Electronic power frequency parameter tester and test method for multi-circuit transmission lines on the same tower

Abstract

The invention relates to an electronic type tester for power frequency parameters of multi-circuit transmission lines on the same tower and a test method thereof. It includes a synchronous power supply, a test power supply and a transmission line parameter measurement device. The transmission line parameter measurement device includes an upper computer, a lower computer, a control switch and a data acquisition module. The synchronous power supply is directly connected to the data acquisition module, and the test power supply passes through the control switch. It is connected with the data acquisition module, the upper computer is connected with the control switch through the lower computer, and the lower computer is connected with the data acquisition module, and the data acquisition module is connected with the circuit to be tested. The invention can improve testing precision and testing efficiency. The electronic power frequency parameter tester for multi-circuit transmission lines on the same tower is small in size, light in weight, and easy to transport and use. The test method of the electronic power frequency parameter tester for multi-circuit transmission lines on the same tower 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, which easily causes the current transformer to be saturated, which seriously affects the test accuracy of the test instrument.

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