PSERC
Seminar, June 7, 2005 (©2005 Paolo Piagi)
PP - 14
PSERC
Final Control
Concepts
Control
regulates voltage magnitude and power
Power vs
frequency droop to redispatch during island
Fixed slope
and active power limits
Reactive
power droop to limit reactive current injection
Voltage
setpoints can be independently chosen
Units can
be installed in parallelwo
Inverter Current
Inverter or Line Current
Magnitude Calculation
Voltage
Control
Q
Calculation
Q versus E
Droop
P
Calculation
P versus Frequency
Load Voltage
Measure
Q
P
Po
Eo
dv
Ereq
Gate Pulse
Generator
to Inverter
Gates
E
V
Low-Pass
Filter
Low-Pass
Filter
Low-Pass
Filter