Department: School of Electrical Engineering
Grade: electrical grade 0704
May 23, 2065 438+00
First, the purpose of internship
The purpose of practice is to integrate theory with practice, understand the composition and operation management of substation, deepen the understanding of electrical appliances in power system such as circuit breakers and switchgear, cultivate students' ability to analyze and solve problems, and cultivate students' understanding and interest in power system.
Second, the internship content
Visit Dalian University of Technology Center Substation
Third, the internship process.
Visit the central substation of Dalian University of Technology on the afternoon of 201May 17 1: 30, and learn about the composition of the central substation, online monitoring software management, substation high-voltage distribution cabinets, low-voltage distribution cabinets, and electrical equipment such as transformers 10/0.4.
Fourth, the harvest and experience of internship
1. Composition of Dalian University of Technology Substation
Dalian University of Technology adopts double power supply 10kv cable, one of which is a special line with 8300KV A capacity and the other is a standby line with 3000 kV a capacity ... The maximum load of Dalian University of Technology is 7600KV A throughout the year, probably in winter, mainly due to the increase of heating load in winter; The summer load is 4000-5000KVA. When the dedicated line fails, it can be powered by the standby line, but the capacity of the standby line can not meet the load requirements, so it is necessary to cut off the power supply of some lines to meet the necessary load. The school adopts 10KV transmission, which is distributed to all substations, and converts 10KV into 0.4KV power supply, which can reduce line loss and improve power supply quality.
On the simulation system of Dalian University of Technology substation, we can know the basic components of 10KV power supply line: circuit breaker, disconnector, load switch, grounding switch, voltage transformer, current transformer, fuse, transformer, reactor, high voltage compensator, lightning arrester, bus and so on. Let me explain in detail my understanding of the above electrical appliances.
Circuit breaker: under normal circumstances, it controls the opening and closing of various power lines and equipment, and automatically cuts off the short-circuit current of the power system when the power system fails to ensure the normal operation of the power system. In this practice, the school used 10KV vacuum circuit breaker.
Load switch: Load switch is an electrical appliance between circuit breaker and disconnector, and it is an arc extinguishing device. Under normal circumstances, it controls the on-off of various power lines and equipment. But it can't cut off short-circuit current. The load switch and fuse together can realize the function of general circuit breaker.
Disconnector: Disconnector is a kind of high-voltage switchgear. Structurally, the disconnector has no special arc extinguishing device, so it cannot be used to close the load current and short-circuit current. When normally separated, there is a visible insulation distance between the two ends of the disconnector that meets the safety requirements. In the power grid, its main uses are as follows: ① When the equipment is overhauled, the live and dead parts are isolated by isolating switches to form obvious breakpoints to ensure the safety of workers and equipment; (2) The operation of isolating switch, circuit breaker and switch can change the operation mode of system wiring. As long as its function is electrical insulation.
Fuse: When the line load current exceeds a certain value or a short circuit fault occurs, it can automatically disconnect the circuit. Only after replacing the fuse can it be used again.
Grounding switch: it is used for grounding when overhauling electrical equipment of high-voltage lines to ensure personal safety, and also used for grounding protection of power system caused by artificial grounding for control and protection.
Voltage transformer: As a voltage conversion device, voltage transformer is connected between high voltage and zero line to convert high voltage into working voltage of various equipment and instruments; The main uses of voltage transformer are: ① Power supply settlement, which requires accuracy to 0.2 level, but the output capacity is not large; (2) As a film signal source for relay protection, the accuracy level is generally 0.5 and 3p, and the output capacity is generally large; (3) When used for closing or reclosing inspection, there is no pressure signal.
Current transformer: Current transformer is a special transformer specially used for converting current. The primary winding of the current transformer is connected in series in the power line, and the current in the line is the primary current of the transformer. The secondary winding is connected with measuring instruments and protective devices, and is the load of the secondary winding. The rated output current of the secondary winding is generally 5A.
