انجام پروژه متلب | متلبی

کد مقاله g125

عنوان اصلی مقاله :

 Sensorless DTC-SVM for Induction Motor Driven by a Matrix Converter Using a Parameter Estimation Strategy

 DTC - SVM بدون سنسور براي موتور القايي با يك مبدل ماتريسي با استفاده از استراتژي تخمين پارامتر

اين مقاله يك روش تنظيم شده بردار فضايي كنترل شده گشتاور مستقيم براي بهبود عملكرد بدون سنسور مبدل ماتريسي را ارائه مي دهد كه اين مبدل با استفاده از طرح تخمين پارامتر به حركت در مي آيد . 

در واقع يك روش جديد بدون سنسور براي تخمين سرعت روتور، شار، مقاومت استاتور و مقاومت روتور ارائه داده خواهد شد

سال ارائه:  2008       نوع مقاله:IEEE        گزارش فارسی: دارد 

کلید واژه: تبديل توان AC- AC ، تحريك های موتور AC ، مشاهده گرها.

AC–AC power conversion, AC motor drives, observers.

Abstract—This paper presents a new direct torque controlled
space vector modulated method to improve the sensorless perfor
mance of matrix converter drives using a parameter estimation
scheme. The flux and torque error are geometrically combined in
a new flux leakage vector to make a stator command voltage vector
in a deadbeat manner. A new sensorless method of estimating the
rotor speed, flux, stator resistance, and rotor resistance is derived
and verified with experimental results. Common terms in the error
dynamics are utilized to find a simpler error model involving some
auxiliary variables. Using this error model, the state estimation
problem is converted into a parameter estimation problem assum
ing the rotor speed is constant. The proposed adaptive schemes
are determined so that the whole system is stable in the sense of
Lyapunov. The effectiveness of the proposed algorithm is verified
by experiments.
Index Terms—AC–AC power conversion, AC motor drives,
observers.

Abstract—This paper presents a new direct torque controlled
space vector modulated method to improve the sensorless perfor
mance of matrix converter drives using a parameter estimation
scheme. The flux and torque error are geometrically combined in
a new flux leakage vector to make a stator command voltage vector
in a deadbeat manner. A new sensorless method of estimating the
rotor speed, flux, stator resistance, and rotor resistance is derived
and verified with experimental results. Common terms in the error
dynamics are utilized to find a simpler error model involving some
auxiliary variables. Using this error model, the state estimation
problem is converted into a parameter estimation problem assum
ing the rotor speed is constant. The proposed adaptive schemes
are determined so that the whole system is stable in the sense of
Lyapunov. The effectiveness of the proposed algorithm is verified
by experiments.
Index Terms—AC–AC power conversion, AC motor drives,
observers.

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کد مقاله g170

عنوان مقاله:

Control of a wind energy conversion system equipped by a DFIG for active power generation and power quality improvement

سال ارائه:  2013       نوع مقاله: ژورنال                                     گزارش فارسی: دارد

کلید واژه : موج های جریان و ولتاژ شبکه و ولتاژ خازن، جبرانسازی, پروژه متلب , شبیه سازی با متلب ,

Variable speed wind turbine, AC-DC-AC PWM converter, Harmonic currents, Active filtering, Reactive power compensation, Power quality

abstract
The aim of this paper is to improve the reactive power compensation and activefiltering capability of
a Wind Energy Conversion System (WECS). The proposed algorithm is applied to a Doubly Fed Induction
Generator (DFIG) with a stator directly connected to the grid and a rotor connected to the grid through
a back-to-back AC-DC-AC PWM converter. The control strategy of the Rotor Side Converter (RSC) aims, at
first, to extract a maximum of power underfluctuating wind speed. Then, depending on the rate power
of the RSC, the power quality can be improved by compensating the reactive power and the grid
harmonics current due to nonlinear loads. Hence, the RSC is controlled in order to manage the WECS
function’s priorities, between production of the maximum active power captured from the wind, and
power quality improvement. The main goal of the proposed control strategy is to operate the RSC at its
full capacity, without any over-rating, in terms of reactive power compensation and active filtering
capability. Elsewhere, the Grid Side Converter (GSC) is controlled in such a way to guarantee a smooth DC
voltage and ensure sinusoidal current in the grid side. Simulation results show that the wind turbine can
operate at its optimum power point for a wide range of wind speed and power quality can be improved.
It has been shown also that the proposed strategy allows an operating full capacity of the RSC in terms of
reactive power compensation and activefiltering.

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