<p>This paper focuses on the modeling and control of a wind energy conversion chain using permanent magnet synchronous machine. This system behaves turbine, generator, DC/DC DC/AC power converters. These are connected both sides to DC bus, where inverter is followed by filter which grid. In this paper, we have been used two types controllers. For stator side converter, consider Takagi-Sug...

This paper presents a dynamically adaptive quadtree grid generation system for the solution of a two-dimensional two-layer shallow water model. Roe-type two-layer shallow water solvers require numerical approximation of the system eigenvalues as well as numerical balancing, which increase computational cost considerably when a regular grid is used. In order to improve computational efficiency, ...

In this paper, we consider what condition is sufficient for random inputs to secure probabilistic public-key encryption schemes. Although a framework given in [16] enables us to discuss uniformly and comprehensively security notions of public-key encryption schemes even for the case where cryptographically weak pseudorandom generator is used as random nonce generator to encrypt single plaintext...

Let p be a prime and let a and b be elements of the finite field Fp of p elements. The inversive congruential generator (ICG) is a sequence (un) of pseudorandom numbers defined by the relation un+1 ≡ au−1 n +b mod p. We show that if sufficiently many of the most significant bits of several consecutive values un of the ICG are given, one can recover the initial value u0 (even in the case where t...

Permanent-magnet synchronous generator (PMSG) are used widely in wind turbine applications. The performance analysis of PMSG can be enhanced by adopting a number control mechanisms with the benefit advanced optimization techniques. Renewable energy is harnessed from continuously replenishing natural processes. Some commonly known sunlight, water, wind, tides, geothermal heat and various forms b...

Recently, controlling a wind energy conversion system (WECS) under fluctuating speed and enhancing the quality of power delivered to grid has been demanding challenge for many researchers. This paper provides comprehensive review synchronous generator-based WECSs. will investigate growth in Egypt throughout world, as well technological financial significance energy. The block diagram typical gr...