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Recently, I have been doing some power systems studies in the utility I work in. In our short-circuit studies, we usually only consider 3-phase and single-phase faults.

However, I noticed that the double-line-to-ground fault level is extremely higher, to the point it far exceeds the circuit breaker ratings on many substations.

Since it is not conventional to study double-line-to-ground, and it is never seen in the recommendations of international standards such as IEC, do you think it is important that I consider it in my studies?

This concern has been bothering me for a while. I look forward to hearing your thoughts.

Recently, I have been doing some power systems studies in the utility I work in. In our short-circuit studies, we usually only consider 3-phase and single-phase faults.

However, I noticed that the double-line-to-ground fault level is extremely higher, to the point it far exceeds the circuit breaker ratings on many substations.

Since it is not conventional to study double-line-to-ground, and it is never seen in the recommendations of international standards such as IEC, do you think it is important that I consider it in my studies?

This concern has been bothering me for a while. I look forward to hearing your thoughts.