Most courses in electrical engineering and automation majors are highly practical, so only through internships can they learn more knowledge that they have not had much exposure to. Below I have compiled an internship summary report for the electrical engineering and automation major for you. I hope you like it. Internship Summary Report of Electrical Engineering and Automation Major 1
1: Internship time: January 4, 20XX - March 25, 20XX
2: Internship location: Xu Ji Power Supply Co., Ltd.
Three: Internship purpose:
The quality of the graduation internship is related to the quality of the graduation project. As one of the most important internships during college, we participate seriously. Through the last internship, students can further understand the production site, combine their studies at school with production, discover their own shortcomings, and review the knowledge they have learned. Make serious improvements during your graduation project to lay a solid foundation for rapid integration into work in the future.
Three: Internship company profile:
Graduation internship is the last and most important internship in our four-year university. It not only allows us to experience factory production, but also gives us a graduation internship Design offers a great opportunity, so we all take it very seriously. I have been looking forward to my internship. The school planned that my graduation internship would start in the second semester of my senior year, but since I had already signed a job, I started my internship life in advance.
This time my internship place is Xu Ji Power Co., Ltd., a subsidiary of Xu Ji Group. It was established in March 1994 and is one of the core subsidiaries of Xu Ji Group. At present, Xu Ji Group has 1 listed company, two industry-focused research institutes, two national product testing centers, and 8 Sino-foreign joint ventures. It is a large-scale backbone and leading enterprise in my country's power equipment industry. It is a nationally recognized 520 major technical equipment localization base, a national enterprise technology center, and an enterprise postdoctoral workstation. The products cover all aspects of the power system such as power generation, transmission, and distribution, and span the fields of primary and secondary equipment, AC and DC equipment.
Currently, Xu Jiyuan has more than 500 employees, including two with doctorate degrees, 23 with master's degrees, 132 with bachelor's degrees, and 168 with junior college degrees. 69 of the total number have a college degree or above. The main product areas of Xu Ji Power Supply Co., Ltd. cover electric power supplies, electric vehicle charging facilities, power quality control equipment and military special power supply products. Among them:
Electric power supply products: Electric power supply ranks first in the country in terms of market share in the electricity market. It mainly produces AC and DC power panels to provide stable and reliable operating power for power plants and substations. The main achievements that have been achieved include: 2*660mw units of Qinshan Nuclear Power Plant; Gaoling 500kv converter station of State Grid Corporation of China; Sanmenxia 500kv converter station of State Grid Corporation of China; 500kv Shenzhen converter station of China Southern Power Grid Corporation; digital substation of Shanghai Ultra High Voltage Bureau, etc.
Charging facility products: Electric vehicles are a key project in the country’s new energy field, and corresponding charging facilities have broad market prospects. Xu Ji Power participated in the construction of related products and charging stations in smart grids two years ago. project research and achieved gratifying results in this new field. Main achievements: Shanghai World Expo Park electric bus charging station - 9kw and 30kw off-board chargers; application demonstration of v2g technology in the World Expo smart grid - 30kw two-way charging and discharging device; Shanghai Caoxi Public *** Demonstration Charging Station - MW-level battery energy storage system 150kw bidirectional converter and 80kw off-board charger; Zhengzhou Nissan electric vehicle charging station - AC charging pile and 30kw off-board charger; Lanzhou charging station in Gansu, etc.
High-power products: The capacity of power quality control equipment is the largest in the country. The first industrial-grade 50mvar statcom in China was put into operation in the 220kv substation in the western suburbs of Shanghai in XX.
Military special products: The technology of military special power supply products has reached the international advanced level. Related products have been identified by the expert group of the China Academy of Engineering Physics and included in its strategic cooperation system to achieve batch supply. Main achievements: Shenguang-ⅲ multi-functional laser test system energy component contract; national 12th Five-Year Plan major technical project xenon lamp detection power supply; national 12th Five-Year Plan major technical project energy system engineering integration verification and testing; Chengdu Military Region The plateau mobile power supply vehicle project of the Institute of Engineering; the military detonator project of the Institute of Engineering of the Guangzhou Military Region, etc.
