Power system is an electric energy production and consumption system composed of power plants, power transmission and transformation lines, power supply and distribution stations and electricity consumption. The following is my paper on power system and its automation. Welcome to read the reference!
With the rapid growth of China's economy, the requirements for China's current automation technology are getting higher and higher. This paper introduces and analyzes the development direction of power system automation application, security and integrated automation, and makes a simple discussion on the application of power system automation technology.
Electric power system; Application; Development direction; technology
1 application of power system automation technology
1. 1 power system automation application
Power system is closely related to people's daily life, and it usually works 24 hours a day. Therefore, any new technology that can ensure the normal operation of power system is worth popularizing. Among them, automation technology is particularly prominent. The earliest application of automation in electric power is mainly to monitor the data of power system to ensure safety. With the development of information technology, material technology and management technology, the application of automation technology is more and more extensive.
1.2 power system automation workflow
The workflow of power system automation specifically includes the following contents.
1) The central computer is responsible for overall regulation, and the related monitoring devices are mainly responsible for recording accident contents and equipment operation, recording and processing related to the preparation of various reports, automation related to daily operation, and automatic recovery of system abnormal accidents. On this basis, with the control of components as the center, through the combination of computers and the combination of control computers and terminal hardware devices, various kinds of software are used to expand the control range and deepen the degree of automation.
2) Integrated automation of power system, the basic process is to install modern computers in some control centers in the corresponding central area, so as to radiate the network system around, and set up remote monitoring and control devices for information service and feedback between substations and power plants around this center, and monitor them from time to time, so as to realize the coverage of three-dimensional network and form a comprehensive and smooth instruction transmission and information transmission.
3) The integrated automation of power system adopts the related operation mode of hierarchical control, that is, the control functions are shared and comprehensively coordinated among control stations, dispatching stations, substations and power plants according to the functional scope under their jurisdiction, so as to achieve the reasonable, economical and reliable operation of the system.
2 power system automation technology application ability
2. 1 data processing capacity
1) data integration capability. The development and formation of power system is driven by the demand of market economy. For example, at the peak of electricity consumption, increase the voltage of substation and increase the output power; When the power consumption is low, reduce the power of the substation. This can not only meet the needs of users, but also greatly reduce the loss and cost. Moreover, whether the system is based on professional power system automation platform or related general technology platform, as the requirement of multi-level and cross-domain scientific decision-making and efficient operation, more standardized information sharing and dynamic and multi-dimensional application analysis are needed.
The main ways of data integration are: ① strengthening the automation and informatization of power system. Strengthening the operability of data, allowing users to support related user interfaces with icons, and enabling those object-oriented data models to correspond to objective objects related to power systems will greatly improve the operability and readability. Because the automatic operation of power system is a process with high real-time requirements, the expansibility and development of the system are enhanced by adjusting the system code and specifically defining the data type and operation method you need. ② Strengthen the functions of electric power enterprises and improve the database. For power enterprises, the power system platform needs to effectively provide distributed application services. All localities can maintain and manage the data within their respective jurisdictions. At the same time, related databases at different levels can also form that kind of distributed database, and you can enjoy data from other places through network calls and * * *. Within a given authority, based on decentralized data management and storage, the security and real-time performance of data can be guaranteed. Improve the database. By using various databases to store and manage various data, its data backup mechanism and security mechanism are incomparable with other file management methods.
2) data * * * ability. With the development of power system automation technology, the system model usually focuses on the description of related geographical and spatial attributes, but in practical related applications, the controlled objects in the power system usually have more complex power processing structures. Therefore, it is very necessary to establish a model of the unique spatial attributes of power system. Moreover, for some semantic data sharing, the most basic requirement is that the supply and demand sides have the same understanding of the same data. Only based on this abstract understanding can this be guaranteed. Therefore, in the process of data sharing, it is necessary to have a basic model of power system as the basis of data sharing between different departments.
2.2 Security and stability capability
Power application is a pillar in the process of social and economic development, and it is also a real-time related system. At the same time, its safety and stability are also the primary considerations.
