Control and protection of a microgrid connected to utility through back-to-back converters
MetadataShow full item record
This paper discusses the control and protection of a microgrid that is connected to utility through backto-back converters. The back-to-back converter connection facilitates bidirectional power flow between the utility and the microgrid. These converters can operate in two different modes–one in which a fixed amount of power is drawn from the utility and the other in which the microgrid power shortfall is supplied by the utility. In the case of a fault in the utility or microgrid side, the protection system should act not only to clear the fault but also to block the back-to-back converters such that its dc bus voltage does not fall during fault. Furthermore, a converter internal mechanism prevents it from supplying high current during a fault and this complicates the operation of a protection system. To overcome this, an admittance based relay scheme is proposed, which has an inverse time characteristic based on measured admittance of the line. The proposed protection and control schemes are able to ensure reliable operation of the microgrid.
Showing items related by title, author, creator and subject.
Fan, Y.; Goyal, M.; Ghosh, Arindam; Shahnia, Farhad (2014)An integration of a Permanent Magnetic Synchronous Generator (PMSG) based Wind Energy ConversionSystem (WECS) into a microgrid is discussed in this paper. A back-to-back Voltage Source Converter (VSC) is employed for the ...
Susanto, Julius; Shahnia, Farhad; Ghosh, Arindam; Rajakaruna, Sumedha (2014)This paper presents the back-to-back interconnection of two autonomous microgrids. A back-to-back converter topology, referred to as an interchange converter, is used to provide dynamic frequency support for each autonomous ...
Rosyadi, M.; Muyeen, S.M.; Takahashi, R.; Tamura, J. (2011)This paper presents a new control strategy of variable speed permanent magnet wind generator for stability augmentation of wind farm including fixed speed wind turbine with Induction Generator (IG). A new control scheme ...