The Control Stage of a Modular Multilevel Converter-based Arbitrary Wave shape Generator for Dielectric Testing of High Voltage Grid Assets
Dhanashree Ashok Ganeshpure (TU Delft - High Voltage Technology Group)
Thiago B. Soeiro (University of Twente)
Mohamad Ghaffarian Niasar (TU Delft - High Voltage Technology Group)
Peter Vaessen (KEMA Laboratories, TU Delft - High Voltage Technology Group)
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Abstract
A Modular Multilevel Converter (MMC)-based Arbitrary Wave shape Generator (AWG) for High Voltage (HV) testing faces challenges in the control hardware to generate kHz-range high-frequency waveforms. Real Time Simulators (RTS) provide a simple way to implement the control of the MMC-based AWG in the FPGA. One of the commercially available RTS named Typhoon HIL is found to satisfy the small simulation step requirement such as minimum of 200 ns for generating kHz-range high-frequency waveforms. The performance of Typhoon HIL device is demonstrated with a scaled-down prototype of MMC-based AWG where sinusoidal and other arbitrary waveforms are generated up to 5kHz with a THD less than 5 %.