Currently, the aging of the population has become the world's social problems. The increasing aging population and lots of disability, paralysis makes nursing care more difficult. Because of many elderly can not g...
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Dynamic Voltage Restorer,as an important electric power device,used to deal with the voltage sag. In the front of the article,the voltage sag is introduced firstly,and then shows the basic structure and principle of D...
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Dynamic Voltage Restorer,as an important electric power device,used to deal with the voltage sag. In the front of the article,the voltage sag is introduced firstly,and then shows the basic structure and principle of Dynamic Voltage Restorer,research status,existing problems. Finally I will try to give the development trend of Dynamic Voltage Restorer.
Power system voltage stability is one of research hotpots in the field of electric power engineering. Firstly,the application of bifurcation theory in power system analysis is introduced. Secondly,static index which i...
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Power system voltage stability is one of research hotpots in the field of electric power engineering. Firstly,the application of bifurcation theory in power system analysis is introduced. Secondly,static index which is used frequently in power system analysis is given and the characteristics of every index are clarified in detail. Last,it introduces the analytical methods of dynamic voltage and makes prospect about the voltage stability analysis.
With the wide application of power electronic devices, especially the use of non-linear device, a large number of harmonics and reactive current injected into the grid, which will cause power grid pollution, and the p...
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With the wide application of power electronic devices, especially the use of non-linear device, a large number of harmonics and reactive current injected into the grid, which will cause power grid pollution, and the power quality problems have become increasingly seriousActive Power Filter(APF) is an important device for the power system harmonics and reactive power compensating The real-time control and accuracy is a key to achieving effective compensation Several suitable for active power filter's basic principle of the compensation current control strategy is introduced in this paper, the paper carries on the contrast analysis, and points out the advantages and disadvantages of each, The development of the control strategy of the active filter can achieve a better performance and a wider range of application
Smart Grid is very important as it will take us towards energy independence and environmentally sustainable economic growth. This paper briefly discusses evolution of Smart Grid development,including the difference fr...
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Smart Grid is very important as it will take us towards energy independence and environmentally sustainable economic growth. This paper briefly discusses evolution of Smart Grid development,including the difference from conventional energy system,the characteristics of Smart Grid,the present research status,and the key technologies and technologies of Smart Grid.
The dynamic voltage restorer(DVR), as an important electrical installation, can handle the voltage sags and stable the electrical power system. This paper talks about power system operation problems- Voltage dips, the...
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The dynamic voltage restorer(DVR), as an important electrical installation, can handle the voltage sags and stable the electrical power system. This paper talks about power system operation problems- Voltage dips, then briefly introduces Dynamic Voltage Restorer basic structure and principles, the then mainly complaint about the dynamic voltage restorer research. At last, it will give us a conclusion and the future development trend.
At present,the power system plays a vital role in China's national economy,therefore,power indicator problem of the system attracting much attention,reactive power and voltage as one of the light elements give eno...
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At present,the power system plays a vital role in China's national economy,therefore,power indicator problem of the system attracting much attention,reactive power and voltage as one of the light elements give enough weight,the stability of the system is not to be neglected,static synchronous compensator(STATCOM) is a member that has high precision control,fast response time,dynamic reactive compensation ability in flexible exchange transmission system devices. At the same time,it has become a hot topic in the study of reactive power compensation devices and a growing number of widely applied to power system.
As a key component of photovoltaic grid generation system,grid-connected inverter plays an important role,and its control is paid more attention to by people. After the introduction of principle and structure of grid-...
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As a key component of photovoltaic grid generation system,grid-connected inverter plays an important role,and its control is paid more attention to by people. After the introduction of principle and structure of grid-connected photovoltaic inverter,the paper describes the control objectives of grid-connected,represents several current control strategies of grid-connected inverter in detail,and indicates its future development trend finally.
Flexible AC transmission technology(FACTS) is a new technology developed in recent years. It use power electronic technology and modern control technology to achieve fast control for AC transmission system parameter a...
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Flexible AC transmission technology(FACTS) is a new technology developed in recent years. It use power electronic technology and modern control technology to achieve fast control for AC transmission system parameter and structure[1], to achieve the rational allocation of transmission power, reduce the power loss and the cost of power generation, greatly improve the stability and reliability of the system. STATCOM is based on the principle of reactive power compensation, using full-controlled switching devices to compose self-commutated inventer, complemented by small-capacity storage elements constitute reactive power compensation device. Its role in the power system is the compensation of reactive power, maintain the voltage of the connection point, improve system voltage stability, and improve the steady performance and dynamic performance of the system.
With the wide application of power electronic equipments in power system, more and more harmonic are poured into the power system, which cause power pollution and make the power quality problem increasingly serious. A...
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With the wide application of power electronic equipments in power system, more and more harmonic are poured into the power system, which cause power pollution and make the power quality problem increasingly serious. Active power filter(APF) is an important equipment to compensate harmonic and reactive current in power system. One of the key technologies lies in the real-time and accurate control. The fundamental principles of several control strategies of compensate current were presented, and the respective merit and demerit of these control strategies were pointed out with contrast analysis in this paper. Active power filter will achieve a higher performance and a wider application with the continuous development of the control strategy.
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