As the dispatcher and system control of electric energy distribution in the power system, the circuit breaker is also the core operating equipment of the entire power system. And during the operation of the main circuit resistance of the circuit breaker, the reliable performance and stable performance are directly related to the power supply form of the entire power system. At the same time, in actual operation, great attention should be paid to the distribution and transmission of electric energy, and conductive materials should be used as the transmission medium. In the process of analyzing the circuit breaker's main circuit resistance exceeding the standard, the material should have a certain resistance value to form a good electromagnetic environment. At the same time, it has a certain degree of complexity during operation, and its consumed functions are relatively large. When the circuit breaker contacts and busbars are connected and installed, due to the relatively low quality and level of the installation, a high temperature will lead to a large-scale paralysis of the power system, and even lead to safety accidents. . Therefore, in the process of the continuous development of China's power system, the power industry should pay great attention to the reason why the circuit breaker's main circuit resistance exceeds the standard. Through effective means, the circuit breaker's main circuit resistance should be dealt with to the greatest extent. 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 circuit breaker main circuit

1.1 Data failure analysis

In the circuit breaker main circuit resistance design process, calculations should be made according to the system capacity, rated current, short circuit, etc., and the calculated results should be verified, which can effectively improve the stability of the circuit breaker main circuit resistance during operation , Safety and other performance. However, in actual operation, due to various factors, such as manufacturing, contact design, installation and commissioning, post-maintenance, etc., this will cause the main circuit resistance of the circuit breaker to exceed the standard. Moreover, during the operation of the main circuit resistance of the circuit breaker, the excessive temperature rise is the main reason for the over-standard problem. At the same time, in the process of repeated testing of the main circuit of the circuit breaker, the phenomenon of resistance exceeding the standard is also a common phenomenon. At the same time, the resistance value difference between the main circuit of the circuit breaker is relatively large. In general, 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, due to the relatively large external load capacity, to a certain extent, the operation frequency of the circuit breaker will be relatively excessive, and the operation frequency of the circuit breaker will be relatively too fast. The parts of the circuit breaker will loose to a certain extent, which often causes the main circuit resistance of the circuit breaker to exceed the standard.

(2) During the operation of the main circuit resistance of the circuit breaker, due to its relatively poor production quality, there are also shortcomings in the design form. 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 ultimately lead to the main circuit resistance of the circuit breaker. The reason for exceeding the standard occurred.

2. Treatment form of circuit breaker main circuit resistance exceeding standard

2.1 Processing form of data test

According to the survey data in our country, during the operation of the main circuit resistance of the circuit breaker, the main circuit resistance of the circuit breaker often exceeds the standard. In this context, the relevant staff should conduct a comprehensive inspection and analysis of its form, and conduct a comprehensive control and analysis of the internal operating status of the circuit breaker's main circuit resistance, so as to formulate a solution for the circuit breaker's main circuit resistance exceeding the standard In the process, it played an important role and significance.

In fact, it can be seen from Table 1 that there are certain problems with the circuit breaker's main circuit resistance exceeding the standard for the B-phase and C-phase of the circuit-side circuit breakers #3 and #4. Therefore, in the process of processing the circuit breaker's main circuit resistance exceeding the standard, the staff should fully control and analyze the operating state of the circuit breaker's main circuit resistance, and perform a comprehensive calculation of its value. Under normal circumstances, the value of the circuit breaker's main circuit resistance is about 151μΩ. Once it exceeds this range, the circuit breaker's main circuit resistance will exceed the standard. Therefore, during the operation of the circuit breaker's main circuit resistance, its value should be tested, and the operating state of the circuit breaker's main circuit resistance should be fully controlled and analyzed. This not only ensures the normal operation of the circuit breaker's main circuit resistance, but also avoids The occurrence of excessive circuit breaker resistance in the main circuit also guarantees the safety, stability and economy of the circuit breaker's main circuit resistance to the greatest extent, and promotes the development of China's power industry.

2.2 Processing form of circuit breaker main circuit

During the operation of the main circuit resistance of the circuit breaker, the staff should conduct a comprehensive study and analysis of its operating state, so that it can effectively make a preliminary judgment on the form of its failure. 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 circuit of each part of the circuit breaker, and deal with the looseness of its connections in time to avoid the operational performance of the main circuit resistance of the circuit breaker. The reduction will eventually cause the circuit breaker's main circuit resistance to exceed 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 relatively poor quality and unqualified parts, the staff should replace them in time , And comprehensively handle the moving 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 SF6 gas supplement, micro water, leak detection, etc. to conduct a comprehensive test on the operating state of the main circuit resistance of the circuit breaker, and only wait until the relevant parameters reach the standard. normal work. In addition, during the operation of the circuit breaker's main circuit resistance, the staff should check the internal operating performance to keep it in a balanced state to the greatest extent, so that the decomposition and outlet of the circuit breaker's main circuit resistance are exceeded. 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.