Effective grounding in photovoltaic (PV) systems is the creation of a low-impedance reference to ground at the AC side of the inverter—or group of inverters—that is designed to be compatible with the distribution network's requirements and existing grounding scheme.
If there are multiple inverters used in a PV plant, only one grounding bank is required at the PCC to achieve effective grounding for the whole plant.
When a PV plant is installed in the distribution feeder, the plant shall meet the IEEE 1547 standard and the interface requirements of the local utility company. Some utility companies require PV inverters to have AC side grounding in order to assure compatibility with their grounding scheme, generally referred to as effective grounding.
IEEE Std C62.92.1-2000, IEEE Guide for the Application of Neutral Grounding in Electircal Utility Systems – Part I: Introduction. 4. IEEE Std C62.92.4-2000, IEEE Guide for the Application of Neutral Grounding in Electircal Utility Systems – Part IV: Distribution. 5. National Electrical Code Handbook 2011, Article 450.5 Grounding Autotransformers.
Lightning protection requirements communication for and solar station management system grounding container energy Are lightning protection and grounding a non-negotiable safety measure for C&I PV power plants?
I. INTRODUCTIONII. DISTRIBUTION LINE FAULTS AND GROUNDINGC BIV. CONSIDERATIONS FOR PV INVERTER EFFECTIVE GROUNDINGEffective Grounding using the inverter''s internal transformerEffective Grounding using a grounding bankAs was explained previously, a grounding bank provides the same effective grounding as the grounding reactor connected to the transformer neutral as shown in Figure 3 b). As the device is connected external to the inverters, it allows for the inverters to be connected without neutral. If there are multiple inverters used in a PV plant, only one g...See more on solectria hugeelectrical [PDF]
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