Electronic tester for power frequency parameters of same-tower multi-loop electric transmission line and testing method of electronic tester for power frequency parameters of same-tower multi-loop electric transmission line

Abstract

The invention discloses an electronic tester for power frequency parameters of a same-tower multi-loop electric transmission line and a testing method of the electronic tester for the power frequency parameters of the same-tower multi-loop electric transmission line. The electronic tester comprises a synchronous power source, a testing power source and an electric transmission line parameter testing device. The electric transmission line parameter testing device comprises an upper computer, a lower computer, a control switch and a data collecting module, wherein the synchronous power source is directly connected with the data collecting module, the testing power source is connected with the data collecting module through the control switch, the upper computer is connected with the control switch through the lower computer, the lower computer is connected with the data collecting module, and the data collecting module is connected with lines to be tested. By means of the electronic tester and the testing method, the testing accuracy and the testing efficiency can be improved. The electronic tester for the power frequency parameters of the same-tower multi-loop electric transmission line is small in size, light in weight and convenient to transport and use. The testing method of the electronic tester for the power frequency parameters of the same-tower multi-loop electric transmission line is convenient and practical.

Description

technical field [0001] The technical solution to be protected by the present invention relates to an electronic tester for power frequency parameters of multi-circuit power transmission lines on the same tower and a test method thereof. Background technique [0002] The power frequency parameter of the transmission line is a necessary parameter for the analysis and calculation of the power system and the selection of the operation mode of the power system, and its accuracy is directly related to the safe, reliable and economical operation of the power system. At present, the methods for obtaining power frequency parameters of transmission lines at home and abroad mainly include theoretical calculation methods and field measurement methods. The theoretical calculation method of line parameters, because it involves some difficult factors such as soil resistivity, current equivalent depth, etc., the calculation accuracy is seriously affected. Therefore, engineering requires th...

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Problems solved by technology

However, because the instrument uses physical transformers, transformers, circuit breakers, and contactors, it is bulky, heavy, and consumes a lot of power, which brings great inconvenience to transportation and measurement.

At the same time, since the test circuit has no current limiting measures, and the test power supply voltage is high, when the line is short, the test current is large, and the current transformer is easily saturated, which seriously affects the test accuracy of the test instrument.

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