Innovative rectifier modernization technologies for legacy power efficiency improvement

Circa 20 years ago, a large amount of small and medium distributed DC power systems were deployed in BT's UK fixed network. There is an aspiration to replace rectifiers used in the power systems with modern high efficiency products, but how to make it a good business case? BT in partnership with Huawei has devised a solution that achieves a 3 years ROI with many novel rectifier replacement techniques.