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This paper investigates the settings of the generator out of step protection relays (ANSI device 78) for all six gas and steam turbine generators used in a grid connected CHP power plant. Detailed model of the CHP power system is developed in PSCAD/EMTDC tool which includes a representation of the synchronous generator, turbine governor, Automatic Voltage Regulator (AVR), Power System Stabilizer (PSS),...
Distributed generators (DG), while working in conjunction with the main electricity grid, must have antiislanding protection. This paper presents a local detection scheme for distributed generators by using an SCR based device to draw a current pulse around the zero- crossing of the voltage waveform and analyzing the pulse to determine whether islanding has occurred. This method is based on the fact...
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