As of my last knowledge update in September 2021, the term "transformer zero-phase sequence voltage grounding" doesn't correspond to a well-known concept in the field of electrical engineering or power systems. It's possible that this term may have emerged or gained significance after my last update, or it could be a specific term used within a certain context or industry niche that I'm not aware of.
However, I can provide you with some general information about grounding and transformers in power systems, which might be relevant to your query:
Transformer Grounding: Transformers are devices used to transfer electrical energy between two or more circuits through electromagnetic induction. Grounding in the context of transformers involves connecting a portion of the transformer windings or casing to the earth or ground. This is done primarily for safety reasons to prevent excessive voltages and provide a return path for fault currents.
Zero-Phase Sequence Voltage: In a three-phase power system, there are three types of voltages: positive sequence, negative sequence, and zero sequence. Zero-phase sequence voltage refers to the voltage that is present in all three phases and is in-phase with each other. It is typically associated with unbalanced conditions, such as ground faults or asymmetrical loads.
If you have encountered the term "transformer zero-phase sequence voltage grounding" in a specific context, such as a new technology, a research paper, or a recent development, I recommend consulting more recent and specific sources to gain a better understanding of this concept. If you could provide more details or context, I'd be happy to try to help further.