The purpose and significance of the internship; \x0d\ Internship is to let us get in touch with the society as soon as possible, let us know about social work and our major during the internship, and then prepare for the future work. The school also arranged for us to go out for an internship, giving us a chance to test ourselves. Through practice, let us know our shortcomings and correct them. It has cultivated our practical ability and increased our work experience. Also let us learn a lot of things and knowledge that we can't learn in class. Let's lay the foundation for our future work. \x0d\ Practice is a kind of practice, an important link in integrating theory with practice, applying and consolidating the professional knowledge learned, and an important means to cultivate abilities and skills. Everyone knows that society is developing and technology is improving. Going out for internship is to encourage us to study harder in the future, and also to let ourselves know the gap between ourselves and those regular employees, know our own shortcomings, and then determine our future learning goals, so that we can go further. In the process of internship, we combine the theoretical knowledge learned in class with our work. In the process of internship, you can learn the difference between traditional craft and modern craft, and learn good work habits and styles, which will be of great help to your future work, so that you can live better, work better and continue to grow in a good environment after entering the society. \x0d\x0d\ Internship time: 2065438+July10,04 \ x0d \ x0d \ Internship location: our electric power system laboratory and motion control laboratory \ x0d \ Internship content: \ x0d \ Our class visited our electric power system laboratory and motion control laboratory. First, we visited the power system laboratory. In the laboratory, the teacher explained some knowledge about hydropower, thermal power, wind power and nuclear power. According to the laboratory equipment, the process and operation control of thermal power generation are explained, and the functions and processes of each thermal power generation operation control box in the laboratory are explained. Then I visited the simulation model of power distribution process and the model of control devices such as disconnectors in the laboratory, learned about the control and distribution of power after the power plant came out, and got a further understanding of the future discipline and work direction. In the motion control laboratory, we learned about the start, speed regulation and stop of the motor, and the speed regulation control of the motor is the focus of research. Motor speed regulation methods include: variable frequency speed regulation, pole-changing speed regulation and variable slip. Open the experimental electrical cabinet, and its core component is the frequency conversion box produced by Siemens with the strongest frequency conversion technology. Siemens' frequency conversion technology is used in many places that need to use frequency conversion technology in China. Finally, I visited the connection structure between the motor and other operation cabinet systems, and then ended this internship. \x0d\ Internship Time: 20 1 1, 2004 \x0d\x0d\ Internship Location: Lanzhou University of Technology Substation \ x0d \ Internship Content: \x0d\ x0d \ Our substation is on the first floor of our comprehensive experimental building. When the dedicated line fails, it can be powered by the standby line, but the load of the standby line can not meet the load requirements, so it is necessary to cut off the power supply of some lines. The school adopts 10KV transmission, which is distributed to each substation to convert 10KV into 0.4V power supply, which can reduce line loss and improve power supply quality. The master explained the working system to us. Every time they have a reclosing operation, the monitor gives the task. Now the computer simulates the reclosing operation process. If the computer simulation operation is correct, they can actually operate. In actual operation, the operator will be followed by two supervisors to ensure correct operation. The basic components of 10KV power supply line can be seen on the simulation system diagram: circuit breaker, disconnector, load switch, grounding switch, voltage transformer, current transformer, fuse, transformer, reactor, high voltage compensator, lightning arrester, bus and so on. \x0d\x0d\ Internship time: 2065438+July 2004 16 \x0d\ Internship location: China CNR Lanzhou Locomotive Co., Ltd. \x0d\ Internship introduction: \ x0d \ China CNR Lanzhou Locomotive Co., Ltd. is a wholly-owned subsidiary of China CNR Group Corporation, which was founded in/kloc- \x0d\ The company has more than 2,000 employees, including more than 700 senior and intermediate technicians and one senior mechanic; Total assets are 9 1 10,000 yuan; Covering an area of 538 1 1,000 