The LVRT (Low Voltage Ride Through) is the main characteristic of every power system in faulty conditions. When fault occurs, it is essential for power system such as microgrid to control the voltage and frequency normally. Naturally in fault status, the unbalanced voltage and current are inevitable, but with the aid of LVRT technique, microgrid can keep stability in main system parameters such...

Power spectra of an extensive set of natural images were analysed. Both the total power in a spectrum (corresponding to image contrast) and its dependence on spatial frequency vary considerably between images, and also within images when considered as functions of orientation. A series of probabilistic models for power spectra enabled calculating the information obtained from prior knowledge of...

ABSTRACT: Installation of many distributed generations (DGs) could be detrimental to the power quality of utility grids. Micro grids facilitate effortless installation of DGs in conventional power systems. In recent years, DC microgrid have gained popularity because DC output sources such as photovoltaic systems, fuel cells, and batteries can be interconnected without ac/dc conversion, which co...

in this paper, a hybrid solid oxide fuel cell (sofc) and micro gas turbine (mgt) power system is parametrically studied to evaluate the effect of different operating conditions. the sofc/mgt power system includes sofc reactor, combustion chamber, compressor and turbine units, and two heat exchangers. the effects of fuel utilization, temperature, and pressure are assessed on performance of the h...

This paper offers some insights into Twitter as a political field, based on Bourdieu’s field theory. Networked publics, agents of this are competing overpower by performing networked practices. To investigate we focused two practices: framing and narrating. Persian in 2017 presidential election provides good context to analyze how such is constituted. Combining social-network analytic approach ...

Tonga’s constitution was originally a liberal, 19th century document that economically combined popular representation and aristocratic direction in a unicameral vehicle instead of the conventional bicameral legislature. Subsequent amendments strengthened the executive, and the greatest of all, in 1914, significantly reduced representation of both nobles and people. The configuration of power s...

Migrating archival description from paper-based finding aids to structured online data reconfigures the dynamics of representation and interactions. This paper considers knowledge implications transferring traditional Discover Archives, a university-wide implementation Access Memory (AtoM) at University Toronto. The migration translation varied descriptive practices conform single system that i...

This paper attempts to take Japans Taika Era Reforms and China’s Westernization Movement in the Qing Dynasty as positive negative cases explore role of “state learning” under pressure different international structures how it leads changes state formation. In case Japan’s Reforms, structure is not a balance power system, so behavior dominated by consequence logic adaptive system. are more due “...