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The integration of distributed generation transforms current distribution networks from vertically operated to horizontally operated. This transition leads to problems related to protection coordination. In the future, new protection philosophies should be applied which guarantee the increase of the during-fault distributed generation availability. The paper presents a protection scheme based on fault...
Recently, the advantages of using distributed generation have been analyzed in most of scientific discussions. Distributed generation rapidly changes the configuration of the electric industry from monopoly to competitive and will totally change the configuration of power systems in the 21st century. One of the main changes, that can be a disadvantage of distributed generation presence, is changing...
The integration of distributed generation transforms current distribution networks from vertically operated to horizontally operated. This transition leads to problems related to protection coordination. In the future, new protection philosophies should be applied which guarantee the increase of the during-fault distributed generation availability. The paper presents a cost-effective protection scheme...
Large number of 400 V distributed generators (DGs) connected to existing electric systems may have a great impact on their dynamic behaviour when external disturbances occur, such as a three-phase short circuit fault. This paper presents an investigation about the transient stability and the capacity of DG to withstand disturbances in the distribution network. Three proposed solutions to avoid the...
Using distributed generation (DG) is an interesting topic that has drawn attention of electrical engineers to itself in recent years. Presence of these generation units in distribution systems, although has many advantages and benefits, has to be applied after performing detailed studies and investigations due to their complexities in operation, control and protection of network. One of the most considerable...
Conventional electric distribution systems are radial in nature, and are supplied through a main source. These networks have a very simple protection system which is usually implemented using fuses, reclosers, and over-current relays. Recently, great attention has been paid to applying Distributed Generation (DG) throughout electric distribution systems. Presence of such generation units in a network,...
This paper describes an advanced coordination method for an optimized protection time grading based on a new nonstandard tripping characteristic for overcurrent protection relays. The intention is the highest possible reduction of tripping times for a selective fault clearing in distribution networks protected by overcurrent relays without communication links. The new nonstandard tripping characteristic...
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