KHAN, MOHAMMAD SAMEER. Analysis of Flyback-PV Inverter to Enable Low Voltage Ride-Through (LVRT) Operation During Grid Fault. (Under the direction of Dr. Subhashish Bhattacharya). Flyback based PV micro-inverter is a very popular low-cost solution for integrating the photovoltaic (PV) module to an AC grid. As the penetration level of these inverters in the grid is increasing, it may cause probl...

E-mail address: [email protected]; [email protected] Abstract This article presents the development of an optimized droop controller of microgrid during islanding using artificial fish swarm algorithm (AFSA). This is necessary in order to minimize the frequency deviation that occurs when microgrid switches to stand-alone mode or when there are changes or variation in loads. The optimize...

Parallel connection of inverter modules is a solution to increase reliability, efficiency and redundancy of inverters in Micro-Grid system. Proper load sharing among parallel inverters is a key point. The circulating current among the inverters can greatly reduce the efficiency or even cause instability of the system. In this paper, a control strategy for improving the load sharing performance ...

This report describes the various methods and circuits that have been developed to detect an islanding condition for photovoltaic applications and presents three methods that have been developed to test those methods and circuits. Passive methods for detecting an islanding condition basically monitor parameters such as voltage and frequency and/or their characteristics and cause the inverter to...

A novel, multistage approach to passive islanding detection is presented which uses a decision-tree-like classification algorithm. The novelty of the proposed method is centered on the way in which features are passed to subsequent stages of the decision tree (DT). A traditional DT uses a single feature set while in the modified algorithm, feature sets extracted using different sized time windo...

Recent developments in power electronics technology have emerged towards the generation of electrical power from the renewable energy sources. Among renewable energy sources, solar energy has garnered more importance because of less maintenance and environmental friendly. In grid connected mode, distributed power generation system (DPGS) requires reliable islanding detection technique to find t...

Protection and control systems represent an essential part of distribution networks by ensuring the physical integrity components improving system reliability. devices isolate a portion network affected fault, while reduce number de-energized loads transferring to neighboring feeders. The integration distributed generation has potential enhance continuity energy services through islanding opera...

The growth modes of Ge islands on SiNx -covered Si with and without a surfactant Sb layer are studied by scanning tunnelling microscopy. It is observed that on SiNx /Si(111), Sb cannot enhance the coverage of (111) facets of Ge islands, which are the dominant features in the late stage of Ge overlayer growth when Sb is not used. However, on SiNx /Si(001), Sb favours the growth of Ge(001) facets...

Distributed generation is a form of electric power privatization. Consumers install their own power station to supply the local loads and/or share in the utility loads. Many protective problems have been developed due to the existence of these distributed generations. However, a protective strategy should be developed to protect the system and the generator itself from different hazards. One pr...

Hurricane, as one of the most frequent natural events, causes damage to infrastructure upstream networks multiple energy carrier microgrids (MECMs). Thus, supply continuity critical loads is threatened due sudden islanding MECMs from networks. Therefore, providing a framework enhance resilience against this threat necessary. In response issue, paper presents proactive optimal operation scheduli...