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CONTROL OF A THREE PHASE UPS INVERTER WITH UNBALANCED AND NONLINEAR LOAD
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| Author(s) |
Peter Korondi; Laszlo Nagy; Geza Nemeth |
| Abstract |
The paper is concerned with a control system of a three phase sinusoidal output voltage UPS inverter capable of operating with unbalanced and nonlinear (e.g. computer) load. For the sake of short response time for step change of the switched mode load, instantaneous feedback is used. Because of inter dependence of phases, the Park vector is introduced for the 3-phase to 2-phase transformation. The controller keeps the Park vector of the output voltages on a circular path to ensure sinusoidal output waves. The Park vector phase components are controlled in non-ideal sliding mode using a hysteresis relay with an additional zero phase sequence elimination. Simulation and experimental results for a 100 KVA are presented. |
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| Filename: | Unnamed file |
| Filesize: | 2.464 MB |
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| Type |
Members Only |
| Date |
Last modified 2019-08-15 by System |
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