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6.1 Active Power Control
6.1.1 Power Limit
According to BDEW technical guideline in page 25 of June 2008 version as
below:
It must be possible to operate the generating facility at reduced power output. In
the cases listed below, the network operator is entitled to require a temporary
limitation of the power feed-in or disconnect the facility:
- potential danger to secure system operation,
- congestion or risk of overload on the network operator’s network,
- risk of islanding,
- risk to the steady-state or dynamic network stability,
- rise in frequency endangering the system stability,
- repairs or implementation of construction measures,
- within the scope of generation management/ feed-in management/ network
security
- management (see „Grundzüge zum Erzeugungsmanagement“)
User can reduce inverter output power by set percentage of actual or rated power.
Please refer to 7.2.6.4.1 Power Limit for the settings procedure.
6.1.2 Power vs. Frequency
There’re 2 different operation curves depends on Country setting.
Country = Germany LV, follow the curve in Figure 6-1-a
Country = Germany MV, Italy BT or Italy MT, follow the curve in Figure 6-1-b
Where:
P
m
is the power generated at the time of exceeding f
start
P is the feeding power
f is the mains frequency
fstart is the freuqncy which starting power reduction
fstop is the frequency which has zero power
Gradient is the slop of power reduction
User can set all necessary settings to meet the requirements from network
operator. Please refer to 7.2.6.4.2 Power vs. Frequency for the settings
procedure.
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