نتایج جستجو برای: secondary control
تعداد نتایج: 1596876 فیلتر نتایج به سال:
ABSTRACT: The effect of protein deficiency on the immune response upon primary and secondary stimulation with 5×108 sheep red blood cells (SRBC) was studied in 4 groups of mice fed by diets containing 4 or 21 percent of protein.Primary and secondary immune response were assessed by quantification of direct and indirect plaque forming cells (PFC) in immune spleens and by titration of serum hema...
Recently, increasing of non-linear loads in the power distribution network has been increased harmonics in these networks. The harmonics problems get worse and complicated by installation of power factor correction capacitors and filters. But the Distributed Generations (DGs) interface inverters with properly control can help to improve power quality, harmonic compensation and voltage unbalance...
This study proposes a secondary voltage and frequency control scheme based on the distributed cooperative control of multi-agent systems. The proposed secondary control is implemented through a communication network with one-way communication links. The required communication network is modelled by a directed graph (digraph). The proposed secondary control is fully distributed such that each di...
To achieve accurate reactive power and harmonic currents sharing among inverter interfaced distributed generation (DG) units in islanded microgrids, a hierarchal control scheme consisting of primary and secondary levels based on instantaneous circulating currents is proposed in this paper. Firstly, fundamental and main harmonic components of each inverter output current are extracted at the pri...
fuzzy logic has been developed over the past three decades into a widely applied techinque in classification and control engineering. today fuzzy logic control is one of the most important applications of fuzzy set theory and specially fuzzy logic. there are two general approachs for using of fuzzy control, software and hardware. integrated circuits as a solution for hardware realization are us...
this study aimed to investigate the effects of listening strategy training on iranian efl learners listening comprehension and use of such strategies. this work, employing an experimental methodology, was conducted among 60 adult efl learners from a language institute in isfahan, iran, as participants. the participants, who were selected based on the results of a placement test, were assigned t...
objective: the appropriate choice of a contraceptive method has been a major issue in reproductive health research. cu t intrauterine device (cu t iud) has been introduced as one of the most effective contraceptive methods in the world, however, the relationship between prior use of cu t iud and secondary infertility has not been evaluated in iran. to examine the association of cu t-380a iud an...
A microgrid formed by a cluster of parallel distributed generation (DG) units is capable operating in either islanded mode or grid-connected mode. Traditionally, using model predictive control algorithms, these two operation modes can be achieved with separate and different cost functions, which brings complexity hence, compromises system reliability. In this article, unified voltage current st...
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