Today is just another day at your local HV substation. Inside, the transformers gently hum and switchgear sit idle. Outside, a neighbour’s neglected tree loses a branch, which clashes with an overhead line. Ask yourself: What happens next? That depends on the substation design and their protection systems, which are the focus of this post.
Protection systems
So, what are protection systems? It’s a system that controls switchgear to detect and correct electrical faults. Generally, combining In a home, the switchgear and protection in a single unit, such as a fuse or MCB. The high voltage world is surprisingly similar, only the switchgear is much larger, and the protection systems separated.
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