1) automatic safety monitoring capability. Because people can't concentrate for 24 hours, the ability of automatic monitoring is particularly important. The automatic monitoring ability of power system is different from other systems because other systems only need to reflect and record objective phenomena and data; However, the automatic monitoring system of power system should not only reflect the objective facts, but also warn the potential risks.
2) Automation security capability. Power system has the characteristics of different types and scales of data and users can't crash, and it needs flexible recovery mechanism, so it is extremely useful for security. The application of its support capability includes: ① ensuring the daily operation of power system. This mainly means that the automation system can adjust the production of the whole power system to a certain extent through the system setting. This can greatly reduce the workload and risk of staff; ② Ensure the timely storage and recovery of power data. The daily recorded data is of great significance for making the power station budget, saving costs, updating the system and correcting the safety index. ③ Ensure the safety of employees. Because the automation system has the monitoring function, when the system is abnormal, especially when there are life-threatening security risks, the automation system can take corresponding measures to reduce the risks.
3 development direction of integrated automation of power system
For the integrated automation technology of China's power system, its development direction is to establish an integrated DMS system and improve the level of integrated power management to meet the needs of the development of modern power system technology. Optimize the protection control of electrical equipment, eliminate large-scale power failure and improve the reliability of power supply system; Establish a rapid handling mechanism for electrical accidents to minimize the power outage time and greatly reduce the impact on production devices; For managers, enterprises can grasp the operation and current of the whole power system in time. Various types of operating parameters, such as electric quantity, voltage and power, have related effects on power balance, accurate measurement, load monitoring and other functions; It has changed the duty mode and operation mode of the current substation, realized the real unattended substation management mode, and achieved the purpose of greatly reducing staff and increasing efficiency.
As a main feature of substation automation, data sharing is one of the main ways to realize data sharing by integrating monitoring and protection functions in the same device. As far as SCADA is concerned, a lot of data it needs is the same as that processed by relay protection. Therefore, it is very economical to integrate distributed substation SCADA into related microcomputer protection, so that monitoring and protection can be used in a hardware platform.
4 conclusion
Substation automation system is the core system of substation, which is very important for the safe operation of power grid and substation. This paper briefly introduces and analyzes the application of power system automation, the safety of power system and the development direction of power system integrated automation, in order to learn and make progress with the majority of workers.
Power system and its automation paper 2 Abstract: Discussion on the application of power system and its automation technology At present, in order to ensure the normal operation of society, the demand for electric energy is increasing, which promotes the construction of power plants. In power plant construction, the position of power system is very critical, because the safety and stability of power system operation is an important guarantee for power generation effect. Under this premise, power automation technology
Keywords: power system automation papers published
At present, in order to ensure the normal operation of society, the demand for electric energy is increasing, which promotes the construction of power plants. In power plant construction, the position of power system is very critical, because the safety and stability of power system operation is an important guarantee for power generation effect. On this premise, automation technology has been widely used in the power system, and is becoming more and more perfect, which ensures the safety of power plant operation and power generation efficiency, and also reduces the workload of staff.
First, explain the power system and its automation technology.
The application of automation technology in power system greatly improves the overall management effect of the system, and can automatically deal with various faults during the operation of the system, effectively improving the stability and security of the power system. This link mainly expounds the power system and its automation technology, and analyzes the composition and basic requirements of the system respectively.
1, composition of power system and its automation
The application of automation technology in power system needs more equipment to cooperate with each other, and the central computer is in the core position. At the same time, central computers are distributed all over the country, and feedback monitoring is carried out in the power plant. With the assistance of information service equipment, data and related orders can be accurately issued. The central computer performs the overall adjustment and control of the system, but the tasks of the monitoring device are general automation technology, abnormal state recovery and the processing of some reports. Generally speaking, the control mode of automation technology belongs to hierarchical control, that is, hierarchical control of power plant organization, operation and scheduling is used to coordinate, integrate and undertake based on its own functions to ensure the economic and scientific operation of the system.