square meters, and the workshop area is 1 1,600 square meters; The company has more than 2330 sets of various types of equipment. Including a certain number of high-precision, precision and heavy-duty equipment, with high-level physical and chemical measurement and detection means. The company's annual maintenance capacity is 400 locomotives. At present, the main types of maintenance are Dongfeng series diesel locomotives and Shaoshan series electric locomotives. The company has developed and manufactured 8-ton to 160-ton full hydraulic railway crane series products, 10-ton to 45-ton AC traction industrial and mining electric locomotive series products and railway rolling stock accessories, which can be widely used in railways, mines, coal mines, tunnels and other fields, and the products are exported to many countries and regions. The company has the national special qualification of steel structure, the D-level qualification of pressure vessel and the qualification of qualified supplier of electric power enterprise, and has the production capacity of new energy equipment manufacturing and large steel structure. The 1MW to 3MW wind power towers manufactured by this company are widely used in many wind farms in the west. \x0d\\x0d\ Internship content: \x0d\ This internship in Lanzhou Locomotive Works, we visited various workshops of locomotive repair in the Locomotive Works. These workshops mainly include motor workshop, accessory workshop, locomotive workshop and electrical workshop. Our major is to visit and understand the locomotive workshop and electrical workshop. Before the visit, the teacher told us that CNR Lanzhou Locomotive Works is a subsidiary of CNR Group, which mainly undertakes the maintenance and repair of locomotives. When the locomotive runs to 6.5438+0.2 million kilometers, it must be overhauled in the factory. Maintenance is also completed step by step, and each workshop in their factory undertakes different maintenance tasks respectively. Entering the workshop, we began to visit from the outside under the guidance of a teacher. First of all, we visited the motor workshop and watched the production of motor parts and the disassembly and assembly of the motor. Then we went to the parts workshop and visited the testing, processing and production of some locomotive parts. On the day of our internship, several trains came from all over the country for maintenance, and the teacher showed us around the locomotives. At this time, everyone is very excited, because taking the train is a common occurrence for everyone, but there are not many opportunities to visit motorcycles, so everyone cherishes this opportunity. We visited the interior of the locomotive and watched the wiring and installation of various parts of the locomotive. Finally, we entered the electrical workshop, where we can see the production and maintenance of the discrete components that make up the locomotive electrical system. The workshop is divided into two parts, one is the maintenance, production and processing of some large components in the locomotive electrical system; The other part is the maintenance and production of some locomotive electrical components and control switches. After visiting the locomotive, we visited the workshop to repair the train skeleton, and then ended this internship. \x0d\x0d\ internship time: 2065438+July 2004 16 \x0d\ internship location: gongjiawan substation \x0d\ internship content: \ x0d \ gongjiawan substation has been playing an important role in the development history of Lanzhou power grid and even Gansu power grid, and it is the southern part of Lanzhou city. In the past 40 years, it has made great contributions to the safe and stable operation of Lanzhou power grid and the sustainable development of Lanzhou economy. With the completion and operation of 330kV Pengjiaping Substation and the gradual "π" operation of Gong Liu three-circuit line, 220kV Gongjiawan Substation has met the conditions of step-down operation. On June165438+1October 10, Gongliu Line Ⅲ was opened to Pengjiaping Substation of 330kV, forming Liu Peng Line Ⅲ and Gong Peng Line Ⅲ, which officially kicked off the step-down operation of Gongjiawan Substation. After the step-down operation, the 330 kV Pengjiaping substation will replace Gongjiawan and become the main power support point in the southern part of Lanzhou. \x0d\ Because this internship is in a substation, which is under construction, there are many potential safety hazards, so we have taken preventive measures. Under the teacher's explanation and guidance, we got to know the real 1 10kv large transformers, circuit breakers, buses, disconnectors, current transformers, voltage transformers, insulator strings and other physical objects and their operation methods. According to the teacher's introduction, we know that the circuit breaker used in Gongjiawan Substation is an old-fashioned manual circuit breaker, and the disconnector