In our country, energy conservation and emission reduction is promoted with great effort, and electric power market reform is also under advancement. Under this environment, DG (Distributed Generation) attracts more and more attention. DG causes the distributed network to turn from simple radial structure to complex structure containing a lot of power sources. The position and capacity as wel...

Transformer, as one of the most important and costly major apparatuses in the power system, is the hinge to transform electric energy in different voltage, whose running state will affect the safety and stability of the power system. It should be set corresponding protection. Recently, transformer protection is always in poor performance, which is far less than line protection and generator p...

This paper analyses the under frequency load shedding(UFLS)device in present electric power system.It points out that although the UFLS device today have been computerized in hardware,it is the same as traditional device in design idea and setting principle .On the basis of analysis on the dynamic frequency after power vacancy,the reason of unideal function of t...

By means of eigen-analysis , this paper presented the careful research for the damping characteristic of low frequency oscillation in power system . At the same time , this paper gived a great deal of simulation research for the total damping of system and the damping of electromechanical mode of the system using a useful tool in power system - SSAT (small signal analysis tool ).The conclusion...

The short-term load forecast is a key task to electric power systems’ daily operation. Precise forecast plays very important role to the economy and security of power systems.It has been a long time from beginning to research the forecast method by computer to now. Currently there are many forecast model that have been applied into real and made good economic utility. Among them, the Radial ...

While people studying in modern electric power systems, a reasonable accurate representation of load is necessary for power system stability and dynamic analysis. Load modeling is one of the most important cause effecting the precision and credibility of the simulation result.The thesis studies the load modeling methods and theories based on actual electric power network. At first, it introduc...

With the developments of our country\\\’s electric power industry and the progress of computer technology and communication technology, power distribution network automation system is applied widely to electric power industry. This thesis presents the research of power distribution network automation communication system based on OFDM modulation technology and Power Line Communication te...

The electric railway traction load is a large power commutating load of big fluctuating,It has the characteristics of three-phase dissymmetry、highly non-linear、big capacity、broad distributing、fluctuations and impact of the loaded power etc.Therefore,The electric railway traction load has a tremendous influence to the power system security and economical movement、compensating to the ...

The process of acquiring the energy surrounding a system and converting it into usable electrical energy is termed power harvesting. In the last few years, there has been a surge of research in the area of power harvesting. This increase in research has been brought on by the modern advances in wireless technology and low-power electronics such as microelectromechanical systems. The advances ...

Reactive power compensation and harmonic suppression of distribution network is a quite new research and practical domain, and along with unceasing enhancement of customer demand for electrical energy quality, it has caused more attention. Because STATCOM has more merits than SVC, such as responding much faster、the effect of raising voltage momentary stability better and with less harmony, ...