2. Basic requirements of power system and its automation.
In order to ensure the safety and stability of power system operation, automation technology should have the following functions: first, it can collect the working parameters of related equipment in the system in real time and accurately, and report the control and coordination decision to the operators on the premise of meeting the prescribed standards of safety and economy; Secondly, the equipment at all levels of the power system can be regulated to ensure that it can be in the best operating state, so as to achieve the standard of safe, economical and high-quality power supply; Thirdly, the application of automation technology requires that sudden power failure and safety failure can be handled in the first time, and the losses caused by safety failure can be reduced as much as possible, and the system functions can be continuously improved and optimized.
Second, the application of power system and its automation technology.
The practical application of automation technology in power system is usually reflected in the automatic processing of information and the safety of power system operation. Therefore, the application of automation technology in power system has obviously improved the automation degree of the system. Let's analyze it in detail.
1, automatic disposal information
In the process of automatic information processing, there are two links: information synthesis and information sharing.
1. 1 information synthesis
Information synthesis plays an extremely critical role, mainly because the progress and development of the system are closely related to the demand. For example, the electricity consumption in cities and towns is relatively high, and in order to meet the electricity demand, the power supply voltage should be increased; If the urban electricity demand is relatively low, the output power should be reduced as much as possible in order to meet the fundamental requirements of electricity users. No matter how its regulation performance is realized, it is necessary to conduct all-round and dynamic research on the electricity consumption information of power users, and use information synthesis to ensure the normal realization of seamless connection. There are usually the following ways to realize information integration: First, improve the automation level of the system. Improving the level of power system and its automation technology can effectively improve the operability of information and ensure the best customer interface. At the same time, it can meet the mutual correspondence between the data model and the objective objectives of the system, thus improving the operability and readability of the power system. In addition, the normal operation of power system and its automation technology set relatively strict standards for timeliness, and these standards can be adjusted by applying codes to improve the scalability of power system. Second, it can improve the overall function of the power plant. The system can meet the requirements of distributed applications and realize independent monitoring and maintenance of information in the region. If there are differences in database levels, a distributed database can be established. And with the support of the network, enjoy and retrieve information, and ensure the security and timeliness of information within the scope of authority; Third, improve the power system database. In order to ensure information security, the monitoring and storage functions of the database are applied.
1.2 information * * *
To realize information sharing, it is necessary to ensure that information providers and demanders have the same understanding of information. Complex power system layout structure is an important feature of system control objectives, and the improvement of automation makes the setting standards of spatial attributes more stringent. The power system model also describes space, so it is particularly critical to change the original model into a space model owned by the system alone. At the same time, in order to share the information in the power system reasonably, the fundamental stipulation is to ensure that the information of the supply and demand sides is consistent and the understanding of the information is unified. Unless this is the case, the information sharing standard can be effectively realized. At this stage, it is necessary to establish the basic model of the system first and set up various institutions to implement information sharing more effectively. It includes the following aspects: firstly, accurately define and express the geometric features of geographical entities, including the geometric features of all spaces covered by service system and the geometric features of spaces covered by system services; Secondly, express and accurately define physical characteristics. As far as the current power system is concerned, on the one hand, it includes the physical structure, on the other hand, it constitutes the data sharing and dynamic multi-dimensional research of various components, equipment, overall physical attributes and operation specifications in the system.
2. Power system security system and its automation technology.
2. 1 power system safety monitoring
Because of the energy of power plant employees, it is impossible to ensure the attention all the time, so the automatic monitoring scheme of power system becomes particularly critical. The difference between this system and other systems is that it can not only reflect the actual situation in real time and accurately, but also find the dangers in the system and give a warning, which is of great significance for finding system accidents as early as possible and effectively preventing system problems, while other systems only have the performance of reflecting and recording. For example, in the peak period of urban electricity consumption, when the temperature of the generator set is relatively low and the operating power is extremely low, it is necessary to rely on the safe operation monitoring system to monitor and alarm in real time to warn the occurrence of faults, so that relevant personnel can repair such faults and ensure the system to return to normal working condition.
