On Fault Location Of Power Cable Traveling Wave Based On Mathematical Morphology Research

With the increase of electricity consumption, in the form of electric power enterprises have to expand the scale of power grid to respond to the market changes. The long of the cable operation also can cause loss of cable itself, increased the incidence of failure. But, most of power cable buried in the ground, is a special kind of transmission line, want to directly observed the fault location is extremely inconvenient. If difficult to quickly to clear of cable of the failure of location, it will delay the time of renovation, and extend the power of time. Conceivable, electricity enterprises and home users will be affected by a certain degree. To this end, the failure of cable location for rapid, accurate and efficient positioning, it is very important.Existing power cable fault location method is not perfect, good at Bob detection and identification using more successful algorithm is traveling wave signal wavelet were collected to change for the modulus maxima algorithm, taking advantage of the amount of the calculation method for power system mutation operation, to meet the reach a certain width of the window of the collected data. At the same time, after changing the integral, will affect the input signal, and cause the signal phase distortion, reduce the signal amplitude. In the end, the ability to work will not be able to accurately identify the properties of the signal, even if the detected signal, the error of the results is also very big, can’t meet the high precision of target. From the calculation itself, this algorithm is not simple. In the fault location, will delay the processing time, traveling wave signal is difficult to realize on-line monitoring the fault cable. Therefore, in order to realize the online fault location precision, by the good, streamlined algorithm is required to provide technical support.In this article, discusses the disadvantages of wavelet transform algorithm, and that can make use of mathematical morphology to meet the requirements of the troubleshooting work. To this end, the specific in-depth analysis of the mathematical morphology in effect on the identification signal, and the actual quality of filter were analyzed. Considering the need of cable online troubleshooting, positioning, on the basis of mathematical morphology, build in addition to the simulation platform, the platform can simulating the actual working condition of cable, and through the positioning of the simulation signal to realize the fault position clear. In addition, this article also compares the method of wavelet transform and mathematical morphology method in calculation methods, steps, according to the principle, conclude that many of the advantages of mathematical morphology, in cable used in troubleshooting, positioning mathematical morphological method, can realize high accuracy of fault location clear, the calculation process of concise also provides a lot of help.