Voltage sag source accurate location optimization method applicable to intelligent distribution network

• Main Authors: Bi Ruyu, Ye Jing, Lin Tao, Xu Xialing, Chen Rusi
• Format: Patent
• Language: Chinese; English
• Published: 10.08.2016
• 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 relates to a voltage sag source accurate location optimization method applicable to an intelligent distribution network. After voltage sag, the candidate distribution areas of the sag source are determined first based on the principle of sequence power increment direction, and then, the cause of voltage sag is identified to guide positioning in a targeted manner. For voltage sag caused by short circuit, a step-by-step optimization model for finding out a nearest bus and an accurate fault location is established in the candidate distribution areas by taking the fault location and transition resistance as optimization variables and minimum error between the calculated values and observed values of current and voltage at limited observation points as the goal according to the idea of inversion and based on an intelligent distribution network short-circuit current calculation method taking into consideration the influence of access of new energy to an inverter interface, and the model is solved usin