2.2 Power system security assurance
Power system and its automation technology can handle all kinds of information and targets of various scales, and have a practical and flexible recovery system, which plays a vital role in the security and stability of system operation. This function can generally be divided into the following aspects: first, it can effectively ensure the stability of the system, usually by implementing special settings in the power system to ensure that automation technology can adjust and dispose of the overall power generation of the power plant, which can greatly reduce the workload of power plant personnel and the possibility of accidents in the system; Secondly, it can effectively ensure the real-time storage and recovery of system information, which is the premise of cost budgeting, cost control, updating the system and formulating operational safety standards for power plants. Therefore, the function of automatic technology to record information is particularly critical; Third, ensure the safety of power plant personnel. Because the power system automation technology can monitor the system in real time, if the power system fails, especially when it threatens the life safety of workers, the power system and its automation technology can choose corresponding schemes to reduce the risk factor. For example, if the workshop temperature exceeds 30 degrees Celsius, the system will turn on the ventilation device to cool down; If there is an open flame, the automatic machine system will actively turn on the fire fighting system to eliminate the open flame in time; If the equipment temperature is too high, the automatic system will automatically reduce the power to a reasonable value to prevent the equipment from being damaged and exploded. Because ensuring the personal safety of workers is the basis of safe power generation in power plants, this function also belongs to a great advantage of power system and its automation technology application.
Summary: As mentioned above, power system and its automation technology have been widely used in power plants, which can monitor the whole process of power system, on the one hand, improve the management effect of power plants, on the other hand, reduce the workload of staff, and achieve remarkable results. Driven by science and technology, the power system will develop more healthily and steadily, thus improving the overall level of China's power industry.
Abstract: With the rapid development of information technology, microelectronics technology and power electronics technology, electric drive control has gone out of the factory, and it is difficult for the modern production line automation system of all control equipment to control the traditional electric drive. Therefore, the improvement of electronic technology and automation technology has been widely used in many fields, such as farms, offices and household appliances.
Keywords: computer PLC power automation power system application
1. Application of computer technology in power system automation
Computer control technology plays a vital role in power system. This is due to the rapid development of computer technology, the new generation of power systems and other important aspects, all need transmission, distribution and transformation links to support computer technology, which will also make the power system automation technology develop rapidly.
With the application of computer technology in smart grid technology, information management system, power system automation technology and intelligent control of computer technology are formed, which is one of the most widely used technologies in smart grid technology, but there is only one typical technology at most, covering all aspects of distribution, transmission, users, dispatching and power generation. Among them, substation automation system, stability control system and computer technology have been widely used in this system, as well as dispatching automation system and flexible AC transmission system. Now it can be said that this kind of digital power grid construction is the embryonic form of smart grid to some extent. In fact, the preparatory work is the construction of smart grid in China. Typical smart grid communication technology also relies heavily on computer technology in the construction process. You need to have real-time, two-way, reliable functions and the application of advanced modern network communication technology, and the system completely depends on the existence of computer technology and has an information management system.
It can be said that the application of substation integrated automation technology to realize substation automation depends on the implementation and development of modern computer technology in power production, and automated substation is an indispensable and important aspect. Relying on computer technology, the automatic substation has been fully utilized in the process of realizing computers, and the secondary equipment will also be integrated, networked, digitized and fully utilized, instead of power signal computer cables or optical fiber cables. Substation automation, computer screen and other two components of automatic recording, management and operation are operation and monitoring. Comprehensive automation of substation can be realized, which is a part of computer automation management.
Application automation of dispatching automation is an important part of electric power dispatching automation system. China divides dispatching automation into five levels, including grid-level automatic dispatching, and the application of computer technology can not be separated from high to low: national grid, regional, provincial, district and county dispatching. The most important part is the computer network system of power grid dispatching control center, which constitutes an automatic dispatching system connected with the whole combined power grid in a computer system. Other main components include workstations, servers, terminal substation equipment, and power generation within the scope of dispatching large-screen display shielding and printing equipment. Computer dispatching not only plays the role of automation, so as to realize the safe operation analysis of the monitored power grid, realize real-time data acquisition, but also realize the functions of power system load prediction and state estimation. So these are all measured and controlled, and the lower power control center and other equipment pass through the WAN link dedicated to the power system.
