SolarEdge Inverter Compliance with HECO Fast Trip Requirement

Mar. 4 2014
SolarEdge Inverter Compliance with HECO Fast Trip Requirement
Hawaiian Electric Companies (HECO) has introduced a Transient Over Voltage (TOV) mitigation requirement for
fast PV system tripping in cases of grid over-voltage, to prevent risks associated with these transient overvoltages.
To comply with this requirement, a fast-acting transformer switch may be used, or a compliant inverter. A
compliant inverter is an inverter that trips within 1 cycle (16ms) when the grid voltage exceeds 120% of
nominal grid voltage and has a time delay of at least 5 minutes before resetting.
SolarEdge inverters with CPU firmware version 2.640 and higher are compliant with this requirement. To
demonstrate this compliance, over-voltage scenarios were simulated in the lab and the inverter’s
disconnection time was measured.
Single Phase Inverter Measurements
Measurements were made for both a 240Vac grid and a 208Vac grid. For each grid three measurements were
made. The results below are those with the longest trip time.
Three Phase Inverter Measurements
Measurements were made for a 120/208Vac grid.
SolarEdge Technologies | www.solaredge.com
USA
Germany
Italy
Japan
Israel
China
3347 Gateway Boulevard, Fremont, CA, 94538
Bretonischer Ring 18, 85630 Grasbrunn (Munich)
VISMUNDA SRL, Corso Del Popolo 50/A, Treviso
B-9 Ariake Frontier Building, 3-7-26 Ariake, Koto-Ku, Tokyo 135-0063
6 HeHarash St. P.O.Box 7349, Neve Neeman, Hod Hasharon 45240
City Center, 100 Zunyi Road, Building A, Unit 1204, Shanghai 200051
Measurement #1 – Single phase inverter, 240V grid
Vstart = 276V
Vthreshold = 288V (=1.2 x 240V)
Vfinal = 300V
Trip time = 13.7ms
SolarEdge Technologies | www.solaredge.com
USA
Germany
Italy
Japan
Israel
China
3347 Gateway Boulevard, Fremont, CA, 94538
Werner-Eckert-Straße 6, Munich 81829
VISMUNDA SRL, Corso Del Popolo 50/A, Treviso
B-9 Ariake Frontier Building, 3-7-26 Ariake, Koto-Ku, Tokyo 135-0063
6 HeHarash St. P.O.Box 7349, Neve Neeman, Hod Hasharon 45240
City Center, 100 Zunyi Road, Building A, Unit 1204, Shanghai 200051
Measurement #2 – Single phase inverter, 208V grid
Vstart = 240V
Vthreshold = 249.6V (=1.2 x 208V)
Vfinal = 260V
Trip time = 13.8ms
SolarEdge Technologies | www.solaredge.com
USA
Germany
Italy
Japan
Israel
China
3347 Gateway Boulevard, Fremont, CA, 94538
Werner-Eckert-Straße 6, Munich 81829
VISMUNDA SRL, Corso Del Popolo 50/A, Treviso
B-9 Ariake Frontier Building, 3-7-26 Ariake, Koto-Ku, Tokyo 135-0063
6 HeHarash St. P.O.Box 7349, Neve Neeman, Hod Hasharon 45240
City Center, 100 Zunyi Road, Building A, Unit 1204, Shanghai 200051
Measurement #3 – Three phase inverter, 120/208V grid
Vstart = 120Vrms
Vthreshold = 144Vrms (=1.2 x 120V)
Trip time = 14.4ms
SolarEdge Technologies | www.solaredge.com
USA
Germany
Italy
Japan
Israel
China
3347 Gateway Boulevard, Fremont, CA, 94538
Werner-Eckert-Straße 6, Munich 81829
VISMUNDA SRL, Corso Del Popolo 50/A, Treviso
B-9 Ariake Frontier Building, 3-7-26 Ariake, Koto-Ku, Tokyo 135-0063
6 HeHarash St. P.O.Box 7349, Neve Neeman, Hod Hasharon 45240
City Center, 100 Zunyi Road, Building A, Unit 1204, Shanghai 200051

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