The Infona portal uses cookies, i.e. strings of text saved by a browser on the user's device. The portal can access those files and use them to remember the user's data, such as their chosen settings (screen view, interface language, etc.), or their login data. By using the Infona portal the user accepts automatic saving and using this information for portal operation purposes. More information on the subject can be found in the Privacy Policy and Terms of Service. By closing this window the user confirms that they have read the information on cookie usage, and they accept the privacy policy and the way cookies are used by the portal. You can change the cookie settings in your browser.
Worldwide the use of nonlineardevices have increased sharply in recent times. As a result, harmonic pollution has become a vital problem. Harmonic in the power system network interfere with the system equipments, disturbing their normal operation which can deteriorate the quality of the delivered power. In this context, this paper presents an efficient and fast method for estimation of harmonics and...
Since adaptive controller does not rely fully on dynamic system models, therefore, there exist a necessity of fast adaptation to achieve improved tracking performance using high adaptive gain. However, attaining fast adaptation using high adaptive gain is a serious limitation of adaptive controllers which may raise certain serious issues. First, it causes large frequency excursions and bursting in...
The characteristics of junctionless(JL) SON(Silicon on Nothing) FinFET, JL Bulk FinFET and SOI(Silicon on Insulator) JNT(Junctionless nanowire transistor) transistors were compared. A Silicon on nothing transistor have substrate with air filled dielectric. JL SON FinFET have better on/off current ratio and short channel effect (SCE) by reducing channel thickness due to substrate channel junction....
Any signal processing architecture has a multiplier as its pillar. Its computational capabilities depend on the multiplier's performance. Also, low-power designs are the need of next generation processors. Reversible logic is one of the promising future low power technologies. High-speed multiplication can be achieved if the carry-propagation is faster. Digital compressors have less latency in carry-propagation...
This paper deals with the problem of l2–l∞ elimination of overflow oscillations in fixed-point state-space digital filters with saturation nonlinearities and external interference. By utilizing several free-weighting matrices, a new sufficient condition for asymptotic stability with l2–l∞ performance of the underlying digital filter is derived. A numerical example is given to illustrate the effectiveness...
An increase in the decentralization of power generation, it has become necessary to study the effects of distributed generation and propose a suitable modification to the protection system to increase the reliability. The paper focuses on the effect of distributed generation on the quality of power at any location concerned due to faults occurring on the power system. The waveforms of the currents...
This paper presents a new idea to solve the selective harmonic elimination (SHE) equations with non equal dc sources using Hybrid Newton Raphson Method (HNRM). This technique is a combination of genetic algorithm (GA) and Newton Raphson Method (NRM). The HNRM technique effectively eliminates the lower order harmonics from the output voltage of the converter. In this paper, it has been also shown that,...
Conventional controllers with fixed tuning fail to perform satisfactorily for processes with time varying nature. In such cases adaptive controllers are preferred as they are capable to provide suitable corrective measure according to the changes of process dynamics and undesired process upsets. In model reference adaptive control (MRAC) desired process output specifications are provided in the form...
With the deregulation of the electrical power system and competitive business environment, power system monitoring and control have been emerged as a potential research area. Operation and control of power system are based on several strategies under normal, critical and emergency states of a power system. Control actions can be initiated either at load end (load shedding) or at generator end (generation...
This paper represents the Hardware implementation of three phase three level inverter based DSTATCOM to reduce the THD. Inverter based DSTATCOM system using mc3phac IC. In this project mc3phac IC is used to generate PWM pulses with alternate phases these PWM signals are used to fire the IGBT. The system consists of mc3phac IC, IR2110 IC (IGBT drive IC), two voltage regulators (LM7805, LM7812). In...
Wind turbine system (WTS) now a day has turned out to be exceptionally useful technique to minimize the centralization of electrical power particularly in provincial territories and rural areas. In any grid connected WTS there are alternatives for receiving reactive power from main grid but if it is islanded or made off grid in that case we need to look for different choices for voltage profile improvement...
Adaptive controllers are becoming popular for industrial closed-loop control applications, especially for various chemical processes. By incorporating adaptation mechanism, controller acquires the ability to cope with varying process dynamics. Model reference adaptive system (MRAS) is one of the most popular adaptive control techniques adopted in process industries. The most important feature of MRAS...
Deviation of frequency is a major concern in case of hybrid power generating system. Load frequency control of a thermal, wind and solar based hybrid power generation system is presented in this paper. First order proportional-integral-derivative (PID) controllers are used to reduce the deviation of frequency in the proposed LFC. Bacterial Foraging Optimization (BFO) technique is used to optimize...
In this paper, a novel technique is proposed to determine optimal size and location of shunt capacitors in radial distribution system. An objective function is formulated to reduce real & reactive power loss, to improve voltage profile and to increase annual cost saving. A new constant, Power Voltage Sensitivity Constant (PVSC), has been proposed here. The value of PVSC decides the candidate bus...
Set the date range to filter the displayed results. You can set a starting date, ending date or both. You can enter the dates manually or choose them from the calendar.