NOYAFA Electronic specializing in testing instruments and cable testers for 16 years
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NOYAFA Electronic specializing in testing instruments and cable testers for 16 years
my country's economic development is that everyone is obvious. The economic development of the country has led to the development of all walks of life, and all kinds of construction work has also been continuously enhanced. The national power grid construction scale continues to expand, although my country has also promoted and applied many high-voltage my country's economic development, which is a visible, the country's economic development has driven the development of all walks of life, and all kinds of construction work has also been continuously enhanced. The scale of power grid construction is continuously expanded. Although my country has also promoted and applied multi-channel high-voltage cable technology, its structure is also more complex, causing multi-channel failure problems in high voltage cables.
Below we discuss with high voltage cable fault positioning issues. The high-voltage power transmission line has been influenced by the environmental changes in recent years. The insulation of the cable is being tidy because of the rainy weather and the water conditions. The overall overheating of the cable is overall. The appearance of the voltage over the cable used is not only affect people. The electricity experience will also cause loss of irreparable economic benefits to the relevant electrical enterprises. How to make the positioning and rapid remediation of multi-branch high voltage delivery line cable failure, this problem has become the focus of the power supply sector and power company.
I. Construction and analysis of cable simulation models and analysis of the current natural environment, harsh natural environment is also getting more and more serious for natural wear of cable lines. Therefore, the cable is smoothly continuously running requires cable protection to protect the cable, and the cable protective layer usually protects the cable. We need to consider the cable, and we must select the power supply device that matches the cable in the test.
But we need to note that the conventional selection of the circuit and the resistor is required when setting the power supply data, and do not exceed the range of the cable. Second, the simulation simulation and analysis of two T lines is an innovative technique for the model of multi-branch cable settings today, but it is now widely used in this technology. We can evaluate the idea of two T line design, design, design, and evaluate the effect after small range, in a large city, and the technical improvement of cables with complete urban power grids, we The original main power supply line can be used to modify the power supply line of the two T lines.
If you use this technology, we can increase the investment in the project and can be done as soon as possible. Third, the simulation and analysis of the fault circuit First, when the fault location is in the case, set the fault point at the D-section A phase, and perform simulation process test. Based on a stage of start-stage grounding: After the problem occurs, the current has a sustained transient process.
Then, slowly stabilizes and the fault is large, and the high value is 5A. At the same time, the non-fault phase amplitude has a large value of 1 A. There is no significant difference in the current wave detected by the normal ground wire.
Darting and fault routes of high-voltage cable fault positioning crossings, the attenuation amplitude of high frequency voltage will occur after the fault occurs. If the insulating layer in the cable is broken, we can measure the ground current size of different locations and the attenuation amplitude of the high frequency section voltage, and analyze the position of the cable accident from the measured data. Questions about high-voltage cable fault positioning today introduces you today, hoping to bring some help to people need.
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