SMA SHP 75-10, Техническая информация

Страница: 15 / 22

5 Settings of Grid Management Services SMA Solar Technology AG
Technical Information 15 STP60-SHP75-10-Parameter-TI-en-12
5.1.6 Nominal Voltage
This parameter refers to the nominal grid voltage at the point of common coupling. The parameter is used to scale the
grid voltage for the control modes where the grid voltage is the independent variable, i.e. for Q(U), PF(U) and P(U). If
no external energy meter is used, this parameter should have the same value as
UNOM in the protection part of the
grid code file. This also applies if an external energy meter is switched on the low-voltage (LV) side of the transformer.
If an external power meter is connected to the medium-voltage (MV) side of the transformer, the corresponding
nominal values for the grid voltage must be set, e.g. 33 kV.
Parameter name Setting option
UNOM_LL 200 V to 480 V (default: 398 V) for low-voltage grids
and 3300 V to 33000 V for medium-voltage grids
5.2 Direct Control
5.2.1 Start Signal
The PV system can be disconnected immediately from the grid or it can be set that it connects to the grid once the grid
parameters (voltage level and frequency) are within the permissible range for connection (see Section 2 "Grid
Protection Settings", page 4).
Parameter name Setting option Explanation
ReleaseToStart 0 Immediate disconnection
1 Connection when grid parameter is in the permissible range (default)
5.2.2 Connection/Reconnection Ramp Rate
The active power is ramped according to this setting whenever the inverter is connected / reconnected to the grid, i.e.
when starting up in the morning, when starting up after the parameter
ReleaseToStart is set to 1 and after
disconnection due to overvoltage or undervoltage, overfrequency or underfrequency etc.
Parameter name Setting range Step size
RmpIncTmm_ONLINE 0.6%/min to 1200%/min (default:
10%/min) 0.1%
5.2.3 Time Delay Until Disconnection
Controlled disconnection over the defined time period, this means the power will be ramped down in a controlled
manner over the delay period.
Parameter name Setting range Step size
T_DELAY_SHUTDOWN 0 s to 600 s (default: 2 s) 0.2 s
5.2.4 Reactive Power Ramp Rates
The reactive power is ramped according to this setting whenever the setpoint for reactive power is changed (both for
external setpoints and for other control modes, e.g. Q(U) or PF(P)). Note that two parameters are available: one for
decreasing and one for increasing setpoints.
Parameter name Setting range Step size
RmpDecTmm_Q -0.6%/min to -1200 %/min (default) 0.1%
RmpIncTmm_Q 0.6 %/min to 1200 %/min (default) 0.1%