Power transmission line fault location system based on PMU (phasor measurement unit) and method

Abstract

The invention provides a power transmission line fault location system based on a PMU (phasor measurement unit) and a method, and relates to the technical field of power system fault location. The system comprises a data monitoring layer for classifying and storing measurement information acquired by the PMU and performing fault monitoring, and a fault location layer for analyzing a type of a fault and locating a fault point. The fault location method of the system comprises the steps of allowing the data monitoring layer to judge the fault of a power transmission line and upload relevant nodedata of the faulty power transmission line to the fault location layer, allowing the fault location layer to process the relevant node data of the faulty line to accomplish location of the fault point, calculating an equivalent node where a PMU node is arranged to obtain a position of the fault point, and performing iterative calculation to reduce a calculation error. The power transmission linefault location system based on the PMU and the method solve the problem in synchronism of the measurement information and achieve the quick and effective location and calculation of the fault of the power transmission system.

Description

technical field [0001] The invention relates to the technical field of power system fault location, in particular to a transmission line fault location system and method based on a PMU device. Background technique [0002] As the power system becomes more and more complex, its stability is becoming more and more important. Once the transmission line fails, it will cause the entire system to oscillate, and serious failures may even lead to the collapse of the entire regional or even larger power system. In traditional protection, the action area of ​​quick-break protection often cannot cover the entire transmission line that needs to be protected, and in backup protection at all levels, there are problems such as complicated setting process of protection and delay in action. Therefore, the lines in the transmission system appear In the event of a fault, it is very important to be able to collect, store and analyze the fault information and accurately locate the fault point un...

AI Technical Summary

Problems solved by technology

[0003] In the traditional algorithm based on fault information collection, analysis and location, the impedance parameter of the entire transmission line is taken as a known quantity, and the error of the line parameter often affects the accuracy of fault point location

At the same time, in actual operation, factors such as line loss will also change the actual parameters of the line, and the traditional transmission line fault data collection and location based on the entire transmission line parameters will produce certain errors

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