Positioning system and method for electric energy quality disturbance source

Abstract

The invention relates to a positioning system and a positioning method for an electric energy quality disturbance source. The positioning system comprises online electric energy quality monitoring devices, wherein each online electric energy quality monitoring device is connected between every two master electric energy quality management stations through the Ethernet. Each online electric energy quality monitoring device is arranged at a monitoring point of a power transmission line of a radiation type power distribution system, and every two online electric energy quality monitoring devices are connected through the Ethernet; when an actual disturbance event occurs in the system, one of the online electric energy quality monitoring devices detects the disturbance event, then records an occurrence moment of the disturbance source, informs the other online electric energy quality monitoring devices in the network through the Ethernet in a broadcasting way to start a disturbance wave recording system on the basis of the moment, records sampling data of N cycles before the moment and N cycles after the moment, and sends the sampling data to the master electric energy quality management stations in real time; through the mutual cooperation of all the online electric energy quality monitoring devices, a system coverage matrix and a system direction matrix are established, and then the disturbance source is positioned.

Description

technical field [0001] The invention relates to the field of on-line monitoring of power quality pollution sources, in particular to a positioning system and a positioning method for power quality disturbance sources in a power grid. Background technique [0002] In recent years, with the rapid development of the economy, the power load has grown rapidly, and the power load has become increasingly complex and diversified. More and more non-linear, impactful, unbalanced and harmonic-rich application equipment have been connected to the power grid one after another. Different degrees affect the power quality of the power grid. Coupled with imperfect monitoring methods, operation, external interference and various faults, power quality problems have become increasingly prominent. [0003] At present, research hotspots related to power quality in power systems mainly focus on the following aspects: identification and processing of power quality signals, power quality evaluation...

AI Technical Summary

Problems solved by technology

The disadvantage of this method is that it is necessary to rely on manual comparison to locate the disturbance source, and the work efficiency is low.

The disadvantage of this method is that it can only determine the front and rear directions of the disturbance source relative to the monitoring point, and when a power quality event occurs in the power network, it cannot really realize the precise location of the disturbance source (such as locating to a specific line). ), establish a disturbance source location optimization model, and use genetic algorithm to further increase the calculation and storage capacity of the power quality on-line monitoring device

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