document

Comprehensive Study on Transformer Fault Detection via Frequency Response Analysis

Kakolaki, Seyed Ebrahim Hosseini (author), Hakimian, Vahid (author), Sadeh, Javad (author), Rakhshani, E. (author)

The sudden outage of a transformer due to a fault can cause irreparable damage to the electricity industry. Hence, by conducting momentarily inspections of the transformer's condition, faults can be promptly detected, and the transformer can be disconnected from the power grid to prevent subsequent failures in this equipment. Detecting faults...

journal article 2023

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Review on islanding detection methods for grid-connected photovoltaic systems, existing limitations and future insights

Bakhshi-Jafarabadi, Reza (author), Sadeh, Javad (author), Serrano-Fontova, Alexandre (author), Rakhshani, E. (author)

The connection of renewable energy sources (RESs) to the distribution network has been rising at a steady pace over the past decades. The great penetration of RESs such as grid-connected photovoltaic system brings new technical challenges to the distribution networks such as unintentional islanding. Conceptually, this situation occurs when a...

review 2022

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A review on techno-economic assessment of solar water heating systems in the middle east

Dehghan, Mehran Dehghan (author), Pfeiffer, Carlos F. (author), Rakhshani, E. (author), Bakhshi-Jafarabadi, Reza (author)

Currently, the economy of Middle Eastern countries relies heavily on fossil fuel sources. The direct and indirect adverse consequences of fossil fuel utilization for power generation enforce the region’s countries to raise the share of renewable energy. In this context, various incentive policies have been developed to encourage the...

review 2021

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Modeling and Optimal Tuning of Hybrid ESS Supporting Fast Active Power Regulation of Fully Decoupled Wind Power Generators

Zhang, Chenrui (author), Rakhshani, E. (author), Veerakumar, Nidarshan (author), Rueda, José L. (author), Palensky, P. (author)

The frequency stability of the power system is challenged by the high penetration of power electronic interfaced renewable energy sources (RES). This paper investigates the improvements of the frequency response of fully decoupled wind power generators (FDWG) by proposing a novel generic model implementation of ultracapacitors (UC) within a...

journal article 2021

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High power quality maximum power point tracking-based islanding detection method for grid-connected photovoltaic systems

Bakhshi-Jafarabadi, Reza (author), Sadeh, Javad (author), Rakhshani, E. (author), Popov, M. (author)

Islanding is a condition when distributed generators (DGs) are disconnected electrically from the upstream network. This unwanted situation should be detected effectively to ensure the safety of the maintenance staffs and power quality (PQ) requirements. This paper presents a new high PQ maximum power point tracking (MPPT)-based methodology for...

journal article 2021

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Comparative study of SBOAs on the tuning procedure of the designed SMPI controller for MIMO VSP/HVDC interconnected model

Rakhshani, E. (author), Naveh, Iman Mohammad Hosseini (author), Mehrjerdi, Hasan (author)

This paper presents a new application of advanced SMPI controller for a newly introduced interconnected dynamic system with VSP based HVDC links for frequency control problem. This work presents an outgrowth of analysis about the Swarm – Based Optimization Algorithms (SBOAs) in the tuning process of Multivariable Proportional – Integral (MPI)...

journal article 2021

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Dynamic Frequency Support for Low Inertia Power Systems by Renewable Energy Hubs with Fast Active Power Regulation

Rueda, José L. (author), Veerakumar, Nidarshan (author), Rakhshani, E. (author), Ahmad, Z. (author), Ebrahim Adabi, M. (author), Palensky, P. (author), van der Meijden, M.A.M.M. (author)

This paper concerns the feasibility of Fast Active Power Regulation (FAPR) in renewable energy hubs. Selected state-of-the-art FAPR strategies are applied to various controllable devices within a hub, such as a solar photovoltaic (PV) farm and an electrolyzer acting as a responsive load. Among the selected strategies are droop-based FAPR, droop...

journal article 2021

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An optimized LQG servo controller design using LQI tracker for VSP-based AC/DC interconnected systems

Rakhshani, E. (author), Naveh, Iman Mohammad Hosseini (author), Mehrjerdi, Hasan (author), Pan, K. (author)

This paper proposes a novel application for the optimal Linear Quadratic Gaussian (LQG) servo controller to enable a proper coordination of the AC/HVDC interconnected system with Virtual Synchronous Power (VSP) based inertia emulation. Particularly, the proposed control design takes the process disturbances and measurement noise of the...

journal article 2021

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Power Hardware-in-the-Loop-Based Performance Analysis of Different Converter Controllers for Fast Active Power Regulation in Low-Inertia Power Systems

Rueda, José L. (author), Ahmad, Z. (author), Veerakumar, Nidarshan (author), Rakhshani, E. (author), Ebrahim Adabi, M. (author), Palensky, P. (author), van der Meijden, M.A.M.M. (author)

Future electrical power systems will be dominated by power electronic converters, which are deployed for the integration of renewable power plants, responsive demand, and different types of storage systems. The stability of such systems will strongly depend on the control strategies attached to the converters. In this context, laboratory-scale...

journal article 2021

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A Quasi-Oppositional Method for Output Tracking Control by Swarm-Based MPID Controller on AC/HVDC Interconnected Systems with Virtual Inertia Emulation

Naveh, Iman M. Hosseini (author), Rakhshani, E. (author), Mehrjerdi, Hasan (author), Elsaharty, Mohamed A. (author)

This paper presents a comprehensive evaluation of the effect of quasi oppositional - based learning method utilization in output tracking control through a swarm-based multivariable Proportional-Integral-Derivative (SMPID) controller, which is tuned by a novel performance index based on the step response characteristics in multi-input multi...

