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Due to the increase of the train velocity, the pantograph-catenary arc occurs even more frequently, which results in severe erosion on the pantograph pan and the catenary wire. This leads to a serious threat to the normal operation of the pantograph-catenary system. As the level of the arc erosion has a close relationship with its energy, it is necessary to study the influencing factors and suppression...
The most important concern regarding a power system is the quality of its power. The main cause of most of the issues is nonlinear loads only. Shunt Active Power Filter (SAPF) has turned out to be a good solution to solve this problem because of its ability to fulfill the harmonic and reactive power components demand of the nonlinear loads. This paper presents comprehensive analysis of comparison...
Optimal reactive power compensation has become an important issue to Indian power system due to initiatives taken towards national grid formation in the country. Presently new grid and southern grid are running in asynchronous mode. Central Transmission Utility (CTU) has forced the regional or state grids to maintain their reactive power compensation as per the requirement of grid as specified in...
This paper presents a nonlinear control of dc-bus voltage, active and reactive powers for wind power grid connected Voltage Source Inverter (VSI). The controller exploits the backstepping scheme to calculate the required inverter's control to eliminate the instantaneous errors of dc-link voltage, active and reactive powers. The nonlinear control can increase the system effectiveness and realize voltage...
Static Synchronous Compensator (STATCOM) is one of the key device and key technology of FACTS. It can not only compensate the reactive power of electric power system, but also improve the property of steady state and dynamic state. This paper presents a STATCOM based on controlled reactor because of the STATCOM being used at present has some disadvantages. Then it can compensate much more reactive...
The fundamental theory and control methods of Active Power Factor Correction (short for APFC) are introduced in this paper. It analyzes and studies the APFC based on the average current control single-phase Boost type APFC circuit. In addition, the simulation model is built on the MATLAB and the results are shown in this paper. The results show the average current control single-phase Boost type APFC...
Wind power, as an important and promising renewable resource, is widely studied. Because the wind is highly variable, it is very desirable to operate a wind turbine at variable speeds. In this respect, doubly fed induction generator (DFIG) has become popular in wind power generation system. The steady state simulation analysis of a DFIG is essential to understand the behavior of DFIG such that it...
A design example of voltage and reactive power fuzzy logic controller for 110 kV substation based on MATLAB is done in this paper. 56 fuzzy control rules are extracted on the basis of nine-area diagram divided the area of prior switching of capacitors. MATLAB fuzzy logic toolbox is used to build fuzzy logic controller's fuzzy inference system and MATLAB SimPowerSystems Blockset is used to set up a...
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