电力电子技术与电力传动是电气工程及自动化中的一门重要学科，也是电气一门

Power electronics and electric drive technology is an important discipline of electrical engineering and automation, and is also an important part of the electrical one, which requires us to carefully serious to learn this lesson, it is considered a secondary discipline, so, for power electronics and electric drive technology, we need to understand and have some practical solution to the problem and to understand some of the direction of development. <br>Power electronics technology in the power system also plays a pivotal role when the power system left the power electronics technology, the modernization of electricity will be difficult to be achieved. Construction of power systems development, has been supporting power electronics technology, the modernization of purpose can be achieved. Power transmission is based on the high-voltage transformer means, the voltage generated by the generator will then after boosting its output a new way. HVDC end position and the end position by electric, is generally used thyristor device which can avoid a large-capacity and long-distance transmission without power electronics technology, the system will cause the power loss problem occurs, the transmission of power electronics technology the system uses the technological foundation to provide good protection for the transmission. In the power distribution system, power electronic devices may also be used for controlling power quality, e.g., for use in flicker, etc. instantaneous power failure and a voltage drop in the power quality control, better guarantee the quality of the supply. Electronic power technology is widely used in transportation, DC, DC conversion technology has been widely used in the subway, and trolley buses in EMU. In use, we can better control the infinitely variable speed, improve quality control. In use, the most common presenting wherein the DC electric locomotive rectifying means selected locomotive as the power supply apparatus. However, if the variable frequency AC locomotives powered device, we do need the help of power electronics and electric drive and power control. For example: DC choppers are widely used in rail vehicles, power electronics technology uses magnetic levitation train in common, this is a good a technical requirement, the key technology use cases. With electric vehicles which will be used as a battery to provide energy, need to make electric drive control. Use then charge the battery, the power supply can not leave. Therefore, marine, aviation electronics technology can not be separated.

Power electronic technology and power transmission is an important subject in electrical engineering and automation, but also an important part of electrical, which requires us to study this lesson carefully, it is a secondary discipline, so, for power electronic technology and power transmission, We need to understand and master some practical problem-solving methods and understand some direction of development.<br>Power electronic technology also plays an important role in the power system, when the power system left power electronic technology, power modernization will be difficult to achieve. In the development of power system construction, it has been supported by electric power electronic technology, and the goal of modernization construction has been realized. High-voltage transmission is a new way for a power plant to raise the voltage emitted by a generator and then output it with the help of a transformer. The location of the High Voltage DC transmission end and the power edgy end position are generally used the thyristor converter device, which can avoid the large capacity and long-distance transmission if there is no power electronic technology, will lead to the loss of power system problems, power electronictechnology for the use of transmission system to lay a technical foundation, so as to provide a guarantee for good transmission. In distribution network systems, power electronics can also be used in power quality control, for example, in flash, instant power outages and voltage drops and other power quality control, to better guarantee the quality of power supply. Electronic power technology is widely used in transportation, DC, DC transformation technology is widely used in subways, moving cars and trolleybuses. In use, you can better control the poleless speed, improve the quality of control. In use, the most common manifestation is that dc locomotives in electric locomotives choose the rectifier as the power supply device. However, if the AC locomotive is powered by a variable frequency device, it needs to be powered by electric power electronics and power control. For example: DC chopper is widely used in rail vehicles, common magnetic levitation trains in the use of electric electronic technology, which is a technical requirements better, the key technology use case. Electric vehicles are used as batteries to provide energy and require electric drive control. Then use the battery to charge and not leave the power supply. Therefore, navigation, aviation can not be separated from electronic technology.

Power electronic technology and power transmission is an important subject in electrical engineering and automation, and also an important part of electrical engineering. This requires us to study this course carefully, which is a secondary subject. Therefore, for power electronic technology and power transmission, we need to understand and master some practical solutions and understand some development Direction.<br>Power electronic technology also plays an important role in the power system. When the power system leaves the power electronic technology, the power modernization will be difficult to achieve. In the development of power system construction, the power electronic technology support is obtained, and the goal of modernization construction is realized. High voltage transmission is a new way that the power plant uses the transformer to boost the voltage from the generator and then output it. The position of HVDC transmission end and receiving end generally use thyristor converter, which can avoid the loss of power system if there is no power electronic technology for large capacity and long-distance transmission. Power electronic technology lays a technical foundation for the use of transmission system, thus providing a guarantee for good transmission. In the distribution network system, power electronic devices can also be used in power quality control, for example, in the power quality control of flicker, instantaneous power failure and voltage drop, to better ensure the quality of power supply. Electronic power technology is widely used in transportation, DC, DC conversion technology is widely used in subway, motor car and trolleybus. In use, it can better control the stepless speed change and improve the control quality. In use, the most common performance is that the DC locomotive in the electric locomotive chooses the rectifier as the power supply equipment. However, if the AC locomotive uses frequency conversion device for power supply, it needs to use the power electronic device to do a good job in electric drive and electric control. For example, DC chopper is widely used in rail vehicles, and power electronic technology is commonly used in maglev trains, which is a key technology application case with better technical requirements. With the help of electric vehicle as the battery to provide energy, we need to do a good job in electric drive control. Then use the battery for charging and do not leave the power supply. Therefore, navigation and aviation are inseparable from electronic technology.<br>