Much as I acknowledge and applaud Howard Smith’s role in establishing London Overground, 4 tph is the minimum turn up and go requirement. The first Mayor’s Transport Strategy (July 2001) which provided the foundations for a ‘London Metro’ and set out its core elements, defined a turn u...
Power transformer is one of the most important electrical equipment in the power system and plays the role of converting voltage in transmission lines [1]. Among them, oil-immersed transformers are widely used in power systems, with a proportion as high as 90 % [2]. In the long-term op...