Non-communication protection method for meshed and radial distribution networks with synchronous-based DG |
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Affiliation: | 1. The Grenoble Electrical Engineering Laboratory (G2Elab), Saint Martin d’Hères, France;2. CNRS, CRETA and Grenoble-InP, Saint Martin d’Hères, France;3. Univ. Grenoble Alpes, G2Elab, F-38000 Grenoble, France;1. Universidad Simón Bolívar, Caracas, Venezuela;2. Universidad Carlos III de Madrid, Madrid, Spain;1. Electrical Engineering Department, University at Buffalo, United States;2. Engineering Technology Department, Buffalo State College, United States;1. State Key Laboratory of Alternate Electrical Power System with Renewable Energy Sources, North China Electric Power University, Beijing 102206, China;2. Bradley Department of Electrical and Computer Engineering, Virginia Polytechnic Institute and State University, Blacksburg, VA 24061, USA |
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Abstract: | This paper presents an efficient protection method which can be used for both meshed and radial distribution networks (DNs) with synchronous-based distributed generation (SBDG) units. The method does not require any communication system in the both grid-connected and islanded modes of operation. The microprocessor-based relays used in the DNs are programmed with a new time-current-voltage characteristic utilising only local fault voltage and current magnitudes. The proposed method is verified by simulation study on the DN of IEEE 30-bus test system as a meshed network in grid-connected mode. The method is also tested on an Iranian practical radial DN in the both grid-connected and islanded modes of operation. The test cases include different fault conditions, with SBDG at various locations and different DG penetration levels, and also without any SBDG in the networks. It is shown in a comparative study that the new time-current-voltage characteristic achieves a notable reduction in total relay operating times without any communication links. In addition, the method uses the same protection settings for the both grid-connected and islanded modes of operation. |
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Keywords: | Distribution networks Non-communication protection Non-standard characteristic Meshed and radial DN protection Synchronous-based DG Protection coordination |
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