An economy and reliability comprehensive assessment method of distribution network connection modes

Comparison of the connection modes is one of the most important questions in the planning and maintaining of the urban distribution networks. Considering the characteristic of the actual distribution networks, this paper creates a load distribution model in which considers load density as the main indicator, considers the constraints such as current limit and voltage drop limit of the branches, and sets up unified reliability and economy indicators. Based on the above studies, this paper establishes an economy and reliability comprehensive assessment method which is suitable for the analysis of the distribution network connection modes. Then, this paper does a comparison of different connection modes in overhead lines and cable lines using the assessment method, and gets comparison results under different line lengths and different load density situation.