7. Normal operation
7. Normal operation
Canadian Solar US version inverters have Ten working modes:
1. NULL
2. Volt-watt
3. Volt-Var
4. Fixed-PF
5. Reac-power
6. Power-PF
7. VgWatt-UL
7.5.8.1.2 With Rule21 Standard selected
NOTE
The other three working mode"P1-V-Watt","P1-V-Var" and
"P1-V-P&V-Q" are NOT applicable for settings.
Based on Rule21, working mode 1,2,3,4 can be used by grid operator.
1.NULL (Mode Reset)
Description: Inverter is not under any working mode.
2. Volt-Watt
Description: Inverter will change the active output power based on voltage change.
Note: This is the Volt-Watt Setting for Rule21 Standards.
Figure 7.30 Volt
-
Watt
characteristic
No Real Power
Production Zone
0%
106%
108%
110%
Real Power
Reduction Zone
Full Power Production
Capabilities Zone
50%
100%
Active Power
as % of
Nameplate
% Voltage
3. Volt-Var
Description: Inverter will change the reactive output power based on voltage change.
Q1
,
cap
Q2
=
Q3
=
0
Q4
,
ind
V1
V2
Vnom
V3
V4
Figure 7.31
Volt
-
VAR curve for Q
(
V
)
Default Settings for Rule21 Standards:
Rated 600V Grid
V1:less than Vstart
V2 (Vstart): (599-719V) Default 636V
V3 (Vstop): (660-779V) Default 660V
V4: larger than Vstop
P1:100% P2:100% P3: 0% P4:0%
Rated 800V Grid
V1:(640-800V) Default 736V V2: (800-960V) Default 848V
V3:(800-960V) Default 880V V4: (800-960V) Default 920V
P1:100% P2:100% P3: 0% P4:0%
Default Settings for Rule21 Standard:
Q1: (0-60%) D30% Q4: (-60%-0%) Default -30%
Rated 600V Grid
V1:(478-600V) Default 551V V2: (478-600V) Default 580V
V3:(600-719V) Default 618V V4: (600-719V) Default 640V
Figure 7.32 Volt-VAR (600V for 185K)
Voltage1
:
0551V
Voltage2
:
0580V
.47.
.46.
