供用电
供用電
공용전
DISTRIBUTION & UTILIZATION
2015年
4期
32-37,45
,共7页
薛永端%张海台%李成刚%徐丙垠
薛永耑%張海檯%李成剛%徐丙垠
설영단%장해태%리성강%서병은
小电流接地系统%小电流接地故障%故障选线%故障定位%暂态
小電流接地繫統%小電流接地故障%故障選線%故障定位%暫態
소전류접지계통%소전류접지고장%고장선선%고장정위%잠태
non-solidly earthed network%single-phase earth fault%faulty feeder selection%fault section location%transient
我国中压配电网中性点多采用不接地或经消弧线圈接地方式，单相接地（小电流接地）时故障选线和定位困难，长期以来现场实用效果均不理想。接地故障瞬间存在明显的暂态过程，暂态信号包含了丰富的故障位置信息。介绍了利用暂态信号的小电流接地故障选线技术，以及基于配电网自动化（DA）系统的暂态故障分段定位技术。暂态检测技术可靠性高、适应性好、无安全隐患，已在现场获得成功应用。
我國中壓配電網中性點多採用不接地或經消弧線圈接地方式，單相接地（小電流接地）時故障選線和定位睏難，長期以來現場實用效果均不理想。接地故障瞬間存在明顯的暫態過程，暫態信號包含瞭豐富的故障位置信息。介紹瞭利用暫態信號的小電流接地故障選線技術，以及基于配電網自動化（DA）繫統的暫態故障分段定位技術。暫態檢測技術可靠性高、適應性好、無安全隱患，已在現場穫得成功應用。
아국중압배전망중성점다채용불접지혹경소호선권접지방식，단상접지（소전류접지）시고장선선화정위곤난，장기이래현장실용효과균불이상。접지고장순간존재명현적잠태과정，잠태신호포함료봉부적고장위치신식。개소료이용잠태신호적소전류접지고장선선기술，이급기우배전망자동화（DA）계통적잠태고장분단정위기술。잠태검측기술가고성고、괄응성호、무안전은환，이재현장획득성공응용。
The neutral point of medium voltage distribution systems are almost isolated or grounded via Petersen coil in China. With great difficulty, the faulty feeder selection and faulty section location under the single-phase earth fault have poor practice effect. There is a distinct transient process after the occurrence a fault which contains detailed fault position information. The transient signals based faulty feeder selection and the transient faulty section location technologies based on Distribution Automation system are introduced in this paper. With high reliability, excellent adaptability and safety, the detection technologies based on transient signals have already been applied onsite successfully.
