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Design and Hardware Implementation of Real-Time Simulator for Power Electronic Systems

Labbaf, Mohamad | 2016

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  1. Type of Document: M.Sc. Thesis
  2. Language: Farsi
  3. Document No: 48646 (05)
  4. University: Sharif University of Technology
  5. Department: Electrical Engineering
  6. Advisor(s): Hashemi, Matin; Parniani, Mostafa
  7. Abstract:
  8. Real-time simulators are playing a critical role in the design of power electronic systems. Using real-time simulator enables designers to reduce the time and cost of design by employing hardware-in-the-loop technique. In addition, this simulator can potentially reduce the risks which are associated with performing tests on actual systems. In this thesis, a real-time simulator is designed and implemented for power electronic applications. Concerning the fact that power switches are one of the most important elements in this simulator, an ideal switch model with conduction resistor and RC snubber circuit is used. This model is more accurate as compared to other models in the literature.However, using this model, any change in the status of switches is reflected in the network admittance matrix.Therefore, each time-step requires solving the whole system of equations, which is a major challenge in developing this real-time simulator.To overcome this challenges, a modifed version of the Gauss-Jordan elimination method for solving the resultant linear equations is proposed, in which a normalized pivot element is introduced that prevents arithmetic overflows.On the other hand, in this algortihm, only one division is used while GaussJordan algorithm requires n divisions for n×n matrix. Accordingly, due to the huge computational load of the division operator, any reduction in the num-ber of divisions reduces the fnal time-step of the simulator. At last, Simulink and experimental setup are used as a reference to evaluate the accuracy and correctness of the designed simulator
  9. Keywords:
  10. Hardware in the Loop ; Real-Time Simulation ; Electromagnetic Transient Analysis ; Hardware Implementation ; Nodal Analysis ; Modified Gauss-Jordan

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