Four: Internship Process
On January 4, 20XX, I came to Xuchang. First, Wang Xulong from the General Management Department arranged a place for me to live. I was very excited when I met my classmates, and I was inexplicably moved. We live next door. In the afternoon, we went to apply for bank cards together and preliminary explored the surrounding environment. The next day, we started our internship career, and we were excited on the first day of work. The company arranged an internship process for us: one month of internship in production and four months of debugging. Internship Summary Report of Electrical Engineering and Automation Major Part 2
1. Foreword
At 1:30 pm on March 20, 2020, we visited Jiangdu Wujiang in Yangzhou One hundred thousand substations. This visit and study made me understand that the 500kV Jiangdu substation is the first 500kV substation in Jiangsu Province, the second in East China, and the eighth in the country. The infrastructure construction started on June 1, 1985 and ended on December 27, 1987. put into operation. Through this visit and study, I learned that the electric power industry is the most important basic energy industry in the development of the national economy. It is the first basic industry related to the national economy and people's livelihood and the national economy. It also made me familiar with power generation, transmission and distribution, electrical equipment and control equipment. Having a certain preliminary understanding and understanding of each link has added to our deeper understanding of this major, and we have benefited a lot.
II. Company Description
The 500KV Jiangdu Substation is located in the northern suburbs of Jiangdu City, Jiangsu Province, covering an area of ??160 acres. It is an important hub substation of the East China Power Grid. Jiangdu Substation is a key project of the Seventh Five-year Plan. It was built in 1985 and officially put into operation on December 27, 1987. In 1999, the second phase of the expansion project was successfully completed. Jiangdu Substation is an important substation connecting the north and south of the Yangtze River in the 500KV East China power grid. Jiangdu Substation Jiangdu Substation currently has three voltage levels. 500KV adopts 3/2 switch wiring method, 220KV adopts double busbar single segment with bypass wiring method, and 35KV adopts single busbar wiring method. The 500KV Jiangdu Substation is the chokepoint for East China Power Grid’s north-south power transmission and plays an indispensable role in the entire East China region.
The substation is a place in the power system where the voltage and current of electrical energy are transformed, concentrated and distributed. In order to ensure the quality of electric energy and the safety of equipment, voltage adjustment, power flow control, and protection of transmission and distribution lines and major electrical equipment are also required in the substation. According to their uses, they can be divided into power substations and traction substations (for electric railways and trams). Electric power substations are further divided into transmission substations, distribution substations and frequency conversion substations.
3. Internship content
1. Generation and transmission of electric energy
Thermal power generation system mainly consists of combustion system (with boiler as the core), steam and water system (mainly It consists of various pumps, feed water heaters, condensers, pipelines, water walls, etc.), electrical systems (mainly turbine generators, main transformers, etc.), control systems, etc. The first two generate high-temperature and high-pressure steam; the electrical system realizes the transformation from thermal energy and mechanical energy to electrical energy; the control system ensures the safe, reasonable and economical operation of each system.
To put it simply, it uses fuel (coal) to generate heat and heat water to form high-temperature and high-pressure superheated steam, which drives the turbine to rotate and the generator rotor (electromagnetic field) to rotate. The stator coil cuts the magnetic lines of force to emit electric energy, and then uses the step-up transformer to rise to The system voltage is connected to the grid and transmits electric energy to the outside. 2. Electrical equipment (1) High-voltage switch cabinet: The high-voltage switch cabinet is an electrical cabinet equipment used in the power system. The function of the high-voltage switchgear is to switch, control and protect the power system during the process of power generation, transmission, distribution and power conversion. The components in the high-voltage switch cabinet mainly include high-voltage circuit breakers, high-voltage isolation switches, high-voltage load switches, high-voltage operating mechanisms, etc.
(2) Low-voltage switchgear: power generation link: when the voltage changes from low voltage to high voltage, switchgear must be used to achieve high-voltage power transmission; power distribution link: when the voltage changes from high voltage to low voltage, low-voltage power consumption is achieved , a switch cabinet must also be used.