journal article 2021

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Electromechanical design of synchronous power controller in grid integration of renewable power converters to support dynamic stability

Abdollahi, Mostafa (author), Candela, Jose Ignacio (author), Tarraso, Andres (author), Atef Elsaharty, Mohamed (author), Rakhshani, E. (author)

Nowadays, modern power converters installed in renewable power plants can provide flexible electromechanical characteristics that rely on the developed control technologies such as Synchronous Power Controller (SPC). Since high renewable penetrated power grids result in a low-inertia system, this electromechanical characteristic provides...

journal article 2021

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Real-time simulation Model of Ultracapacitors for Frequency Stability Support from Wind Generation

Zhang, C. (author), Rakhshani, E. (author), Veerakumar, Nidarshan (author), Rueda, José L. (author), Palensky, P. (author), Gonzalez-Longatt, F. (author)

The frequency stability of the power system is challenged by the high penetration of power electronic interfaced renewable energy sources (RES). Energy storage systems (ESS) are used to supply extra power injection to enhance the frequency stability during a disturbance. This paper presents a novel approach for improving the frequency dynamics...

conference paper 2021

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A Power Hardware-in-the-Loop Based Method for FAPR Compliance Testing of the Wind Turbine Converters Control

Ahmad, Z. (author), Rueda, José L. (author), Veerakumar, Nidarshan (author), Rakhshani, E. (author), Palensky, P. (author), van der Meijden, M.A.M.M. (author)

A task for new power generation technologies, interfaced to the electrical grid by power electronic converters, is to stiffen the rate of change of frequency (RoCoF) at the initial few milliseconds (ms) after any variation of active power balance. This task is defined in this article as fast active power regulation (FAPR), a generic definition...

review 2020

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MVMO-Based Identification of Key Input Variables and Design of Decision Trees for Transient Stability Assessment in Power Systems With High Penetration Levels of Wind Power

Wang, D. (author), Rueda, José L. (author), Rakhshani, E. (author), van der Meijden, M.A.M.M. (author)

Unlike synchronous generators, wind turbines cannot directly respond to large disturbances, which may cause transient instability, due to their power electronic-based interface and maximum power control strategy. To effectively monitor the influence of wind turbines, this paper proposes an approach that combines decision trees (DTs), and a...

journal article 2020

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Analysis and tuning methodology of FAPI controllers for maximising the share of grid-connected wind generations

Rakhshani, E. (author), Perilla Guerra, A.D. (author), Veerakumar, Nidarshan (author), Ahmad, Z. (author), Rueda, José L. (author), van der Meijden, M.A.M.M. (author), Palensky, P. (author)

In this study, a novel methodology is proposed for sensitivity-based tuning and analysis of derivative-based fast active power injection (FAPI) controllers in type-4 wind turbine units integrated into a low-inertia power system. The FAPI controller is attached to a power electronic interfaced generation (PEIG) represented by a generic model of...

journal article 2020

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Design of Multivariable PI Controller Using Evolutionary Algorithms for VSP based AC/DC Interconnected Systems

Naveh, Iman Mohammad Hosseini (author), Rakhshani, E. (author), Mehrjerdi, Hasan (author), Rueda, José L. (author), Palensky, P. (author)

A new application of Multivariable Proportional-Integral (MPI) controller with using evolutionary algorithms for a VSP based AC/DC interconnected power system model is proposed. The VSP based HVDC model is added for mitigation of system frequency dynamics by emulating virtual inertia. The designed heuristic-based multivariable PI controller is...

conference paper 2020

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Power-angle modulation controller to support transient stability of power systems dominated by power electronic interfacedwind generation

Perilla Guerra, A.D. (author), Rueda, José L. (author), Papadakis, Stelios (author), Rakhshani, E. (author), van der Meijden, M.A.M.M. (author), Gonzalez-Longatt, Francisco (author)

During the last few years, electric power systems have undergone a widespread shift from conventional fossil-based generation toward renewable energy-based generation. Variable speed wind generators utilizing full-scale power electronics converters are becoming the preferred technology among other types of renewable-based generation, due to...

journal article 2020

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Optimal Linear Quadratic Regulator Design of Interconnected Systems with VSP based HVDC Links for Inertia Emulation

Rakhshani, E. (author), Naveh, Iman Mohammad Hosseini (author), Mehrjerdi, Hasan (author), Rueda, José L. (author), Palensky, P. (author)

This paper proposes a new application for an optimal linear regulator for mitigation of frequency performance of an interconnected AC/DC system with (Virtual Synchronous Power) VSP based HVDC capabilities. The action of VSP, which is added into the HVDC control system, is to provide virtual inertia for the low-inertia system during a...

conference paper 2020

document

FAPI Controller for Frequency Support in Low-Inertia Power Systems

Rakhshani, E. (author), Perilla Guerra, A.D. (author), Rueda, José L. (author), Gonzalez-Longatt, Francisco M. (author), Soeiro, Thiago B. (author), van der Meijden, M.A.M.M. (author)

This paper presents different forms of Fast Active Power Injection (FAPI) control schemes for the analysis and development of different mitigation measures to address the frequency stability problem due to the growth of the penetration level of the Power Electronic Interfaced Generation (PEIG) in sustainable interconnected energy systems. Among...

journal article 2020

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Assessment of critical parameters for artificial neural networks based short-term wind generation forecasting

Sewdien, V.N. (author), Preece, R. (author), Rueda, José L. (author), Rakhshani, E. (author), van der Meijden, M.A.M.M. (author)

Participation of wind energy in the generation portfolio of power systems is increasing, making it more challenging for system operators to adequately maintain system security. It therefore becomes increasingly crucial to accurately predict the wind generation. This work investigates how different parameters influence the performance of...

journal article 2020