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Protection security assessment of power grids is getting an important task in the course of a decarbonized power generation and a competitive energy business. The analysis of past blackouts studied by the North American Electric Reliability Council (NERC) shows that protection relays are involved in about 75% of all major disturbances. Protection security assessment can be investigated under two different...
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),...
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