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A directional comparison bus protection can provide a high-speed bus fault clearing in an IEC61850 process-bus environment. This technique is based on fault direction for each circuit connected to the protected bus. Compared to biased current differential protection, the loss of accurate time synchronisation of the individual merging units does not cause the bus protection based on directional comparison...
This paper presents a new integrated protection relay and its associated scheme for distributed generation systems. In the scheme, an integrated relay is responsible for the protection of both line sections associated with the substation bus. Based on conventional directional overcurrent protection technique, the basic principle of the new relay is to determine whether a fault is on the protected...
This paper first outlines an advanced integrated protection scheme based on the latest developments in protection and communication technologies. The paper then gives a description of the communication networks and systems in substations based on the IEC61850 standard. The paper emphasizes the construction of the information model and the analysis of communication capacity of IEC61850 for the integrated...
This paper presents an integrated accelerated protection scheme for distribution systems based on the conventional directional overcurrent (OC) protection. An integrated relay in a distribution substation, connected to both the incoming and outgoing lines associated with the station busbar, is responsible for the protection both line sections. The increase in the operating speed is achieved by identifying...
This paper presents a new practical accelerated overcurrent protection scheme for single circuit breaker radial distribution feeder and the implementation of this new scheme into latest numerical relay. Extensive tests have been conducted using the real time digital simulator (RTDS) with respect to a typical single circuit breaker multi-section system. The results prove that the new protection relay...
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