Model essay 1: application of electrical automation in power system
The application of electronic automation technology in power system can not only effectively save system cost and improve system work efficiency, but also effectively improve the safety performance of power system. In practical work, power system staff should attach importance to electrical automation technology, have a clear grasp of the current application of electrical automation technology, and make contributions to ensuring the benign operation of power system.
Keywords: electrical automation technology; Electric power system; Control technology; Simulation technology; Intelligent technology; Safety monitoring technology
With the acceleration of economic construction, China's power system has been greatly developed. In power system, with the development of digital technology, the traditional application mode has shown some inadaptability. The application of electronic automation technology in power system can not only effectively save system cost and improve system work efficiency, but also effectively improve the safety performance of power system. This paper will analyze the development demand of power system control technology, discuss the application of electronic automation in power system, and study the development trend of electronic automation, hoping to provide help for the development of power system in China.
1 requirements of power system for control technology
1. 1 information requirements
With the development of science and technology, the demand for informatization in power system is more and more urgent. For power system, in order to ensure the stability of system operation and obtain good economic benefits, it is necessary for power system control to have high security and stability. The development of information technology provides a good control platform for power system. In the power system, relying on the development of information technology, electrical automation control technology has made a very significant breakthrough in the automatic operation of machines. It can be seen that good information technology and intelligent level play a very important role in improving operation efficiency and ensuring the stability of power system.
1.2 safety requirements
The electric power industry is a pillar industry in China and occupies a very important position in the national economy. Maintaining the stability of power system is the basic guarantee to promote the good development of various industries in China. With the increasing dependence of various industries on power applications, how to ensure the safety and reliability of power systems has become a very important issue. In order to meet the safety requirements of the power system, the power system should have good maintenance function and very simple operation, and at the same time, when the power system fails, the system itself should be able to make rapid diagnosis of the fault. In power system, the application of power automation control technology can effectively improve the safety requirements of power system, simplify the operation difficulty of the system, diagnose and deal with the faults generated by the system in time, thus ensuring the safety of power system.
Analysis on the Application of Electrical Automation in Power System
2. 1 application of electrical automation technology in power system at present, electrical automation technology has been widely used in power system. Specifically, the application of electrical automation technology in power system mainly includes the following aspects:
2. 1. 1 Simulation technology in electrical automation. Electrical automation simulation technology plays an important role in the benign operation of power system. Simulation technology can manage a large amount of data information of power system, and provide a realistic data simulation operation environment according to these data information. At the same time, the simulation technology can realize synchronous operation through various control technologies. For faults in power system, simulation technology can analyze and judge faults through effective simulation, thus effectively improving the operating efficiency of power system. At present, in the new power system, simulation technology is widely used in equipment testing, and achieved good test results.
2. 1.2 Intelligent technology in electrical automation. Intelligent technology is an advanced research achievement, especially in the control of complex nonlinear systems, intelligent systems have a very good control effect. Power system can effectively improve the control flexibility of the system through intelligent technology, and at the same time, real-time transmission of data information can be realized through network information technology, thus effectively improving the speed of system fault detection and making timely solutions. In addition, intelligent technology can also effectively improve the loopholes in the system, which shows that intelligent technology has a very broad development prospect in the power system.
2. 1.3 Safety monitoring technology in electrical automation. Safety monitoring technology is an important embodiment of the application of electrical automation in power system. Safety monitoring technology can effectively monitor the operation of the system through scientific monitoring means to ensure the benign operation of the system. At present, safety monitoring technology mainly collects electromagnetic transient fault information in real time to achieve the purpose of monitoring power system. The application of safety monitoring technology mainly depends on GPS technology and SCADA technology to achieve the purpose of dynamic monitoring. Among them, information communication system, central data processing system, dynamic phasor measurement system and synchronization system are the four main components of safety monitoring technology. With the change of power system monitoring from steady state to dynamic state, it also marks that safety monitoring technology has entered a new era of dynamic monitoring. Dynamic security monitoring technology plays a very important role in ensuring the stability and improving the operating efficiency of power system.
