alexa Analysis of Output DC Current Injection in Grid Connec
ISSN ONLINE(2278-8875) PRINT (2320-3765)

International Journal of Advanced Research in Electrical, Electronics and Instrumentation Engineering
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Research Article

Analysis of Output DC Current Injection in Grid Connected Inverters

Sneha Sunny George1, Robins Anto2, Sreenath B3
  1. PG Scholar, Department of EEE, Amal Jyothi College of Engineering, Kanjirappally, Kottayam, Kerala, India1
  2. Assistant professor, HOD, Department of EEE, Mar Baselios Christian College of Engineering and Technology, Peerumade, Kerala, India 2
  3. Assistant professor, Department of EEE, Amal Jyothi College of Engineering, Kanjirappally, Kottayam, Kerala, India 3
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Abstract

Solar energy technologies have gained much importance in the recent scenario due to their ability to produce clean, reliable, useful power. Grid connected Photovoltaic system requires conversion from DC to AC to harness the useful energy produced. A Photovoltaic inverter directly connected to the grid can cause, besides the generation of several current harmonics, a DC current component injection. Excessive DC current injection into the AC network can result in problems such as increased corrosion in underground equipment and transformer saturation. The paper aims at evaluating the output DC-current injection in grid connected inverter used for a 100kW solar power plant installed at Amal Jyothi College of Engineering, Koovapally, through experimental analysis. A simulation based study on output DC current injections in inverters with two different multilevel topologies is also conducted.

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