This report examines the complex process of transforming power systems. It offers evidence for power system transformation by providing a collection of empirical examples of the types of innovations that are emerging worldwide. The authors aim to bolster the evidence for power system transformation by providing empirical examples of the types of innovations that are emerging worldwide. The examples cited are intended to show what power sector transformation is and how it is being achieved. According to the authors, the cases studied reveal that the innovation required to transform power systems includes policy, planning, operation, finance and business models.