Mairaj-Ud Din Mufti

• PhD
• Professor at National Institute of Technology Srinagar

Even though fuzzy logic has been tremendously utilized in power systems, it has often been termed as far from complete due to the in‐existence of a systematic procedure. Here, we report a systematic development and application of a fuzzy logic equipped generic energy storage system (GESS) for dynamic stability reinforcement in a conglomerate power...

Energy storage devices (ESD's) find considerable attention for power utility applications and stability augmentation, especially with fluctuating renewable power portions. It becomes imperative to consider a generalized detailed modeling of these devices, which imbibe/capture the dynamics of the storage side as well as the grid side converters, in...

In order to mitigate most power quality issues in renewable power penetrated systems, load frequency control in automatic generation control based power systems and transient stability concerns in any power system, the deviation in frequency at the point of common coupling is chosen as the driving input for SMES active power control (Δf-control). W...

This article presents a detailed mathematical modelling and integration of a substantial 300-MW wind farm in a New England 39-bus system for stability investigations. Machine modelling is achieved using the differential algebraic equations from the two-axis model, in the form of a flexible network function. An aggregated wind farm model is develope...

In this paper, we report the modelling and dynamic performance assessment of a wind-penetrated multi-bus system incorporating a singular energy storage system (SESS)/distributed energy storage system (DESS). A superconducting magnetic energy storage (SMES) is chosen as the test bed technology through which real and reactive power (PQ) control is pe...

Power flow analysis plays a crucial role in understanding the complexities of modern power systems, encompassing generation, transmission, and distribution networks, as well as the integration of distributed energy resources and loads. This state-of-the-art review paper examines the latest power flow approaches tailored specifically for distributio...

Distributed generation (DG) has been incorporated into the distribution networks and, despite the rising prevalence of electric vehicle (EV) loads that are uncertain and cause substantial challenges in their operation, it is necessary to enhance the voltage profile, reduce power losses, and consequently improve the stability of whole networks. The...

Modern power networks are enormously complex and frequently interconnected by weak tie‐lines, which results in a variety of stability issues such as low frequency oscillations (LFOs). LFOs can have a negative impact on power system stability and tie‐line transmission capacity, resulting in catastrophic blackouts if suitable damping control mechanis...

Active power equilibrium is analogous to frequency control. A hypothesis of maintaining this balance with voltage regulation is slightly less instinctive, notwithstanding the contribution it can make to the overall stability of the power system. This idea in synergism with the utilization of superconducting magnetic energy storage (SMES) technology...

Distributed generation (DG) has been employed over the years in distribution systems to enhance system voltage profile, improve voltage regulation and minimise power losses leading to improved stability besides economic benefits. This work addresses an application of reptile search algorithm (RSA) based optimization technique to determine the optim...

Distributed generation (DG) sources that are randomly placed cause voltage fluctuations, which in turn affect power quality problems and degrade system efficiency. The placement of DG sources in a distribution network to achieve economic a, nd technical system benefits is a pressing issue that this work aims to investigate. An analysis has been con...

The concept of virtual synchronous generator (VSG), which imitates the behaviour of a real synchronous generator, is considered as a solution for lack of inertia caused due to integration of renewable sources. Unlike most of the existing VSG techniques, which are based on the idea of infinite energy, this paper takes into consideration the energy l...

Economical and technical advantages inherent in the coordinated operation of power systems resulted in large-scale grid interconnection. The major concern regarding the interconnection of the neighbouring power systems with relatively weak tie-lines is the appearance of poorly damped electromechanical oscillations. Inter-area (IA) oscillations redu...

The worldwide population explosion has narrowed the balance between energy supply and demand to alarming levels, leading to problems like the energy crisis plaguing the entire world. This has resulted in a significant increase in the evolution of renewable energy sources (RES), like solar and wind, whose stocks have increased remarkably. This paper...

In this paper, we propose an Adaptive Pitch Control (APC) technique to augment the stability of a wind turbine generator (WTG), when incident with a transient contingency. The control scheme is based on a single input, single output turbine blade pitch regulation, determined from network frequency deviations. This is implemented using MATLAB Level-...

Flywheel energy storage system (FESS) needs to be operated within its allowable speed range because it will be shut down outside this range. Furthermore, the power supplied/absorbed by FESS is constrained by the associated power electronic interface. This article proposes supervisory adaptive predictive control (APC) scheme for flywheel energy stor...

This article studies automatic generation control (AGC) problem of a realistic, multi‐source deregulated power system with thyristor controlled phase shifter (TCPS) in the tie‐line for damping the inter‐area power oscillations. In this direction, an intelligent integration of a commercially available, relatively low rating efficient energy storage...

