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Journal articles on the topic 'Power system failure'

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1

Li, Juan. "A Cascading Failure Prediction Method in Power System Based on Multi-Agent and Hybrid Genetic Algorithm." Applied Mechanics and Materials 494-495 (February 2014): 1598–601. http://dx.doi.org/10.4028/www.scientific.net/amm.494-495.1598.

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To effectively predict cascading failure in power system, a cascading failure prediction method in power system based on multi-agent and hybrid genetic algorithm is constructed. A cascading failure prediction procedure in power system was established by multi-agent and hybrid genetic algorithm to investigate the emergent behaviors of cascading failures and to further study the prediction and defense of cascading failures. Finally, the cascading failure prediction simulation system of power system based on this method was demonstrated and validated by Flexsim software. The result showed that th
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Wang, Ming, Yuanzhen Zhu, Zhaohao Jia, Yiheng Chen, and Runjia Sun. "Analysis of successive commutation failure influence on power angle stability of large power grid." Journal of Physics: Conference Series 2917, no. 1 (2024): 012014. https://doi.org/10.1088/1742-6596/2917/1/012014.

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Abstract Successive commutation failure seriously threatens the safe operation of large AC/DC power grids, which may lead to cascading failures across regional power grids. Firstly, from the perspective of reactive power exchange in AC/DC systems, the cause of successive commutation failure is analyzed. Then, taking a simplified three-zone AC/DC interconnected system as an example, the variation of the relative power angle of the synchronous generator in the AC system during the successive commutation failure process is analyzed based on the equal-area criterion. Finally, simulation analysis i
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Chen, Qiang, Yu Feng Guo, Na Pan, and Ji Lai Yu. "Probability Analysis Method of Power System Cascading Failures Caused by Extreme Hot Weather." Advanced Materials Research 860-863 (December 2013): 1996–2002. http://dx.doi.org/10.4028/www.scientific.net/amr.860-863.1996.

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In recent years, natural disasters happened frequently, which caused more and more failures of power system. To study the transmission lines failure under extreme hot weather, firstly the line's temperature changing with time is forecast based on the heat balance equation and the line's failure probability is calculated according to the historical statistics of failure rate. Then a test system to simulate the power grid under extreme hot weather is built and the curve of line's failure probability changing with time is obtained. The results provide a reference to power sector to guarantee the
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4

Hussain, Abadal Salam T., Israa A. Dahham, F. Malek, et al. "Early Warning for DC Power Failure System." Applied Mechanics and Materials 793 (September 2015): 124–28. http://dx.doi.org/10.4028/www.scientific.net/amm.793.124.

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Electrical systems and devices suffer from unexpected failures due to various reasons such as input voltage fluctuation and low or high voltages. This paper discussedabout the development of a device for detecting imminent failure of electric products such as refrigerators, ovens, Air-conditions and etc. The main objective of this developed preventive device is todetect voltage drop or rise and produce an alarmsignal to enable and activates other protection circuitry.The mechanismof the detector/sensing circuit is based on differentiating the voltage level using dualcomparator; this makes the
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Ifeanyi, Chukwuagu M., Ogbu Gregory, and Chukwu Linus. "Improving Cyber Security in Power Systems and Substation Automation Using Intelligent Based System." American Journal of Multidisciplinary Research and Innovation 4, no. 4 (2025): 47–63. https://doi.org/10.54536/ajmri.v4i4.4823.

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The constant failure in cyber security in power systems and substation automation that has crippled business activities that mostly depend on power to run their routine activities are caused by Lack of Adequate Security Measures, Human Error, Outdated Software and Hardware, Insufficient Training and Awareness, Insider Threats, Weak Access Control Mechanisms, Inadequate Network Segmentation, Failure to Patch Vulnerabilities, Complexity of the System, Third-Party Vendor Risks and Denial of Service (DoS) Vulnerabilities. This is surmounted by introducing improved cyber security in power systems a
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Cheng, Lun, Tao Wang, Yuhang Wu, Zeming Gao, and Ning Ji. "Hierarchical Blocking Control for Mitigating Cascading Failures in Power Systems with Wind Power Integration." Energies 17, no. 2 (2024): 442. http://dx.doi.org/10.3390/en17020442.

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The increasing uncertainty of wind power brings greater challenges to the control for mitigation of cascading failures. In order to minimize the risk of cascading failures in large-scale wind power systems at a lower economic cost, a multi-stage blocking control model is proposed based on sensitivity analysis. Firstly, the propagation mechanism of cascading failures in power systems with wind power integration is analyzed, and the propagation path of such failures is predicted. Subsequently, sensitive lines that are prone to failure are identified using the power sensitivity matrix, taking int
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7

Liu, Ping, Penghui Liu, Yang Yang, et al. "Risk Analysis and Mitigation Strategy of Power System Cascading Failure Under the Background of Weather Disaster." Processes 13, no. 1 (2024): 45. https://doi.org/10.3390/pr13010045.