Lightning arrester: it is a device to protect electrical equipment from lightning shock wave in substation, which is used to limit overvoltage. When the lightning shock wave enters the substation along the line and exceeds the protection level of the lightning arrester, the lightning arrester discharges first to limit the lightning voltage amplitude below the lightning shock level of the protected equipment, thus protecting the electrical equipment.
Reactor: used to limit short-circuit current in case of fault, and can also be used for reactive power compensation and filtering.
High voltage compensator: compensate inductive reactive power and improve power factor. The system mainly compensates on the low voltage side to reduce the line loss.
Transformer: This substation uses 10/0.4 transformer to supply power to low-voltage load.
At first, I thought the simulation system of the central substation didn't have much effect. After the teacher's explanation, I realized that the simulation system can simulate the actual operation to check whether the operation ticket is correct. When the teacher simulated the operation, we realized that when the power was cut off, we should turn off the circuit breaker first, and then turn off the disconnector. When electrifying, close the isolating switch first, and then close the circuit breaker. In addition, in the low-voltage ring network composed of science park and gymnasium, ring power is adopted to improve the reliability of power supply.
2. Monitoring software
This substation adopts Korean KD monitoring software and equipment, which can get the load power and power factor at every moment. For example, during the visit, the active power was 4. 18MW, the reactive power was 0.5Mvar, and the power factor was 0.99. It can also generate daily load curve and send out alarm signal.
The low-voltage monitoring software is developed by School of Telecommunications, Dalian University of Technology, which can monitor the voltage, frequency, active power, reactive power and power factor of the low-voltage side of the substation.
3. High-voltage distribution cabinet room
The high-voltage power distribution cabinet room has a voltage level of 10kv and is sent to each substation respectively. The high voltage distribution cabinet consists of voltage and current detection, 10kv vacuum circuit breaker, disconnector, etc. Each transmission line has its own distribution cabinet, and the current, voltage, active power and reactive power are displayed on the distribution cabinet. In the high-voltage distribution cabinet room, we got the on-off state of the vacuum circuit breaker and got a general understanding of the composition of the high-voltage distribution cabinet.
4. Low-voltage distribution cabinet room
In the low-voltage distribution cabinet near the central substation, we can see the distribution cabinet prepared for each building in the low-voltage distribution room, which contains low-voltage reactive power compensation cabinets and capacitors. Reactive power can be compensated by the number of capacitors put into the power grid, and the compensation size and method can be set, which is explained. When I saw the low-voltage compensation cabinet, it took some time to compensate for the switching of eight capacitors, so as to fully discharge them and prevent the capacitors from being broken down because the voltage was twice as high when they were put into operation again.
5. Transformer
I was very excited when I was in close contact with the oil transformer. I am not afraid when I stand beside the transformer. Through the teacher's explanation, we will distinguish between high voltage side and low voltage side. The side with insulation column is the high voltage side, and the tap is on the high voltage side. With three taps, 10.5/0.4,10.4, 9.5/0.4 can be realized respectively, because the high-voltage coil is on the outside in general transformer manufacturing, and it is easy to change the number of coil turns. You can use 10.5/0.4 at peak load and 9.5/0.4 at low load. The power supply must be disconnected when changing the tap, because the transformer used here can't run with load. In addition, the reason why the low-voltage side connecting bus is directly connected with soft copper wire instead of steel plate is because the direct connection with steel plate will cause great damage to the transformer due to electrodynamic force and thermal effect.
Internship experience
1. Through this internship, I learned about the composition of the substation, broadened my horizons, deepened my understanding of electrical equipment such as circuit breakers, disconnectors, load switches, grounding switches, voltage transformers, current transformers, fuses, transformers, reactors, high-voltage compensators, lightning arresters, buses, etc., and understood the principle and importance of substation detection. Understand the layout of control panel, protection panel and the overall layout of main control room, understand the work of substation staff, and enhance the recognition ability of electrical drawings. As an electrical worker, at least know the electrical system diagram, floor plan and wiring diagram, which points out the direction for future study and lays a good foundation for future work.
