Power System Component Library

The Power System Component Library is included as an integral part of RSCAD and contains all the fundamental elements of an electrical power system. Each component model has been tested to ensure the accuracy and stability for long term real time simulation. Numerous features have been added to the components based on experience and customer feedback, refining their operation and increasing flexibility.

RTDS Technologies' simulation experts are continually expanding the component library based on customer requirements and in-house research. Models are developed to expand the application and the efficiency of the simulator. RTDS Technologies continues to work hard to accommodate more components on less hardware. Through this effort, we intend to help our clients make the most of their investment. However, if a component model is not available in the standard component libraries, the user can create them using ComponentBuilder.

Power System Component Library - Component Types

The descriptions below are by no means an exhaustive list of the available components, but provide an overview of the base components.

• Real Time Network Solution - solves nodal equations for simulation circuits including passive elements, breakers and faults. The network solution performs real time decomposition of the admittance matrix which allows continually varying conductance elements to be represented in the circuit. The current dimensioning of the network solution allows 66 single phase nodes per rack (ie per subsystem) and 56 switches.
• Sources - both voltage and current sources are available. Voltage sources provide several impedance options to act as network equivalent models and allow the positive and zero sequence impedance to be specified independently.
• Transmission Lines and Cables - traveling wave (Bergeron) and PI section components can represent full coupling between as many as 12 conductors. Frequency dependent model or phase domain components allow a maximum of 6 conductors.
• Machines - synchronous and induction machines, multi-mass model (maximum 7 masses). Optionally the synchronous machine model can also represent the unit transformer and the generator terminal bus, therefore reducing the load on the network solution and freeing up more nodes.
• HVDC - converter models for point-to-point and back-to-back schemes. The converter models can be easily configured to represent UHVDC (ie with several series groups) and allow faults to points both internal and external to the converter. The improved firing algorithm is used to allow the converters to represent a continually variable firing instant with an accuracy of 1µs.
• SVC - including TCR (with improved firing) and TSC.
• Switched Filter - provides as many as 12 individually switched filters without requiring the use of any additional nodes. The entire component is embedded in the main network solution as variable conductance elements. Various filter configurations including single, double and triple tumed options are available.
• FACTS - voltage source converter (VSC) based devices such as STATCOM, SSSC, UPFC, VSC based HVDC, etc. are represented using small timestep VSC subnetworks.
• Series Compensation - either fixed or variable (TCSC) compensation components are avalable with MOV, bypass breaker, spark gap, capacitor bank unbalance, etc.
• Transformers - 2 and 3 winding transformers with on-load tap changers, saturation and hysteresis, internal faults.
• Instrument Transformers - CT, CVT with ferroresonance damping cct., and PT all with saturation and hysteresis representation.
• Distributed Generation - wind turbines, photo voltaic, fuel cell and various other power sources can be represented by library components while the corresponding VSC converters can be freely configured in small timestep subnetworks.