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Distributed Generation
Distributed Generation (DG) has an essential role to play in reducing emissions and improving security of supply because it can use relatively small, localised, sources of fuel (often renewable) to generate electricity, with or without heat. How much DG can be tolerated on each voltage level of a network and concerns about stability and intermittency are among the issues discussed in this stream. |
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Distributed Generation Impact on Voltage Sags in Distribution Networks
Submitted by Hans De Keulenaer on Mon, 2008-02-11 18:54.
By J A Martinez-Velasco et al
Characteristics of voltage sags caused by faults in distribution networks depend on the design of the protection system and the coordination between the different protective devices. The presence of distributed generation (DG) changes the radial nature of distribution systems, so it can affect the performance of the protection system, and consequently the characteristics of voltage sags. In addition, DG will help to maintain the during-fault voltages of healthy phases. This paper explores the impact that DG can have on voltage sags characteristics by means of a small test distribution network and presents a simple method to compare and rank the performance of protection systems.
