Excessive resistance of the main circuit of the circuit breaker is a major problem in today's power system. As the core equipment of the power system, the circuit breaker has some errors in it, which may affect the operation of the power system. Therefore, we must pay great attention. Today, we will talk about the reason why the circuit breaker main circuit resistance exceeds the standard, and what is the solution.
As the control of the dispatcher and system of electric energy distribution in the power system, the circuit breaker is also the core operating equipment of the entire power system. And in the process of the main circuit resistance of the circuit breaker, the reliability energy and stability performance are directly related to the power supply form of the entire power system. At the same time, in the actual operation process, the form of electric energy distribution, power transmission, etc. should be highly valued, and conductive materials are used as the medium of transmission. In the process of over-standard analysis of the main circuit resistance of the circuit breaker, the material should have a certain resistance value, thus forming a good electromagnetic environment. At the same time, in the course of running, it has a certain complexity, and its function is relatively large. When the circuit breaker contacts, busbars are connected and installed, because the quality and level of installation are relatively low, the temperature is higher, which will lead to a large area of ​​power system, and even lead to safety accidents. . Therefore, in the process of continuous development of China's power system, the power industry should pay great attention to the cause of excessive resistance of the main circuit of the circuit breaker. Through effective means, the main circuit resistance of the circuit breaker is over-standard, which ensures the maximum degree. The safe and stable performance of the main circuit resistance of the circuit breaker ensures the normal operation of the main circuit resistance of the circuit breaker.
1. Analysis of the cause of excessive resistance of the main circuit of the circuit breaker
1.1 Data failure analysis
In the design process of the main circuit resistance of the circuit breaker, it should be calculated according to the capacity, rated current, short circuit, etc. of the system, and the results of the calculation should be verified, which can effectively improve the stability of the main circuit resistance of the circuit breaker. , security and other performance. However, in the case of actual operation, due to various factors, such as: manufacturing, contact design, installation and commissioning, and later maintenance, etc., this will lead to the occurrence of excessive resistance of the main circuit of the circuit breaker. Moreover, during the operation of the main circuit resistance of the circuit breaker, the temperature rise is too fast, which is the main cause of the problem of exceeding the standard. At the same time, during the repeated test of the main circuit of the circuit breaker, the phenomenon of excessive resistance is also a common phenomenon. At the same time, the difference between the resistance values ​​of the main circuit of the circuit breaker is relatively large. Under normal circumstances, the resistance value is about 97μΩ, which seriously affects The normal operation of the main circuit resistance of the circuit breaker.
1.2 The temperature of the main circuit resistance of the circuit breaker is correspondingly too high
(1) During the operation of the main circuit resistance of the circuit breaker, because the external load is relatively large, the operation time of the circuit breaker is relatively excessive to a certain extent, and the number of operations is relatively fast. The parts will be loosened to some extent, which often leads to important factors in the main circuit resistance of the circuit breaker.
(2) During the operation of the main circuit resistance of the circuit breaker, due to the relatively poor quality of the production, the design form also has shortcomings. In addition, during the operation of the main circuit resistance of the circuit breaker, the manufacturer is different, so there is a certain degree of difference in quality, which will cause a certain difference in the operating state of the main circuit resistance of the circuit breaker, and finally lead to the main circuit resistance of the circuit breaker. The reason for exceeding the standard occurs.
2. The processing form of the main circuit resistance of the circuit breaker exceeding the standard
2.1 Processing methods of data testing
According to the data surveyed in China, during the operation of the main circuit resistance of the circuit breaker, the problem of excessive resistance of the main circuit of the circuit breaker often occurs. Under such a background, the relevant staff should conduct a comprehensive inspection and analysis of its form, and comprehensively control and analyze the internal operating state of the main circuit resistance of the circuit breaker, so as to formulate a solution for exceeding the main circuit resistance of the circuit breaker. In the process, it played an important role and significance.
In fact, it can be seen from Table 1 that the B-phase and C-phase of the #3 and #4 spaced-line side circuit breakers have a certain problem that the main circuit resistance of the circuit breaker exceeds the standard. Therefore, in the process of over-standard treatment of the main circuit of the circuit breaker, the staff should comprehensively control and analyze the operating state of the main circuit resistance of the circuit breaker, and comprehensively calculate its value. Under normal circumstances, the value of the main circuit resistance of the circuit breaker can be within 151μΩ. Once it exceeds this range, the main circuit resistance of the circuit breaker will exceed the standard. Therefore, during the operation of the main circuit resistance of the circuit breaker, its value should be tested, and the operating state of the main circuit resistance of the circuit breaker should be fully controlled and analyzed. This not only ensures the normal operation of the main circuit resistance of the circuit breaker, but also avoids The phenomenon that the main circuit resistance of the circuit breaker exceeds the standard occurs, and the safety, stability and economy of the main circuit resistance of the circuit breaker are guaranteed to the greatest extent, which promotes the development of the power industry in China.
2.2 Circuit breaker main circuit processing form
During the operation of the main circuit resistance of the circuit breaker, the staff should conduct a comprehensive study and analysis on the state of its operation, so that it can effectively judge the form of the fault. At the same time, during the operation of the main circuit resistance of the circuit breaker, the staff should conduct a comprehensive inspection of the resistance loops of each part, and the loosening of the connecting parts should be handled in time to avoid the running performance of the main circuit resistance of the circuit breaker. This is reduced, which eventually leads to the phenomenon that the main circuit resistance of the circuit breaker exceeds the standard. In addition, during the operation of the main circuit resistance of the circuit breaker, the staff should conduct a comprehensive inspection and analysis of the quality of the internal parts of the main circuit resistance of the circuit breaker. For some parts with relatively poor quality and unqualified parts, the staff should be replaced in time. And comprehensively handle the dynamic and static contacts of the circuit breaker. At the same time, in the process of detecting the main circuit resistance of the circuit breaker, the staff can use the SF6 qi, micro water, leak detection, etc. to conduct a comprehensive test on the operating state of the main circuit resistance of the circuit breaker, as long as the relevant parameters reach the standard, can start normal work. In addition, during the operation of the main circuit resistance of the circuit breaker, the staff should check the internal running performance, and can maintain the balance state to the maximum extent, so that the decomposition and the way out of the main circuit resistance of the circuit breaker are corresponding. It provides convenient conditions, which improves the safe and stable performance of the main circuit resistance of the circuit breaker and ensures the normal operation state.
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