment and relates to the field of rod position processing of a control rod of a million kilowatt grade nuclear power station. The device comprises two controllers, an industrial personal computer (IPC), a redundant system communication module, a network interface of an I / O (input and output) module and an I / O module, wherein the two controllers are logic control modules based on programmable controllers, one is a main controller, and the other is a subordinate controller, and the two controllers form a controller hot backup redundant system; the main controller keeps consistent with the subordinate controller; when the main controller has failure, the control right is automatically switched to the subordinate controller; the IPC is loaded with a control program and a monitoring program for realizing real-time monitoring on the controllers; the redundant system communication module is used for realizing communication between the controllers; the network interface of the I / O module is controlled by the controllers in real time to realize data exchange with an external system by applying a TCP / IP (Transmission Control Protocol / Internet Protocol) through a gateway; and the I / O module is used for realizing the input and output of an analogue and digital signal. The invention can ensure that the current nuclear power plant realizes realize digitization based on analog, simplifies a system interface and improves the reliability and the transmission accuracy of the system.

Description

technical field [0001] The invention relates to the field of control rod position processing of a million-kilowatt nuclear power plant, in particular to a control rod position processing method and device jointly realized by a PLC and an industrial computer. Background technique [0002] Reactor power control is accomplished by varying the concentration of boron dissolved in the reactor coolant and by the combined action of control rods containing neutron absorbers. The rod position system is a control rod position measurement and rod position processing device, which is used to monitor the actual position of the control rod, and conduct comprehensive processing with the input information such as the given rod position and rod group movement, monitor whether each rod group is faulty, and carry out Fault alarms and fault indications are transmitted to external systems so that operators can find problems in the shortest possible time and perform necessary operations in a timel...

AI Technical Summary

Problems solved by technology

The design process is complicated, and the completion of the circuit device means that the design is finalized. It is difficult to upgrade and modify the circuit and the cost is high; the integration of components is low and the number is large, which increases the failure rate of equipment and makes operation and maintenance difficult; this method does not use redundant design. The failure of equipment failure will lead to the failure of the rod position indication channel; the single power supply is used, and the failure of the power supply will also cause the failure of the rod position indication channel; this design method uses hard wiring for signal transmission, and the signal lines are many and complicated, which is not conducive to equipment maintenance

[0009] However, the design method of a special platform (TXS platform) needs to be supported by a special technical platform, which is highly specific and not conducive to promotion; and the rod position data acquisition uses a simple parallel receiving method, which greatly increases the input and output The number of ports and cables makes equipment maintenance cumbersome; this design method places the digital maintenance unit at a remote location, and the local device does not have a corresponding operation and maintenance unit, which is not convenient for equipment maintenance; and requires four 900mm (width ) × 400mm (thickness) × 2200mm (height) cabinet, the number of cabinets is large and the area is large, which is not conducive to the layout of the site

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