楼宇交直流混合配电系统及其运行管理

AC/DC hybrid distribution system of buildings and its operation management

为解决传统交流配电系统对新能源消纳能力有限、潮流协调控制难度较大的问题,考虑在原有系统基础上融合低压直流系统,形成交直流混合配电系统,并就其在楼宇用户端应用的可行性及运行特性进行研究。本文从拓扑结构、电压等级、系统配置等方面重点叙述了系统设计过程。系统保护方面,交流侧采用传统保护策略,直流侧采用了包括干线智能开关一体化保护和馈线主动式保护在内的直流保护策略及设备。此外,构建了运行管理系统以实现系统的运行管理。运行结果表明,该系统具有良好的运行特性,在充分利用太阳能,有效提高建筑供电系统的供电可靠性方面具有现实意义。

In order to solve the problems of the traditional AC distribution system,which has limited capacity to absorb new energy and difficult to coordinate power flow control,a hybrid AC/DC distribution system is formed by integrating the low-voltage DC system with the original system,and the feasibility and operation characteristics of its application in building users are studied.The system design process from the aspects of topology,voltage level and system configuration is introduced in the paper.The traditional AC protection strategy is adopted on the AC side of the system.DC protection strategies and equipment including integrated intelligent switch protection and active comprehensive protection of feeders are designed for protecting the DC side branches of the system.In addition,an operation management system is built to realize the operation management of the system.The operation results show that the system has good operating characteristics,and it is of practical significance to make full use of solar energy and effectively improve the power supply reliability of the building power supply system.