Dağıtık üretimde güneş enerjisi uygulamalarının kısa devre koruması üzerindeki etkileri ve dağıtık üretimde kısa devre koruması için yeni teknikler

Abstract

The simplified topology  The computing platform  Improved protection The summary of the contents is given in the following flow-diagram. Figure A. Flow-diagram of the conclusion Purpose: The wide application of distributed generation (especially solar energy power plants, SPP) is investigated and the possible effects on the existing relay coordination are predicted. New applications are proposed that will help to reduce the adverse effects that are predicted/identified during all these simulations and investigation studies. Theory and Methods: The superposition analysis was applied for the first time in distributed generation short-circuit analysis. It serves practical and easy ways to examine the effects of distributed generation on the distribution network. IEEE 13-Node or IEEE 34-Node radial distribution test feeder topologies have been frequently used when the distribution network is examined. However, instead of using these topologies, an alternative topology which is sufficient and more useful for the required PSCAD simulation has been developed for the sake of simplicity. In order to obtain realistic results in PSCAD simulations, an Excelbased computing platform (Master Program) was developed that calculates the distribution network circuit parameters to be used in PSCAD. Results: The generation feeder and the main busbar are adversely affected in terms of relay coordination. However the load feeder is not affected. In the troubled points of the topology:  The short-circuit contribution of SPP should be bounded,  The adaptive features of the relays should be strengthened. Conclusion: Distributed generation will take place in the future of the electricity grid. Current relay coordination will not be enough to protect the network. The network protection philosophy needs to be changed.