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Model essay on electrical engineering
Electric power has become the basic industry of modern industrial countries. Although China's economy is in the process of industrialization, the development of China's electric power industry has been highly valued by the government since the founding of the People's Republic of China. The following is the content of the model essay of electrical technician I collected for you. Welcome to read the reference!

Model essay of electric power technician 1

On the concrete measures of intensive management of electric power materials

With the continuous progress of science and technology, the functions of power equipment tend to be perfect, so the comprehensive strength of China's power enterprises has also been significantly improved, and the power industry has become increasingly mature, which has also played a certain role in the growth of the national economy on the basis of satisfying people's production and life. Under the background of the continuous reform and improvement of the market economy system, electric power enterprises should strengthen management, especially the scientific management of electric power materials, so as to avoid the waste of electric energy. However, under the influence of traditional management methods, there are still many problems in power material management, which have a negative impact on the healthy development of power enterprises. In the actual operation of power grid, power generation, transmission and distribution are closely related to power material management, and the level of power material management is directly related to the resource cost in the operation of power grid and the economic benefits of power enterprises. Therefore, under the background of global economic integration, power enterprises should strengthen material management to save costs and improve power production efficiency, thus ensuring the intensive development of power material management.

First, the connotation of intensive management of power materials

Intensive management is one of the important modes to improve the management efficiency of contemporary enterprises, and it is also the basic guarantee to realize the optimal scheduling of power materials. As the name implies,? Dense? It is to manage all the human and material resources that can be allocated in a unified way, and then adhere to the economical value orientation in the process of resource allocation, so as to realize the optimal allocation of power materials. According to the development trend of market economy in recent years, the intensive management of power materials has gradually become an important and effective way for Chinese enterprise groups to save costs and improve production efficiency.

At present, there are still many loopholes and deficiencies in the intensive management of power materials in China, which still need further improvement and perfection. Only in this way can the quality of power engineering construction be truly realized. Material resources refer to the material resources of enterprises. All the means of production, whether equipment, workshop or fuel, that an enterprise needs in its activities and business operations include fixed assets and current assets. In the process of development, electric power enterprises should aim at the intensification of material resources, optimize resource allocation, control costs and reduce risks, so as to improve the application efficiency of enterprise material resources. Therefore, electric power enterprises should strengthen the intensive management of material resources, improve bidding and contract management, so as to improve their competitiveness.

Second, the advantages of intensive management of power materials

(a) Reducing costs and expenses

In the development of electric power enterprises, the intensive management of electric power materials is helpful to reduce costs and expenses, so that electric power enterprises can obtain more economic profits. In the market, the price of purchasing a single product is obviously higher than that of bulk purchasing. Therefore, when purchasing materials, electric power enterprises can purchase in bulk to gain the initiative of product price, which can not only reduce the price of materials, but also meet the needs of suppliers to a certain extent. In addition, material procurement can be effectively completed in a short time, so power enterprises can shorten the time of material procurement and minimize transaction costs.

(b) Good cooperation with suppliers

Under the intensive management mode of power materials, power enterprises can cooperate well with suppliers when purchasing materials to ensure a more stable relationship between supply and demand, so that both sides can obtain certain benefits. By maintaining a stable supply relationship, power enterprises can intensively manage materials, optimize power materials, and give full play to the advantages of intensive material management of power enterprises.

Third, the problems existing in the intensive management of materials in power enterprises

(A) the material supply management link is not perfect

Under the market economy system, electric power enterprises have always been the pillar industries of our country, but due to the late development of marketization, the material management system of electric power enterprises is not perfect, and the material supply management is not perfect, which has a negative impact on the intensive management of material resources. With the continuous reform of the economic system, the State Grid Corporation of China aims to improve the intensive management of power materials, and through the intensive management of material resources, realize the integrated utilization of resources and rationally allocate and control material resources. However, from the current situation of intensive management of material resources, there is no effective supply mechanism, no scientific and comprehensive investigation when cooperating with suppliers, and imperfect material supply management links, especially problems in supply links, which have a negative impact on the intensive management of power material resources.

(B) the intensive management of material resources is not in place.

At present, in the process of intensive management of material resources in electric power enterprises, there is a phenomenon that material management is not in place. When making material demand plans, material managers do not have comprehensive plans, which are not timely and accurate. The power material management department still adopts the traditional management mode when compiling the material demand plan, and there are loopholes in material management, which restricts the development of intensive management of power material resources.

