Electrical engineering and its automation have involved many fields
The theoretical basis for electrical engineering and its automation is often the law of electromagnetic induction, Kirchhoff's circuit law, etc., and it is related to a series of technical and scientific issues, such as the generation, transportation and use of electric energy, etc. Welcome to read automation Graduation thesis. Many renovation activities of the building are included in the electrical engineering, which greatly affects the structural performance of the building. At present, in the aspects of equipment operation and line connection, there are many problems in the electrical engineering structure of buildings, which have a great impact on the quality of building electrical engineering.
Therefore, electrical engineering automation design is very important in building structure. This paper mainly analyzes and discusses the automation design and implementation of building electrical engineering. Electrical engineering and its automation involve many fields, such as power electronics technology, computer technology, electrical machinery technology information and network control technology, etc. Therefore, electrical engineering and its automation integrate many aspects, it is a complex industry, the main feature is Combines strong and weak electricity, electromechanical, hardware and software, and so on.
Full-empty power electronic switch: Electronic power devices have experienced four generations, the first generation is thyristors, and they are still in use today; the second generation is fully-controlled devices, which are in AC frequency conversion technology. After that; the third generation is composite power electronic devices, namely IGBT and MGT; power integrated circuits, also known as PIC, are the fourth generation of power electronic devices. From the original low frequency to the current high frequency circuit: the replacement of the converter circuit is motivated by the development of power electronic devices;
However, when the DC converter is used in a common thyristor, the main control is to control the entire column, and the inverter used in the AC variable frequency drive is AC to DC and then to AC. When the second generation of power electronics replaced the original converter, it increased the adoption. During the development of PMW converters, many defects were gradually revealed. Therefore, high-frequency circuits gradually replaced the original low-frequency circuits.
General-purpose inverters put into use: Before the general-purpose inverter was put into use, it also experienced the first-generation functional U/F control type, high-performance second-generation U/F type and high dynamic performance inverter. State maintenance of electrical equipment is the detection and repair of electrical equipment when it is in a certain state. Online inspection systems are critical to electrical equipment condition maintenance technology. According to the data displayed by the online monitoring system, the technician can timely discover the abnormal problems and implement the fault repair plan as soon as possible. The main content has the following aspects:
Insulation performance has a great relationship with the safe operation of power systems. In China, during the construction of power grids, insulators running on the grid are used to design insulation monitoring systems, such as glass and composite insulators. These devices are easily affected by external variables. Therefore, the performance is weakened, and the operation of the electrical equipment can be stably performed, and the monitoring system can be equipped with the insulating element.
In the process of transmission, if there is a problem with the line, it will have a great impact on the normal supply of electrical energy. Therefore, in the state maintenance program, the lightning monitoring system should be rationally planned. For example, lightning rods can be installed. If the electrical equipment is struck by lightning, it can be monitored before and after the lightning strike, and it can also be protected. Electrical equipment or connecting lines are susceptible to environmental influences. The environmental monitoring system mainly monitors the atmospheric temperature and sulfur dioxide. If these factors are not conducive to the performance of the electrical equipment, an abnormal signal will be displayed on the monitoring system and communicated to the monitoring center. The technicians can take corresponding measures in time. maintain.
Sensing technology, after the maintenance personnel install the sensor on the electrical equipment, it can receive the relevant status signal of the equipment from time to time, which is helpful for accurately determining abnormal faults. In addition, it can effectively expand the monitoring range of electrical equipment and accurately capture signals, which can effectively improve the operation level of building electrical engineering automation. Communication technology. In the state maintenance operation, it is necessary to speed up the transmission of abnormal signals of electrical equipment to the control center, so that maintenance personnel can formulate the treatment plan as soon as possible. For example, digital transmission can use GMS or CDMA system. In this situation, control Personnel can timely understand the actual state of electrical engineering, which is conducive to real-time monitoring.
A good quality sensor can accurately capture the signal, and after the maintenance personnel process the signal, the induction signal of the electrical equipment with practical application significance should be screened out, which is beneficial to repair the later failure and ensure the smooth operation. Often, the powerful data processing capabilities of computers are widely used here to effectively integrate data resources.