This paper reports the modeling and dynamic performance of a wind penetrated multi-area power system incorporating a Singular Virtual Synchronous Generator (SVSG)/Distributed Virtual Synchronous Generator (DVSG). The active and reactive power controls are achieved by using Superconducting Magnetic Energy Storage (SMES) as Virtual Synchronous Genera...

A control oriented approach is adopted for the implementation of a parametric fuzzy‐predictive control on a compact model of a generalised energy storage device implanted in a multi‐machine system. It is realised using a combination of a heuristic fuzzy logic control (HFLC) and a predictive step ahead control (PSAC) for energy storage reactive and...

Isolated power system comprising of wind, diesel and energy storage presents an effective economical approach for supplying power. Advanced and intelligent control techniques are required to improve the power dispatch between storage devices and wind‐diesel system especially during disturbances. This paper focuses on development of one step ahead a...

This paper analyses the impact of superconducting magnetic energy storage (SMES) as a virtual synchronous generator (VSG) on the transient stability of the wind-penetrated power system. A modified 18-machine, 70-bus, 5-area power system is simulated in MATLAB/Simulink environment. Power command for the SMESVSG unit is generated from frequency devia...

In this article, hybrid wind-diesel system is powered with a genetically tuned fuzzy controlled flywheel for improving its frequency control. Flywheel is interfaced with the system through an electrical machine (generator/motor) and an electronic converter for synchronization. Fuzzy logic controller for the flywheel is designed in such a way that i...

This article presents a detailed, yet simple control scheme based on a flywheel energy storage system for dynamic performance enhancement. A permanent magnet machine-based 70 MW flywheel energy storage system is incorporated in a wind-integrated Western System Coordinating Council multimachine system. An elaborate mathematical modelling of the flyw...

Power quality control in a stand-alone power system is a demanding task. For satisfactory operation, such systems are being augmented with fast-acting energy storage devices. In this article, a stand-alone wind–diesel system augmented with a small-rating superconducting magnetic energy storage system is considered for both reactive and real power b...

A flywheel energy storage (F-ES) is characterized as a high-power density device with rapid full-depth discharge cycles. This makes it a viable solution as a high-power source/sink for small-time lengths. In this paper, transient stability augmentation of a power system is approached through a discrete predictively controlled (DPC) flywheel energy...

In this paper, a Battery Energy Storage System (BESS) having a rating of 1 % of total plant capacity of 75 MW is utilized with a linearized two area power system infiltrated with 20% wind. A linear DFIG model is constructed based on set point. A voltage source converter (VSC) is configured with IGBT and a two quadrant chopper is employed for bidire...

Our target is to incorporate DFIG into the two area power system. The role of the inertia present in the rotor blades of the DFIG is utilized. A two area power system is compared with a conventional power system. From the simulation studies,it is observed that there is improvement in LFC characteristics. Moreover, it is conculuded the incorporation...

The present work describes the integration of PCS (Power-conditioning system). Superconducting magnetic energy storage (SMES) for enhanced AFRC (area-frequency response characteristics) in a single area power system. We have considered 20 % penetration of wind energy into the system. Compared with other energy storage devices like Ultrabattery a mu...

In this article we focus on the implementation of genetically tuned scheme for the enhanced and improved performance characteristics of small sized PI-controller based superconducting magnetic energy storage (SMES) system in respect to Automatic generation control (AGC) applications. In contrast to the traditional control schemes this scheme propos...

In this article we concentrate on the integration of genetically tuned Supercapacitor Energy Storage System (SCESS) with a two area power system. The role of governor dead band as well as generation rate constraint in case of a practical power system is considered. Each area of power system is interconnected to the SCESS Unit. A control model of SC...

This work exhibits the use of adaptive neural control configured genetically tuned PI controller based superconducting magnetic energy storage (SMES) system for enhanced load frequency control (LFC) operation for a three area power system. The suggested scheme for the SMES control is distinct one, as it overcomes the shortcomings in the contemporar...

In this article, a comprehensive model for power quality assessment of a standalone wind-diesel-superconducting magnetic energy storage system is developed using firing angle control scheme of superconducting magnetic energy storage unit. A four-quadrant operation of superconducting magnetic energy storage unit is proposed where firing angle of sup...

In this article, a comprehensive model is developed to study the performance of a hybrid wind–diesel energy storage system. Energy storage system exchanges both real and reactive power with the wind–diesel system to improve both frequency and voltage. For obtaining pre-disturbance steady-state scenario of the system, a modified load flow algorithm...

Energy storage is becoming increasingly important for isolated power systems having overall low inertia. Among many energy storage devices, superconducting magnetic energy storage (SMES) is most suited for improved frequency control in isolated power systems, due to its outstanding advantages. However, a small rating SMES device has operational con...

