Nelson River Bipole I/II Line Commutated Converter (LCC) HVdc system has been in operation for more than 40 years and carries about 70% of total Manitoba Hydro power. The recent addition of Bipole III has formed a multi-infeed HVdc system with tightly coupled converter stations at both ends. Due to the
complexity of the three Bipoles in a multi-infeed system, a largescale hybrid real time hardware-in-the-loop (HIL) simulation model was developed with a combination of software models in Real Time Digital Simulator (RTDS) for Bipole I/II and the hardware replicas for Bipole III controls to support Bipole III
commissioning and the future three-bipole planning, operation and maintenance efforts.
In the paper, a RTDS modeling approach of Bipole I/II AC/DC system is introduced and discussed. This modeling approach includes the strategic design to fully utilize the library components in the page modules for AC/DC controls and the modeling structure of dividing a large HVdc system into many standalone modular systems. The paper also describes the use of a large-scale hybrid simulation model during on-site commissioning of Bipole III system. Such engineering practice has significantly reduced the
technical risks, financial cost and secured the success of the Bipole III commissioning.
C. Zhou, C. Fang, M. Kandic, P. Wang, K. Kent, D. Menzies, Presented at International Conference on Power Systems Transients (IPST2021) in Belo Horizonte, Brazil June 6-10, 2021.
KEYWORDS: Electromagnetic Transient for Direct Current (EMTDC), Real Time Digital Simulator (RTDS), Line Commutated Converter (LCC), Hardware-in-the-Loop (HIL), Northern Collector System (NCS), Hybrid