A new comprehensive criterion for the coordinated automatic voltage regulator–power system stabiliser (AVR–PSS) design in large-scale power systems is proposed. Then, a control strategy introduced to make trade-off between regulation and small signal stability. The proposed combines switching technique negative feedback achieve robust controller against load/generation disturbances. An adaptive angle-based employed instead of fixed time-based hence methodology takes into account size status...

Since the initial objective of power system stabiliser (PSS) units and flexible AC transmission (FACTS) devices is damping inter‐area local oscillations, it very substantial that network electromechanical oscillatory modes are identified for tuning controller large‐scale interconnected systems. In this research, a method based on combination continuous wavelet transform Prony algorithm presented to study low‐frequency oscillations system. The coordinated design PSS FACTS parameters become...

This paper presents a new droop control strategy based on neuro-fuzzy technique to minimize voltage and frequency deviations in islanded microgrids (MGs) under severe changes load. In MGs, due lack of the backup power, imbalance between consumption generation usually leads violent voltage/frequency fluctuations. Therefore, designing reliable structure prevent MG instability is needed. The proposed designed maintain system stability fluctuations regardless structure. most important advantage...

Operation and control of large-scale power systems is a complex task. Since the primary purpose system stabilizer (PSS) units damping local interarea modes, identification network electromechanical oscillatory modes for designing PSS very important. In this research, continuous wavelet transform (CWT) was used to study low-frequency oscillations systems. The Morlet mother guidelines selection center frequency, bandwidth parameters, scaling factor were estimate reliable modal specifications...

Abstract Advent of distributed generation and progression towards an intelligent grid infrastructure within the domain contemporary electrical power systems have created dynamic load profiles. Accompanying these developments, protective relays are faced with evolving landscape variable fault current conditions, resulting in disparate operational timings throughout diurnal cycle. In light challenges, this paper delineates formulation simulation a novel adaptive protection strategy for...

The occurrence of low-frequency electromechanical oscillations is a major problem in the effective operation power systems. scrutiny these provides substantial information about system stability and security. In this paper, new method introduced based on combination synchrosqueezed wavelet transform stochastic subspace identification (SSI) algorithm to investigate large-scale Then, estimated modes are used for design stabilizer flexible alternating current transmission (FACTS) device....

Geomagnetically induced currents (GICs) in the power system cause half-cycle saturation of transformers, malfunction protective relays, reactive loss, and voltage instability. A DC Flux Blocker (DFB) that can be installed series with transformers tertiary windings to neutralize magnetomotive force (mmf) due GIC is described. The device consists two circuit breakers a low high current source, which provides mmf flux blocking function. effectiveness proposed electrical investigated validated...

Geomagnetically induced currents (GICs) in long high‐voltage transmission lines cause half‐cycle saturation of transformers, malfunction protective relays, reactive power loss, and voltage instability. This study describes the design for a GIC effects mitigation device (GEMD) that can be installed at system autotransformer common node connection to block flow DC flux cores autotransformers. The devices consist variable resistors, which are controlled by wide‐area method based on particle...

This article is introduced a new combination method of CWT and Prony algorithm to scrutiny power system low frequency electromechanical oscillations. Estimation inter-area local modes for large scale systems control important the elementary purpose controller damping these modes. The PSS FACTS parameters design has become multi-objective problem. It solved by NSGA II algorithm. Residual exerted increase meet their constraints practical limits. simulated on 2-area, 4-Generator system....

With the increasing penetration of Renewable Energy Sources, power system dynamic behavior depends on weather and climate changes, which causes uncertainty stochasticity reduces system's total inertia, consequently deteriorating stability. Thus, a fast accurate technique for real-time estimation inertia is required. It allows operator to monitor immediately make an appropriate decision. This paper proposes online method based swing equation multi-area interconnected using Phasor Measurement...

Today, the presence of renewable energy sources (RES) in power system has increased, and this created challenges for inertia system. System is due to rotor rotation large synchronous generators. At initial moments after occurrence a disturbance system, reacts causing further outages prevents rapid reduction frequency, thereby improving stability. If operators are aware value inertia, they can obtain dynamic performance against disturbance. Therefore, it possible estimate system's ability...

The power system low-frequency electromechanical oscillations examine in this paper using a maiden method that is combination of the Prony algorithm and Synchrosqueezed short-time Fourier Transform. primary purpose large scale systems control improving modes damping, therefore, estimation these are necessary two types local inter-area. formulation controller design assumed as multiobjective optimization problem intended parameters gained here by Residual Particle Swarm Optimization (PSO)...

Nowadays, according to the high penetration of renewable energy sources, importance inertia estimation has become more critical than ever. Renewables cause uncertainty and stochasticity reduce total power system. Therefore, transmission system operators in a changing environment are going face transient instability increasingly. Thus, fast accurate technique for real-time is required. It allows operator monitor immediately make an appropriate decision. This paper proposes method based on...

This paper proposes a novel three-stage near real-time phase-driven procedure to locate the generator-type source of forced oscillations, inspired by concept Transient Energy Function (TEF), independent amplitude any signal. In commencement process, each generation bus is assigned with its active power and angular velocity angles reached from reduced system graph. Next, difference in synchronous generators’ their exploited as graph branches’ weight coefficients. Then, three...

In this paper, A measurement-based model is proposed to assess the vulnerability of transmission line under overloaded cascading blackout analysis in power system online operation environment. The Measurement-based constructed by Artificial Neural Network due its ability nonlinear mapping between input and output vectors that causes a suitable prediction. Training data set provided using analytical assessment different operational condition rank obtain status each line. Then, Arterial links...