Comparative study on connection modes of mid-voltage distribution networks

Based on the concrete analysis of 10kV Mid-Voltage (MV) distribution network connection modes, a new approach for comparative study of their connection modes is proposed. Firstly, the customer outage cost is quantitatively calculated with the method of ratio of output value to unit electric energy (ROVTUE) consumption. Then the principle for optimizing the section number of 10kV connection modes is studied. A method to determine the section number of 10kV power line utilizing cost-profit is introduced, by which the relationship between the optimal section number and the radius of distribution lines is deduced. In addition, economy and reliability of different connection modes for distribution systems are calculated and analyzed to get their trends with load density and substation capacity varied considering the optimal section. As a result, based on quantitative analysis and synthetic consideration, some useful schemes are proposed.