P233-Investigations Into the Control and Protection of an Existing Distribution Network to Operate as a Microgrid: A Case Study-2014-شبیه سازی آماده مقاله
شبیه سازی آماده مقاله
Abstract—With the increasing attention to the concept of microgrids, it has become important to identify the requirements
that enable an electric distribution network to operate as a microgrid. This paper studies a realistic distribution network to
accomplish the following: 1) determine the conditions under which the network can operate as a microgrid and 2) present the control scenarios that allow the islanded operation of the network. In particular, the employment of electronically coupled distributed energy resources with the fault-ride-through and synchronization capabilities is investigated. Another objective of this paper is to propose practical protection strategies that are effective in both operational modes of a microgrid (i.e., the grid-connected mode and the islanded mode), considering the system constraints; the protection strategies provide the microgrid with acceptable reliability against different fault scenarios. The effectiveness of the
control and protection strategies is demonstrated and discussed through a comprehensive set of simulation studies conducted in the PSCAD/EMTDC software environment.
Index Terms—Distributed generation, fault, islanded mode, microgrid, power system protection, renewable energy systems.
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