Design Of Monitoring And Protection System For ITER SMF Test Facility

The ITER static magnetic field test facility can generate specific magnetic field conditions and is used to conduct static magnetic field qualification tests on all electromechanical equipment entering the ITER experimental site.The ITER static magnetic field test facility has the characteristics of multiple subsystems,mixed signal types and large interference from magnetic fields.In order to ensure the normal conduct of the static magnetic field qualification test,to protect the safety of the machine and the personal safety of the operator,the monitoring and protection system of the facility is indispensable.This paper proposes a set of monitoring and protection system design schemes implemented on the Lab VIEW platform and verifies some functions.First of all,this article takes the design of the functional requirements of the system as the breakthrough point,clarifies the design elements of the monitoring and protection system of this facility,and proposes an integrated design plan for the system.The design integrates the hardware platform framework of NI CompactRIO embedded system,NI PXIe and Ethernet switching technology,and meets ITER’s requirements for I&C field control system architecture.The producer-consumer LabVIEW program framework based on the message loop has the characteristics of high cohesion,low coupling,strong scalability and easy maintenance.Secondly,on the basis of integrated design,the detailed hardware design of the monitoring and protection system has been completed.Carry out structural design and equipment selection from the sensor layer,signal interface layer,controller and host layer.Select the sensor types for the various signals proposed in the signal acquisition requirements,and determine the installation location and quantity.Design 3 types of signal conversion circuit to match the I/O module and data acquisition card interface parameters.Configure the lower computer of the NI CompactRIO embedded system to share the system signal acquisition and safety interlocking tasks,which can improve the operating efficiency of the system.Configure NI PXIe acquisition chassis and data acquisition card to acquire fast signals with a sampling rate of more than 10kHz.Taking into account the static magnetic field interference generated by the equipment,the optical fiber communication method is used to achieve long-distance transmission,which effectively weakens the magnetic field interference.Finally,the main software function of the system is developed and verified,and the human machine interface is designed.Realize the function of data acquisition,water cooling remote control,alarm logic processing and safety interlock protection module.The interactive interface reflects the main functions and meets the functional requirements of the system.The function of fast AI acquisition,slow AI acquisition,DI signal acquisition and DO command issuance are verified,providing necessary conditions for subsequent joint debugging.