in the past few decades, increasing growth of wind power plants causes different problems for the power quality in the grid. normal and transient impacts of these units on the power grid clearly indicate the need to improve the quality of the electricity generated by them in the design of such systems. improving the efficiency of the large-scale wind system is dependent on the control parameter...

background: to asses the status of two representative genes of cag pai i.e caga and cage of helicobacter pylori strains infecting iranian patients suffered from various clinical outcomes using one-step pcr. methods: a total of 120 h. pylori infected patients including non-ulcer dyspepsia, nud (n=81), peptic ulcer disease, pud (n=17), and gastric carcinoma, gc (n= 22) referred for endoscopy or g...

Recently a new and simple method to mitigate the transient instability of squirrel cage induction generators (IG) without using any additional equipment. The majority of the fixed speed wind turbines are equipped with squirrel cage IG and ac connected to the power system. During a fault in power system, voltage and rotor speed instability may occur, especially when the strength of the system co...

wind energy today, has attracted widespread interest from among a variety of sources of renewable energy in the world. owing to the increasing demand for production of electrical energy for electricity networks by using wind power, it is essential that wind power plants are actively incorporated in the network’s performance using an appropriate control system. in general, these wind power plant...

using the facts controllers, such as static synchronous compensator (statcom), as it provides continuous reactive power, in the grid including wind turbine (wt) equipped with doubly fed induction generator, for improving voltage profile (under normal circumstances) and providing a transition ability from inductor generator transition state has been proposed. in this paper, in order to control t...

Recently, there has been a rise in the integration of renewable energy sources into power grids. As result this, is need to carry out new studies order understand dynamics grids during disturbances that mainly caused by stochastic nature wind energy. The operation modern are tied farms follows stipulated grid requirement or codes, considering allowable threshold frequency variation dynamics. Th...

In this research paper, the performance of an air-cored axial flux permanent magnet synchronous generator is evaluated for low speed, direct drive applications using 3D finite element modeling and experimental tests. The structure of the considered machine consists of double rotor and coreless stator, which results in the absence of core losses, reduction of stator weight and elimination of cog...

Renewable energy will play a vital role in greenhouse gas emissions reduction. However, renewable is located far away from the load center. Modular multilevel converter-(MMC) based VSC-HVDC systems became competitive for remotely grid integration. Unlike average model MMC and side converter, this paper presents detailed model-based control analysis of MMC-HVDC system solar wind Furthermore, it ...