Abstract
The smart grid is the vision of the electric power network which integrates the electrotechnical, communication and informatics technologies. This integration allows developing new fault location technologies which are based on methods of fast transients analysis. The usage of these methods allows to locate the fault faster and more reliably or to prevent possible faults. The topic explains the structure of the fault location system for the smart electric power distribution network, discusses the challenges of smart grid fault location system and describes the method for one phase to ground fault location which is based on fast transient analysis. Ill. 2, bibl. 13 (in English; abstracts in English and Lithuanian).http://dx.doi.org/10.5755/j01.eee.112.6.461
Highlights
Smart Grid is the electric power network which is more reliable, more secure, more economic, environmentally friendly and safer
In case of the fault in the smart grid the fully automated control system in the minimum possible time should carry out the actions to recognize the fault type, to find its location, change the network configuration so that the minimum number of the higher reliability group consumers does not remain connected to the network and electrical network maintenance staff obtains the information about the fault type, location and scale
The analysis algorithms of the fast electromagnetic transients are a good basis for the development of the diagnostic, fault location and isolation technologies which can be integrated into the structure of the smart grid control system
Summary
Smart Grid is the electric power network which is more reliable, more secure, more economic, environmentally friendly and safer. In case of the fault in the smart grid the fully automated control system in the minimum possible time should carry out the actions to recognize the fault type, to find its location, change the network configuration so that the minimum number of the higher reliability group consumers does not remain connected to the network and electrical network maintenance staff obtains the information about the fault type, location and scale For this purpose, the fault recognition and isolation system can be used. The fault recognition and isolation system can be used It has the following structure: Fast registration of the processes and indexes (faulted line, fault place, stationary and transient processes of voltages and currents); Transmit the registered data to the control terminal; Control terminal, which has permanent communication link with dispatching center, stores the registered data, performs analysis of the situation and selects the optimal post fault configuration of the electricity distribution network; Control terminal independently or after permission of the dispatching center performs necessary control actions or network switching. The system continually traces the state of the network and its elements and periodically performs the analysis of the reliability indexes of the electric power network
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