Version 2.04
| Optidrive ODP-2 Solar Pump User Guide |
35
www.invertekdrives.com
It is also beneficial to set up the drive to accelerate up to minimum speed quickly with the MPPT disabled so that submersible pumps
with thrust bearings will not become damaged during slow starts. This method of starting can also help to force the drive into the low
power standby detailed in section
6.2.4. Standby / Wake-up parameter settings
below, when there is insufficient power available
from the array to actually start the pump.
Par.
Description
Default
Typical
P6-05
MPPT Enable Mode
0
1
This parameter enables the MPPT as shown below:
0: Enabled when supplied by DC (disabled if the drive is supplied by AC)
1: Enabled when supplied by DC AND when the motor is running above minimum speed (P1-02)
2: Disabled
Using a value of 1 here and setting the 2nd acceleration ramps help minimise slow running when the power available from the array is
very low.
P1-02
Minimum Speed
20Hz
xxHz
Set this to the minimum speed that the pump needs to operate at and accelerate up to quickly. Note that a setting too high here could
cause the array voltage to collapse based on a quick acceleration ramp.
The 2nd acceleration ramp will only work up to the speed set in this parameter which means that it must be set > 0.
P2-09
Skip Frequency Centre-Point
20Hz
P1-02
Set this to the same value as P1-02
P2-10
Skip Frequency Bandwidth
0Hz
0Hz
Set this to zero to enable the 2nd acceleration ramp
P2-25
Fast Ramp Deceleration Time (2nd Acceleration Ramp)
0.1s
4s
This is the 2nd acceleration ramp rate that will be used up to the minimum speed set in P1-02. This is the time that it would take to go
from 0Hz up to motor rated frequency.
6.2.4. Standby / Wake-up parameter settings
The P2 Solar Pump drive has two main standby methods that can be used together but operate independently of each other. There is
a Low Power Standby mode that is designed to force the drive into a standby mode if the power from the array is not sufficient for the
pump to start up. This mode forces the drive into the Low Power Standby (Lo-P) if the PV array voltage falls below the value set in P8-
18 (MPPT Controller Minimum Voltage), the drive will then sit in this mode for the duration set in P8-13 (Low Power Restart Delay).
Par.
Description
Default
Typical
P8-18
MPPT Controller Minimum Voltage
280 / 560V
xxxV
This parameter defines the voltage from the array at which the drive will enter the Low Power Standby mode.
P8-13
Low Power Standby Restart delay
0s
300s
This is the delay applied to the drive before it can re-start after it enters the Low Power Standby mode.
The 2nd standby mode is controlled by the setting of P8-14 and is detailed below:
Par.
Description
Default
Typical
P8-14
Standby Mode
0
3
This parameter selects the variables that causes the drive to go into standby (sleep) mode. By default, this parameter is set to 0 which
means that standby mode is selected based on pump speed. A setting of 3 however, configures the drive to go into standby mode
and ‘wake-up’ from this condition based on the voltage of the DC Bus.
If a solar irradiation sensor is used then this setting should be changed to 2.
If the drive is to be operated in PI mode to pressure regulate using a pressure transducer, this mode should be set to 0. Please see
6.2.6. Additional settings for pressure regulation (PID)
below for further information.
P8-15
Standby Activation Level
0.0%
45.0%
With P8-14 = 1, this parameter should be set in DC Bus Voltage as a % of 1000V, below which the inverter will decelerate the pump
speed and remain in Standby mode waiting for the DC bus to exceed the wake-up level. 45.0% = 450Vdc.
P2-27
Standby Activation Delay Time
0s
5s
This parameter sets the delay time in seconds that the DC Bus Voltage must remain below the activation level set in P8-15, in order for
the drive to go into standby (sleep) mode.
P8-16
Standby Wake-Up Level
0.0%
53.0%
This parameter sets the DC Bus Voltage in % 1000V, above which the inverter will wake-up form standby (sleep) mode, start to run and
increase the speed of the pump.
53.0% = 530Vdc
P8-17
Standby Wake-Up Delay Time
0.0s
30.0s
This parameter sets the delay time in seconds, which the standby wake-up condition must be present for before the drive will begin the
wake-up sequence and exit standby (sleep) mode.
6
Quick Star
t Pr
ocedure
