S. Mohammad Shahrtash
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View article: Failure probability and location identification of damaged insulators using normal function and monitored leakage current
Failure probability and location identification of damaged insulators using normal function and monitored leakage current Open
The main task of insulators is to isolate the conductor from the tower. These insulators must be able to isolate the high voltages of the transmission lines from the tower without having a leakage current (LC). These insulators get damaged…
View article: Experimental Evaluation and Finite Element Modelling of the Effect of Aging on Dry-band Discharge Intensity in Polluted Polymer Insulators
Experimental Evaluation and Finite Element Modelling of the Effect of Aging on Dry-band Discharge Intensity in Polluted Polymer Insulators Open
View article: A real-time analytical steady-state calculation in power system restoration: Managing uncertainty
A real-time analytical steady-state calculation in power system restoration: Managing uncertainty Open
View article: Dual-Stage Deep Learning for Long-Term Voltage Instability Prediction and Conditional OLTC Blocking–Load Shedding Decision Support
Dual-Stage Deep Learning for Long-Term Voltage Instability Prediction and Conditional OLTC Blocking–Load Shedding Decision Support Open
While On-Load Tap Changers (OLTCs) effectively regulate voltage under normal conditions, their operation during voltage instability events can inadvertently accelerate system failure. Although various OLTC blocking strategies have been pro…
View article: A Novel Data Driven Model for Voltage Stability Status Prediction and Instability Mitigation
A Novel Data Driven Model for Voltage Stability Status Prediction and Instability Mitigation Open
An intelligent power system is either a system that is smartly designed from zero to 100, or a system that was not smartly designed but currently uses all its facilities to be smartly operated in different sectors. This paper presents a no…
View article: Early Detection of Voltage Instability: A Transparent, Rule-Based Method for Cyber-Resilient Grids
Early Detection of Voltage Instability: A Transparent, Rule-Based Method for Cyber-Resilient Grids Open
This paper proposes a rule-based algorithm for fast prediction of long-term voltage stability status immediately after a disturbance, eliminating the need for post-disturbance measurements. Unlike traditional Phasor Measurement Unit (PMU) …
View article: Failure type and failure level detection of insulators according to monitored leakage current
Failure type and failure level detection of insulators according to monitored leakage current Open
View article: Comprehensive condition assessment of circuit breakers in a power network for maintenance scheduling
Comprehensive condition assessment of circuit breakers in a power network for maintenance scheduling Open
Enhancing preventive maintenance (PM) by using condition monitoring of circuit breaker (CB) can reduce maintenance costs, if enough information about the condition of this expensive equipment are provided. Here, using recorded coil current…
View article: Survey of Power System Restoration Documents Issued from 2016 to 2021
Survey of Power System Restoration Documents Issued from 2016 to 2021 Open
More than thirty-six partial or whole blackouts, from 2016 to 2021, prove that neither the probability of blackouts can be ignored nor the required plans and the readiness of the utilities for power system restoration can be forgotten. To …
View article: Prioritizing CBs Maintenance and Identifying Mandatory Maintenance at Higher Priorities
Prioritizing CBs Maintenance and Identifying Mandatory Maintenance at Higher Priorities Open
Preventive maintenance (PM) based on condition monitoring of circuit breakers (CBs) provides proper and timely maintenance of CBs and reduces their failure rate as well as network costs. Condition monitoring of CB considers functional age …
View article: Online localization and phase selection of multiple partial discharge sources in cross‐bonded cable networks
Online localization and phase selection of multiple partial discharge sources in cross‐bonded cable networks Open
This paper presents a novel rule‐based method for online localization and phase selection of multiple partial discharge (PD) sources in cross‐bonded cable (CBC) networks by simultaneous measurements of PD pulse trains at all link boxes. Th…
View article: Analytical investigations on discrimination of partial discharge defective cable termination among healthy ones with joint sheath‐ground connection
Analytical investigations on discrimination of partial discharge defective cable termination among healthy ones with joint sheath‐ground connection Open
Industrial complexes suffer from crosstalk of Partial Discharge (PD) defects in cable terminations connected to the same medium voltage busbars. This phenomenon happens because the sheath‐ground connections of all cables of one switchboard…
View article: Circuit modelling of aged‐polluted polymer insulators based on measured leakage current characteristics
Circuit modelling of aged‐polluted polymer insulators based on measured leakage current characteristics Open
A new equivalent circuit model for aged‐polluted polymer outdoor insulators is proposed here. The structure of the model is constructed as such that it can be applied in investigating the effect of insulator aging and dry band discharge in…
View article: A novel protection and fault location combined algorithm for mixed/hybrid lines
A novel protection and fault location combined algorithm for mixed/hybrid lines Open
This paper presents a novel protection and fault location combined algorithm for mixed overhead transmission lines (OHLs) and underground cables (UGCs). The method is based on applying the Morphological Gradient (MG) to the modal component…
View article: An agent‐based fast concurrent prediction scheme for transient and short‐term voltage instability
An agent‐based fast concurrent prediction scheme for transient and short‐term voltage instability Open
A novel agent‐based online prediction method is presented in this paper, to predict the status of both transient and short‐term voltage (STV) stability, against fault occurrence. In the proposed method, the trajectories of the relative fre…
View article: Permanent Committee
Permanent Committee Open
View article: A novel method for detecting pole discordance of transmission line circuit breaker
A novel method for detecting pole discordance of transmission line circuit breaker Open
View article: Synchronous Switching of Uncompensated Transmission Line, by Considering the Effect of Coupling Voltage between the Phases
Synchronous Switching of Uncompensated Transmission Line, by Considering the Effect of Coupling Voltage between the Phases Open
Synchronous Switching of Uncompensated Transmission Line, by Considering the Effect of Coupling Voltage between the Phases
View article: Agent‐based situational awareness system for severity in closeness of voltage instability occurrence
Agent‐based situational awareness system for severity in closeness of voltage instability occurrence Open
In this study, on the basis of a new agent‐based situational awareness platform, the amount of severity in closeness to voltage instability occurrence is determined. In the proposed platform (with the aid of the agents of the disturbance d…
View article: Fast transient‐based detection of busbar faults employing improved morphological gradient
Fast transient‐based detection of busbar faults employing improved morphological gradient Open
In this study, a new method for ultra‐fast speed busbar protection is presented. The method is based on processing the incoming/outgoing current signals of lines or transformers connected to a substation busbar by the improved morphologica…
View article: Adaptive boundary determination for network reduction in long‐term voltage stability analyses
Adaptive boundary determination for network reduction in long‐term voltage stability analyses Open
In this study, a simple, fast, and adaptive network reduction procedure is presented for long‐term voltage stability analyses, to speed up the simulation time. The proposed procedure consists of two parts including disturbance detection ba…
View article: Decision tree‐based method for optimum decomposition level determination in wavelet transform for noise reduction of partial discharge signals
Decision tree‐based method for optimum decomposition level determination in wavelet transform for noise reduction of partial discharge signals Open
Partial discharge (PD) monitoring in high‐voltage equipment is one of the effective methods for assessment of its insulation strength. To do this, noise reduction is one of the essential processes on measured PD signals. One of the most po…
View article: Modelling of aged cavities for partial discharge in power cable insulation
Modelling of aged cavities for partial discharge in power cable insulation Open
In this study, the ageing process of cavities in solid insulation of power cables is divided into three stages, and for each stage a circuit model is proposed. Each of these circuit models preserves the basic characteristics of the cavity …