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Additional Overloading Assessment for Future Low Voltage Networks Based on Smart Metering

Journal of Energy and Power Engineering 2013年第5期7卷 917-927页

作者： Petr Kadurek Sjef Cobben Wil Kling Electrical Energy Systems Faculty of Electrical Engineering Eindhoven University of Technology Eindhoven 5600 - 5658 TheNetherlands alliander Arnhem 6812 AH The Netherlands

The purpose of this article is to present an additional overloading assessment scheme to the current protection scheme, which can be applied in the low voltage distribution network to prevent overloading of network assets. As higher penetration of distributed generators is envisioned among distribution networks, the network operators will have an challenging task in the future to maintain the reliability and quality of supply. The distribution networks are going to be challenged simultaneously by increasing penetration of distributed generators and by increasing loading （inter alia heat pumps, air conditioners or electric vehicles）, which will change the operational perspective of the future distribution networks. Presented simulation results show that the increasing penetration of those appliances can jeopardize the functionality of current protection scheme in distribution networks. Therefore, an additional scheme for assessment of network overloading applicable at low voltage distribution networks is proposed and the application of this scheme, supported by smart metering infrastructure, is demonstrated in a case study. The proposed overloading assessment scheme should help the network operators to increase the flexibility of distribution networks, their hosting capacity, safety and reliability.

关键词： Smart grids power system protection power system reliability power distribution.

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Addressing Low Voltage Network Power Quality Issues through the Implementation of a Microgrid

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Journal of Energy and Power Engineering 2011年第9期5卷 870-876页

作者： J. Lava J.F.G. Cobben W.L. Kling F. van Overbeeke Department of Electrical Engineering Eindhoven University of Technology MB Eindhoven 5600 The Netherlands alliander N. V Utrechtseweg 68 AH Arnhem 6812 The Netherlands EMforce B. V. AD Krimpen aan den ljsse12920 The Netherlands

The results of the implementation of an actual microgrid in the Netherlands are presented. This microgrid has photovoltaic panels as microsources, energy storage, and a flexible AC distribution interfacing system that can operate connected to the public grid or autonomously where it regulates the site＇s voltage and frequency. In this paper, the potential of the microgrid in improving power quality issues of the site, specifically harmonic distortions, is demonstrated. Results show that flexible AC distribution interfacing system devices were able to compensate voltage harmonics when the microgrid was operating connected to the public grid and when operating autonomously. Other tests such as short-circuit, synchronization and blackstart were also conducted. The improvement in power quality and positive results of the other tests demonstrate that a self-supporting, reliable and efficient operation of the microgrid can be achieved.

关键词： Microgrid power quality FACDS harmonic compensation.

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