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dc.contributor.advisorVinatha, U.-
dc.contributor.authorJayasankar, V. N.-
dc.date.accessioned2020-09-18T09:42:13Z-
dc.date.available2020-09-18T09:42:13Z-
dc.date.issued2019-
dc.identifier.urihttp://idr.nitk.ac.in/jspui/handle/123456789/14521-
dc.description.abstractThe incorporation of the abundantly available wind and solar energy to the grid using power electronic converter based interfaces makes a reliable hybrid renewable energy system. Assigning harmonic mitigation property to the grid interfacing inverter to mitigate the current harmonics created by the non-linear loads at the load centres, is a cost-effective solution. The inverter controller consists of an outer DC-link voltage control loop and an inner current harmonic mitigation loop. The limitations of existing DC-link voltage controllers are poor stability margin, steady-state error and chattering problem. The widely used pq theory based inner loop controller offers poor performance under non-ideal grid voltage conditions. The conventional low pass filter based fundamental component extraction methods used in pq theory possess some limitations such as additional time delays and low-frequency oscillations. The main focus of this research is the design, simulation, implementation and analysis of a grid-tied wind-solar hybrid renewable energy system with shunt and series active filtering functionalities, under different system conditions. A Backstepping controller based outer loop, with enhanced DC-link loss compensation capability is proposed for the shunt active filter to overcome the limitations of the existing DC-link voltage controllers. The limitations of conventional low pass filter based fundamental component extraction methods are overcome by employing a self-tuning filter in the inner loop of the shunt active filter. An additional self-tuning filter is incorporated to improve the effectiveness of pq theory under non-ideal grid conditions. A self-tuning filter and a Fuzzy logic-based voltage controller are employed to control the series active filter effectively. A laboratory prototype of the shunt active power filter is implemented. The control algorithm is realised in Xilinx Basys-3 FPGA. From the simulation and hardware test results under steady-state and dynamic conditions, it is found that the proposed controller offers better stability, robustness and speed compared to other existing control methods.en_US
dc.language.isoenen_US
dc.publisherNational Institute of Technology Karnataka, Surathkalen_US
dc.subjectDepartment of Electrical and Electronics Engineeringen_US
dc.subjectPower qualityen_US
dc.subjectActive power filteren_US
dc.subjectGrid-tied renewable systemen_US
dc.subjectBack stepping Controlen_US
dc.subjectDual Self Tuning Filteren_US
dc.subjectFuzzy logicen_US
dc.subjectDC-link voltage controlen_US
dc.titleGrid Connection of Wind-Solar Hybrid Renewable Energy System, with Active Power Filter Functionalityen_US
dc.typeThesisen_US
Appears in Collections:1. Ph.D Theses

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