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The penetration of distributed generation (DG) in electrical power systems is rapidly increasing these days and more attention is drawn to maintaining a healthy distribution system. Islanding operation of DG is one of the biggest challenges. When Islanding occurs, the power supply from the main grid is interrupted which causes a problem when distributed generators keep providing power into the distribution...
Summary form only given. Microgrids have been proposed as a way of integrating large numbers of distributed renewable energy sources with distribution systems. One problem with microgrid implementation is designing a proper protection scheme. It has been shown that traditional protection schemes will not work successfully. In this paper a protection scheme using digital relays with a communication...
Selection of the DG interconnection protective relay is based on several criteria such as power system characteristics, the dynamic response of the generator, the system grounding, the DG transformer connection, etc., as well as the protection policy of the utility and coordination requirements. The interconnection protection IED design can be summarized as follows: Disconnection of DG plants when...
In order to eliminate the influences caused by micro-grids on distribution relaying protection system, an area pilot protection system is proposed, the system configuration and operation principle are described. The area pilot protection system can determine fault section rapidly and reliably by collecting and comparing fault direction information of multi measurement points in the feeder. Fault direction,...
Islanding detection is a mandatory function for grid-connected converters. The popular slip mode frequency shift (SMS) and auto phase shift active islanding detection methods are investigated and an improved (IM)-SMS strategy is proposed in this study. In the proposed method, additional phase shift is introduced to help in stimulating the action of the islanding detection and the algorithm is simplified...
Selection of the DG interconnection protective relay is based on several criteria such as power system characteristics, the dynamic response of the generator, the system grounding, the DG transformer connection, etc., as well as the protection policy of the utility and coordination requirements. The interconnection protection IED design can be summarized as follows: disconnection of DG plants when...
The research progress in the fields of distributed generation (DG) and micro-grid (MG) are summarized in this paper, which mainly focuses on the schemes of DG islanding detection, DG's relay protection as well as the control strategy of converters. It is beneficial to realize the situation in these aspects and to know the improvements can be made in the future.
The following topics are dealt with: substation communication; power system protection; relays protection; power system measurement; power system faults; power converter; distributed generation; power grid; power system control; power distribution network; power swing; transmission system; power quality; local area network; wide area network; power plant; turbine; emission reduction; fuel cells; FACTS;...
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