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This paper focuses on development of negative sequence relay model that is processing IEC 61850-9-2 Sampled Values. The detection of negative sequence current and fast, reliable operation of protection relay is useful for power system components. This paper describes negative sequence relay model programmed in LabView that was tested with software tools developed at Brno University of Technology....
Sampled Values transferred via process bus according to IEC 61850 are used for protection functions in substation. Nowadays a lot of researchers are dealing with their processing and using them for protection algorithms. There are some software tools that could be used for their processing. This paper is focused on package of software tools developed at Brno University of Technology and they allow...
IEC 61850 standard has achieved the required development for the communication in the Substation Automation Systems (SASs) by allowing to apply the high-speed peer-to-peer communications that is the basis of metering, control and protection applications in SASs. Nevertheless, an appropriate test method for performance testing of IEC 61850 compatible with protection relays and systems is an urgent...
This paper deals with the description and of the mathematical model of compensated MV distribution network. The model was created in PS Cad in order to solve the ground faults localization using the method of the additional grounding of the healthy phase. This method was experimentally tested for different types of ground faults. The comparison of the measured values and the simulation results is...
This paper focuses on the application of simplified model for the calculation of the pressure rise in medium voltage switchgear due to internal arc fault. It describes how it can be used for development of the metal switchgear enclosure, for comparison of various types of gas ducts and evaluation of pressure rise in switchroom during internal arc fault.
This document deals with usage of sampled values for protection functions in medium voltage networks. IEC 61850-9-2 brings solution to distribution of current and voltage values measured by sensors. Sampled values could be used for various protection functions. One of the most extensively used type of protection is overcurrent protection relay. If settings of parameters are set wrong in overcurrent...
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