I got an opportunity to integrate theory with practice and deepened my understanding of theoretical knowledge. For example, the main electrical wiring mode and centralized power supply mode are studied in architecture class. The double power supply here refers to one main power supply and one standby power supply, and the ring network power supply can improve the reliability of power supply. Electrical appliances, such as transformers, circuit breakers, load switches and disconnectors. From textbooks to practice, deepen the understanding of theoretical knowledge. For example, the difference between circuit breakers and load switches, and the understanding of transformer taps. The control in the distribution cabinet is mostly relay control. Why not use single chip microcomputer or PLC control is to improve the reliability of the system.
The insulation and discharge prevention of electrical equipment mentioned in high voltage technology is still very useful to realize high voltage by seeing the insulation bushing on the transformer, which provides power for future study.
3. Improve safety awareness. Working in a substation, safety is the most important thing. At the beginning of this internship, I was a little scared in the high-voltage distribution room, but with the teacher's explanation, I was not so scared. We should improve our safety awareness and operate according to safety standards, because once an accident happens, it will do harm to personal safety, always remind ourselves to pay attention to safety, be bold and cautious, and put safety first.
4. Cultivate the ability to find, analyze and solve problems. No matter in work or study, don't let go of any small problem, especially the staff engaged in the power industry. To understand the fault, you need to have the ability to find the problem, which of course requires profound knowledge and rich experience. Only by solving the problem can power supply be restored and people's production and living needs be met.
5. My shortcomings and aspects that need to be improved. At present, most students have little contact with reality, and traditional laboratory experiments are an ideal environment. Most of the courses are theoretical knowledge, and there are too few opportunities to apply what they have learned. That's what I am. I should study hard theoretical knowledge, and at the same time, actively participate in internship activities to increase my hands-on ability, problem analysis, problem solving ability and innovation ability.
Problems encountered by verbs (abbreviation of verb) and suggested solutions
1. The spare capacity of two 10kv power supplies is insufficient?
All the way is a special line with a capacity of 8300KV A, and all the way is a backup line with a capacity of 3000 kV A. The maximum load of Dalian University of Technology is 7600KV A throughout the year, probably in winter, mainly because the heating load increases in winter; The summer load is 4000-5000KVA. When the dedicated line fails, the spare line capacity is insufficient, and the spare line capacity can be increased to 8300KVA. This requires capital investment.
2. What is the difference between a load switch and a circuit breaker?
Circuit breakers are used to make and break normal or fault currents, and can meet the requirements of automatic reclosing in case of short circuit fault; Under normal circumstances, the load switch can only close and disconnect the circuit, and cannot disconnect the short-circuit current. Short-circuit protection can be realized when the fuse is used, but it can only work normally after the fuse is replaced.
3. The problem of energy saving and emission reduction?
Seeing from the monitoring software that the load is not low at night, the person in charge of the substation said that they thought it was a waste of electricity caused by computer standby at night. I agree with this, but I can't believe the loss of 700KVA. In any case, we should form a good habit of saving energy and reducing emissions in our life.
4. The problem of reactive power compensation?
The reactive power compensation of school substation adopts centralized compensation on the low voltage side of substation, which has also achieved good results, and the overall power factor is 0.99. On the low-voltage side, the switching of compensation capacitor is convenient and easy to control, and the life of contactor and low-voltage circuit breaker is longer. If the high-voltage bus is compensated, the voltage is high, the control cost is high, and the life of the high-voltage circuit breaker is limited, so the high-voltage compensation is not used here, but the low-voltage compensation is used. Of course, when the power factor is too low, high voltage compensation can also be put into use.
