[en] Temperature feedback control system of the HL-2A tokamak vacuum chamber baking is designed. The approximate mathematical model was adopted by experimental method, and the step response model of HL-2A baking system was established. Design analysis of system performance index was applied by the control theory, stability analysis of control system was conducted by Simulink software, and the system of hardware and software was implemented with Siemens PLC300 system. (authors)

[en] In order to meet the increasing experimental requirements of HL-2A tokamak device discharge and improve the integration of HL-2A host centralized control system, this paper designs a high-speed data acquisition system based on PXI Express for HL-2A host engineering parameters. It mainly describes how to realize the communication between d fast acquisition signal system based on C and the upper layer OPI through the PON network under the EPICS platform. The system hardware adopts PXIe-based chassis, embedded controller and high-speed synchronous acquisition card, which has the advantages of good mechanical encapsulation, high modularity and high sampling rate. The software adopts a measurement and control system development platform based on Microsoft .NET platform, Visual Studio development environment and Visual C language.

[en] The control of some typical Tokamak discharge waveforms has been achieved by using plasma current waveform adjusting system ZLJ in the ohmic heating of HL-1. The discharge waveforms include a series of regular plasma current waveforms with various slow rising rate, such as 80 kA, 450 ms long flat-topping; 100 kA, 200 ms rising; 200 ms falt-topping and 180 kA, 400 ms slow rising etc. The design principle of the system and the initial experimental results are described

[en] HL-2A host centralized control system development based on Experimental Physics and Industrial Control System (EPICS) is described in detail in this paper. Communication between Soft IOC and PLC was realized using the s7nodave device driver module, and the PLC of the subsystems was integrated to the EPICS control system. Through extension and configuration in relational database and data archive and alarm component of CSS application, real-time communication between OPI layer and each subsystem was realized. HL-2A host measurement and control system parameters centralized successfully on the EPICS platform prepare for the design on the next generation device host centralized measurement and control system. (authors)

[en] The HL-2A control system consists of timing system, PLC logic control system and feedback control system. The timing system gives absolute time to all technical subsystems; the PLC logic control system provides synthetic logic conditions to the timing system and takes charge of personnel and machine protection; the feedback control system controls the plasma current, plasma position and plasma shape, which is essential to optimize plasma performance. The purpose and process of discharge management are introduced. The implementation of discharge management software is presented with emphasis on its dedicated data structures and its underlying software specifications. Software interface design principles are also discussed

[en] The ECRH water cooling system of HL-2A tokamak has been successfully developed, the maximum flux and pressure of this system reach 94m³·h^-1 and 0.6MPa, respectively. The system design, the pressure control, and the parameter measurement are briefly introduced; the water-resistance calculation under high voltage condition has been done, and the leak electric current in the cooling water loop of the gyrotron-anode has been measured to be less than 1mA. (authors)