Recommended grid-support settings

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This instruction guides how to set the grid-support functions required by

HECO Rule 14H
CPUC Rule 21
IEEE 1547

This document covers the following models

PWS1-50K-NA
PWS1-100K-NA
PWS1-150K-NA
PWS1-250K-NA
PWS1-500KTL-NA

Parameter on HMI (legacy name before M1330)	Meaning	HECO requirement	CA rule 21 requirement	IEEE1547 requirement
Setting → AC → Page 2 → Anti-islanding	to dis-/enable Anti-islanding	Enabled	Enabled	Enabled

Parameter on HMI (legacy name before M1330)	Meaning	HECO requirement	CA rule 21 requirement	IEEE1547 requirement
Setting → AC → Page 2 → FVRT enable	to dis-/enable frequency and voltage ride-through	Enabled	Enabled	Enabled
Setting → AC → Page 2 → FVRT current limit	to dis-/enable current limiting in ride-through	Disabled	Enabled	Unknown

Parameter on HMI (legacy name before M1330)	Meaning	HECO requirement
Setting → AC → Page 6 → OFR2 voltage	Over-frequency region 2 boundary, bias of nominal frequency	5 (+60Hz) for Molokai, Lanai 4 (+60Hz) for Oahu, Maui, Hawaii
Setting → AC → Page 6 → OFR1 voltage	Over-frequency region 1 boundary, bias of nominal frequency	3 (+60Hz)
Setting → AC → Page 6 → OFR2 time	Over-frequency region # trip time, -0.5~-1s later than ride-through until	OFR1 time: 20 s, making ride-through 19.98 s OFR2 time: 0.1s, no ride through
Setting → AC → Page 6 → OFR2 time	Over-frequency region # trip time, -0.5~-1s later than ride-through until	OFR1 time: 20 s, making ride-through 19.98 s OFR2 time: 0.1s, no ride through
Setting → AC → Page 6 → UFR# voltage	Under-frequency region # boundary, bias of nominal frequency	OFR1 frequency: -3 (+60Hz) OFR2 frequency: -10 (+60Hz) for Molokai, Lanai -4 (+60Hz) for Oahu, Maui, Hawaii
Setting → AC → Page 6 → UFR1 time	Under-frequency region 1 trip time, -0.5~-1s later than ride-through until	UFR1 time: 20 s, making ride-through 19.98 s
Setting → AC → Page 6 → UFR2 time	Under-frequency region 2 trip time, -0.5~-1s later than ride-through until	UFR2 time: 0.1s, no ride through
Setting → AC → Page 6 → Restore upper limit freq	Grid reconnect threshold frequency-upper limit, bias of nominal frequency	0.1 (+60Hz)
Setting → AC → Page 6 → Restore lower limit freq	Grid reconnect threshold frequency-lower limit, bias of nominal frequency	-0.1 (+60Hz)

Parameter on HMI (legacy name before M1330)	Meaning	HECO requirement
Setting → AC → Page 5 → OVR# voltage	Over-voltage region # boundary, ratio of nominal voltage	OVR1 voltage: 1.1 (480V) OVR2 voltage: 1.2 (480V)
Setting → AC → Page 5 → OVR# time	Over-voltage region # trip time, 0.02s later than ride-through until	OVR1 time: 0.94 s, making ride-through until 0.92s OVR2 time: 0.1 s, no ride-through
Setting → AC → Page 5 → UVR# voltage	Under-voltage region # boundary, ratio of nominal voltage	UVR1 voltage: 0.88 (480V) UVR2 voltage: 0.7 (480V) UVR3 voltage: 0.5 (*480V)
Setting → AC → Page 5 → UVR# time	Under-voltage region # trip time, 0.02s later than ride-through until	UVR1 time: 20 s, making ride-through until 19.98s UVR2 time: 11 s, making ride-through until 10.98s UVR3 time: 0.1 s, no ride-through

Parameter on HMI (legacy name before M1330)	Meaning	HECO requirement
Setting → AC → Page 2 → P change mode	How the power changes when instructed, step or with ramp	Set to “Ramp rate” to enable SS and RR
Setting → AC → Page 1 → Soft-Start reconnection ramp rate	SS	<0.0032 (*Pnom/s)
Setting → AC → Page 1 → Grid reconnection delay	Grid reconnection delay	300 s
Setting → AC → Page 1 → Normal Ramp Rate	RR	1 (*Pnom/s)

Parameter on HMI (legacy name before M1330)	Meaning	HECO requirement
Setting → AC → Page 1 → AC operation mode	to enable Votl-VAr control	Set to V/VAr control to apply Votl-VAr control
Setting → AC → Page 7 → Volt/var point 1	V1 at Q1, ratio of nominal voltage	0.92 (*480V)
Setting → AC → Page 7 → Volt/var point 2	V2 at Q2, ratio of nominal voltage	0.97 (*480V)
Setting → AC → Page 7 → Volt/var point 3	V3 at Q3, ratio of nominal voltage	1.03 (*480V)
Setting → AC → Page 7 → Volt/var point 4	V4 at Q4, ratio of nominal voltage	1.07 (*480V)
Setting → AC → Page 7 → Max. inductive reactive regulation	Q4, ratio of nominal capacity	0.3 (*Pnom)
Setting → AC → Page 7 → Max. capacitive reactive regulation	Q1, ratio of nominal capacity	0.3 (*Pnom)
Setting → AC → Page 7 → Initial. inductive reactive regulation 3	Q3, ratio of nominal capacity	0 (*Pnom)
Setting → AC → Page 7 → Initial. capacitive reactive regulation 2	Q2, ratio of nominal capacity	0 (*Pnom)
Setting → AC → Page 7 → Volt/var reaction time	Volt-VAr response time	1 s
Setting → AC → Page 7 → Volt/var Vref	Vref, ratio of nominal voltage	1 (*480V)

Parameter on HMI (legacy name before M1330)	Meaning	HECO requirement
Setting → AC → Page 2 → Active power regulation	Set to Volt control to apply Volt-Watt	Unaware of present CPUC/HECO politics
Setting → AC → Page 2 → Active power regulation	Set to Freq control to apply Freq-Watt	Unaware of present CPUC/HECO politics
Setting → AC → Page 2 → Active power regulation	Set to V/F control to apply Volt-Watt and Freq-Watt at the same time. Yet Freq-Watt prior to Volt-Watt	Unaware of present CPUC/HECO politics

Parameter on HMI (legacy name before M1330)	Meaning	HECO requirement
Setting → AC → Page 8 → Volt/Watt V1	Volt-Watt V1	1.06 (*480V)
Setting → AC → Page 8 → Volt/Watt ramp rate	useless, cancelled in V1440	0
Setting → AC → Page 8 → Volt/Watt delay	Volt/Watt return delay	60 s
Setting → AC → Page 8 → Volt/Watt V2	Volt-Watt V2	1.1 (*480V)
Setting → AC → Page 8 → Volt/Watt P1	Volt-Watt P1	1 (*power setpoint)
Setting → AC → Page 8 → Volt/Watt P2	Volt-Watt P2	0 (*power setpoint)
Setting → AC → Page 8 → Volt/Watt response time	Volt-Watt response time	10 s

Parameter on HMI (legacy name before M1330)	Meaning	HECO requirement
Setting → AC → Page 8 → Freq/Watt point	Fstart, the frequency Freq-Watt supposed to start	0.25 (+60Hz)
Setting → AC → Page 8 → Freq/Watt ramp rate	Freq-Watt slope	0.05 (*power setpoint/Hz)
Setting → AC → Page 8 → Freq-Watt response time	Freq-Watt response time	0.50 s