5. Coordination of protective equipment?
When multiple protection appliances are connected in series in the line, in order to meet the requirements of selectivity, not only the action current of the upper and lower protection appliances should meet the requirements of classified protection, but also the action time should meet the requirements of classified protection. At the same time, the superior protection device should also play a backup protection role for the lower protection device. I remember when I was internship, the teacher mentioned that sometimes our school broke down and the protection at the same level didn't act, so the protection appliances of the power supply bureau acted, that is, they ran beyond the level. This is because the superior protection appliance adopts electronic protection appliance, which has short action time and sensitive response, which is beneficial to protect the power grid to the maximum extent. But it is inconvenient to supply power at lower levels. So be sure to cooperate with protective equipment.
6. Low voltage distribution three-phase balance?
I once asked the building automation teacher this question. The traditional three-phase balance of low-voltage distribution adopts the method of average load distribution, so when the load is very random, it is difficult to achieve three-phase balance, which further causes current to flow in the neutral line, resulting in loss and affecting the quality of power supply. If some measures are taken to achieve three-phase balance, the problems of loss and power supply quality will be solved.
Firstly, a certain mathematical control algorithm is adopted to realize the balance of three-phase current in a larger system.
The second scheme is realized by monitoring and automatic switching device. By monitoring the distribution of current in three phases, the switching devices are controlled to achieve three-phase balance.
7. Why is the total transformer capacity far greater than the load capacity?
According to the teacher, the maximum load of substation in our school is 7600KVA, and the total capacity of transformer is 15000KVA, which far exceeds the load capacity and increases the cost of electrical equipment. Because there are many uncertain loads and random loads in the school. If the load can be effectively distributed, the capacity of transformer installation can be reduced and the investment cost can be reduced.
8. How to detect cable leakage and its location?
Nowadays, more and more power cables are used. Cable power supply has many advantages, such as: generally buried in soil or laid indoors, in ditches and tunnels, the insulation distance between lines is small, there is no need for iron towers, and it takes up less ground space. Advantages of power cable: 2. Less affected by climate conditions and surrounding environment, stable transmission performance and high reliability. 3. More favorable conditions for ultra-high pressure and large capacity development, such as low temperature. However, cable power supply faults, especially leakage faults, are difficult to find. Through consulting the information, I learned the common methods.
Scheme 1: A new cable leakage fault point detector.
This device adopts the principle of DC voltage division to measure the cable leakage fault point, and the schematic diagram is as follows:
Set a three-core cable, the length of the core is L, the cross-sectional area product is S, the conductivity of the conductor is V, and the resistance of the core is R.
( 1)
Short-circuit the end of the core wire, apply the voltage u to the head end, and then:
(2)
The voltage I at both ends of the U-2 core wire is obtained by substituting (2) into (1) by the current of 1 core wire.
(3)
Ux represents the voltage from the head end of the core to the fault point. The distance from point A to the head end is 1:, similarly;
(4)
By the ratio of formula (4) and formula (3)
Adjust the voltage applied at both ends of 1 2 core wire to make the reading of u1000 mv and millivoltmeter be lx%. Knowing the total length of the cable, we can find out the distance of the fault point A.
This method is only applicable to
Scheme 2: Quick detection method for leakage phenomenon of directly buried cables.
This paper introduces the method of quickly and accurately determining the leakage position by using ZC-8 grounding resistance tester.
Working principle ZC-8 grounding resistance tester is made according to the principle of compensation method, with manual alternator as power supply, and its working principle is shown in figure 1. In figure 1a, TA is current transformer, f is manual alternator, z is mechanical rectifier or phase-sensitive rectifier amplifier, s is range switch, g is galvanometer and Rs is potentiometer. The instrument has three grounding terminal buttons, namely, grounding terminal button E (terminal button E is short-circuited by potential auxiliary terminal button P2 and current auxiliary terminal button C2 inside the instrument), potential terminal button Py and current terminal button C.. Each end button is inserted into the ground for a specified distance through the probe, and the soil resistance between the two end buttons E and P is measured. In order to expand the measurement range, two groups of different shunt resistors, R 1~R3 and R5~R8, are connected in the circuit to block and shunt the secondary current I2 of the current transformer and galvanometer branch. The shunt resistance is switched by the gear switch S. The gear switch S has three gears, namely 0ω~ 1ω, 1ω~ 10ω and 10ω.
