Induction Machine Emulation For Open Circuit and Short Circuit Grid Faults

Abstract

The focus of the present research work is to develop a robust induction machine emulator. The emulator can be used to test different types of open circuit and short circuit grid faults along with starting and loading transients. Power hardware in loop (PHIL) technology is used for the machine emulation. It requires a highly accurate and adaptable model for the chosen test cases and opted emulator configuration. For open circuit fault test case, the induction machine mathematical model is developed systematically to emulate the machine backemf at the open circuit terminals. The proposed model adapts to the chosen emulator configuration by incorporating the emulator parameters in it. Finally, the novel induction machine emulator proves its robustness and performance not only for open circuit faults but also for short circuit, starting and loading fault transients. Open circuit auto reclosing analysis and considerations in developing reclosing algorithms are detailed. Identification of different fault signatures, which aid fault diagnosis are also briefly presented.