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User Manual V1.0-2022-08-20
11 Appendix
11 Appendix
11.1 Precision of inverter parameters
For parameter, which used in grid support and protection function, adjustable requirement of
CA Rule 21, HECO 14H and IEEE1547, the relevant explanations and setting methods can obtain
by reading, <Parameter Adjustable Method Of Grid Support Utility Interactive Inverter>, the
document can be obtained by contacting the after-sales.
Time frame
Steady-state measurements
Transient measurements
Parameter
Minimum
measurement
accuracy
Measurement
window
Range
Minimum
measurement
accuracy
Measurement
window
Range
Voltage, RMS
(± 1% V
nom
)
10 cycles
0.5 p.u. to
1.2 p.u.
(± 2% V
nom
)
5 cycles
0.5 p.u. to 1.2
p.u.
Frequency
b
10 mHz
60 cycles
50 Hz to
66 Hz
100 mHz
5 cycles
50 Hz to 66 Hz
Active Power
(± 5% S
rated
)
10 cycles
0.2 p.u. < P <
1.0 p.u.
Not required
N/A
N/A
Reactive
Power
(± 5% S
rated
)
10 cycles
0.2 p.u. < Q <
1.0 p.u.
Not required
N/A
N/A
Time
1% of measured
duration
N/A
5s to 600s
2 cycles
N/A
100 ms < 5 s
