Practical method for fault location of distribution lines

The power supply system is the key to ensure normal and safe power supply, but the power supply system will be affected by a series of factors, such as geographical environment factors, natural conditions and human-induced damage factors, which will cause the distribution line to cause failure and further make the distribution line. The reliability and safety of the operation are affected. Under such circumstances, it is necessary to grasp the method of fault location of the distribution line. However, some conventional methods are insufficient. In view of this, this topic has a certain value for the analysis of the "practical method of distribution line fault location".

I. Analysis of the missing points of the fault location technology of conventional distribution lines

For the fault of distribution line, the conventional positioning technology is mainly embodied in two aspects. On the one hand, the corresponding positioning work is completed in combination with work experience, and on the other hand, the segmentation detection measures are adopted for the distribution line. However, there are certain shortcomings in these two technologies. The specific performance is as follows:

(1) Completing the corresponding positioning based on work experience

In the traditional mode, in the process of repairing the fault of the distribution line, the experienced staff often participate in the work, combined with the actual working conditions of the circuit, complete the analysis and judgment of the distribution line fault, and further check the suspicious fault point. For this kind of strategy, the testing workers who need to participate in the work have a wealth of professional skills and experience, and need to consume large human resources and material resources, such as collecting and reviewing fault data, obviously this does not meet the test. Economic requirements. At the same time, such methods are usually only able to establish the scope of the fault, but it is difficult to clearly locate the fault point, especially in a complex geological environment, which will be affected by factors such as climate, and then the point of failure Determine the wrong situation.

(2) Adopting segmentation detection for distribution lines

The principle of segmentation detection of distribution lines is as follows: segmentation measures are implemented for circuits in a certain range, and disconnection and closing operations are further taken for this segment of the circuit to further judge whether there is any failure of the distribution line. Such measures are also large in the consumption of manpower and material resources, making it difficult to effectively carry out the fault location of distribution lines. Moreover, under the influence of natural glare during the fault inspection process, it may be difficult to find out the ground fault of the circuit in time, which may cause the operator to cause personal safety risk risks.

Second, the practical method analysis of fault location of distribution lines

In the above analysis process, it is recognized that there are many shortcomings in the conventional distribution line fault location technology. Therefore, it is necessary to master the advanced and scientific method of fault location of distribution lines. The following is an analysis of the application of high-speed real-time fault location system and segmentation positioning technology under the current situation. The specific technical contents are as follows:

(1) Application of real-time fault location system

The real-time fault location system is based on electronic information technology and network technology, and then constructs an effective monitoring system to play a role in the distribution line. From the current point of view, the real-time fault location system is the main practical fault location in the distribution line. Applications are mainly reflected in the following three aspects:

(1) Distribution line diagnosis. The main components of the monitoring system include: sensing devices, receiving signal devices, computers, and corresponding software control programs. Under the condition of reasonable application of the system, the working state of the distribution line can be presented in real time in the computer equipment, and the receiving signal device receives the fault signal fed back from the distribution line, and further installs the software through the computer to the fault signal. The type is intelligently analyzed, and the distribution line is faulty by the color change of the corresponding indicator. In this way, the relevant fault repair staff can take effective maintenance measures for the faulty circuit.

(2) Fault circuit analysis. Based on the faulty circuit, the reasonable application of the monitoring system can effectively ensure the accuracy of the fault location of the power supply line. The principle is: under the condition that the distribution line causes a fault, the computer analyzes the corresponding data in detail, and then judges the distribution line to see if there is a ground fault. If there is a ground fault in the distribution line, the current in the circuit will increase to a large extent, and for the monitoring system, the distribution line can be monitored in real time to further locate the fault point; if the distribution line occurs In the event of a short circuit, the circuit can be powered down in an automatic manner, causing the amount of current in the distribution line to change to "0" and then feeding back the corresponding circuit information. In general, the rational application of this technology can effectively determine the ground fault and short circuit fault, and then eliminate the fault to ensure the reliability and stability of the circuit.

(2) Current fault location method

The current fault location method refers to the application of the current method to accurately locate the fault of the distribution line. In the process of adopting the circuit fault location method, it is necessary to indicate the support of the system and the signal receiving device. When the distribution line is short-circuited, the signal receiving device can feedback the collected signal to the computer system, further analyze the corresponding software in the computer, and then clear the fault location to clear the fault. After the point, take power-off measures for some of the faulty lines. For such methods, the line fault can be accurately located, and at the same time, the development of the distribution line fault can be suppressed, thereby ensuring the reliability and safety of the power line operation.

(III) Current injection fault location method

If the distribution line fails, a special current signal is issued. Therefore, the position of such a signal can be analyzed to further accurately locate the fault point of the distribution line. To sum up, there are two types of current injection fault location methods, including: (1) based on the branches of the distribution line, the corresponding signal receiving device is installed, so that the accuracy of circuit fault location is effectively guaranteed and The distribution line can realize segmentation control; (2) based on the fault detection process, the relevant distribution line maintenance staff uses the signal detector to complete the establishment of the circuit failure point; since the electrical signal has continuity characteristics, once the signal is detected If the signal is found to disappear, it can be determined that the circuit is faulty. By adopting such a method, the accuracy of fault location can be effectively improved, and the workload of the staff can be reduced, thereby further ensuring the safety of the operation.

Third, the conclusion

Through the exploration of this paper, it is recognized that the traditional distribution line fault location method is insufficient. Therefore, it is necessary to pay attention to the application of real-time fault location system, current fault location method and current injection fault location method in distribution line fault location. It is believed that the accuracy and scientific application of the above method can effectively ensure the accuracy of fault location of the distribution line, and further lay a solid foundation for the safety and reliability of the fault location operation of the distribution line.