Development of fault section identification technique for low voltage DC distribution systems by using capacitive discharge current

• 作者: Chul-Ho NOH Chul-Hwan KIM Gi-Hyeon GWON Yun-Sik OH
• 来源期刊: 现代电力系统与清洁能源学报(英文)
• 学科: 工学
• 关键词: Capacitive DISCHARGE CURRENT FAULT SECTION IDENTIFICATION FAULT type IDENTIFICATION Low VOLTAGE DC distribution system
• 年，卷（期）: 2018,（3）
• 页码范围: 509-520
• 页数: 12页
• 分类号: TM72

摘要

The increasing importance of energy efficiency has led to several studies related to the construction of a reliable low voltage DC(LVDC) distribution system.Specifically, studies on a protection scheme that considers the fault characteristics of an LVDC distribution system are essential to improve system reliability. When compared to a conventional distribution system, the most distinct feature of an LVDC distribution system is the existence of a capacitive discharge current from converters under a fault condition that results in the prompt operation of protection devices. Therefore, this study involves proposing a precise and rapid technique to identify the fault section in an LVDC distribution system. The technique involves two stages, namely: an analysis stage to analyze the capacitive discharge current and a decision stage to identify the fault section based on the fault type. A detailed discussion of each step is presented and its feasibility is verified based on the results of simulations with an ElectroMagnetic Transients Program and MATLAB~?.