65
User Manual
MHS-3~8K
series
7.6.5 “Q(U)” Mode
The reactive power output of the inverter will vary in response to the grid voltage.
“Q(U)” Mode Parameter Descriptions:
Parameter
Explanation
Range
Hysteresis Ratio
Voltage hysteresis ratio on the Q(U) mode curve
0 ~ 5%
QU_V1
Grid voltage limit at P1 on the Q(U) mode curve
80% ~ 100%
QU_Q1
Value of Q/Sn at P1 on the Q (U) mode curve
-60% ~ 0
QU_V2
Grid voltage limit at P2 on the Q(U) mode curve
80% ~ 110%
QU_Q2
Value of Q/Sn at P2 on the Q (U) mode curve
-60% ~ 60%
QU_V3
Grid voltage limit at P3 on the Q(U) mode curve
100% ~120%
QU_Q3
Value of Q/Sn at P3 on the Q (U) mode curve
-60% ~ 60%
QU_V4
Grid voltage limit at P4 on the Q(U) mode curve
100% ~120%
QU_Q4
Value of Q/Sn at P4 on the Q(U) mode curve
0 ~ 60%
QU_Enter-Power
Active power for Q(U) function activation
20% ~ 100%
QU_Exit-Power
Active power for Q(U) function deactivation
1% ~ 20%
QU_Enable-Mode
Unconditional activation/deactivation of Q(U) function
Yes/No/Yes, Limited by PF
Figure 7-3 Q(U) Curve
GRID
v
oltage
Q/Sn
Upper
Lowe
r
P1
P2
P4
P3
Hyster
esis
Hyster
esis
QU_V1
QU_V2
QU_V3
QU_V4
Q/Sn Ind
Q/Sn Cap
