For doubly-fed induction generators that may include the use of wind power generators, voltage and frequency behaviors of the power system networks are likely to be significantly affected;
For motor operated valves (MOVs), which are commonly used in nuclear power plant auxiliaries' operation, as well as other industrial installations, two modes of operation may be provided. For opening and closing operating modes, wherein each mode includes: (a) start; (b) full speed; (c) unseating; (d) travel; and (e) stall, a user-defined model type for each mode may be provided. For example, the “start” stage may be modeled as a constant current, while the “full speed” stage may be modeled by constant power. The modeling for the opening mode may be the same as modeling for the closing mode;
For Automatic Voltage Regulator (AVR) and excitation systems, there may be a number of models ranging from rotating, i.e., DC and AC, and analogue to static and digital controls. In addition, a system may offer user-defined modeling capability that can be used to define a new excitation model;
For governors and turbines, a system may be designed to address current and future technologies including, but not limited to, hydraulic, diesel, gasoline, and combined cycle with mechanical and/or digital governors;
For relays, a system may be designed to address current and future technologies including under frequency, under voltage, over current, and impedance types;
For Static Var Compensators (SVCs), a system may be designed to address current and future technologies including a number of solid-state (thyristor) controlled SVCs or even the saturable reactor type SVCs;