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In mountainous regions, forested areas, and other zones prone to natural disasters, power equipment faces heightened risks of shutdown. Such disruptions significantly elevate the risk of secondary cascading failures within the power grid. Consequently, devising cascading failure mitigation strategies from an operational perspective is of paramount importance for containing the spread of cascading failures in the power system during disasters and minimizing the losses incurred from disaster incidents. Firstly, based on the severity of natural disaster accident risks, this paper establishes a ri
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8

Zhao, Ming. "Superposition of Power-Law Models for Hardware/Software System Reliability Data Analysis." International Journal of Reliability, Quality and Safety Engineering 10, no. 02 (2003): 121–30. http://dx.doi.org/10.1142/s0218539303001044.

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One of the widely used NHPP models in reliability is the so-called power-law model, also known as the Duane model. A power-law model can be applied in analyzing failure data of both software and hardware systems. Nevertheless, the power-law model is no longer applicable to describe the failure behavior when a hardware/software embedded system is concerned since the failures can come from both hardware and software. How to analyze the failure data of this type is still a problem to study and a new type of model is needed to develop. In this paper, we consider the superposition of the power-law
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9

ABDELAZIZ, A. R. "CALCULATING THE FREQUENCY OF POWER SYSTEM FAILURE INCLUDING COMMON-CAUSE FAILURES." Electric Machines & Power Systems 24, no. 5 (1996): 533–40. http://dx.doi.org/10.1080/07313569608955692.

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10

Soliman, H. M., M. F. Morsi, M. F. Hassan, and M. A. Awadallah. "Power System Reliable Stabilization with Actuator Failure." Electric Power Components and Systems 37, no. 1 (2008): 61–77. http://dx.doi.org/10.1080/15325000802322020.

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11

Chang, Hong-Chan, Shang-Chih Lin, Cheng-Chien Kuo, and Hao-Ping Yu. "Cloud Monitoring for Solar Plants with Support Vector Machine Based Fault Detection System." Mathematical Problems in Engineering 2014 (2014): 1–10. http://dx.doi.org/10.1155/2014/564517.

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This study endeavors to develop a cloud monitoring system for solar plants. This system incorporates numerous subsystems, such as a geographic information system, an instantaneous power-consumption information system, a reporting system, and a failure diagnosis system. Visual C# was integrated with ASP.NET and SQL technologies for the proposed monitoring system. A user interface for database management system was developed to enable users to access solar power information and management systems. In addition, by using peer-to-peer (P2P) streaming technology and audio/video encoding/decoding tec
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12

Smagin, Denis lgorevich, Konstantin lgorevich Starostin, Roman Sergeevich Savelyev, Anatoly Anatolyevich Satin, Alexey Andreevich Pritulkin, and Tatiana Dmitrievna Makovskaya. "MODELING OF FAILURES OF THE ELECTRICITY SYSTEM (SES) AC LONG-HAUL PASSENGER PLANE IN THE SOFTWARE PACKAGE SIMINTECH." Computational nanotechnology 6, no. 2 (2019): 63–70. http://dx.doi.org/10.33693/2313-223x-2019-6-2-63-70.

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The application of mathematical model of power supply system of perspective long-haul passenger aircraft for the analysis of failure situations is Considered. The results of modeling of failure situations (only failures of generators are considered) for the system of generation and distribution of alternating current are given, the features of mathematical modeling of the power supply system are shown.
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13

Zhang, Yong Xi, Hong Ming Yang, Zhao Yang Dong, and Ming Yong Lai. "Stochastic Optimal Dispatch of Power System under Extreme Weather Disaster." Applied Mechanics and Materials 37-38 (November 2010): 1219–22. http://dx.doi.org/10.4028/www.scientific.net/amm.37-38.1219.

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Several large scale failures of power system took place due to extreme weather disaster recent years, which aroused the consideration of power network security operation. Considering that the line failure events caused by natural disaster presented random characteristic, using Poisson distribution theory to depict the probability of line failure, a stochastic power system optimal dispatch model based on chance constraints theory was also proposed. We adopted the Differential Evolution algorithm to calculate the total loss based on Monte-Carlo simulation. The results of IEEE 9-bus case study im
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14

Ifeanyi, Chukwuagu M., Ogbu Gregory, and Chukwu Linus. "Power System Restoration Using Artificial Neural Network (ANN)." American Journal of Multidisciplinary Research and Innovation 4, no. 3 (2025): 233–43. https://doi.org/10.54536/ajmri.v4i3.4820.

