Hardware-in-the-loop Implementation of a Hybrid Circuit Breaker Controller for MMC-based HVDC Systems

This paper presents a hardware-in-the-loop (HiL) implementation of hybrid circuit breaker (HCB) controllers for the half-bridge modular multilevel converter (HB-MMC) based high-voltage direct current (HVDC) system protection. The HCB controllers with auto-reclosing and fault current limitation capabilities are implemented in a digital signal processing (DSP) board and tested by interfacing it with a HB-MMC based point-to-point (PTP) - HVDC system based on a real-time digital simulation (RTDS) platform. Detailed results for the operation of HCBs based on the RTDS are presented. The results demonstrate the performance of HCB controllers implemented in DSPs during DC-faults including the auto-reclosing operation and fault-current limiting capability.

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