Internship report
Department: School of Electrical Engineering
Grade: electrical grade 0704
Name: Ge Guowei
Student number: 200785037
20 10 July 17
First, the purpose of internship
The purpose of practice is to integrate theory with practice, understand the composition and operation management of power plants, deepen the understanding of electrical appliances such as circuit breakers and switchgear in power system, increase students' understanding of motor manufacturing, understand the process of motor production, broaden students' horizons, cultivate students' ability to analyze and solve problems, and cultivate students' understanding and interest in power system.
Second, the internship content
Visit Huaneng Dalian Power Plant and Dalian Electric Machine Factory.
Third, the internship process.
On the morning of July 6th, 20 10, I visited Huaneng Power Plant under the leadership of Mr. Liao and Mr. Dong. Xiao Gong, the person in charge of the power plant, introduced the basic situation of the power plant and gave a brief safety education, which benefited a lot. Then, led by Xiao Gong and Zhang Gong, we visited the electrical control room and workshop of the power plant.
20 10, on the morning of July 8, under the leadership of Mr. Dong, we visited Dalian Electric Machine Factory. The person in charge of the motor factory led us to visit the motor workshop and gradually learned about all aspects of motor production.
Fourth, the harvest and experience of internship
(1) Harvest of Huaneng Power Plant
1. Understand the basic situation of Huaneng Power Plant.
Huaneng Dalian Power Plant has a total installed capacity of 6.5438+0.4 million kilowatts * * There are four thermal power units with a single unit capacity of 350,000 kilowatts. In the first phase, two 350,000-kilowatt units imported from Mitsubishi Corporation of Japan were installed, and in the second phase, two units of the same type were imported from Britain and the United States. The two units were officially put into operation at 1988 and 1998 respectively, and most of the coal needed was transported from Shanxi or Inner Mongolia, which was a long way and had high freight charges. However, Huaneng Dalian Power Plant still has its own advantages, for example, it plays a vital role in ensuring the reliability of power supply in Dalian and its nearby areas. On March 4, 2007, Huaneng Dalian Power Plant experienced the most severe test in history in the face of a rare snowstorm and freezing rain. As the backbone power plant in Dalian, Huaneng Dalian Power Plant has taken on the heavy responsibility of stabilizing the power grid at the critical moment when Dalian power grid is disconnected and isolated from the system. They kept up with the crisis and ran at low load and exceeded the limit, which prevented the collapse of Dalian power grid, undertook the arduous task of connecting Dalian power grid with Northeast power grid and closed it for a time. Dalian, a dark disaster of power failure, has passed. If there is no local power plant in Dalian, the consequences will be very serious. Xiao Gong also said that it is a critical moment to meet the peak and spend the summer, and Huaneng Dalian Power Plant shoulders the heavy responsibility of reliable operation of Dalian Power Grid. The biggest advantage of Huaneng Power Plant is safety. In this regard, Huaneng Power Plant has made many achievements. Four units in this factory have achieved zero boiler leakage for eight and a half years in a row, among which 1 unit has been continuously 17 years without boiler "four tubes" leakage accident. On April 23, 2009, Unit 2 of the plant operated continuously and safely for 760 days, which set a new record of continuous and safe operation of 600,000 kilowatts coal-fired units in China for 750 days and reached the world advanced level.
