IEEE Transactions on Power Electronics · 2009 · 932 citations · 31 references
Electrical EngineeringCurrent ControllersEngineeringDc MicrogridsSmart GridWind TurbinesSystems EngineeringDistributed Control SystemElectric Grid IntegrationPower System ControlPower ElectronicsGrid StabilityGrid Impedance VariationVariable Input PowerPower Systems
The study evaluates various current controllers for grid‑connected distributed power generation systems with variable input power, such as wind turbines and photovoltaic units. The authors compare linear PI, PR, and DB controllers, including an improved DB variant robust to grid impedance changes, assessing their performance under steady‑state harmonic distortion and transient conditions like power fluctuations and voltage faults. Experimental results demonstrate the relative effectiveness of each controller across the tested operating scenarios.
This paper discusses the evaluation of different current controllers employed for grid-connected distributed power generation systems having variable input power, such as wind turbines and photovoltaic systems. The focus is mainly set on linear controllers such as proportional-integral, proportional-resonant, and deadbeat (DB) controllers. Additionally, an improved DB controller robust against grid impedance variation is also presented. Since the paper discusses the implementation of these controllers for grid-connected applications, their evaluation is made in three operating conditions. First, in steady-state conditions, the contribution of controllers to the total harmonic distortion of the grid current is pursued. Further on, the behavior of controllers in the case of transient conditions like input power variations and grid voltage faults is also examined. Experimental results in each case are presented in order to evaluate the performance of the controllers.
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Xiaoming Yuan, W. Merk, H. Stemmler et al. · IEEE Transactions on Industry Applications · 2002 · 805 citations