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The persistent power failure in the country is caused by not restoring power fast for utilization. This leads to introduction of Power system restoration using artificial neural network (ANN). To achieve this, it is carried out in this manner, characterizing power system restoration, establishing the causes of power system failure, designing a SIMULINK model for power system restoration, Training ANN in the causes of power system failure for an effective restoration, develop an algorithm that will implement the process, designing a SIMULINK model for power system restoration using ANN and Vali
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15

Lim, Hee-Won, Il-Kwon Kim, Ji-Hyeon Kim, and U.-Cheul Shin. "Simulation-Based Fault Detection Remote Monitoring System for Small-Scale Photovoltaic Systems." Energies 15, no. 24 (2022): 9422. http://dx.doi.org/10.3390/en15249422.

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A small-scale grid-connected PV system that is easy to install and is inexpensive as a remote monitoring system may cause economic losses if its failure is not found and it is left unattended for a long time. Thus, in this study, we developed a low-cost fault detection remote monitoring system for small-scale grid-connected PV systems. This active monitoring system equipped with a simulation-based fault detection algorithm accurately predicts AC power under normal operating conditions and notifies its failure when the measured power is abnormally low. In order to lower the cost, we used a sing
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16

Yakubov, Khushnud, Shavkat Ravutov, Abdulla Khayitov, Rashid Radjabov, and Otabek Mirzayev. "Evaluation of operational reliability of diesel fuel system elements." E3S Web of Conferences 583 (2024): 03006. http://dx.doi.org/10.1051/e3sconf/202458303006.

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In the article, as a result of a review and analysis of studies on the reliability of elements of the power system of diesel engines, it was determined that the cause of most failures of elements of the power system is the presence of impurities and water in the fuel, and the use of a defective fuel filter. The purpose of the study is to assess the degree of reliability of elements of the power supply system of diesel engines under normal operating conditions. For this purpose, an observation program has been drawn up for a group of intensively working tractors. Taking into account apriori inf
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17

Kaveh, Hassan. "Design Considerations for Remote, Standalone Power Systems." Materials Performance 54, no. 4 (2015): 28–30. https://doi.org/10.5006/mp2015_54_4-28.

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Standalone power systems based on a battery bank recharged with solar energy can offer important operational flexibility in remote applications. Battery failures, however, can lead to premature system shutdown and costly emergency fixes. Failures are typically attributed to either poor maintenance or, in many cases, design errors. This article explores the latter and highlights the areas of concern that are possible sources of field failure.
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18

Ancona, J. J. "A framework for power system restoration following a major power failure." IEEE Transactions on Power Systems 10, no. 3 (1995): 1480–85. http://dx.doi.org/10.1109/59.466500.

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19

O.C.Onuigbo and Edokpia R.O. "Tripping Profile of 11kv Feeders in Benin City, Edo State, Nigeria." Tripping Profile of 11kv Feeders in Benin City, Edo State, Nigeria 8, no. 12 (2023): 5. https://doi.org/10.5281/zenodo.10409799.

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Nigeria’s power supply has been experiencing incessant interruptions due to failures in the distribution system. The maintainability of the power system is important in meeting customers demand. The maintainability of three 11kv feeder in Benin Electricity Distribution Company (BEDC), Edo State Nigeria is evaluated in this study. The failure data which includes; time of failure, time outage was restored, causes of failure, and the failure time were collated and collected from the Injection substations of the three feeders for the year 2020 and 2021. Monthly and Yearly Mean time between f
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20

Gozali, Alfian Akbar. "Power Station Engine Failure Early Warning System Using Thermal Camera." Jurnal Penelitian Pendidikan IPA 9, no. 8 (2023): 6590–96. http://dx.doi.org/10.29303/jppipa.v9i8.4598.

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Power station engines are critical infrastructure components that require constant monitoring to prevent failures and ensure an uninterrupted power supply. This paper proposes a failure early warning system based on a thermal camera using a computer vision approach. The system uses a thermal camera to generate thermal images in a video format, which is then processed by an automated fire detection engine and temperature detection engine. The results of these two subsystems are then used as input for an anomaly detection engine, which predicts the likelihood of engine failure. Based on the resu
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21

Srivastava, Ashish, and Dr M. S. Dash. "Study of Modeling of Hybrid Energy System for Optimum Power Extraction from the System to the Grid." SMART MOVES JOURNAL IJOSCIENCE 7, no. 2 (2021): 19–24. http://dx.doi.org/10.24113/ijoscience.v7i2.361.

