配电网在线优化一般基于量测信息计算调控指令,配电网限于建设成本,量测装置较少,可在线采集到的功率和电压数据通常难以覆盖整个配电网,基于在线量测数据建立的电网实时潮流模型不精确.鉴于此,提出一种基于生成网络的配电网在线状态重建技术,通过部分节点电压、线路电流量测数据完成对整个配电网量测数据的补全,从而满足在线优化的需求.

在对电力建设工程进行管理的过程中,临时用电的管理是不可忽视的重要环节.其中,三级配电箱具有分布随机、数量众多、移动频率高等特点,往往无法实现可靠的接地保护,为现场的管理工作带来重大挑战.鉴于此,针对施工现场实际需求,设计了基于物联网技术的接地监测装置,用于即时获取施工范围内配电箱的接地状况.

Using the triaxial high temperature superconducting cables (HTSC) for high density load supply in modern cities is a new development direction. Since the triaxial HTSCs have a different structure from the common cables, their reactance cannot be calculated by conventional methods. In order to establish a basis for further research on operation control, it is important to study the analytical power frequency reactance calculation method of the triaxial HTSC. In this paper, the mathematical model of the triaxial HTSC is established based on the branch parameter method. Based on the model, the analytical calculation method of the three-phase reactance and sequence reactance parameters is established considering the magnetic field coupling and boundary conditions. The calculated values are compared with the measured sequence reactance values of the triaxial HTSC in a pilot project, and the comparison results verify the accuracy and validity of the proposed method. Furthermore, considering the asymmetrical three-phase parameters of the triaxial HTSCs, the impact on the power system operation is tested through the simulation model based on the pilot project network. Simulation results show that the impact is small and does not endanger the system stability.