Experimental Evaluation of Grid Support Enabled PV Inverter Response to Abnormal Grid Conditions
- National Renewable Energy Laboratory (NREL), Golden, CO (United States)
- Florida Power and Light Company
As revised interconnection standards for grid-tied photovoltaic (PV) inverters address new advanced grid support functions (GSFs), there is increasing interest in inverter performance in the case of abnormal grid conditions. The growth of GSF-enabled inverters has outpaced the industry standards that define their operation, although recently published updates to UL1741 Supplement SA define test conditions for GSFs such as volt-var control, frequency-watt control, and voltage/frequency ride-through, among others. This paper describes the results of a comparative experimental evaluation on four commercially available, three-phase PV inverters in the 24.0-39.8 kVA power range on their GSF capability and its effect on abnormal grid condition response. The evaluation examined the impact particular GSF implementations have on run-on times during islanding conditions, peak voltages in load rejection overvoltage scenarios, and peak currents during single-phase and three-phase fault events for individual inverters. Testing results indicated a wide variance in the performance of GSF enabled inverters to various test cases.
- Research Organization:
- National Renewable Energy Lab. (NREL), Golden, CO (United States)
- Sponsoring Organization:
- Florida Power and Light Company
- DOE Contract Number:
- AC36-08GO28308
- OSTI ID:
- 1423550
- Report Number(s):
- NREL/CP-5D00-71019
- Resource Relation:
- Conference: Presented at the 2017 IEEE Power & Energy Society Innovative Smart Grid Technologies Conference (ISGT), 23-26 April 2017, Washington, D.C.
- Country of Publication:
- United States
- Language:
- English
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