This paper presents the controller hardware-in-loop (CHIL) testing of Xiamen bipolar MMC-HVdc project based on Real Time Digital Simulator (RTDS). It revealed the system instability of MMC-HVdc converter and its controllers for the first time. The CHIL tests show that, the small signal stability of Xiamen bipolar MMC-HVdc project is related to the system controller and circulating current suppression controller (CCSC). Also the parameters of smoothing reactors and transmission line have a great impact on the system stability. The CHIL testing and RTDS simulation results prove these findings, which are essential to the real project control and protection system designing.
H. Ding, Y. Wu, Y. Zhang, Y. Ma, R. Kuffel, Presented at the 12th IET International Conference on AC and DC Power Transmission (ACDC 2016), Beijing, China, May 28 - 29, 2016
KEYWORDS: controller hardware-in-loop (CHIL), high voltage direct current (HVDC), modular multi-level converter (MMC), small-signal analysis (SSA), voltage-source converter (VSC).