An inverter grounding design tool (ISGT) is introduced. Effective grounding is a “power system” characteristic, affected by DER. Inverters’ need for supplemental grounding and their responses to ground fault and grid disconnection are significantly different than synchronous machines.
Effective grounding is a “power system” characteristic, affected by DER. Inverters’ need for supplemental grounding and their responses to ground fault and grid disconnection are significantly different than synchronous machines. 2020 Electric Power Research Institute (EPRI), Inc. All rights reserved.
Effective Grounding for Inverter-Connected DER: Final Report. EPRI, Palo Alto, CA: 2021. 3002020130. Effective grounding is a characteristic of electric power systems for limiting ground fault overvoltage and considered in coordination of fault current protective devices.
Adding distributed energy resources (DER) can affect power system grounding and is normally evaluated in the interconnection review process. The research reported here focused on effective grounding during island conditions and aimed to clarify grounding requirements with inverter-based DER.
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