ISA 77.20.01 : 2012

1 Scope
2 Purpose
3 Definitions
4 General elements of a simulator
5 General requirements
6 Performance criteria
7 Simulator testing
8 Design control
9 Documentation
Annex A - Three types of simulators
Annex B - General modeling requirements
Annex C - General data requirements
Annex D - Specific documentation for three types of
          simulators
Annex E - Simulation versus stimulation
Annex F - Related Standards

ANSI/ISA-77.20.01-2012, Fossil-Fuel Power Plant – Simulators: Functional Requirements, establishes functional requirements for fossil-fuel power plant simulators used primarily for operator training. It defines the simulator's scope, capabilities and performance criteria, emphasizing high-fidelity modeling of boilers, turbines and balance-of-plant systems with real-time simulation of normal operations, malfunctions and transient conditions.This standard outlines general elements such as trainee environments, simulation computers, instructor stations and software requirements, including design control and documentation standards. It categorizes simulators into full-scope, reduced-scope and generic types, detailing their features, advantages and disadvantages. Additionally, it covers modeling techniques based on first principles, data needs for accurate simulation, testing protocols and differences between simulation and stimulation methods.