Advanced Energy Technologies
1. An Overview of Hydroelectric Power Plant: Operation, Modeling, and Control

Ghazanfar Shahgholian

Volume 7, Issue 3 , Summer 2020, , Pages 14-28

http://dx.doi.org/10.30501/jree.2020.221567.1087

Abstract
  Renewable energy provides twenty percent of electricity generation worldwide. Hydroelectric power is the cheapest way to generate electricity today. It is a renewable source of energy and provides almost one-fifth of electricity in the world. Also, it generates electricity using a renewable natural resource ...  Read More

2. Intelligent Pitch Angle Control Based on Gain-Scheduled Recurrent ANFIS

Ehsan Hosseini; Ehsan Aghadavoodi; Ghazanfar Shahgholian; Homayoun Mahdavi-Nasab

Volume 6, Issue 1 , Winter 2019, , Pages 36-45

http://dx.doi.org/10.30501/jree.2019.95920

Abstract
  The effective utilization of wind energy conversion system )WECS( is one of the most crucial concerns for the development of renewable energy systems. In order to achieve appropriate wind power, different pitch angle methods are used. Recurrent Adaptive Neuro-Fuzzy Inference System (RANFIS) is utilized ...  Read More

Renewable Energy Resources and Technologies
3. Stability Improvement of Hydraulic Turbine Regulating System Using Round-Robin Scheduling Algorithm

Fariba Heidarpour; Ghazanfar shahgholian

Volume 5, Issue 1 , Winter 2018, , Pages 1-7

http://dx.doi.org/10.30501/jree.2018.88584

Abstract
  The sustainability of hydraulic turbines was one of the most important issues considered by electrical energy provider experts. Increased electromechanical oscillation damping is one of the key issues in the turbines sustainability. Electromechanical oscillations, if not quickly damp, can threaten the ...  Read More

4. Different Types of Pitch Angle Control Strategies Used in Wind Turbine System Applications

Ehsan Hosseini; Ghazanfar Shahgholian

Volume 4, Issue 1 , Winter 2017, , Pages 20-35

http://dx.doi.org/10.30501/jree.2017.70103

Abstract
  The most common controller in wind turbine is the blade pitch angle control in order to get the desired power. Controlling the pitch angle in wind turbines has a direct impact on the dynamic performance of the machine and fluct­uat­io­ns in the power systems. Due to constant changes in wind ...  Read More

5. Modelling and Simulation of Low-Head Hydro Turbine for Small Signal Stability Analysis in Power System

Ghazanfar Shahgholian

Volume 3, Issue 3 , Summer 2016, , Pages 11-20

http://dx.doi.org/10.30501/jree.2016.70088

Abstract
  The hydro turbine dynamics have a considerable influence on the dynamic stability of power system. In the study of dynamic stability, the system is modeled by the linear differential equations (small  signal analysis). Small signal stability of power systems is needed in all conditions and ...  Read More

6. Speed Control of Wind Turbine through Pitch Control Using Different Control Techniques

Javad Faiz; Arash Hakimi Tehrani; Ghazanfar shahgholian; Amir Masoud Takbash

Volume 3, Issue 2 , Spring 2016, , Pages 15-23

http://dx.doi.org/10.30501/jree.2016.70081

Abstract
  Pitch control is one of t he  major aspects of wind turbine control, particularly over high wi nd s p e e d  a n d  oscillations. General El e c t r i c  (GE) model of  wi n d  t ur bi ne  i s practically compatible with the structure of the wind turbines. I t  ...  Read More