PHIL Single Phase Voltage Source Interface

This section describes the PHIL Single Phase Voltage Source Interface component, one of a collection of PHIL components for specific system applications. The PHIL setup where this interface component is used is a high power single-phase voltage-source.

The PHIL Single Phase Voltage Source Interface is a PHIL interface component used to link the real time simulation with a real power amplifier, to form a PHIL system, by means of analog input/output signals. The PHIL Single Phase Voltage Source component's internal structure is shown in Figure 1. It is composed of an analog input controlled current source, voltage and current measurements, and a RMS calculation unit. As can be seen electrically within the simulated model, this interface component is represented by a current source. This current source is defined through the analog input of the real-time simulator. The analog signal must be provided by the power amplifier. The analog signal that is sent to the power amplifier is the Va_msr voltage. This voltage is the reference for the power amplifier, therefore the amplifier behaves as a voltage source.

Table 1. PHIL Single Phase Voltage Source Interface in the Schematic Editor core library
component component dialog window component parameters

PHIL Single Phase Voltage Source
  • Analog input
  • Dynamic gain and offset settings
  • Analog input offset
  • Analog input gain
  • Assign analog output
    • Channel
    • Scaling
    • Offset
  • Bandwidth enable
  • Bandwidth limit
  • Execution rate
  • Series resistance
Dynamic gain and offset settings are available only if the selected real-time simulation HIL device supports Time Varying Elements. When the dynamic gain and offset is enabled, related SCADA inputs are added. This is shown in Figure 1.
Figure 1. Schematic diagram of PHIL Single Phase Voltage Source Interface

The list of measurements available in the PHIL Single Phase Voltage Source Interface is shown in table below.

Internal analog measurements of the PHIL Single Phase Voltage Source Interface

Analog output variable name Description
(name).Ia_msr Instantaneous current.
(name).Va_msr Instantaneous voltage - usually used as a reference for the power amplifier.
(name).Ia_msr_RMS RMS current.
(name).Va_msr_RMS RMS voltage.
A typical use case of the PHIL Single Phase Voltage Source Interface is in a Battery Emulator PHIL system (Figure 2). A battery behaves as a voltage source. Battery is simulated by the real-time simulation. The voltage generated by the battery is measured and fed to the power amplifier's analog input through the real-time simulator’s analog output. Current measured by the power amplifier on its high power terminals is provided to the real-time simulation through analog input.
Figure 2. Battery Emulator example illustration