نتایج جستجو برای: parallel connection of vsis
تعداد نتایج: 21184285 فیلتر نتایج به سال:
In present day power systems, Power Quality (PQ) issues are causing great concern owing to the increased use of electronic controlled drives and fluctuating other non-linear loads. This problem is further aggravated by a steady increase in integration renewable energy-based Distribution Generation (DG), employing converters distribution systems. Custom devices with suitable control strategies p...
Parallel connection of inverter modules is a solution to increase reliability, efficiency and redundancy of inverters in Micro-Grid system. Proper load sharing among parallel inverters is a key point. The circulating current among the inverters can greatly reduce the efficiency or even cause instability of the system. In this paper, a control strategy for improving the load sharing performance ...
nowadays enhancing critical thinking in learners is considered one of the foreign language teachers’ tasks due to its high position in foreign language classrooms. when it comes to selecting materials for language classrooms, there are obviously some criteria that teachers should apply. the present study aimed at a critical thinking based analysis of ten picture story books and ten folktales th...
this thesis attempts to study the representations of the third-world intellectuals in three fictional works by the british-educated trinidadian nobel-winner v. s. naipaul: the mimic men, a bend in the river, and magic seeds. the first one recounts the story of ralph singh’s sense of alienation, his experiences as a colonial politician, and his struggle to give order to his disorderly world thro...
The design of an interface unit is described, in which RS232 serial data is converted to latched parallel data on 22 independent lines. The data direction of each line is programmable through the serial port. Two picocontrollers are employed in a parallel processing mode to give the required number of I/O pins, and data on the shared serial line is coded to separate data streams to the individu...
The integration of the weak grids along with clean energy that comes from natural resources requires stable interconnection Voltage-Source Inverters (VSIs) grids. During severe voltage sags, grid integrated VSIs may fail synchronization grid.These inverters' transient stability under disruptions is and significantly different synchronous machines. To prevent side band oscillations in grids, eme...
in chapter 1, charactrizations of fragmentability, which are obtained by namioka (37), ribarska (45) and kenderov-moors (32), are given. also the connection between fragmentability and its variants and other topics in banach spaces such as analytic space, the radone-nikodym property, differentiability of convex functions, kadec renorming are discussed. in chapter 2, we use game characterization...
In this paper, we extend Sasaki metric for tangent bundle of a Riemannian manifold and Sasaki-Mok metric for the frame bundle of a Riemannian manifold [I] to the case of a semi-Riemannian vector bundle over a semi- Riemannian manifold. In fact, if E is a semi-Riemannian vector bundle over a semi-Riemannian manifold M, then by using an arbitrary (linear) connection on E, we can make E, as a...
This paper describes an object recognition algorithm both on a sequential machine and on a SIMD parallel processor such as the MIT Connection Machine. The parallel version is shown to run three to four orders of magnitude faster than the sequential version.
The interconnection of distributed energy resources (DERs) in microgrids (MGs) operating both islanded and grid-connected modes require coordinated control strategies. DERs are interfaced with voltage source inverters (VSIs) enabling interconnection. This paper proposes a load demand sharing scheme for the parallel operation VSIs an inverter-based microgrid (VSI-MG). ride-through capability hea...
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