2. Safety education
Before visiting the factory, Xiao Gong gave us a safety education for half an hour. Safety is no small matter, and safety is related to personal and property protection. The first thing is to obey the law (laws and regulations), but many of us don't care about these little things. Xiao Gong said that we are all law-abiding citizens in life, and then gave several examples, such as who didn't run a red light when crossing the road. Indeed, we should pay attention to the small things around us, especially working in places with high safety requirements for power plants. Xiao Gong's 1 29 300 rule has educated us. This rule means that every 300 illegal acts may lead to 30 unsafe incidents, but once they are harmful to life. or vice versa, Dallas to the auditorium If we don't let these 300 illegal acts that may cause unsafe events happen, we will avoid the tragedy. The reason is profound and unforgettable. Safety is no small matter, and a small helmet is very useful at a critical moment. We all need to wear helmets when visiting. Maybe you don't think it is necessary, but you will realize it after your own experience. In order to avoid such a tragedy from happening again, we should develop good safety habits and safety awareness.
2. On-site harvest
1 & gt； Highly automated
Huaneng Dalian Power Plant has 4 units, 1 and 2 units have monitoring rooms, and 3 and 4 units have monitoring rooms. In the monitoring room, you can see the power generation, frequency change, load power and frequency change of each unit. The rated power of each generator set is 35MW, and the power generation of the generator set on that day is about 28.2MW, which still has a large margin. The monitoring room only needs about 10 people. With the deepening of power system reform, such as "separation of power plant and network, bidding for access to the internet", Huaneng Dalian Power Plant has formed an optimized maintenance management model integrating regular maintenance, condition maintenance and accident maintenance. In the monitoring room, you can always see the power generation of the power plant, so that the power grid company can pay the power plant electricity bill. Moreover, according to the types of power transactions, in the long-term, medium-term and short-term, power grid companies and power plants operate separately, and power plants bid for the internet. Therefore, for the management of power system, reasonable algorithms and software are needed to complete power transaction.
The power generation turbine is very big, which is completely beyond my expectation. Seeing objects is different from simple theoretical study. The structure is very complicated, but all the controls are automatic. It only needs to be operated in the monitoring room. That is to say, the degree of electrical automation is getting higher and higher, and the required electrical operation is getting simpler and simpler. However, people who design power plants need people in the electrical industry. At present, many power generation equipment in China are imported, so China should increase its independent development capacity in this area.
Complex structure of 2> power plant
I walked around the factory building and felt that the structure of the power plant was very complicated. I saw all kinds of pipes, such as seawater cooling, hydrogen cooling and heating pipes. In addition, I also saw many measurement and transmission modules. Seeing so many pipes and valves, I really don't know how to manage the valves of these pipes. If there is a fault, how to find the problem and find the problem in time.
Huaneng Power Plant has four boilers, which independently supply steam for steam turbines. The boiler is cooled by open sea water, so there is no cooling tower in the factory. Boilers 1 and 2 * * use chimneys, and boilers 3 and 4 * * * use chimneys.
3. Power plant operation
During my internship, I communicated with Xiao Gong, and learned that Huaneng Dalian Power Plant had carried out the transformation of cogeneration last year, and took out a small part of steam for steam turbine heating in winter. This saves the construction cost of heating boilers. And now cogeneration is a trend.
(2) The harvest of Dalian Electric Machine Factory
1. Understand the process of motor production.
Motor manufacturing is divided into shell, stator, rotor, bearing, winding, assembly, inspection and packaging. The shell is cast according to the mold, and then the motor shell is formed by machining such as cutting. Both stator and rotor are composed of stator and rotor blades. The stator sheet is made of steel sheet, and the inner side of the stator is provided with an inner groove. The coils stacked together can be embedded in the inner groove. While that rotor of the win type motor has an external slot so that a coil can be wound on the rotor. Cage rotor only needs a few symmetrical holes without outer grooves, and then aluminum is injected to form a cage rotor. The superposition of electrical steel sheets is used to reduce eddy current loss. The production of bearings also depends on machining, and the motor factory sees many machining lathes. After the bearing is processed, it is fixed with the rotor to form the rotor structure.
