Supraharmonics in transmission and distribution networks

Standards for harmonics in power networks (transmission and distribution) usually deal with the range below 2 kHz, as most of the harmonics due to waveform distortion fall into this range. Harmonics or disturbances in the range above 2 kHz are becoming noticeable in networks due to the introduction of inverter based distributed generators, and are […]

Dealing with inrush currents in distribution transformers

Among the subtleties associated with distribution switchgear configuration, inrush current is a necessary evil which must be taken into consideration. It is the source of much frustration for field operators and SCADA control teams; when issuing a close command on an open breaker results in an immediate trip. Was it genuine fault? Is it risky […]

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