Generator power plant protection system and method

A power plant comprising

• a plurality of generators;
• at least one load;
• at least one bus interconnecting said generators with said at least one load;
• said plant being operated on an uncorrected droop configuration for speed control and voltage control;
• wherein at least one of said loads is further provided with a monitoring apparatus, said monitoring apparatus being operatively connected with said at least one load and operatively connected to said at least one bus, said monitoring apparatus monitoring frequency and voltage on said at least one bus and comparing said monitored frequency and voltage with predetermined levels expected from normal droop operation, and for modifying a contribution of said load to said plant as monitored frequency or voltage or a combination thereof approach boundary conditions for either of frequency and voltage.

A method for controlling the operation of a power plant comprising a plurality of generators;

• at least one load;
• at least one bus interconnecting said generators with said at least one load;
• wherein said method comprises the steps of:
• operating said plant in an uncorrected droop configuration for speed control and voltage control;
• monitoring at least one of a plurality of signals;
• calculating a fault based on a comparison of predefined values expected from normal droop operation with respect to monitored values obtained from said monitored signals;
• and
• providing an order to bring additional generating capacity on line, for tripping a generator if a fault has been identified with respect to a single generator or for tripping a tie breaker to provide bus to bus isolation if an identified fault cannot be isolated to a single generator.