Modern radiation therapy (RT) treatment planning is based on multimodality imaging. With the recent availability of whole-body PET/MR hybrid imaging new opportunities arise to improve target volume delineation in RT treatment planning. This, however, requires dedicated RT equipment for reproducible patient positioning on the PET/MR system, which has to be compatible with MR and PET imaging. A p...

This is the digital implementations of Sinusoidal Pulse Width Modulation (SPWM) generators based on analog circuits. The FPGA based SPWM generator is capable to operate at switching frequencies up to 3 MHz, thus it is capable to support the high switching frequency requirements of modern single-phase dc/ac power converters. The Existing design the switching operation is in 1 MHz. Additionally, ...

Now a days wind power energy is playing a major role in power industry. With the raise in application of the wind power variety of topologies are emerging into picture. Within the various types of adjustable speed fixed frequency topologies DFIG is most preferred type because of its efficiency as well as capability to allow wide range of speed variance at simplified converter size. Doubly Fed I...

In this paper direct power control (DPC) strategy is applied to control a doubly fed induction generator (DFIG) based wind energy generation system. A AC/DC/AC converter is controlled by direct power control method. The rotor side converter is controlled by selects appropriates voltage vector based on the instantaneous errors between the reference and estimated values of active and reactive pow...

This paper investigates the uses of battery energy storage system (BESS) in ac networks highly populated with wind power generation. The investigation includes power system load leveling, frequency stabilization, and provision of reactive power support to the wind farm network. The BESS is connected to the wind farm main hub via voltage source converter, while the wind farm is connected to ac n...

We developed an accurate, efficient and flexible modeling method for the steady-state and transient analysis of grid-connected superconducting synchronous machines. On the one hand, the machine flux linkages and electromagnetic torque as function of operational parameters are obtained from static finite element analysis and stored in lookup tables. On the other hand, the machine is represented ...

To reduce the power dissipation in conventional CMOS logic and to maintain adiabatic charging and discharging with low power for the adiabatic dynamic CMOS logic (ADCL), the clock signal of logic circuits should be synchronized with the AC power source. In this paper, the low-power clock generator synchronized with the AC power signal is proposed for ADCL system. From the simulation result, sum...

One of the concepts in restructuring the electric power industry is the ability to accurately and rapidly quantify the power transfer so-called as the available transfer capability (ATC). Accurate identification of ATC provides vital information for both planning and operation of the bulk power market in reserving transmission services. There are various methods used to determine ATC such as th...

Micro hydro power plants (µHPP) are typically used to supply electric energy microgrids outside the national grids taking care of frequency control isolated system. A conventional way maintain load balance in system is use thyristor switched AC-AC converters controlled dump loads. disadvantage their reactive consumption decreasing factor at generator output. To avoid this problem authors have e...

Sistem kerja Pembangkit listrik Tenaga Angin ini secara sederhana memanfaatkan angin sebagai penggerak turbin kemudian dikonversikan menjadi energi listrik, namun yang dihasilkan adalah berupa arus bolak balik karena menggunakan generator AC, oleh itu dibutuhkan rangkaian penyearah untuk merubah tegangan AC ke DC. Tingginya polusi seiring meningkatnya jumlah kendaraan bermotor khususnya mobil d...