(3) Imperfect material management methods Under the influence of traditional ideas, some power companies still adopt backward management methods during the period of intensive material management, and they cannot innovate and the material management methods are imperfect, thus causing many problems in the intensive management of power materials. The level of science and technology is constantly improving, but some electric power enterprises fail to organically combine information technology with intensive management of electric power and material resources, and the efficiency of intensive management of electric power is low, which is not conducive to the good development of electric power enterprises.

Four, the specific measures to effectively promote the intensive management of power materials in power enterprises

(A) improve the supply chain

In order to improve market competitiveness, power enterprises should fully understand the intensive management of power and material resources. At present, in the process of intensive management of power material resources, power enterprises should make clear the objectives of intensive management of power material resources, improve the supply chain and maintain good cooperative relations with suppliers. Therefore, in order to effectively solve the problems existing in the intensive management of power material resources, power enterprises should improve the supply link, make the supply link more scientific and realize the intensive management of material resources.

Power enterprises need to combine the actual demand of power materials, set the goal of intensive material management, adopt the three-level material supply operation mode, and vigorously deepen and implement centralized procurement. When selecting suppliers, we should fully grasp the product quality and supply ability of suppliers, and establish good communication and cooperation relations with suppliers in accordance with perfect supplier evaluation standards and the principle of combining qualitative and quantitative. At the same time, under the first-class material intensive management system, ensure the supply quality, centrally control the product quality and business, and promote the stable development of material intensive management. In addition, power enterprises should also do a good job in intensive management of power materials.

Under the brand-new material management mode, power enterprises need to cooperate in material bidding and purchasing management, financial budget, comprehensive planning and other aspects to realize the docking with power material management and control the whole process of power material management [2]. In addition, power enterprises also need to establish a unified cost standard for financial intensification of power enterprises. In the process of purchasing materials, we should control the price of materials within a reasonable range, minimize intermediate links and ensure a more reasonable supply state. At the same time, electric power enterprises should establish inventory in the market, reduce the backlog of electric power materials inventory, and make effective capital turnover, thus ensuring the good progress of intensive management of electric power materials.

(B) Optimize the allocation of resources

In the process of solving material management, electric power enterprises should optimize the allocation of resources, so as to improve the quality of material management of electric power and promote the remarkable improvement of economic benefits of enterprises. In the process of intensive management of power materials, in order to make it develop to intensive management more smoothly, power enterprises need to invest more energy in the optimal allocation of resources. Therefore, power enterprises need to combine their own development, analyze the elements of intensive management of power materials, and then optimize the allocation of material management elements [3]. In addition, in order to achieve good results in the intensive development of power materials, power enterprises should reasonably divide the responsibilities and functions of power materials management into corresponding departments according to actual needs, and then each department should seriously implement power materials management. In a word, power enterprises can create favorable conditions for the effective development of intensive management of power materials by optimizing resource allocation.

(3) Establish and improve the power material information system.

With the continuous progress of science and technology, the level of information technology has been improved, so information technology has been applied in all walks of life, providing a favorable foundation for enterprise management and various work [4]. If electric power enterprises want to occupy a place in the fierce competitive market, they must change their ideas, not only strengthen the management of electric power materials, but also increase the application of information technology in the process of material management, edit the production date and quantity of materials in the material management system, and sort out the information of electric power materials by establishing a perfect information system, so as to promote the effective development of electric power materials management and improve the efficiency of electric power materials management [5]. For power materials, it contains a lot of resources of power enterprises, with a wide variety of materials and a complex power material management system. Under the traditional management mode, it has been difficult to meet the actual needs. Power enterprises must apply information technology to power material management and establish power material information system to significantly improve the management level of power materials. Realize the intensive, networked and standardized development of material management. Combined with the current information technology, power enterprises can take ECP and ERP as the main body, build e-commerce platform and application, and then build an intensive power material management information system to ensure the safety and reliability of the electronic material management system under the action of e-commerce platform [6]. At the same time, power enterprises need to establish a material management and supervision platform and an electrician procurement platform. Through online early warning and online monitoring, they can effectively manage the supply chain of power materials. Whether the equipment of power enterprises can meet the requirements, relevant personnel can scientifically and efficiently manage the materials of enterprises with the help of a sound power material information system, so as to enhance the competitiveness of enterprises and occupy a place in the highly competitive market.

