Abstract
The increasing use of complex grid-connected technological components in safety-critical applications like public transportation or distributed power systems requires a precise evaluation of the reliability and robustness of these pieces of equipment during their development. Direct on-field tests of high-power systems are generally not possible. A conventional method of getting around this problem consists in using software-based simulation to analyze the behavior of the electric equipment under test (EUT) under normal and transient operation conditions of the grid. However, signal-level simulation is not able to perfectly reproduce every detail of a physical phenomenon. This publication describes a cost-effective realization of a power-hardware-in-the-loop (PHiL) grid emulation system combining two inverters with different electrical characteristics (type of semiconductor, switching frequency, dc link, etc.). The proposed grid emulator is a controllable power source not only capable of emulating low-frequency (50 Hz) transient faults as voltage sags but also high-order harmonic components usually present in the voltage waveforms of the utility grid (e.g., noise). A downscaled 5-kVA laboratory prototype has been implemented and the experimental results shown in this paper demonstrate the emulator's ability to combine high power with high dynamics.
Originalsprache | Englisch |
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Aufsatznummer | 7428899 |
Seiten (von - bis) | 3193-3202 |
Seitenumfang | 10 |
Fachzeitschrift | IEEE Transactions on Industry Applications |
Jahrgang | 52 |
Ausgabenummer | 4 |
DOIs | |
Publikationsstatus | Veröffentlicht - 1 Juli 2016 |