计及报装容量阶跃性的中压配电网接线模式研究

摘要

Considering the influence caused by user’ s stepwise capacity in mid-voltage distribution network, the dead zone model of power supply capability, which reflects the shortfall in actual load supply capability compared by the ideal one, is presented in this paper. Expectation of load and number of users in one feeder is firstly ana-lyzed based on the probability distribution of user’ s capacity. According to the results above, this paper also gives out the formulation of several indices by using dead zone model, such as load ratio of feeder, utilization ratio of in-tervals in substation and average interval occupation per user, which are used to evaluate the efficiency of different types of connection mode in mid-voltage distribution network. The final example shows that, in order to promote the operational economy, this kind of method can greatly enhance the access capacity of one feeder and resource utiliza-tion in distribution network, meanwhile decreasing the negative impact caused by dead zone.%将用户报装容量纳入接线模式研究过程，建立了供电能力“死区”模型。对用户报装容量概率分布条件下的线路期望负荷、期望接入用户数进行了分析，并以此为基础提出了计及“死区”影响的线路负载率、变电站出线间隔利用系数和用户平均占用出线间隔数等指标的计算方法。实际算例表明，该方法能够有效降低“死区”造成的不利影响，大幅度提升馈线实际接入能力和电网资源实际利用率，对提高配电网规划建设的经济性具有较强的指导意义。