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Proceedings of the 23rd Canadian Conference on Electrical and Computer Engineering, CCECE 2010, Calgary, Alberta, Canada, 2-5 May, 2010; 01/2010
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ABSTRACT: Along with the increasing distributed generation systems, the improvement of information technologies, the development of the power market and the shock of serious blackouts, microgrids will play an important role during electric utility deregulation and restructuring efforts. Therefore, traditional energy management systems (EMS) face many opportunities and challenges. A new generation of EMS is being developed to meet these challenges. Based on current state of the research on distributed generation systems and a review of the development of EMS, this paper summarizes aspects to be considered for development of a new generation of EMS. Besides, the objectives and development of relevant EMS software are presented, which will apply to a laboratorial microgrid containing a photovoltaic generation subsystem, a wind energy generation subsystem, fuel cells, batteries and ultracapacitors. And the proposed EMS software will be developed by using advanced computing technologies to conform with the IEC61970 standards.
Electric Utility Deregulation and Restructuring and Power Technologies, 2008. DRPT 2008. Third International Conference on; 05/2008
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ABSTRACT: Conventional parallel inverter system always includes control functions for interconnections. It is challenging to develop an effective control method for seamless parallel connection for multi-inverters. A communicationless digital parallel inverter system is designed and developed by the authors and reported in this paper. Considering the influence of resistance on the output impedance of an inverter and on its power characteristic, the system is controlled by dual closed-loops of instantaneous output voltage and inductor current feedbacks. This control strategy can improve the output performance of the inverter and allows more accurate applications of the droop theory for parallel inverters. The communicationless paralleling operation of two 1kW inverters controlled by DSP (Digital Signal Processor) has been implemented successfully.
Applied Power Electronics Conference, APEC 2007 - Twenty Second Annual IEEE; 04/2007
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ABSTRACT: This paper presents a low cost power electronic interface for interfacing variable speed small scale wind turbine generators to a single phase distributed generation system. The power electronics architecture employs an AC/DC/AC topology for converting the variable power input from a permanent magnet wind generator to a constant voltage, constant frequency grid. The inverter is unidirectional, transformer less and is able to extract power even at very low wind speeds. Preliminary experimental and simulation results are included.
