Solare-datensysteme Solar-Log Instrukcja Użytkownika Pobierz pdf (Strona 144)

144

Special functions

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SAVE settings.

The characteristic curve displayed changes according to the values entered.

4-point characteristic curve

By selecting "4-point characteristic curve" it is possible to define a characteristic curve using four points.

Procedure:

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Select variable reactive power via the characteristic curve Q(U) as the type.

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Activate the interfaces.

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Select 4-point characteristic curve.

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Define the characteristic curve points A, B, C and D based on the boxes U/Uc, Q/SAmax and put a

check in front of inductive/under-excited.

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SAVE settings.

The characteristic curve displayed changes according to the values entered.

Reductions

The following configuration options are available in the Reductions section.

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Gradient limit (adjustment rate):

If the power company requires a reduction, it has to be configured in this box. (Enter the values in

seconds)

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Max.cos(phi)inductive/underexcitedandmax.cos(phi)capacitive/over-excited:

A maximum shift factor can be defined wit this the reduction. With this, it can be that less reactive

power is fed-in into the grid than what the characteristic curve allows in the partial load range in

order to maintain the shift factor limits.

Note

Entering zero as the value deactivates the particular limit.

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Solare-datensysteme Solar-Log Instrukcja Użytkownika Strona 144