Lessons Learned

87L Application on Long Transmission Line with Series Capacitor Banks and Shunt Reactors

Impacts of series capacitor banks and shunt reactors on power systems are first reviewed. In order to demonstrate challenges for the 87L relay application, a long transmission line application is presented, where two series capacitor banks and two shunt reactor banks are installed. The analysis focuses on voltage inversion, current inversion, MOV conducting, reactors included in or excluded from 87L protection zone, charging current compensation, configuration scheme, and arrangement of the 87L communication channels. More

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