The relay coordination problem is of dire importance as it critical to isolate the faulty portion in a timely way and thus ensure electrical network security reliability. Meanwhile protection optimization highly constraint complicated be addressed. To fulfill this purpose, Harris Hawk Optimization (HHO) adapted solve for Directional Over-current Relays (DOCRs) numerical relays. As inspired by intelligent collegial chasing preying behavior hawks capturing prey, shows quite an impressive...

Efficient coordination of directional overcurrent relays (DOCRs) is vital for maintaining the stability and reliability electrical power systems (EPSs). The task optimizing DOCR in complex networks modeled as an optimization problem. This study aims to enhance performance protection by minimizing cumulative operating time DOCRs. achieved effectively synchronizing primary backup while ensuring that intervals (CTIs) remain within predefined limits (0.2 0.5 s). A novel strategy,...

A novel autotransformer configuration for 24-pulse rectification is proposed that not only maintains the desired power quality but also enables a reduction in equivalent capacity, therefore lowering cost, volume, and weight of overall system. The significances are easier implementation have reduced windings per core limb contrary to established topology. topology such one four 3-phase rectifiers draws current directly from input supply instead autotransformer; hence, load on significantly...

With the evolution of More Electric Aircraft (MEA) concept, high pulse converters have gained attention researchers due to their higher power quality. Among converters, 18-pulse autotransformer rectifier unit (ATRU) offers better quality level with small size, weight and medium complexity. The conventional topologies autotransformers that require use extra elements such as Inter Phase Transformers (IPT) or Zero Sequence Blocking (ZSBT), adding complexity, size overall system, are not...

Hyperspectral image compression by PCA and JPEG2000 can provide excellent rate distortion performance while preserving essential information for a successive application, e.g., classification tasks. However, onboard applications, suffers from high computational complexity large memory requirements due to the eigen-analysis of high-dimensional covariance matrix. Therefore, computationally more efficient analysis, namely Folded Principal Component Analysis (FPCA) is adopted perform dimension...

In electrical power systems, ensuring a reliable, precise, and efficient relay strategy is crucial for safe trustworthy operation, especially in multi-loop distribution systems. Overcurrent relays (OCRs) have emerged as effective solutions these challenges. This study focuses on optimizing the coordination of OCRs to minimize overall operational time main relays, thereby reducing outages. The optimization problem addressed by adjusting multiplier setting (TMS) using War Strategy Optimization...

Switching models possess discontinuous and nonlinear behavior, rendering difficulties in simulations terms of time consumption computational complexity, leading to mathematical instability an increase its vulnerability errors. This issue can be countered by averaging detailed over the entire switching period. An attempt is made for deriving improved dynamic average three phase (six-pulse) nine (18-pulse) diode rectifiers approximating load current through first order Taylor series. Small...

In electrical power systems, directional overcurrent relay (DOCR) coordination is assumed to be an essential component of the system for protection purposes. To diminish and reduce losses, between these relays ought kept at ideal value minimalize overall operating time all primary-relay shortcoming situations. The DOCR a complex profoundly compelling nonlinear problem. objective function total minimize inordinate breakdown interference. Coordination performed using marine predator algorithm...

A distributed energy system (DES) using controlled power electronics converters delivers to loads, via conventional, as well a number of renewable, sources. However, stability concerns retard the integration into an existing DES. Therefore, due high penetration converters, overall network analysis DES is becoming increasingly difficult. Impedance-based modeling emerged effective technique it reduces source and load subsystems offers easier dynamic interactions between them. These models can...

A new trend of using fuzzy algebraic structures in various applied sciences is becoming a central focus due to the accuracy and nondecoding nature. The aim present paper develop type subsystem an ordered semigroup <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" id="M2"><mml:mi>S</mml:mi><mml:mo>.</mml:mo></mml:math> This will overcome difficulties faced ideal theory up some extent. More precisely, we introduce id="M3"><mml:mrow><mml:mfenced...

Accurate modeling and stability analysis plays a vital role in all Electrical Power Systems (EPS) specifications. Stability criteria as defined by Middlebrook, is based on impedances of the interacting systems at interface point (i.e. source output impedance load input impedance). This led to an enormous research extraction for ac dc till date. measurements are hence required validate procedures well measure interconnected power systems. paper presents three phase using ABC-DQ0...

Switching models possess discontinuous and nonlinear behavior rendering difficulties in simulations terms of time consumption, computational complexity causing mathematical instability while equally vulnerable to errors. This issue can be sorted out by averaging detailed over entire switching period. Several static as well dynamic average (full order reduced order) have been proposed which proved applicable at different scenarios. paper presents an improved model three phase (six-pulse)...

This paper discusses control strategy for the voltage regulation of a three phase pulse width modulation (PWM) AC-DC converter. A fuzzy logic controller (FLC) is employed in outer loop. Fuzzy controllers are preferred over conventional proportional integral (PI) because they based on linguistic description and do not require prior mathematical model system. The objective presented system to regulate output DC during both transient steady state period. Also line currents drawn from grid...

This work mainly focuses on designing and modeling of 18-pulse autotransformer rectifier unit. The dq rotating reference frame (Park's Transformation) is used to design the average model. Polynomial fits are required build up from essential parameters like α, k <inf xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">v</inf> xmlns:xlink="http://www.w3.org/1999/xlink">i</inf> that must be extracted switching model or actual setup. designed computationally...

This paper presents an improved average model and evaluation of 18-pulse autotransformer rectifier unit (ATRU) in differential delta configuration. Average models remove the switching behavior diode rectifiers high bandwidth transients, which not only facilitates simulation power systems by reducing computational cost but also enables impedance-based stability analysis for large complex systems. To experimentally validate proposed model, a 2-kW, ATRU has been tested results derived are...

The remarkable progress of power electronic converters (PEC) technology has led to their increased penetration in distributed energy systems (DES). Particularly, the direct current (dc) nanogrid-based DES embody a variety sources and loads, connected through central dc bus. Therefore, PECs are required be employed as an interface. It would facilitate incorporation renewable battery storage system into nanogrids. However, it is more challenging integration multiple modules may cause...