Electrical engineering and its automation have involved many fields
The theoretical basis of electrical engineering and its automation is often the law of electromagnetic induction, Kirchhoff's circuit law, etc., and is related to a series of technical and scientific issues, such as the generation, transportation and use of electric energy. Welcome to read the graduation thesis of automation. Many reconstruction activities of buildings are included in the electrical engineering, which greatly affects the structural performance of buildings. At present, in terms of equipment operation and line connection, there are many problems existing in the structure of building electrical engineering, which have a great impact on the quality of building electrical engineering renovation.
Therefore, electrical engineering automation design is of great significance in building structure. This paper mainly analyzes and discusses the design and implementation of building electrical engineering automation. Electrical engineering and its automation involve many fields, such as power electronics technology, computer technology, electrical and electrical technology information and network control technology, etc. Therefore, electrical engineering and its automation integrate many aspects and is a complex industry, with the main characteristics of combining strong and weak current, electromechanical, software and hardware, etc.
All-empty power electronic switch: to some extent, electronic power devices have experienced four generations, the first generation is thyristor, and still in use today; The second generation is a fully controlled device, which emerged after the AC frequency conversion technology; The third generation is composite power electronic devices, namely IGBT and MGT; Power integrated circuit (PIC) is the fourth generation of power electronic devices. From the original low frequency circuit to the current high frequency circuit: the replacement of converter circuit is driven by the development of power electronic devices;
However, when DC converter is used in common thyristor, it mainly controls the whole train mutually, while the frequency converter mode used in AC variable frequency drive is AC to DC and then to AC. When the second generation power electronic devices replace the original converter, they are used more. During the development of PMW converter, many defects are gradually revealed. Therefore, high-frequency circuit gradually replaces the original low-frequency circuit.
General frequency converter put into use: before the general frequency converter was put into use, it also experienced the first generation of functional U/F control type, the second generation of high functional U/F type and high dynamic performance frequency converter. Condition-based maintenance of electrical equipment refers to the detection and maintenance of electrical equipment when it is in a certain state. For the condition maintenance technology of electrical equipment, online detection system is very important. According to the data displayed by the online monitoring system, technicians can find the abnormal problems in time and implement the fault maintenance plan as soon as possible. The main contents are as follows:
The insulation performance has a great impact on the safe operation of the power system. During the construction of the power grid in China, the insulation monitoring system is designed by using insulators that are operated on the grid, such as glass, composite insulators, etc. These devices are easily affected by external factors, thus weakening their performance. In order to ensure the stable operation of electrical equipment, the insulation components can be equipped with a monitoring system.
In the process of transmission, if there is a problem in the line, it will have a great impact on the normal supply of electric energy. Therefore, in the condition-based maintenance scheme, the lightning monitoring system should be reasonably planned. For example, if the lightning rod is installed, the electrical equipment can be monitored before and after the lightning stroke, and it can also be protected. Electrical equipment or connecting lines are easily affected by the environment. The environmental monitoring system mainly monitors the atmospheric temperature, sulfur dioxide, etc. If these factors are not conducive to the performance of electrical equipment, there will be abnormal signals displayed on the monitoring system and communicated to the monitoring center, so that technicians can take corresponding measures in time to implement maintenance.
Sensor technology, after the maintenance personnel install the sensor on the electrical equipment, they can receive the relevant status signals of the equipment from time to time, which is conducive to accurately judge the abnormal fault. In addition, it can effectively expand the monitoring range of electrical equipment, accurately capture signals, and effectively improve the operation level of building electrical engineering automation. communications technology. During the condition maintenance operation, the speed of abnormal signal transmission of electrical equipment to the control center should be accelerated so that the maintenance personnel can work out the treatment plan as soon as possible. For example, the digital transmission can use GMS or CDMA system. In this situation, the control personnel can understand the actual status of electrical engineering in time, which is conducive to real-time monitoring.
The sensor with good quality can accurately capture the signal, and after the maintenance personnel process the signal, the electrical equipment induction signal with practical application significance should be screened out, which is conducive to the maintenance of later failures and ensure the smooth progress of the work. Generally, the powerful data processing ability of computers is widely used here, which can effectively integrate and process data resources.