直流微电网方向纵联保护方法研究  

Analysis of directional pilot protection method for DC microgrid

作　　者：张林 邰能灵[1] 刘剑[1] 杨亚宇[1] 王彦虹 Zhang Lin;Tai Nengling;Liu Jian;Yang Yayu;Wang Yanhong(School of Electronic Information and Electrical Engineering,Shanghai Jiao Tong University,Shanghai 200240,China)

机构地区：[1]上海交通大学电子信息与电气工程学院,上海200240

出　　处：《电测与仪表》2018年第20期1-7,共7页Electrical Measurement & Instrumentation

基　　金：国家自然科学基金资助项目(51407115);国家重点研发计划(2016YFB0900601);教育部科学技术研究项目(113023A)

摘　　要：目前,直流微电网的保护技术依然面临挑战,保护方法和设备仍落后于交流系统,不能满足快速、准确隔离故障的要求。文中以环状直流微电网作为研究对象,分析了电流故障分量方向特征,并阐述了方向纵联保护原理。为了响应直流微电网故障特点,满足快速保护的要求,以智能电子设备为基础,设计了保护方案。该方案具有明确的保护区域,能够快速识别和隔离故障,不受故障类型和位置影响,且具有较好的抗过渡电阻性能。利用PSCAD/EMTDC建立了直流微电网模型,仿真结果验证了文中所提保护方案的有效性。At present,the protection technology of DC micro-grid is still facing challenges,the protection methods and equipment still lag behind the AC system,and the fast and accurate fault isolation requirements cannot be met.This paper took the ring DC micro-grid as a research object,analyzed the current fault component direction characteristics,and explained the directional pilot protection principle.In order to meet the characteristics of DC micro-grid fault and the requirements of rapid protection,the protection scheme is designed based on the intelligent electronic device.The scheme has a clear protection zone and can quickly identify and isolate the fault immune to the impact of the fault type and location.Meanwhile,the scheme has satisfactory performance to transition resistance.The DC micro-grid models are established in PSCAD/EMTDC.The simulation results verify the effectiveness of the proposed scheme.

关 键 词：直流微电网 故障特性 方向纵联保护 智能电子设备 

分 类 号：TM933[电气工程—电力电子与电力传动]