Analysis on the application of the technology of electric power and electric automation
2016-10-25
In order to provide a very important guarantee for power enterprises to achieve automated production, we should continue to focus on strengthening the application of electrical automation components technology. The level of development of China's electric power industry depends largely on the level of automation of electric power. In today's society, the level of computer technology is more and more high, in a considerable part of the field of power automatic control has been very widely used. These areas include: farms, factories, household appliances, transportation, office and so on. Since the reform and opening up, China's market economy continues to improve, in order to adapt to market development needs, power enterprises should pay attention to and emphasize the automation of production, so as to provide a powerful support for promoting the economic benefit of power enterprises to improve.
1 the origin and significance of the research on the electric power automation components
Since joining the world trade organization, China has been in a period of economic boom, which has created a good opportunity for the development of China's power enterprises, but at the same time, the power enterprises are facing a lot of challenges. The competition between domestic electric power enterprises is becoming more and more fierce, and the competition of the international power market is also facing great pressure of competition. Compared with the large international electric power enterprise, no matter from the level of automation, production mode, application of science and technology, scientific management, electric power enterprises in China there is a huge gap, greatly reduced the market share, hinder the development of the power enterprises' long-term. In order to ensure the quality of power products, electric power enterprises to continuously improve the level of automation of electric power, can greatly reduce the defect. In order to promote China's electric power enterprise's overall competitive ability increased, should continue to strengthen the research of power automation, the in-depth study of China's electric power, so as to meet the demand of economy and society, to achieve a healthy and stable China's power enterprises and sustainable development.
2 major electrical and automation components technology
Based on the understanding, the next is in origin and meaning of the research of power electrical automation, introduces three main electric power automation components technology, in order to improve the level of the actual electric power automation components technology application.
2.1 fully controlled power electronic switch to replace semi controlled thyristor
The successful development and application of the thyristor controlling the motion of the new milepost, so far, the thyristor in AC and DC drive control system was the main reason is the widely used thyristor is the first generation of electrical devices. Since the AC frequency conversion technology has been popular, MOSEFT - GTR, P, GTO and other fully controlled devices one immediately after the emergence of A. The MOSEFT - GTR, P, GTO and so on are the main manifestations of the second generation of electric power devices. From the current view, in many cases will be in different time to produce the corresponding switch and current quota, a wide range of devices have different range of application. GTR GTO, lead to the gate control circuit of the increasingly large scale, is the main reason to promote the further development of the structure of MOS power semiconductor devices: the two fully controlled device with control current is very strong, also called bipolar full controlled devices. Generally speaking, the MOSFET thyristor is integrated in the MOS control of the single cell inside, only the full use of MOS, can the thyristor switch off and on for the corresponding control.
2.2 converter circuit from low frequency to high frequency development
From the current view, the PWM converter has been widely used in the second generation of power electrical devices. Power factor to obtain the corresponding increase, and greatly reduce the high harmonic to the power grid caused some impact, which is mainly due to the use of the PWM method. To a great extent, a series of problems caused by the torque ripple in low frequency area are properly solved. It is not difficult to find that one of the main causes of noise is the motor winding caused a lot of vibration. To a large extent, the stator and rotor are affected by the force of the torque ripple, which is often derived from the current and voltage harmonics in the PWM inverter. To some extent, the main reason that the frequency of the inverter can not get the corresponding improvement is that the switching losses are limited.
2.3 the theory of AC speed regulation is more and more mature
By imitating the method of DC motor control to a certain extent, respectively the torque and magnetic components of the stator current of the corresponding control, but the precondition is that it must be both decoupling, which is the main form of the basic idea of vector control. In fact, the decoupling is equivalent to the form of DC motor, which is the form of the DC motor to promote the transformation of the physical model of the induction motor. The detection of rotor flux orientation is one of the decoupling tasks that must be completed at the same time the rotor parameters will greatly influence the performance of decoupling, here it is further noted that influence the performance of the rotor circuit time constant of decoupling will be greater. In addition, it is difficult to achieve the desired results of the AC speed control effect is difficult to achieve the desired effect is one of the main factors is the vector rotation transformation has a certain complexity.
