Understanding the Panel

When starting the demo, the panel in figure 3 appears first with the default settings.

Figure 3: Start-Up Panel of the Battery Energy Storage System Laboratory

The panel is to be operated as follows:

• In the top left corner, under Operation Modes, the student can select (via the switch button) to operate the BESS either as islanded or grid connected mode.
• Also, under Operation Modes, the student can set the bus of the BESS as “PV” or “PQ” mode.
  In “PV” mode, the active power (P) and the voltage are controlled, while in “PQ” mode, both active and reactive power are controlled.
• In the middle left corner, under Setpoints, the student can change the control parameters, which are summarized in table 1.

Table 1: Control Parameters of the BESS

After setting the control parameters, the students can observe the waveforms displayed in six scopes.
More details about the displayed waveforms are given in table 2.

For identification purposes, the three scopes under Battery Measurements are denoted Scope₁, Scope₂, and Scope₃.
For the scopes under System Measurements, the indices will be like those of matrix elements.
The scope in the bottom right corner, under System Measurements, is denoted as Scope₂₂.
By the same token, the other three scopes under System Measurements are denoted Scope₁₁, Scope₁₂, and Scope₂₁.

Table 2: Content of Scopes and Displayed Waveforms

Figure 4: Components of the Battery Energy Storage System

Help Tab

When clicking on the “Help Contents” tab, the panel in figure 5 is displayed.
In this panel, the student can see live displays of RMS currents and voltages, and power flow at different parts of the BESS.
The student can validate the simulation results by checking that the power flow is balanced.
Additionally, the base power and voltage values for p.u. computation are given in the “Help Contents” tab.

Figure 5: Help Contents Panel of the Battery Energy Storage System Laboratory