Embedding of winding, which is composed of coils made of several turns of copper wire. Under certain conditions, the winding is manually wound. The embedding of coil is a complicated process. I have studied the winding method of electrotechnics. At that time, I only learned to read the winding wiring diagram in theory, but it was not particularly clear at that time. Seeing real workers handling motor windings at the scene, I feel ok. But can they read the circuit diagram? As workers, they only know how to contact. What's more, we only saw the production of AC asynchronous motors, but did not see the production lines of other motors and new motors.
Finally, the motor is assembled and packaged, and the produced motor can only be put into the market after inspection. In addition, after reading many large-scale motor products, I feel that the AC asynchronous motor produced by the motor factory is still very useful and can be used in various fields.
Step 2 think about some problems
1 & gt； During the visit, I only saw the process of the production workshop, but I didn't see the R&D department of the company. If we only produce fixed products without innovation and improvement, it is very likely that the company will fall behind one day, especially the R&D and innovation of new motors require a large number of R&D personnel. In this regard, we can establish certain contacts with schools to achieve mutual benefit.
The automation level of 2> production line needs to be improved. The production workshop we see is still a traditional workshop with independent modules. There are still many workers doing manual work to speed up the improvement of workshop automation. For example, an automatic operation can be developed to complete the coil generation, and workers feel incoherent when working. We can improve the distribution of workshops and make the work continuity better.
Internship experience
1. Through this internship, I learned about the composition of the power plant, broadened my horizons, understood the operation mode and working nature of the power plant, realized that the automation level is getting higher and higher now, and understood the difference between the factory and the school. The goal pursued by enterprises is to get the maximum benefit, the nature of work is relatively fixed, and the professional knowledge is deeply studied, but the breadth is not enough. While pursuing economic benefits, schools and research institutes pay more attention to technological innovation and development, as well as the required knowledge. Through this internship, I pointed out the direction for future study and laid a good foundation for future work.
I got an opportunity to integrate theory with practice and deepened my understanding of theoretical knowledge. For example, we studied the basic structure of the motor in the electrical engineering, visited the whole process of motor production in this internship in the motor factory, deepened our understanding of theoretical knowledge, especially the winding method, and got a new understanding of the motor. It would be different if we can demonstrate the learning effect in kind every time we study electrical engineering. Electrical appliances, such as transformers, circuit breakers, load switches and disconnectors. From textbooks to practice, deepen the understanding of theoretical knowledge. The insulation and discharge prevention of electrical equipment mentioned in high voltage technology is still very useful to realize high voltage by seeing the insulation bushing on the transformer, which provides power for future study.
3. Improve safety awareness, working in a substation, safety is the most important. Through this internship, Xiao Gong talked a lot about safety education, which I felt was very good and benefited a lot. We should improve our safety awareness, and work with high-voltage electricity should be carried out in accordance with safety regulations, because once an accident occurs, it will do harm to personal safety, so we should always remind ourselves to pay attention to safety, be bold and cautious, and put safety first.
4. Cultivate the ability to find, analyze and solve problems. No matter in work or study, don't let go of any small problem, especially the staff engaged in the power industry. To understand the fault, you need to have the ability to find the problem, which of course requires profound knowledge and rich experience. Only by solving the problem can power supply be restored and people's production and living needs be met.
5. Cultivation of innovative ability. As college students in the new era, they should have their own opinions when accepting new things. For example, the motor factory we visited, the automation level of the factory, the research and development and improvement of new products, there are many places that can be improved. This may be the influence of funds and economic benefits, but we should be able to find problems and put forward our own improvement plans, and both future work and scientific research need unique innovation.
6. My shortcomings and areas that need improvement. Most students have little contact with reality now. The traditional laboratory experiment is an ideal environment. Most of the courses are theoretical knowledge, and there are too few opportunities to apply what they have learned. That's what I am. I should study hard theoretical knowledge, and at the same time, actively participate in internship activities to increase my hands-on ability, problem analysis, problem solving ability and innovation ability.
Finally, I want to thank the school and teachers for their efforts in this opportunity. Although the internship time is a little short, we will seize the limited opportunities to make preparations and try our best to get the maximum benefit.