Exact(1)
Validation is done through numerical simulations using the IEEE system 13 buses test feeder, a real distribution system from the RGE Sul Power Utility (Southern Brazil), and a real high impedance fault recorded from a digital relay.
Similar(59)
This method was applied for the measurement of fault resistances for 70 actual faults, recorded at different voltage levels (230 kV, 400 kV, and 765 kV).
In this paper, we verify how far electric disturbance signals can be compressed without compromising the analysis of encoded fault records.
The protection speed and security are evaluated via a very demanding test formed on the basis of several thousands of fault simulations, as well as on 60 fault records from 400 kV and 220 kV transmission networks.
Unlike previous works in digital fault records compression, the performance of the DSMP compression method is evaluated using a protocol based on fault analysis procedures commonly performed by expert engineers.
The behaviour of the system under near fault records from the L'Aquila 2009 earthquake is then considered, the conditions leading to the maximum demands are highlighted and the reasons behind them are clearly explained.
Of these, exactly half were near fault records (fault distance less than 20 km) and the remaining were far-fault records.
However, site records indicate that the fault transients contain an abundant amount of information about the fault location and the type of fault in the fault record.
Also shown is the mean spectrum of the 100 near fault and far fault records superimposed on the ASCE 7-05 despectrumctrum for the site.
The selected set of ground motions as the far fault records represent a very broad range of spectral amplitudes up to two orders of magnitude.
It removes much of the effort and risk of error associated with collating other forms of data such as triggered fault records (which may be accurately timestamped but have different start/end times).
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