3 conclusion
All in all, the application of electrical automation element technology is very important and significant. The practical application of the combination of electric power automation components technology, based on in-depth understanding of the causes of power electrical automation on the systematic exposition of several major electric power automation components technology, the main
1 the origin and significance of the research on the electric power automation components
Since joining the world trade organization, China has been in a period of economic boom, which has created a good opportunity for the development of China's power enterprises, but at the same time, the power enterprises are facing a lot of challenges. The competition between domestic electric power enterprises is becoming more and more fierce, and the competition of the international power market is also facing great pressure of competition. Compared with the large international electric power enterprise, no matter from the level of automation, production mode, application of science and technology, scientific management, electric power enterprises in China there is a huge gap, greatly reduced the market share, hinder the development of the power enterprises' long-term. In order to ensure the quality of power products, electric power enterprises to continuously improve the level of automation of electric power, can greatly reduce the defect. In order to promote China's electric power enterprise's overall competitive ability increased, should continue to strengthen the research of power automation, the in-depth study of China's electric power, so as to meet the demand of economy and society, to achieve a healthy and stable China's power enterprises and sustainable development.
2 major electrical and automation components technology
Based on the understanding, the next is in origin and meaning of the research of power electrical automation, introduces three main electric power automation components technology, in order to improve the level of the actual electric power automation components technology application.
2.1 fully controlled power electronic switch to replace semi controlled thyristor
The successful development and application of the thyristor controlling the motion of the new milepost, so far, the thyristor in AC and DC drive control system was the main reason is the widely used thyristor is the first generation of electrical devices. Since the AC frequency conversion technology has been popular, MOSEFT - GTR, P, GTO and other fully controlled devices one immediately after the emergence of A. The MOSEFT - GTR, P, GTO and so on are the main manifestations of the second generation of electric power devices. From the current view, in many cases will be in different time to produce the corresponding switch and current quota, a wide range of devices have different range of application. GTR GTO, lead to the gate control circuit of the increasingly large scale, is the main reason to promote the further development of the structure of MOS power semiconductor devices: the two fully controlled device with control current is very strong, also called bipolar full controlled devices. Generally speaking, the MOSFET thyristor is integrated in the MOS control of the single cell inside, only the full use of MOS, can the thyristor switch off and on for the corresponding control.
2.2 converter circuit from low frequency to high frequency development
From the current view, the PWM converter has been widely used in the second generation of power electrical devices. Power factor to obtain the corresponding increase, and greatly reduce the high harmonic to the power grid caused some impact, which is mainly due to the use of the PWM method. To a great extent, a series of problems caused by the torque ripple in low frequency area are properly solved. It is not difficult to find that one of the main causes of noise is the motor winding caused a lot of vibration. To a large extent, the stator and rotor are affected by the force of the torque ripple, which is often derived from the current and voltage harmonics in the PWM inverter. To some extent, the main reason that the frequency of the inverter can not get the corresponding improvement is that the switching losses are limited.
2.3 the theory of AC speed regulation is more and more mature
By imitating the method of DC motor control to a certain extent, respectively the torque and magnetic components of the stator current of the corresponding control, but the precondition is that it must be both decoupling, which is the main form of the basic idea of vector control. In fact, the decoupling is equivalent to the form of DC motor, which is the form of the DC motor to promote the transformation of the physical model of the induction motor. The detection of rotor flux orientation is one of the decoupling tasks that must be completed at the same time the rotor parameters will greatly influence the performance of decoupling, here it is further noted that influence the performance of the rotor circuit time constant of decoupling will be greater. In addition, it is difficult to achieve the desired results of the AC speed control effect is difficult to achieve the desired effect is one of the main factors is the vector rotation transformation has a certain complexity.
3 conclusion
All in all, the application of electrical automation element technology is very important and significant. The practical application of the combination of electric power automation components technology, based on in-depth understanding of the causes of power electrical automation on the systematic exposition of several major electric power automation components technology, the main
