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In this paper, we detail the design, analysis, and implementation of a highly distributed off-grid solar photovoltaic dc microgrid architecture suitable for rural electrification in developing countries. The proposed architecture is superior in comparison with existing architectures for rural electrification because of its 1) generation and storage scalability, 2) higher distribution efficiency (because...
Solar photovoltaic based microgrids and nanogrids are becoming very popular in many developing countries due to lowering panels and balance of system costs. While many nanogrids (isolated houses with solar generation or small integrated community with very low power provisioning) have been popular, the need for interconnecting these for bidirectional power transactions is growing. This allows efficient...
Growing population, globalization and an increased focus on industrialization by all countries has caused an explosive rise in the global energy demand. Electric energy has emerged as the most important form of energy over the years. In the developing world, there is acute shortage of electricity and countries have to rely on forced load-shedding in order to manage high demand during peak hours. In...
A novel bidirectional dc circuit breaker topology is investigated for operation in dc microgrids to help in protection schemes against short circuit faults. When a short-circuit fault occurs, the proposed topology utilizes a Z-source breaker circuit to naturally commutate off the SCR by diverting the current and reducing the current to zero through the SCR, thus avoiding circuit breaking under high...
Power Line Communication (PLC) is one of the most promising contender for Advanced Metering Infrastructure (AMI). There are other contending communication technologies but PLC has an inherent advantage of using existing power lines that makes it an attractive choice. In this paper we present a detailed analysis of the tests conducted for investigating the feasibility of PLCs as part of AMI on the...
In this work, central and distributed architectures of DC microgrids for rural electrification are analyzed under various operating conditions. In the proposed scheme, a single household consumer forms the atomic nanogrid unit which may integrate its resources in a scalable model with the community to form a microgrid, without dependence of the national grid. The flow of power between houses and the...
Large HVAC systems are good candidates for elastic loads in demand side management optimization of smarter grid infrastructures. There is an increaseing trend of using Split-type Air Conditioners (ACs) in residential, commercial and industrial setups for fine granularity temperature control. The traditional control in each unit is through duty-cycle based hysteretic method which is simple but inefficient...
Split-Type Air Conditioners (ACs) are extensively used in households, commercial organizations and industrial setups. The duty-cycle based hysteretic control is inefficient and requires high power provisioning of full startup current for the compressor at each turn-on. This is especially demanding in constrained power systems with weak grids where people are dependent on backup generators and UPS...
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