Optimisation of transformer tap settings on primary radial distribution systems

The determination of tap settings for zone and distribution transformers within primary radial distribution systems is important to ensure customer voltages are always maintained within limits irrespective of system load. The thesis describes a computer programme which can analyse the performance of primary radial distribution systems comprising of zone and distribution transformers. The programme can be used to determine the optimum tap settings of both zone and distribution transformers to ensure that customer supply voltages are always within limits irrespective of system load. The computer programme presented Is fully applicable to any primary radial distribution system where zone transformers have 'On Line Tap Change' (O.L.T.C.) facilities and the distribution transformers have 'Off Circuit Tap Change' (O.C.T.C.) facilities.