| With the development of power system, electric power system components such as modular multilevel converter and the emergence of power transmission from west to east to accelerate the pace of the AC power transmission distance more and more far,AC and DC operation power grid structure being more and more complicated, and the electric network operation safety requirements are gradually improve,digital simulation is an economical and convenient way to study complex power system, and it is also an indispensable part of the power system operation safety and control strategy evalution.In the background of Luxi BTB HVDC project which one station contains two different types of converter units, with the RTDS simulation environment, to build a main structure simulation model of hybrid BTB station who includes two different units LCC and MMC. Then by the CBuilder function of RTDS, the control program in the actual project is converted to custom control components of the simulation model, so we can make the simulation model become a full digital close-loop experimental system which can independent operation without control and protection devices. Because of the full digital simulation model can running without external control devices, so its cost less in hardware and esay to build the experimental environment, besides the custom control components from CBuilder will effectively reduce using of computing resources and make its easy to transplant code in different simulation environment. In order to validate the development of custom control components, some experiments were carried out using the full digital simulation model, and compared with the close-loop experimental system that contains control devices and field operation waveform.The result shows that the control components developed in this paper has the same control effect, it’s suitable for the simulation and research on control effect, fault characteristic and protection strategy. |
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