主动扰动技术在停电配电线路相间故障检测中的应用  

Application of active disturbance technology in detecting interphase fault of de-energized distribution lines

作　　者：朱珂[1] 李德强[1] 妥建军 张波[1] ZHU Ke LI Deqiang TUO Jianjun ZHANG Bo(Key Laboratory of Power System Intelligent Dispatch and Control of Ministry of Education, Shandong University,Ji＇nan 250061,China)

机构地区：[1]山东大学电网智能化调度与控制教育部重点实验室,山东济南250061

出　　处：《电力自动化设备》2017年第1期191-196,共6页Electric Power Automation Equipment

基　　金：山东省重点科技计划资助项目(2015GGX104010);山东省自然科学基金资助项目(ZR2013EEM026)~~

摘　　要：提出了一种停电中压配电线路相间故障检测技术。在配电变压器低压侧经电力电子开关接入一逆变电源,馈线停电后,通过控制电力电子开关将逆变电源经配电变压器短时接入,在给停电线路故障相间施加瞬时高压以击穿可能存在的故障点的同时,通过对断路器下游侧暂态电压的检测与分析判定是否存在相间故障。该技术无需通信,既可用于配电线路自适应重合闸,也可用于停电一段时间后的尝试性送电,理论、仿真分析和模拟实验均验证了所提技术的有效性。A method for detecting the interphase fault of de-energized MV（Middle Voltage） distribution lines is proposed. An inverter is connected to the LV（Low Voltage） side of distribution transformer via an electronic power switch. When a feeder is de-energized,the inverted power supply is exerted on the distribution transformer temporarily by controlling the electronic power switch to inject a transient high-voltage into the de-energized lines for disrupting the possible interphase fault. At the same time,the transient voltage at the downstream-side of breaker is measured and analyzed to detect the possible interphase fault. Without communication,the proposed method can be applied to the adaptive reclose of distribution lines as well as the tentative power supply after a temporary power-loss,which is verified by theoretical analysis,simulative analysis and simulation experiment.

关 键 词：配电网 晶闸管 故障检测 小波分析 主动扰动技术 停电 相间故障 

分 类 号：TM76[电气工程—电力系统及自动化]