Generalised voltage control for a multi-purpose switching mode converter
- Authors: Nicolae, Dan-Valentin , Case, M. J. , Machmoum, M.
- Date: 2004
- Subjects: Voltage detectors , Electric circuit breakers
- Language: English
- Type: Article
- Identifier: http://hdl.handle.net/10210/22583 , uj:16213 , Citation: Nicolae, D.V., Case, M.J. & Machmoum, M. 2004. Generalized voltage control for a multi-purpose switching mode converter. SAIEE Transactions, 94(3):165-170.
- Description: Abstract: In this paper, a single-phase switching mode converter acting as a unity power factor rectifier and/or as active power filter with no alteration in the topology is studied. A generalised voltage control taking in consideration the output power of the DC bus is developed. To demonstrate the improved response of the voltage regulator, a battery charger as “unknown dc load” is used
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Current transformer used as a voltage source
- Authors: Nicolae, Dan-Valentin , Van Rensburg, J. F. J. , Case, M. J.
- Date: 2005
- Subjects: Voltage detectors , Electric energy transmission
- Language: English
- Type: Conference proceedings
- Identifier: http://hdl.handle.net/10210/22470 , uj:16204 , ISBN: 9536037432 , Citation: Nicolae, D.V., Van Rensburg, J. F. J. & Case, M. J. 2005. Current transformer used as a voltage source. EDPE 2005 Conference, Dubrovnik, Croatia, 26-29 September 2005.
- Description: Abstract: A direct alternating current source to voltage source converter, which does not employ energy storage components, is presented. Conversion is done by a current steering mechanism in the form of a current transformer with two secondary windings. The direct conversion concept,basic circuit, simulation and experimental results of a reduced scale model are presented.
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The use of multi agent system for monitoring and control of the smelting process in the mining metallurgical sector
- Authors: Siti, M. , Jordaan, J. , Jimoh, A. A. , Nicolae, Dan-Valentin
- Date: 2005
- Subjects: Metallurgy , Power energy , Voltage detectors
- Language: English
- Type: Conference proceedings
- Identifier: http://hdl.handle.net/10210/22052 , uj:16160 , ISBN: 0780393279 , Citation: Siti, M. et al. 2005. The use of multi agent system for monitoring and control of the smelting process in the mining metallurgical sector. IEEE PES 2005 Inaugural Conference and Exposition in Africa, South Africa, 11-15 July, 2005:326-331.
- Description: Abstract: This paper is focusing on the development of intelligent agent technology and application of that technology to the mining and metallurgical sector.We have shown how networks of communicating and cooperating intelligent software agents can be used to implement complex distributed systems. in the mining and metallurgical industries there are processes which cannot tolerate interruption, such as some sequential line chemical processes.
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Automating consumer's connections to the distribution network for enhanced performance
- Authors: Popoola, O. M. , Jimoh, A. A. , Nicolae, Dan-Valentin
- Date: 2010
- Subjects: Power electronics , Electric circuit breakers , Voltage detectors
- Language: English
- Type: Article
- Identifier: http://hdl.handle.net/10210/18674 , uj:16029 , ISSN:1827-6660 , Citation: Popoola, O.M., Jimoh, A. & Nicolae, D.V. 2010. Automating consumer's connections to the distribution network for enhanced performance. International Review of Electrical Engineering, 5(5), October 2010.
- Description: Abstract:Trial and error approach which involves service interruption is usually carried out to resolve unbalance on phases in power distribution system. This approach might improve the phase voltage and current but the resultant effect (change) does not last for too long; thereby reduces the market value in terms of quality and reliability of supply. To enhance the performance of the secondary distribution system there is a need for an automating technology. The aim of this paper is to introduce a method and technology developed for resolving imbalances in a secondary distribution system as a result of the uneven distribution of single phase load across a three phase power system. The technology developed is able to monitor, acquire/display collected data and perform self changing switching actions electronically. This action is in form of rearrangement or transfer of consumer loads for optimal performance of the distribution feeder. The proposed switching technology is based on open- transition switch that enables transfer or rearrangement of consumer loads in a three-phase system within milliseconds with supervisory control system. The following methodologies: System Simulator - Matlab (Simulink), Virtual Instrumentation-Lab VIEW and Hardware implementation were applied for the validation of the proposed technique
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