Study On Connection Modes Of Urban Distribution Networks Based On Equal Load Density Comparison Method

In the planning of urban distribution networks, the selection of connection modes, which involves various considerations such as the reliability and economies of networks and even the surroundings of religion planned, relates to the whole distribution networks planning. Therefore, this essay provides the standards for selecting optimal connection modes in different load density conditions, after the evaluation of reliability and economies of ten kinds of connections, which are most commonly used, such as high voltage and medium voltage networks, based on equal load density comparison method.First of all, this essay will study a mass of load data of customers and derive related load density indexes for various customers, which will lay a foundation for the establishment of equal load density comparison method in the following section. Moreover, it will conduct qualitative and quantitative analyses and comparison for high and medium voltage connections of urban distribution networks, backed up by calculating the index of reliability, economies, operation characteristics and voltage qualities. According to the function features of various customers, using expressions of different load density interval-numbers, this thesis will propose the standards for selecting optimal connection modes in various load conditions, based on equal load density comparison model.The approach referred to in this essay takes Shanghai central urban for instance. With corresponding procedures calculated and comparative analyses, recommended connection modes of distribution networks in the above regions will be achieved in various load density conditions respectively so as to verify the feasibility and rationality of the proposed method.