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Abstract
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Article Information:
Adaptive Modified Hysteresis Current Control for Reduction of Switching Losses in Grid Connected Solar Inverters
Preethi Thekkath and S.U. Prabha
Corresponding Author: Preethi Thekkath
Submitted: January 04, 2014
Accepted: January 17, 2014
Published: June 25, 2014 |
Abstract:
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Current Control logic plays an important role in the performance of Grid connected inverters. In the present work Adaptive Modified Hysteresis controller has been used for generation of switching pulses to the minimally switched grid connected inverter. Different from the previous works the new control logic helps in maintaining the instantaneous switching frequency low and nearly constant with reduction of switching losses to one-third of that of the conventional type. Considerable reduction in Total harmonic distortion of supply current, better DC bus voltage stabilization, good reactive power compensation, satisfactory performance under unbalanced source and load conditions and good dynamic response is also achieved. The experimental verification is done using SIMULINK/REALTIME WINDOWS TARGET. Present control logic is compared with conventional hysteresis controller with and without adaptive control to prove the effectiveness.
Key words: Adaptive current control, modified hysteresis controller, reactive power compensation, switching frequency, switching losses, total harmonic distortion,
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Cite this Reference:
Preethi Thekkath and S.U. Prabha, . Adaptive Modified Hysteresis Current Control for Reduction of Switching Losses in Grid Connected Solar Inverters. Research Journal of Applied Sciences, Engineering and Technology, (24): 5110-5118.
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ISSN (Online): 2040-7467
ISSN (Print): 2040-7459 |
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