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Puchalapalli, Sambasivaiah; Tiwari, Shailendra Kumar; Singh, Bhim; Goel, Puneet Kumar
IEEE transactions on industry applications, 2020-Sept.-Oct., 2020-9-00, 20200901, Letnik: 56, Številka: 5Journal Article
This article presents a green energy solution to a microgrid for a location dependent on a diesel generator (DG) to meet its electricity requirement. This microgrid is powered by two renewable energy sources, namely wind energy using doubly fed induction generator (DFIG) and solar photovoltaic (PV) array. The solar PV array is directly connected to common dc bus of back-to-back voltage source converters (VSCs), which are connected in the rotor side of DFIG. Moreover, a battery energy storage is connected at the same dc bus through a bidirectional buck/boost dc-dc converter to provide a path for excess stator power of DFIG. The extraction of maximum power from both wind and solar is achieved through rotor side VSC control and bidirectional buck/boost dc-dc converter control, respectively. A modified perturb and observe algorithm is presented to extract maximum power from a solar PV array. Moreover, the control of load side VSC is designed to optimize the fuel consumption of DG. A novel generalized concept is used to compute the reference DG power output for optimal fuel consumption. The microgrid is modeled and simulated using SimPowerSystems toolbox of MATLAB for various scenarios such as varying wind speeds, varying insolation, effect of load variation on a bidirectional converter, and unbalanced nonlinear load connected at point of common coupling. The DFIG stator currents and DG currents are found balanced and sinusoidal. Finally, a prototype is developed in the laboratory to validate the design and control of it.
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JCR | SNIP | JCR | SNIP | JCR | SNIP | JCR | SNIP |
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