Summary of professional technical work of electrical engineers

Time flies, and has graduated for three years. I have been working in xx company for more than two years. Due to the demand for work and improving my technical level, I entered the technical department of xx Power Distribution Equipment Co., Ltd. to study and work. He has grown into a qualified electrical engineer for more than two years at xx.

First, the growth process.

When you first enter the company, you must go to the electrical workshop for an internship. During the period, I was mainly familiar with the product and laid the foundation for future design. After the internship, I officially entered the technical department.

At the beginning, I was mainly responsible for designing small boxes, pgl, ggd, some standard xgn36-12 and other small orders, usually in a few units, or orders with an output value of less than 100,000. During this time, study with the chief engineer and the old engineer, train professional skills and basic knowledge at night, and then test the learning results on the order. I have been deeply impressed and influenced by the study and work during this time.

Some relatively standard engineering orders, such as the star-delta step-down start, full-voltage start, auto-coupled buck start, motor reversal, etc., were all studied at school, but at the time they were not impressed and made these motor controls. After the project, the previous theory and practice are combined, and the control products with their own style can be designed. Such as temperature control box, gas control box, street light control box and so on. The main problem encountered with this type of product is the placement of components, which directly affects the dimensions of the cabinet or cabinet and the cable orientation. Once you are not careful, users will encounter a lot of problems during installation and use. When doing such products, you must be careful, and go to the site to communicate with customers. After understanding the customer's intentions, it is best to design the approximate layout and appearance drawings for customer confirmation.

As the experience grows, we begin to make relatively large sets of gcks, usually in the number of dozens or hundreds, and the output value usually exceeds 500,000 yuan or even millions. The main functional units are: metering cabinet, incoming line cabinet, capacitor compensation cabinet, feeder cabinet, city power conversion cabinet, and communication cabinet. The metering cabinet basically puts forward new requirements every two years in the Guangdong Power Grid Dongguan Power Supply Bureau. Within one month of the new request, the most common problem occurs. For example, in the past, transformers requiring 315kva and above were required to install two sets of current transformers, one active meter, one electronic meter, and low-voltage charging. Now, for a group of current transformers and an active meter, 10kv high-voltage metering cabinets must be installed, and high-voltage charging is adopted. Once you don't pay attention to this problem, you can't pass the electricity to the site, but you can't pass the acceptance. The amount of on-site renovation is very large, and it will have a negative impact on the company.

Gck commonly used feeder unit is a drawer cabinet, which is a more advanced type of cabinet in China. It is usually necessary to pay attention to whether there is a "non-firefighting load" in the load. Such a load must be powered off during a fire to prevent the accident from expanding. A dc24v fire shunt coil is usually installed in the molded case circuit breaker to achieve tripping. Many people understand that "not the fire-protected load must be protected", causing the trip coil to be misplaced, and some fire-fighting loads are jumped off, such as fire-fighting fans, fire-fighting pumps, etc. In fact, fire-fighting loads cannot be powered off. . In the event of a fire, it can cause a more serious fire. It should be understood as "non-fire-fighting, must-protect load."

Later, start high-voltage cable distribution box dfw-12 and high/low voltage pre-installed power station ybp, then to xgn15 ring network cabinet, kyn28a-12 center cabinet and more complicated plc and inverter control cabinet, DC screen, Signal screen; from simple to complex; from small engineering, small quantity to large engineering, multiple large orders; with the increase of design engineering, the growth of experience, the system schematic design of each cabinet type, the design of the secondary control wiring diagram, Including a variety of non-standard motors, fans, fire control boxes, and a variety of dual power, multi-power three-in-two, five-in-three systems can be mastered and rational use. At the same time, it is very familiar with the structural characteristics of various cabinets. He was responsible for Dongguan PepsiCo Real Estate, Dongguan Party School, Changan Huanan Electronics Factory, Dongguan University of Technology City College, Akzo Nobel Paint Co., Ltd., Dongguan Guofeng Cereals and Oils Center Power House, Dongguan Ecological Park Office Building, Chashan Beautiful Bayside Garden Design of engineering projects such as residential areas and Dongguan Vocational and Technical College; through cooperation with Party A and weak power designers, they have a more comprehensive understanding of the design and operation of power systems. During these years, the chief engineer participated in the analysis of the arcing accident of the vertical busbar terminal of Zhujiang Brewery, the short-circuit fault analysis of the 10kv outdoor cable distribution box of Fenggang Power Supply Company, the treatment plan of Zhongtangsha Pump Factory affected by harmonics, and Dongguan Yu The noise treatment of the high-current cabinet of the Yuan Shoe Factory deepened the understanding of theoretical knowledge, improved the theory and practice, deepened the impression, and gained a new understanding of the product and broadened its horizons.

