Aswat, Muhammed2019-03-072019-03-072018Aswat, Muhammed (2018) An autonomous smart battery for an isolated 12V distributed DC grid, University of the Witwatersrand, Johannesburg, <http://hdl.handle.net/10539/26522>https://hdl.handle.net/10539/26522A dissertation submitted to the Faculty of Engineering and the Built Environment, University of the Witwatersrand, Johannesburg, in fulfilment of the requirements for the degree of Master of Science in Engineering, Johannesburg 2018An autonomous smart battery is developed to incorporate storage on an isolated 12V DC grid called the PeCo grid. The PeCo grid is a personal consumer grid aimed at electrification of rural areas with no existing electrical infrastructure. In order to develop the smart battery a 12V lead-acid battery is combined with a Dual Active Bridge (DAB) bi-directional DC-DC converter. Using this combination with the relevant control algorithms the smart device achieves grid stabilisation, black starting and fault protection without the use of a dedicated communication network. These features are achieved through the usage of a decentralised control architecture that is solely based upon the grid voltage. The smart battery is able to seamlessly integrate into an existing system due to its plug and play nature. A working prototype of the smart battery is developed and experimentally validated on the distributed energy system.Online resource (127 leaves)enSignal processingTransients (Electricity)Thesis