2. 1.4 Flexible AC system technology in electrical automation. Flexible current technology is also a key link in the application of electrical automation in power system. Specifically, the flexible current technology refers to the effective adjustment of the parameters of the power supply system through the scientific and technological treatment of the key links of power supply and the use of electronic equipment with strong independent performance. The application of flexible current technology plays a very important role in ensuring the stability and security of power system. The core equipment of flexible AC technology is ASVC device. The technical structure of ASVC device is relatively simple, and it belongs to static var generator. However, due to the effective combination of ASVC device and flexible communication system technology, it has a good application effect. When the system fails, ASVC device can be adjusted quickly, thus ensuring voltage stability in a short time. In addition, ASVC devices have good voltage regulation range and fast response speed, so there is almost no delay in practical work. At the same time, in terms of noise and inertia, ASVC device also has a good effect and has been widely used in power system.
2. 1.5 Multiple integration technology in electrical automation. In the power system, the unified management of the system can be effectively promoted through electrical automation technology. The unified management function is realized by a number of integrated technologies in electrical automation. In the traditional power system, the mode of separate management is usually adopted, which can not guarantee the work efficiency, but also increase the operating cost of the system. Many integrated technologies can unify the management and safety protection in the power system according to the different requirements of users through scientific technical means, so as to achieve the purpose of centralized management. Centralized and unified management mode can not only provide strong technical support for the design, construction, testing and maintenance of power system, but also ensure the benign operation of all links of the system and effectively reduce the economic and human costs brought by system operation. According to statistics, compared with the traditional system, the power system adopting electrical automation technology can effectively reduce the operating cost and indirectly improve the economic benefit by about 30%.
2.2 Application of electrical automation in power system
2.2. 1 substation automation control. In power system, substation automation control is an important field of electrical automation application. The application of substation electrical automation technology can effectively improve the operation efficiency of substation. Specifically, the application of substation electrical automation technology is mainly realized by program-controlled equipment. Technicians transform the traditional electromagnetic equipment in the substation into programmed equipment, which effectively improves the automation degree of the substation, realizes all-round monitoring of the working process of the substation, and ensures the stability and safety of the substation while improving the working efficiency of the substation.
2.2.2 Automatic control of power grid. The operation quality of power grid has a decisive influence on the stability of power supply, so ensuring the reliability of power grid work by scientific means has always been a key research issue for power enterprises. In the field of power grid engineering, the application of electrical automation technology can effectively improve the automation degree of power grid operation, thus ensuring the stability of power grid operation. Electrical automation technology can scientifically dispatch substations, workstations, servers, etc. In the power grid engineering, through the powerful data information processing ability, the operation information of the power grid is accurately collected through the control department and equipment terminal of the substation. According to these information systems, the operation state of power grid can be judged scientifically.
3 development trend of electrical automation in power system
Electrical automation plays a very important role in the benign operation of power system. Through electrical automation, the operation efficiency of power system can be effectively improved, and the safety and stability of system operation can be improved. With the development of science and technology, the application of electrical automation in power system has the following three development trends:
3. 1 The trend of protection and control integration is a major trend in the development of electrical automation. At present, China's electrification control system mainly collects and analyzes monitoring data in a relatively independent way. Unified protection and control can effectively reduce the repeated configuration of the system, increase the rationality of technology, and thus achieve the purpose of reducing workload. In practical work, the data information of power system measurement, protection and control are obtained from the power field, which is relatively inaccurate. The control of CPU main control unit can avoid the steps of remote control output and execution, thus effectively improving the reliability of the system. It can be seen that the integration of power system protection and control has become a very important development trend.
3.2 Internationalization trend Internationalization trend is the main development trend of electric automation in power system. At present, the international standard is IEC6 1850, which enables different types and specifications of IED devices to exchange information effectively, thus achieving the purpose of information sharing. In China, the research on the application of international standards for electrical automation has been effectively carried out, and it is regarded as the main development direction of electrical automation in the future.
3.3 Informatization trend Informatization trend is also the main trend of electrical automation development. With the development of Ethernet technology, the speed requirement of power automation for data transmission has been greatly met. It can be predicted that in the future development trend of power system, based on information technology and effectively combined with industrial production, field bus technology with information technology as the core can be formed.
