基于差动偏移度的配网线路故障区段定位方法

• Format: Patent
• Language: Chinese
• Published: 13.02.2018
• Subjects: GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ONOTHER TECHNOLOGY AREAS; MEASURING; MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES; PHYSICS; SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORKOPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FORIMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION,DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS; TESTING

本发明公开了种基于差动偏移度的配网线路故障区段定位方法，对于接地故障，通过分析故障相电流在故障发生前及故障发生至消弧线圈动作前的相电流特征，从中提取故障特征量，并采用全过程的波形差动偏移度进行定位。本发明仅需测量线路的故障相电流，方案简单，适用性强，可很好解决目前普遍存在的小电流接地系统单相接地故障时故障电流微弱、可靠性差、灵敏度低的问题，同时不会对系统引入干扰。 The invention discloses a distribution network line fault segment positioning method based on differential offset degree. An earth fault is positioned through analyzing the phase current characteristics of a fault phase current before fault occurrence and during the period from fault occurrence to action of an arc extinguishing coil, extracting a fault characteristic quantity from the phase current characteristic and utilizing the full-course waveform differential offset degree. The distribution network line fault segment positioning method only requires measurement for the fault phase current of the line and has advantages of simple solution and high applicability. The distribution network line fault segment positioning method can well settle problems of weak fault current, low reliability and low sensitivity which commonly exi