(3) Transformer: A transformer is a device that uses the principle of electromagnetic induction to change AC voltage. Its main components are primary coil, secondary coil and iron core (magnetic core). In electrical equipment and wireless circuits, it is often used to increase and decrease voltage, match impedance, safety isolation, etc.
(4) Steam turbine: A steam turbine is a rotating power machine that converts the energy of steam into mechanical work, also known as a steam turbine. It is mainly used as a prime mover for power generation. It can also directly drive various pumps, fans, compressors, ship propellers, etc. It can also use the exhaust steam or intermediate extraction steam of the steam turbine to meet the heating needs in production and life.
(5) Voltage and current transformer: The voltage transformer is a transformer with an iron core. It is mainly composed of primary and secondary coils, iron core and insulation. When a voltage U1 is applied to the primary winding, a magnetic flux is generated in the core. According to the law of electromagnetic induction, a secondary voltage U2 is generated in the secondary winding.
Current transformers play the role of current conversion and electrical isolation. It is convenient for secondary instrument measurement to convert it into a relatively uniform current and avoid the danger of directly measuring the line. The current transformer is a step-up (step-down) transformer. It is a sensor used by secondary equipment such as measuring instruments and relay protection in the power system to obtain electrical primary circuit current information. The current transformer converts high current into low current in proportion. The primary side of the transformer is connected to the primary system, and the secondary side is connected to measuring instruments, relay protection, etc.
3. Control equipment
(1) DCS control system
The DCS system (DIstributed Control System, distributed control system) is a modern large-scale industrial production automation The integrated control system has emerged with the continuous rise of the Internet and the increasingly complex process control requirements. It is developed and evolved on the basis of the centralized control system. It is a combination of computer technology, system control technology, network communication technology and multimedia technology. The combined product can provide a window-friendly human-machine interface and powerful communication functions, and is a modern device for completing process control and process management. Since DCS distributes system control functions on each computer, and the system structure adopts a fault-tolerant design, the failure of one computer will not cause the loss of other functions of the system. In addition, since each computer in the system has a relatively single task, special computers with specific structures and software can be used for the functions that need to be implemented, thereby improving the reliability of each computer in the system. Secondly, DCS adopts an open, standardized, modular and serialized design. Each computer in the system uses LAN to communicate to realize information transmission. When the system functions need to be changed or expanded, new computers can be easily connected to the system for communication. Network or removed from the network, almost does not affect the work of other computers in the system.
(2)PLC programmable controller
PLC mainly refers to the programmable logic controller of digital operation electronic system. It is used to control the production process of machinery. It is a specialized An electronic device for digital computing operations designed for use in industrial environments.
It uses a programmable memory to store instructions for performing operations such as logical operations, sequential operations, timing, counting, and arithmetic operations, and can control various types of equipment through digital or analog inputs and outputs. machinery or production process. PLC and its related peripheral equipment should be designed according to the principle of easy integration with the industrial control system and easy expansion of its functions.
IV. Feelings and Experiences
Through this internship, I understood and mastered the main structure of the substation, the electrical equipment and work processes used, as well as technical information for product production. , production organization and management, etc., to deepen our understanding of basic theories such as the working principle, design, and testing of substations, so that we can understand and master more knowledge related to this major. In this way, we understand the role of our major in society and clarify the direction of our efforts. In future studies, we should be more exposed to many fields such as power electronics technology, computer technology, electrical and motor technology, information and network control technology, mechatronics technology, etc. , and strive to become senior engineering technical talents with basic abilities to solve electrical engineering technical analysis and control problems after graduation.
V. Conclusions and Suggestions
During this internship, I deeply realized that as an electrical major student, the knowledge we learn cannot just stay in textbooks. Instead, we must continuously enhance our hands-on skills and accumulate experience during internships. The knowledge learned in textbooks must be applied in actual work and production, so I think we should use our spare time to get in touch with the society more and use all Learn knowledge and seek true knowledge through practice. At the same time, the rigorous and down-to-earth work style of power substations is worth learning. gt;gt;gt;Click the next page to read more about?Internship Summary Report of Electrical Engineering and Automation Major?