4 conclusion
In power system, the application of electrical automation technology can effectively improve the working efficiency of the system and enhance the security and stability of the power system. In practical work, power system staff should attach importance to electrical automation technology, have a clear grasp of the current application of electrical automation technology, and make contributions to ensuring the benign operation of power system.
refer to
Li Aimin. Development trend of electrical automation and its application in power system [J]. Science and Technology Information, 20 12, (27).
Liu Meng. Application analysis of electrical automation technology in power system [J]. Communication World, 20 14, (2 1).
Luo Xiaoming. Application and development trend of electrical automation in power system [J]. China High-tech Enterprise, 20 13, (20).
Fan Wener: Automation Construction of Power System Distribution Network
Abstract: With the improvement of economic development level, the demand for electricity is also increasing. In order to meet the demand for electricity for production and life, the state has gradually invested in the construction of automatic distribution network projects. This is a comprehensive project, which requires careful planning, huge investment and complex technical requirements, involving all aspects. This paper discusses the construction strategy of distribution network automation in power system.
Keywords: electric power system; Distribution network engineering; Automated suggestion strategy; Power demand; Power supply efficiency; Power quality
The application of distribution network automation is of great significance for scientific distribution of electricity and rational application of scientific and technological achievements to promote the development of power grid. Through automation engineering, not only can the power supply efficiency and power quality of the power grid be effectively improved, but also the power grid pressure can be reasonably relieved, the power grid potential can be released, the fault frequency can be reduced, and the service capacity of the power grid can be improved. Automation engineering can help power grid self-check, shorten the time of fault investigation and treatment, and further improve the security and stability of power grid. For a modern society that relies heavily on electricity, this is a significant reconstruction project.
Research background of 1
The definition of distribution network automation engineering can generally be understood as using advanced communication technology and network technology to protect the power grid, control power generation, detect problems, measure electricity consumption, provide various information for power supply institutions, simplify management difficulties, and improve power supply efficiency and power quality. Through automatic distribution, it is helpful to understand the various needs of users, adjust the power supply and price of the power grid, and achieve the development goal of paying equal attention to economy, science and safety. Of course, this is a systematic and comprehensive project, which is a huge adjustment to the management mode and equipment transformation of power enterprises, and finally forms a unified service-oriented power grid. The basic principle of this project is to transform the original unified operation line into different power supply areas through sectional switches. In this way, even if there is a problem in a power supply part, the switch can be quickly locked to isolate the fault area from the power grid with normal power supply, so that other areas with normal operation can restore power supply, avoiding that all circuits on a line are broken because of a small fault, causing greater influence range and loss, greatly reducing the influence area and enhancing the reliability of power supply.
2 Basic requirements
2. The1line should be in the form of ring network. In order to ensure the stability of power supply, double power supply or even multiple power supply systems can be adopted.
2.2 Trunk lines are mostly segmented. The advantage of segmentation is that once a line fails, it can ensure that other lines still supply power normally by cutting off the failed line. Generally speaking, the construction principle of sectional trunk power supply is: rational use of investment, practical use of the principle of reciprocity, or equal line length, or equal load, or equal number of users. Taking the three-kilometer trunk line as an example, it is generally divided into three sections.
2.3 Abandoning the traditional circuit breaker automation project and adopting the load switch can not only save the cost and reduce the investment scale, but also effectively isolate the fault area when the fault occurs, so that it will not affect the non-fault area.
Three design points
3. 1 The software shall be maintainable.
After the distribution network has reliable power supply, perfect monitoring equipment, complete line facilities and other hardware conditions, an important content of automation engineering is whether it is equipped with special software equipment. Only when the software and hardware are matched can the distribution network operate automatically, safely and stably. Software system is usually mentioned, and its maintainability is more considered. A suitable software must be constantly improved and updated. Based on the development of China's social economy, the demand for electricity is also fluctuating, so the load of distribution network is also changing. If the distribution network automation software can not effectively maintain the fluctuating power grid, the so-called automation becomes unrealistic, so the maintainability of the software becomes the most basic premise of the distribution network automation project. Only when its technical software can be maintained can the stability and normal operation of power system be effectively guaranteed and the overall service life of automation engineering be prolonged. Only by ensuring the stability of the power grid can power supply enterprises gain a foothold in the increasingly competitive power supply market and meet the needs of social development.