Keeping pace with the times, pioneering and innovating, the same is true in the power industry. In order to meet the needs of the power grid, in the second half of 2019, the Dongguan Power Supply Bureau required 10kv non-dedicated line customers to use single-supply circuit breakers with fast protection function to avoid faults in the distribution network caused by customer failure of power-receiving equipment and reduce losses caused by fault currents. Greatly improve the reliability of power supply. For example, when a 10kv overhead distribution line is connected to a branch line or an internal user fails, the line switch protection action time limit and the substation outlet switch protection time limit cannot be properly adjusted, which will cause the substation outlet switch to trip. . If the nature of the fault is permanent and the substation coincidence will not be successful, a local accident in a medium voltage user community will power down the entire 10kv distribution line, with unimaginable consequences. If a user demarcation switch is installed at the t-connection or the user end, after a judgment is made to confirm that a fault occurs in the user boundary, the fault is automatically isolated, and the user in the non-faulty area can be normally powered.

Second, new product development and process improvement.

In recent years, due to the slow economic growth, the market demand for power distribution products has plummeted, and the competition among various power distribution equipment manufacturers has become increasingly fierce. During this period, the company strictly controlled product quality, optimized design solutions, and lowered the cost while ensuring quality. .

1. By improving the secondary plug-in program of the drawer, the cracking of the secondary plug-in program is greatly reduced, and the plugging is not in place, which ensures the reliability of power consumption;

2. Make requirements for the first and second processes of the product, unify the line number, the length of the unified number tube, the installation method, etc., and strive to make the product wiring beautiful and reasonable, ensure the consistency of the product, and improve some unreasonable places;

3, the original capacitor cabinet discharge lamp uses two circuits per circuit, because the capacitors now have discharge resistors, so instead of one lamp per circuit, the cost is saved. Manufacturing costs are reduced, and work efficiency is improved, while waste is eliminated.

4. For new products, under the direction of the general manager, under the leadership of the company's senior engineers, the company successfully developed 10kv vs1 high-voltage vacuum circuit breakers, high-voltage AC sf6 sulphur hexafluoride load switch two new products to enhance the company's competitiveness. . At the same time, through the design and improvement of the secondary circuit of the circuit breaker, and the inspection cabinet for designing and testing the secondary line of the circuit breaker, the switch itself has a deeper understanding.

5. In XX years, under the leadership of General Manager Li, the company successfully developed the 4000a high-voltage large-current cabinet, supplementing the blank of Dongguan's local production.

6, a company only does not

Breaking innovation can achieve sustainable development. Under the leadership of Zhang Zong, Li Gong, Yuan Gong and Wang Gong, the company has independently developed xfw1 frame circuit breakers and xfm1 molded case circuit breakers. These two products are currently in the experimental stage. I believe that soon In the future, Xiongfeng brand will occupy a certain market in the field of switch in China.

Third, the standardization of the work program.

Standardization of work programs can reduce human error opportunities and ensure the accuracy of drawings. As the core department of the company, the technical department, as the project leader, assists the sales department to produce electrical schematics and cabinet layouts for customers, which improves the accuracy of the quotation, avoids the inconsistency with customer requirements, and reduces errors. For the production department, we strive to unify and standardize the drawing styles and design ideas of all designers. At the same time, after the technicians put the drawings, they will go from sheet metal, welding, dusting, assembly, to electrical installation and secondary wiring. Track all the way with the workers and listen to their valuable opinions to make the products more perfect.

"The road is long and the road is long, I will go up and down." With the support and help of the company's leadership care and colleagues, through unremitting efforts, I have a certain technical ability, basically able to stand alone, but still exist Some shortcomings. In the future work, I will continue to charge, and ask experienced colleagues, colleagues and workshop operators to learn the skills or skills that they have not really mastered, and apply what they have learned. Through study and practice, we will exercise and grow in practical work, accumulate work experience, strive to improve our own quality and professional skills, and deliver positive energy for the company's development and growth.