2. The application of 2.PLC technology in power system automation.
PLC is a combination of computer technology and control technology, which uses programmable memory to store, calculate and record operation instructions to control each relay contact. This technology is used in industrial environment and the design of programmable logic controller system. This technology is widely used. In recent years, power system automation has solved the shortcomings of complex wiring, poor flexibility and low reliability of traditional control systems.
Data processing PLC programmable controller technology can complete data acquisition, analysis and processing, and has the functions of sorting, searching, mathematical operation, data conversion, data transmission and bit operation. Available communication functions send these data to other intelligent devices, and can realize control operation, compare with reference values stored in memory, or print and make tables. The data can be used in process control systems and flexible manufacturing systems commonly used in large control systems, such as unmanned control.
With the continuous progress of PLC control technology and the deepening of reform, the auxiliary system of large thermal power plants has been upgraded to the original relay controller PLC control system in recent years. Reducing resource consumption and improving efficiency in the production process has become the ultimate goal of every enterprise management. Therefore, with the progress of science and technology, the business support related to automation control also puts forward higher requirements for similar workshop-level power plants. PLC control system can be used for independent control, only through the process information module, and can be connected to the communication bus to coordinate the whole factory production.
3. The application of electrical automation in power system.
Electrical automation technology is the most active and optimistic technology in the world today. The development of various high-tech complexes in power system can not be ignored. The following describes the application of power system automation.
3. 1 Application of automatic control technology in power system
3. 1. 1 substation automation
The characteristics of effective control and comprehensive monitoring of substations are that, except for operation, substations used computerized equipment instead of traditional electromagnetic equipment, and substations used automatic electrical equipment, which can also be regarded as an indispensable part of the modernization of dispatching automation power production, which is a very important aspect.
3. 1.2 automatic power grid dispatching
The main function of WAN is to collect real-time data in the process of power production, analyze and monitor the security of power grid operation, predict the normal load operation in time and evaluate the power system.
3.2 Research direction of electrical automation
3.2. 1 substation intelligent protection
In foreign countries, a series of new technologies, such as automatic control theory, network communication and artificial intelligence, will be integrated to make the protection device have intelligent control function, which can comprehensively improve the overall safety level of the power system.
3.2.2 China electric power industry implementation strategy
Based on the overall situation of the whole power market and economic development in China, and the demand of the power sector for the overall power market model, a detailed study is made. After making it clear, the power operation proposed by the specific process and our actual power line market operation mode can put forward targeted solutions according to the actual problems found every day.
3.2.3 Overall analysis and specific control of power system
The theory and technology of power system stability control based on online measurement are studied, the phase angle is measured, and the methods of power system oscillation and suppression are explored. Automatic simulation method is used to select small current grounding mode, power grid dispatching, research institutions and generator speed control tracking technology, which is flexible in data acquisition and monitoring, reducing control strategy, load forecasting method and fault diagnosis theory and technology. In the new model and the application of nonlinear control theory and wavelet theory in power system, as well as the new methods to analyze power system and other new theories, new algorithms and clear research under the condition of realizing power market.
3.2.4 Distribution network automation
A major breakthrough has been made in the digital electronic carrier of low-voltage network such as geographic information integration of distribution network and advanced software application. DSP digital signal processing technology greatly improves the receiving sensitivity of operators, thus truly solving the problems of attenuation and interference between this carrier and power grid applications. Advanced application software distribution network model actual operation of power grid distribution network
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To sum up, electrical automation has become the most active, vital and comprehensive discipline in the world and occupies an important position in the power system. Therefore, the staff should conduct in-depth research and exploration, and at the same time combine their rich work experience in their work, which can greatly improve electrical safety. So as to ensure the working safety of the power system to the maximum extent.
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