Question: What is the name of this Australian generation, electricity and gas retailing private company that is owned by Hong Kong-based Chow Tai Fook Enterprises and operated and maintained the Northern Power Station in Port Augusta? 
Sentence (from "Northern Power Station (South Australia)"): Northern Power Station is located in the locality of Port Paterson in the Australian state of South Australia about 6 km south of the city centre of Port Augusta.
Relevant evidence: Yes