Quick override trip fault positioning method based on power line carrier technology

• Main Authors: FENG SHUAIJUN, WANG HONGMIAO, ZHAI WENBO, WANG QIANG, MA YUEJUN
• Format: Patent
• Language: Chinese; English
• Published: 23.03.2016
• 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

The invention discloses a quick override trip fault positioning method based on a power line carrier technology. The method is characterized in that an intelligent distributed structure is adopted and comprises a plurality of controllers and distribution terminals in one-to-one correspondence, and the controllers are uniformly distributed on a power line. When a single-phase ground fault occurs, the fault can be judged by means of negative- and zero-sequence changes (logic or calculation results of zero-sequence voltage changes and zero-sequence current changes), power line carrier changes (comparing the signal-to-noise ratio of transmitting signals and receiving signals of the controllers with a set value) and logic operation changes, so that the fault can be quickly determined and override trip can be excluded. The method overcomes the defects of local control, centralized control and intelligent distributed control, prolongs the service life of a switch, does not need a dedicated communication network, and