Appendix; Precision Of Inverter Parameters - Goodwe MS Series User Manual

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
Minimum
Parameter measurement
accuracy
Voltage, RMS (± 1% V
Frequency 10 mHz
b
Active Power (± 5% S
Reactive
(± 5% S
Power
1% of measured
Time
duration
Steady-state measurements
Measurement
window
) 10 cycles
nom
60 cycles
) 10 cycles
rated
) 10 cycles
rated
N/A
Minimum
Range measurement
accuracy
0.5 p.u. to
(± 2% V
nom
1.2 p.u.
50 Hz to
100 mHz
66 Hz
0.2 p.u. < P <
Not required
1.0 p.u.
0.2 p.u. < Q <
Not required
1.0 p.u.
5s to 600s 2 cycles
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Transient measurements
Measurement
window
) 5 cycles
5 cycles 50 Hz to 66 Hz
N/A
N/A
N/A
Range
0.5 p.u. to 1.2
p.u.
N/A
N/A
100 ms < 5 s