This work concentrates on the integration of superconducting magnetic energy storage system with wind-penetrated two-area power systems. Each area is incorporated with a superconducting magnetic energy storage unit. The superconducting magnetic energy storage unit is controlled using an adaptive predictive control strategy, which takes care of cons...

This paper presents MATLAB/Simulink based modeling and transient stability simulation studies of a multi-machine power system, incorporated with power system stabilizers and static VAR compensator, working in a coordinated commitment to augment the system stability. A comprehensive, compact and user friendly model is developed by taking into consid...

This paper focuses on the development of Stand Alone hybrid Wind-Solar Photovoltaic system where energy storage device is used for voltage control. The system is modelled considering dynamic wind speed and solar irradiance level. Both wind and solar grids are connected at dc link where energy storage system is installed for voltage control. Wind po...

This paper focuses on the development of a supervisory control scheme for improved and profitable operation of a small-rating supercapacitor energy storage system (SCESS) in load-frequency-control applications. The proposed scheme that is based on adaptive generalized predictive control (AGPC) effectively handles the operational constraints of the...

A fuzzy-logic controlled super-capacitor bank (SCB) for improved load frequency control (LFC) of an interconnected power system is proposed, in this paper. The super-capacitor bank in each control area is interfaced with the area control bus through a power conversion system (PCS) comprising of a voltage source converter (VSC) and a buck-boost chop...

In multi-area power systems with steam reheat constraint and governor dead band nonlinearity, besides maintaining the normal frequency, the control engineer is faced with difficult problem of continuous electromechanical oscillations which the various tie-lines are subjected to whenever there is a change in customer load demand. The superconducting...

Energy storage devices are required for power quality maintenance in stand alone power systems like wind-diesel ones. A redox flow battery system has many virtues which make its integration with a wind-diesel power system attractive. This paper proposes the integration of a redox flow battery system with a typical multi-machine wind-diesel power sy...

Wind turbines often ply turbulent wind gusts and therefore spit out an irregular stream of power that is tough for the autonomous power systems to swallow. Moreover, the changes in consumer load and system configuration in such autonomous power systems represent relatively significant changes due to overall low system inertia. These characteristics...

Wind turbines often ply turbulent wind gusts and therefore spit out an irregular stream of power that is tough for the autonomous power systems to swallow. Moreover, the changes in consumer load and system configuration in such autonomous power systems represent relatively significant changes due to overall low system inertia. These characteristics...

This paper presents adaptive neural control of a superconducting magnetic energy storage system (SMES) in a power system for improved load frequency control (LFC). The proposed scheme for SMES control is a new one, tackles the deficiencies in the existing SMES control schemes and is clear about its implementation aspects. The power conversion syste...

Energy storage devices are required for power quality maintenance in stand alone power systems like wind-diesel ones. A redox flow battery system has many virtues which make its integration with a wind-diesel power system attractive. This paper proposes the integration of a redox flow battery system with a typical multi-machine wind-diesel power sy...

In wind-diesel stand-alone power systems, the disturbances like random nature of wind power, turbulent wind, sudden changes in load demand and the wind park disconnection effect continuously the system voltage and frequency. The satisfactory operation of such a system is not an easy task and the control design has to take in to account all these su...

A redox flow battery (RFB), as with superconducting magnetic energy storage, has a high speed response, and its active and reactive powers can be modulated in the four quadrants of the power chart. This type of rechargeable battery is not aged by frequent charging and discharging, and the battery efficiency increases when the charging/discharging p...

This paper deals with the control of a stand alone power system comprised of a pitch controlled wind turbine and two diesel units. First, a single-input single-output (SISO) self-tuning regulator (STR) is designed for blade-pitch control, with a conventional diesel governor control. Then, a two-input two-output (TITO) STR is used for coordinated pi...

The control of voltage and frequency in stand-alone systems incorporating wind turbines is a challenging task. Fast automated control actions are required to tackle this problem. With recent developments in power electronics and computer, superconducting magnetic energy storage (SMES) and battery energy storage systems (BESS) have emerged as fast-a...

This paper presents modelling and control aspects of an isolated wind–diesel system equipped with a superconducting magnetic energy storage (SMES) unit. The SMES unit is located at the induction generators' terminal bus, for exchanging real and reactive powers in four quadrants, with the wind–diesel system. The system components are modelled by non...

This paper presents a new scheme for smoothing out the voltage and frequency fluctuations simultaneously in a hybrid wind-diesel system using a super conducting magnetic energy storage (SMES) unit. The SMES unit located at induction generators' terminal bus, uses local measurements for exchanging real and reactive powers simultaneously in four quad...

This paper proposes some effective self-tuning control strategies for isolated wind-diesel power generation systems. Detailed modelling and studies on both single-input single-output (SISO) as well as multi-input multi-output (MIMO) self tuning regulators, applied to a typical system, are reported. Further, the effect of introducing a superconducti...