InteliMains 210 Global Guide
101
Voltage, PF, VAr sharing have one common output = Voltage request. The value of this output is always
composed from the contribution of each of the regulation loop.
Note: All regulation loops are PID, but only PI components are visible as setpoints.
Adjustment of regulation loops
The regulation loops have two adjustable factors: P-factor and I-factor (except angle regulation loop, which has
P-factor only). The P-factor (gain) influences the stability and overshoot of the regulation loop and the I-factor
(int) influences the steady-state error as well as the settling time. See the picture below for typical responses of
a PI regulation loop.
Image 5.29 Typical responses of PI regulator
For manual tuning of a control loop use following method:
Set both the I-factor and P-factor to 0.
Increase the P-factor slightly until the system starts to oscillate.
Adjust the P-factor back to approx. one half of the value where the oscillations started.
Increase the I-factor slightly to achieve optimal resulting response.
IMPORTANT: Be ready to press emergency stop button in case the regulation loop would start to
behave unacceptable while it is being adjusted.
5.4.7 Frequency control
The frequency control output is used to control the frequency of the engines presented on the bus. The
frequency regulation, load regulation and load sharing are realized through the Loadsharing Output. The
frequency request is internal value of the regulator. This value is transformed to range 0...100% of the
Loadsharing Output which comes out of the controller via communication line. Gen-set controller accept this
value and transform this to his speed control output.
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