20 days before the written examination for the second batch of electrician recruitment in 2020, what knowledge points should you focus on reviewing?

Twenty days may pass through our fingers in an instant, and may leave only a faint trace in the long river of memory, but to some extent it may affect our lives. , so we have no reason to slack off in the final sprint. This is the final sprint of the marathon, the last step of the long march, the final push to the top, the last hurdle on the road to success, and we have to go all out every second.

The foundation of electrical engineering technology is relatively basic. I believe that all students must have a solid understanding of the various analysis methods of circuits, the characteristics of various components, and the review of alternating current. For new power electronics technologies, focus on mastering various The structure, principle, characteristics and related parameters of three kinds of electronic devices, as well as the principles of four converter technologies are enough. For the relatively difficult motor part, just focus on learning the structure, principles and operating characteristics of various motors. There is no need to learn overly complicated content. Next is the main event, power system analysis. You must master the basic concepts, focus on mastering the mathematical models of each component of the power system, and then analyze the hand-calculated power flow. Calculating the power flow mainly grasps the conclusion, and can use the symmetric component method to analyze asymmetric faults. Finally, Static stability analysis and transient stability analysis of electromechanical transients. There are also the guards of the power system. The focus of relay protection is on the first four chapters, which take up a large proportion of the exam. You must master various protection principles such as current protection, distance protection, and longitudinal protection.

Finally, there are two relatively more basic concepts of high-voltage technology and electrical equipment and main systems. Know the main types and functions of primary equipment. The key point is to compare and organize different equipment with each other. , in this way, we can better highlight the error-prone points. High voltage is abstract and has many concepts. It pays attention to the explanation of proper nouns, the analysis of the results of high voltage tests, the types of overvoltage and how to prevent overvoltage.

Students, we are afraid of seriousness in this world. As long as we are serious and true, the final result will definitely not be bad. All difficulties can be solved and we can realize our dream of national network and finally realize it. own goal.