Control and Design of Microgrid Components - Power Systems ...

Table 7.1 Summary of Experiments for Each Group of Tests.
Import
Power From
the Grid
Export
Power From
the Grid
Unit 1 Unit 2 (*) NOT there if both unit control unit output power, P
50% 50% Islanding
10% 90% Wrong Setpoint at One of the Units Controlling F (*)
10% 90% Islanding, to Operating Point (i)
10% 90% From Island, (i), Remove a Load
10% 90% From Island, (i), Reduce Setpoint of Unit at Maximum Power
90% 10% Wrong Setpoint at One of the Units Controlling F (*)
90% 10% Islanding
50% 50% Islanding
10% 90% Islanding
90% 10% Islanding, to Operating Point (e)
90% 10% From Island, (e), Insert a Load
90% 10% From Island, (e), Increase Setpoint of Unit at Zero Power
7.1 Choice of Setpoints for the Series Configuration
There are four possible control choices in the series configuration:
i) unit 1 controlling P, unit 2 controlling P
ii) unit 1 controlling F, unit 2 controlling F
iii) unit 1 controlling F, unit 2 controlling P
iv) unit 1 controlling P, unit 2 controlling F
For each choice (see Table 7.1), there is an experiment when unit 1 is at 10% of its output power,
while unit 2 is at 90% of its output power and the system transfers to island. Figure 7.2 shows the
series configuration with all the loads, highlighting the fact that the only event taking place is the
transition to island. The system is importing from the grid.
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