With the increasing exchange of information around the world and the use of telecommunication networks such as the Internet, the validity of digital documents have become very important because it may be distroyed or attacked intentionally or unintentionally. Muslims consider Quran as the most important book and so much effort has been made to protect […]
Recently, the renewable resources such as wind farms assumed more attraction due to their features of being clean, no dependency to any type of fuel and having a low marginal cost. The output power of wind units is dependent on the wind speed which has a volatile and intermittent nature. This fact confronts the solution […]
Due to the specific nature and various limitations in the architecture and resources of mobile wireless networks, AD HOC networks are highly challenging and risky in terms of quality spheres and maintaining such systems. Opportunistic routing provides the opportunity to improve these issues and enhance the network performance appropriately. Meanwhile, due to unspecified exchange routes […]
This paper presents indirect field-oriented control method for two-level inverter FED induction motor. This research paper offers a simple switching strategy to provide optimized output torque, speed regulation and also, less switching losses. In addition to enabling fast torque and speed response this study also offers constant switching frequency. Conventional Hysteresis current controller has two […]
This paper presents a study on the four-leg VSI based distribution static compensator (D-STATCOM) for compensation of neutral, source & PCC current harmonic distortion, PCC voltage regulation and compensation of unbalanced in current waveform. This solution could be used for three-phase four-wire nonlinear and unbalanced load medium voltage distribution system. The proposed control algorithm is […]
Due to increasing use of renewable energy sources, employing dc/dc converters as interface is proliferated. Among various dc/dc topologies, utilizing multi-input converters due to higher reliability and flexibility is more widespread. This paper evaluates the reliability of the multi-input dc/dc converter, besides carrying out cost calculation to achieve the cost-effective and reliable converter. Furthermore, diagrams […]
In this paper, the economic dispatch problem in combined AC-DC systems is studied based on the equivalent losses matrix of power flow. The proposed method is started by the calculation of the power flow for combined AC-DC system, then the calculation of the losses matrix. Afterwards, the economic dispatch problem is calculated by interior point […]
It is well-known that the stator Inter-Turn Short Circuit (ITSC) fault detection in vector-controlled Induction Motor (IM) is a very difficult task so far. This is due to the various problems encountered in diagnostic processes resulting from the speed variation and its influence on electrical signals. As a solution, this paper proposes an approach based […]
This paper presents a wide tuning range, and low noise voltage controlled oscillator (VCO) based on cross-coupled and colpitts structures. The advantages of this work provide a low-phase noise and robust start-up condition, leading to minimized the dc power. In addition, a new structure of capacitor bank is used in this structure to achieve a […]
This review paper contains the discussion about performance analysis of high speed 4-2 compressor architectures, starting from the general idea; conventional form for implementation of this building block along with its truth table has been studied. Thereafter, the modified versions which show promise for high speed multiplier implementations along with their benefits and drawbacks were […]