3.2 improve the reliability of distribution automation system
An important requirement of distribution network automation transformation is to enhance the stability of the power grid and improve the fault tolerance rate of the power grid. Therefore, an important criterion for building an automated power grid project is whether the system can handle itself when the system fails or has uncontrollable accidents, so as to ensure the power supply capacity and quality of the whole system. Therefore, for the construction of automatic distribution network engineering, it is necessary to find ways to improve its system stability and operational reliability.
3.3 Further improve the operating efficiency and portability of the system.
Improving the efficiency of power grid automation generally refers to whether computer resources can be fully utilized. Portability, as the name implies, means that when the whole system is transplanted to another software and hardware environment, the system can run stably and efficiently. Portability is very important for power enterprises, which enables them to meet the needs of different power supply environments at a fixed cost and be effectively compatible with other related units.
4 matters needing attention in technical realization
4. 1 Strengthen the construction and transformation of distribution network
For power supply enterprises, the smooth operation of power system is the primary task, even if the power grid is transformed into automation, it is also for this goal. Therefore, in order to realize automatic operation, it is necessary to improve the distribution network structure, actively apply advanced frontier technologies, transform old equipment and improve intelligence. In the construction of distribution network, we should emphasize the importance of metering devices, rationally arrange them and comprehensively rectify them.
4.2 Further improve the corresponding hardware support system.
At present, the construction of distribution automation projects in power enterprises will generally start from the following two aspects: the first is market forecast. This paper mainly uses scientific data processing and analysis system to record, analyze, compare and predict the different electricity consumption of power supply networks in different regions and different time periods. By forecasting the next electricity consumption, it provides reliable data for enterprise development planning; The second is the construction of the restoration system. When the normal power supply situation is abnormal, the automation system must have the ability of self-inspection and alarm in time after the fault is determined, and further have a preliminary solution. A series of repair systems can minimize the accident rate and the degree of accident harm, and ensure the safe and stable operation of the system.
4.3 improve the self-diagnosis ability of distribution network
Technology and new equipment meet the functional requirements of system self-inspection, self-detection and self-management, thus ensuring the stable operation of the system.
5 practical mode of power system distribution automation
5. 1 Centralized Intelligent Mode
Centralized intelligence mode is the first mode of power system distribution automation, which mainly means that the intelligence of the whole system depends on the master station. The real-time situation on the line is uploaded by the section switch on the line, and the fault of the line is located by the intelligent diagnosis of the main station, and then the appropriate solution is sought by isolating the faults of each section of the power grid structure. The advantage of this mode is its strong applicability and easy handling of some multi-fault situations, so it is an advanced intelligent mode.
5.2 Distributed Intelligent Mode
Distributed intelligent mode means that the switches on the line have their own intelligent judgment ability, which can self-detect faults and determine which parts need to be isolated and repaired without uploading real-time status and requesting feedback from the main station, mainly because the segmented switches play a role. Specifically divided into current counting type and voltage time type. The advantage of this intelligent mode is that the system with simple grid structure has strong usability in areas with imperfect communication conditions.
6 Future technological development
Automation of distribution network in power system is one of the inevitable trends in the development of power enterprises at present, and the future development trend also surfaced in the prospect of researchers. The development trend is: First, with the application of high-power equipment, the power quality has been effectively improved; Secondly, the protection ability of distribution network system is stronger, and it is feasible to comprehensively use GIS platform to manage power grid automation; The third is the feasibility of distributed small current grounding protection scheme. This is based on its high sensitivity and large carrying capacity.
7 conclusion
Through the above analysis, we can find that the automation of power grid system is an obvious trend, and the application of this technology can effectively promote the stability of power supply and create greater social benefits. With the development and innovation of China's electric power enterprises, it is an important direction to explore such projects, which is helpful to solve power grid operation faults and improve scientific layout. Therefore, it is of great significance for the research of power technology and the application of automation engineering.
refer to
[1] Pei Wen. On distribution automation and management of power system [J]. Heilongjiang Science and Technology Information, 20 1 1, (2 1).
Su junbin Technical analysis of urban distribution automation system [J]. Guangdong Science and Technology, 20 1 1, (18).