Concluding remarks

With the continuous development of China's economic construction, the problems in power material management are more obvious. In order to promote the vigorous and efficient development of China's power industry, it is necessary to establish and improve intensive power material management. First of all, the electric power industry is an important part of national economic security. Secondly, it is one of the indispensable energy sources in people's lives. In view of the problems existing in power material management, the corresponding concrete measures are put forward. By enumerating the specific measures of intensive management of power materials, the necessity of intensive management of power materials is better verified, and the cost consumption in the process of power development is reduced and the production efficiency is improved.

Model essay on electrotechnics II

Analysis on Operation and Maintenance Strategy of Power System Relay Protection Device

Introduction to 0

Nowadays, with the rapid development of China's power system, power companies have set up many relay protection devices in order to improve the stability of power supply. In China's power system, relay protection devices play an irreplaceable role. However, judging from the current situation of relay protection development in China, there are still many problems, such as secondary circuit failure of voltage transformer, saturation problem of current transformer and power failure. The existence of these faults seriously restricts the operation stability of power system. Therefore, electric power enterprises should pay attention to the operation and maintenance of relay protection, strengthen the management of operation and maintenance, and regularly check relay protection devices to ensure the reliability and safety of power system.

1 Operation requirements of relay protection

1. 1 sensitivity

In power system, relay protection devices should have strong sensitivity. When the power system encounters operational failure during operation, relay protection can make a quick response to avoid safety accidents. This shows the importance of power system relay protection.

1.2 reliability

The relay protection device should also be reliable. When the power system fails, the relay protection device can ensure the reliable and stable operation of the equipment in a certain range. In addition, when the power system equipment can not operate normally, the relay protection should prohibit the occurrence of wrong signals, so as not to interfere with the judgment of the relevant person in charge.

1.3 selectivity

In the actual operation of power system, once the operation fault occurs, the relay protection device should selectively judge the power system fault, accurately cut off the fault system or the switch equipment with the latest fault, and control the operation fault within a certain range to prevent it from expanding, so as to reduce the occurrence of power accidents and ensure the safe and stable operation of other equipment.

1.4 rapidity

In order to improve the power supply safety of the power system, once the power system fails, the relay protection should respond quickly and reclose automatically in the shortest time to control the failure within a certain range, thus reflecting the rapidity of the relay protection device and minimizing the equipment failure loss.

Analysis of Common Faults in Relay Protection Operation

Judging from the current situation of China's power system development, there are still many failures of relay protection devices. If these faults are not further analyzed, they will continue to hinder the stable power supply capacity of the power system. So let's talk about the common faults in relay protection operation:

2. 1 voltage transformer secondary circuit failure

In the operation of relay protection, the secondary circuit fault of voltage transformer often occurs, and the reasons for this fault are as follows:

First of all, in general, the neutral point of the secondary circuit is ungrounded and multi-point grounded. When the secondary circuit is not grounded, the voltage in the line will be unstable, which will seriously affect the transmission effect of electric energy. At the same time, because the level of science and technology in China is not developed enough, it is difficult to eliminate this kind of fault, which requires the relevant staff to check the equipment regularly. Secondly, in the operation of power system, the PT open delta voltage circuit is disconnected, which makes the zero sequence protection in the equipment refuse to operate. Finally, there is a very common fault, that is, the current equipment performance and secondary circuit are not perfect, which sometimes leads to the secondary voltage loss of PT.

2.2 Current Transformer Saturation Problem

At present, the most common current transformer in power system is electromagnetic current transformer, so saturation problem is also a common fault. Once the current transformer is saturated, it will mislead the accurate judgment ability of the relay protection device. At the same time, when saturation occurs, the primary current of current transformer will be converted into excitation current, which will seriously affect the linear transformation of secondary current, thus causing the system to trip, thus affecting the power supply capacity of power system.

2.3 Power failure

In the operation of power system, power supply is very important, which can control the operation of the whole line. In relay protection, if the output power of power supply becomes smaller, it will directly reduce the output voltage, thus affecting the stable operation of relay protection, and ultimately making it impossible for relay protection to make accurate judgments.