is a device for eliminating arc, with observable windows and instruments. The structure of current transformer and voltage transformer is similar, and we also know the voltage inspection and measurement after disconnecting switch. Finally, we saw a newly added large 220kv step-down transformer, and then ended this understanding exercise. \x0d\x0d\ Internship time: 2065438+July 2004 17 \x0d\ Internship location: Lanzhou Electric Machinery Co., Ltd. \x0d\ Company Profile: \ x0d \ Lanzhou Electric Machinery Co., Ltd. (hereinafter referred to as "the company") is the basis of the original "Lanzhou Electric Machinery Factory". \x0d\ Company's main products: 0.30~3MW wind turbines, MW wind turbines, 220 ~ 20000 kW large and medium-sized high-voltage AC motors, 0.55~2000kW small and medium-sized low-voltage AC motors, 0.55~5000kW AC variable frequency motors, 3 ~ 5000 kW marine and land-based alternators, and 65438+. Small and medium-sized hydro-generator set 160 ~ 40000 kW, mobile (fixed) power station, generator set, power supply vehicle, low-noise automation set 12 ~ 1200 kW. The annual comprehensive production capacity is 5 million kilowatts. Among them, the production scale of special military motors such as \x0d\ marine and land alternators, intermediate frequency, dual frequency and double current, AC servo, spindle and stepping motor, YJS high-efficiency and energy-saving motor ranks among the top in China. \x0d\ Internship Content: \x0d\ Lanzhou Electric Machinery Factory has a long history. The workshop and most of the equipment are left over from the 1980s, which has a sense of historical vicissitudes and witnessed the development of China's industry. As the largest manufacturer of motors and power generation equipment in the northwest of China, Lanzhou Electric Machinery Factory has experienced ups and downs. Under the guidance of the master, we went to more than ten workshops. In the motor assembly workshop, the masters in the workshop are assembling the motor parts into semi-finished motors. Here, for the first time, we saw the motor parts that we learned from books but were not familiar with, which made us know more about the motor. In the motor finishing workshop, the main task of this workshop is to finish the semi-finished motor, check the stability of the motor through high voltage, and finally paint it before leaving the factory. Here you can see all the jobs that metalworking students have learned during their internship. There are many finished motors in this workshop, including small and medium-sized motors. The generator metalworking workshop is responsible for the manufacture, processing and assembly of generator components. The foundry master is very interested in his work. They deal with sand all day. They pour sand into existing molds, and then pour molten aluminum into them to cast all kinds of desired parts. From the foundry, we can see a big machine, whose function is to clean the sand on the surface of the casting. In other workshops, we can see the silvery metallic luster of rusty iron and the temperament honed by old workers' years of work. In the workshop, winding and putting insulating paper are all made by hand, which has an intuitive traditional aesthetic feeling, especially in the casting workshop of wood mold and aluminum mold. There are many motor casings on both sides of the road in the last few workshops. The master told us that this is to let the motor experience the wind and rain of nature to remove its internal stress. After coming out of this workshop, we have finished this comprehension exercise. \x0d\ Internship and Experience Summary: \x0d\ Through this internship, I saw what I had learned in the textbook but didn't actually see it, and I also learned what I couldn't learn in the textbook. I went to various units for internship, which made me deeply realize the significance of transforming theory into practice. What we learn in books is dead. In practice, we will encounter complex problems that are not involved in various books, which requires us to keep learning in practice and combine what we have learned with practice to form the ability to solve these problems. This internship really made us gain a lot and made us look forward to the future. In college, we should pay attention to cultivating our creativity, not just learning a little knowledge from textbooks, but also developing in an all-round way. In the process of this internship, I deeply realized that after leaving school, our immaturity and deficiency in work experience, social experience, interpersonal communication, etc. were completely revealed in this internship, and what we lacked was not only that, so in my future life and work, I will continue to enrich and enrich myself, don't give up any opportunity to exercise myself, and I must study and work hard to make myself better. \x0d\ electrical automation level 4 \x0d\ Gao Bin \ x0d \ 2065438+July 65438, 2004+July 7, 2004