Power Electronics HIL demo with the new OP8666 RCP
Real-time simulation has gained acceptance as an essential tool in R&D activities over the last two decades. It offers many attractive features as it reduces time-to-market, allows design flexibility, and validates the distinct phases of the concept. In this webinar, the real-time simulator OP4510 from OPAL-RT is used to simulate a three-phase three-level NPC converter with a DC source and a capacitor bank located upstream, and a LC filter connected to a controllable three-phase AC-source, located downstream.
The inverter is controlled according to three different control schemes: (i) all-in-one where the system and control are all simulated in the OP4510 simulator, (ii) loopback, where signals are sent out of the OP4510 and then looped back in, and (iii) Rapid-Control-Prototyping where the control algorithm is implemented in the new OP8666 RCP module from OPAL-RT. Needless to say that the third scheme represents the most realistic case used in industry, where the control developer keeps enhancing the design of the controller inside OP8666 until it reaches a mature level.
A description of the hardware of the OP8666 is covered first featuring the architecture of the system, the ADC components, the PWM generators and the DSP. The software programming tool using Matlab toolbox is highlighted then with the NPC control as a case study. The connection between the two pieces of hardware, namely, OP4510 and OP8666 follows. Peculiarities such as: filtering, analog and digital reading, synchronization, offset and bias removal, etc. are addressed. Performance of the overall system., i.e., the controlled NPC converter are summarized for the three schemes cited above.
Knowing that the NPC converter belongs to the power electronics courseware developed by OPAL and extensively used in many electrical engineering departments worldwide, future RCP applications featuring OP8666 with the electric motor drives courseware and the renewable energy courseware are announced.