2.4 Interference and insulation problems

It is very important to check the relay protection devices regularly, but from the current situation of relay protection inspection in China, there are still many interference and insulation problems, such as some modern communication equipment will interfere with the inspection accordingly. At the same time, when the microcomputer relay system is used, its linear density is very high, and a lot of dust will be produced in the process of use, which seriously interferes with the fault detection of the relay microcomputer system and lays a great safety hazard for the operation of the power system.

3 effective strategies for operation and maintenance of power system relay protection

3. 1 Regular inspection and inspection

In power system, it is very important to check the relay protection device regularly. In the specific inspection process, it is mainly to check whether the relay protection device has problems such as heating, smoking, burning and abnormal sound. At the same time, check whether the power supply and indicator light of the equipment are normal, and whether the equipment has problems such as off-axis and tilt. In addition, the running state of the relay protection device must be carefully checked. Once it is found that the relay protection can't operate normally, it is necessary to find the problem in time, then check it and find out the corresponding measures to solve it. When installing the relay protection device, if the primary circuit and secondary circuit of the relay protection device are reformed at the same time, after the device has been running for a period of time, it must be thoroughly inspected to ensure the normal operation of the device. If there are defects in the operation, we should focus on the inspection according to the actual situation and make a scientific and reasonable inspection cycle to ensure the normal and stable operation of the relay protection device.

3.2 Strengthen operation and maintenance management

During the operation of relay protection device, it is necessary to strengthen the operation, maintenance and management of equipment. Strengthen operation and maintenance management from the following points:

First, the relevant staff of the power system should pay close attention to the running state of the relay protection device. Once they find any fault problems, they should report to the superior leaders in time, and understand the cause and location of the fault, and then take corresponding measures for maintenance. In the process of maintenance, the switch near the fault should be cut off first to ensure the life safety of maintenance personnel and avoid the danger of electric shock. Second, when the relay protection device is in maintenance, if it encounters a trip problem, it is necessary to analyze the trip reason first, and then reset the lost card signal. In this process, the maintenance personnel must standardize their own operation behavior, operate in accordance with relevant regulations, and eliminate faults in combination with the actual situation of relay protection devices. If there is any violation or abnormality, the equipment switch must be cut off in time and analyzed according to the design requirements of electrical installation to ensure the safety of maintenance personnel and the normal stability of the equipment.

3.3 Improve the level of operation and maintenance

3.3. 1 Increase investment in capital and technology.

Nowadays, China's science and technology are constantly improving, and new technologies from all walks of life emerge one after another, and relay protection devices are no exception. Judging from the current development status of relay protection devices in China, compared with developed countries abroad, the technology is still relatively traditional and backward. Therefore, the relevant departments of our country should increase investment in the maintenance of relay protection devices, attach importance to the maintenance of relay protection devices, and introduce some advanced technical equipment to improve the running speed and safety of relay protection devices, such as combining relay protection devices with electrical equipment to learn from each other's strong points and improve the advantages of relay protection, so as to ensure the power supply safety of power system.

3.3.2 Strengthen daily operation and maintenance.

In the relay protection device, the fault is random, but once the relay protection device fails, it will directly affect the operation stability of the power system. Therefore, in order to improve the operation efficiency of relay protection devices, it is necessary to strengthen their daily maintenance. In addition, the monitoring of relay protection devices should be done well. In case of abnormal situation, problems can be found in time according to the monitoring system, and effective measures can be taken for maintenance, so as to improve the operation and maintenance level of relay protection devices.

3.3.3 Do a good job in professional skills training for maintenance personnel.

As we all know, all work is inseparable from people, and the operation and maintenance of relay protection is no exception. In the operation and maintenance of relay protection, we must pay attention to the professional skills training of maintenance personnel, so that maintenance personnel can accumulate more practical experience and clearly analyze the cause and location of the fault when the relay protection device fails. In addition, power companies should constantly improve the safety awareness of maintenance personnel and regularly assess their professional knowledge. Conditional enterprises can also hire some senior experts to teach, so that maintenance personnel can have a deeper understanding of the theoretical knowledge and operation skills of relay protection, thus laying a solid foundation for the safe operation of relay protection devices.

4 conclusion

In a word, the operation and maintenance of power system relay protection in China is a long-term and complicated work. Therefore, electric power enterprises should strengthen the operation and maintenance management of power system relay protection, check the relay protection devices regularly, and take corresponding measures to solve the faults once they are found, so as to ensure the safe and stable operation of equipment, thus laying a solid foundation for the development of electric power enterprises in China.

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