In this presentation we will present a custom instrumentation and control platform which was developed to interface an RTDS to power electronic amplifiers via a digital fibre optic interface. The platform is modular and reconfigurable, allowing interfacing to a range of sensors and actuators. For power electronic applications, this typically includes voltage and current sensors, and switching converter gating and status signals.
The platform features an FPGA SoC controller including both programmable logic and dual ARM processor cores. This permits high-bandwidth and low-latency DSP, control and pulse-width modulation tasks to be implemented locally. Four SFP+ ports operating at line rates up to 6.6 Gbps are available for direct communication of sampled values to/from the RTDS, or between modules. A range of possible communication topologies are supported.
Two recent projects targeting PHIL applications which utilise the platform will be presented and discussed. Firstly, a strategy for current balancing in parallel interleaved converters for high-power amplifiers will be demonstrated. Secondly, resampled PWM as a technique to improve amplifier bandwidth in switching-frequency and/or control time-step constrained applications will be discussed.
Mark Broadmeadow, Queensland University of Technology