Type of Document	Dissertation
Author	Ren, Wei
Author's Email Address	rren@caps.fsu.edu
URN	etd-08172007-162247
Title	Accuracy Evaluation of Power Hardware-in-the-Loop (PHIL) Simulation
Degree	Doctor of Philosophy
Department	Electrical and Computer Engineering, Department of
Advisory Committee	Advisor Name Title Thomas Baldwin Committee Chair Mischa Steurer Committee Co-Chair Hui Li Committee Member James Simpson Committee Member
Keywords	Simulation Accuracy HIL Hardware-in-the-Loop Simulation Interface Algorithm
Date of Defense	2007-07-02
Availability	unrestricted
Abstract A Power Hardware-in-the-Loop (PHIL) simulation should be accurate to truly reflect the behavior of the systems under test. However, a PHIL simulation may result in errors or even instability due to imperfections (e.g., time delay, noise injection, phase lag, limited bandwidth) in the power interface. This issue is especially problematic in high power applications. Additionally, it is usually difficult to determine the accuracy of simulation results because there is no reference available. Consequently, a method is needed to evaluate the accuracy of PHIL simulations. In this thesis, an effective method for evaluating the accuracy of PHIL simulations is proposed. This method provides a means to justify the result of a PHIL simulation analytically and quantitatively instead of empirically. In the derivation of the method, it is also found that the magnitude of the system’s open loop transfer function can be taken as one of the most important performance indices for evaluating different interface algorithms. This conclusion is significantly useful for the selection of the optimal interface algorithms and for the future design of advanced interface algorithms. Although the proposed method is derived based on linear system analysis, it is shown to be effective for many nonlinear systems also. Simulations and experiments are performed for the purpose of validation. Limitations of the method are also discussed. For cases where the proposed method fails to be effective, a simulation-only method is proposed and explained as the future work.
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