Line-side voltage sag source positioning method and system based on limited monitoring point data

• Main Authors: NIU HAOCHUAN, ZHANG XUAN, FU JINGLEI, LIN HAORAN, TIAN CHONGFENG, YANG LE, LI HAO, SU YONGZHI
• Format: Patent
• Language: Chinese; English
• Published: 29.08.2023
• Subjects: MEASURING; MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES; PHYSICS; TESTING

The invention belongs to the technical field of electric energy quality, and provides a network-side voltage sag source positioning method and system based on limited monitoring point data, and the method comprises the steps: obtaining a possible position set of a voltage sag source through calculation, judging a fault type, and solving the voltage of a monitoring point; the actual voltage of the monitoring point and the calculated voltage of the monitoring point are utilized to calculate the minimum error, and then a possible fault line is determined. According to the method, all lines in the system do not need to be traversed, positioning of the system fault line can be achieved only through voltage data of any two monitoring points, and the method is small in calculated amount and high in positioning accuracy. From the perspective of economy, the actual requirements of systems with different voltage sag monitoring precision requirements are met. 本发明属于电能质量技术领域，提供了基于有限监测点数据的网侧电压暂降源定位方法及系统，其通过计算得到电压暂降源可能的位置集合