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With the growing demand of electricity, deployment of micro grid is becoming an attractive option to meet the energy demands. At present, large-scale wind/solar hybrid system is of great potential for development. The large-scale wind/solar hybrid system is of higher reliability compared with wind power generation alone and solar power generation alone However, a grid-connected micro grid suffers from critical stability problems during a power grid failure. For stable operation of the micro grid during a grid failure. In this paper, the transition stability of the micro grid is examined during
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22

Son, Hyun-Il, Ki-Ryang Kwon, and Jin-O. Kim. "Reliability Analysis of Power System with Dependent Failure." Journal of the Korean Institute of Illuminating and Electrical Installation Engineers 25, no. 9 (2011): 62–68. http://dx.doi.org/10.5207/jieie.2011.25.9.062.

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23

Banasik, Kornelia, and Andrzej Łukasz Chojnacki. "Impact of Weather Conditions on Reliability Indicators of Low-Voltage Cable Lines." Electricity 5, no. 3 (2024): 606–21. http://dx.doi.org/10.3390/electricity5030030.

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This article examines the impact of meteorological conditions represented by ambient temperature, ambient humidity, wind speed, and daily precipitation sum on the reliability of low-voltage cable lines. Cable line reliability is crucial to the stability and safety of power systems. Failure of cable lines can lead to power outages. This can cause serious economic and social consequences, as well as threaten human safety, especially in the public sector and critical infrastructure. In addition, any interruption of cable lines generates costs related to repairs, operational losses, and possible c
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24

Zhu, Dan Dan, Wen Ying Liu, Quan Cheng Lv, Wei Zhou Wang, and Ning Bo Wang. "Forewarning of Cascading Failure Based on Comprehensive Entropy of Power Flow." Applied Mechanics and Materials 615 (August 2014): 74–79. http://dx.doi.org/10.4028/www.scientific.net/amm.615.74.

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The comprehensive entropy of power flow is proposed in this paper based on the current entropy of power flow. The comprehensive entropy can not only describe the heterogeneity of the power flow distribution, but also takes the considerable effect of the high load rate lines on the cascading failure into consideration. Thus it can reflect the operation state in a more comprehensive way compared with the current entropy of power flow. A forewarning model which employs the comprehensive entropy as a forewarning index is also presented. And the case analysis verifies that the proposed forewarning
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Zhang, Fu Chao, and Jia Dong Huang. "Power System Cascading Failure Risk Assessment Model Based on Graph Theory." Applied Mechanics and Materials 496-500 (January 2014): 2844–47. http://dx.doi.org/10.4028/www.scientific.net/amm.496-500.2844.

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In recent years, large-scale power blackouts occur frequently in power system, resulting in extremely serious economic losses and social impact [. Scholars from various countries have made various levels of analysis on the causes of widespread blackouts from different angles [2-.The results show that most of the fault are caused by the cascading failure, and the linkage and relevance between failures are typical of such events. Accordingly, to strengthen the analysis of cascading has important significances on preventing the occurrence of large-scale power blackouts.
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Upasana, Sharma, and Singh Avtar. "Reliability analysis of captive power plant system where the working of standby unit depends on connecting unit." International Journal of ADVANCED AND APPLIED SCIENCES 9, no. 8 (2022): 72–78. http://dx.doi.org/10.21833/ijaas.2022.08.009.

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Captive power plants usually operate parallel to the gridline to overcome the losses associated with power failures. While the connectivity of the power plant and gridline highly depends on the functioning of the electrical breaker. This study reveals the importance of connecting device breakers in a captive power plant to operate the system at full or reduced capacity and safer it from reverse feeding. Using semi-Markov processes reliability model is developed for steam turbine generators interconnected with gridline by an electric breaker. The expressions are formed for reliability measures
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Zhang, Long Yue, Li Jie Ding, Xian Yong Xiao, Chao Ma, and Jing Feng. "Risk Assessment of Power System Cascading Failure Considering Hidden Failures and Violation of Temperature." Advanced Materials Research 354-355 (October 2011): 1083–87. http://dx.doi.org/10.4028/www.scientific.net/amr.354-355.1083.

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A method was proposed to throw light on the initial period of cascading failure that would be the best time to implement prediction and prevention. A more accurate hidden failure model which considers fault locations and protection schemes was created, as well as a conductor temperature-outage probability model depicting tree-to-line contacts happened in the blackout frequently. It reveals the physical process of cascading failure more clearly and demonstrates that differently located fault which may trigger different PEFD of hidden failures and different ambient situations can both result in
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Popović, Ivan, Milan Đorđević, Jasmina Skerlić, Ivica Čamagić, and Snežana Kirin. "Determining the reliability function of the thermal power system in power plant 'Nikola Tesla, Block B1' using the Weibull distribution." Structural Integrity and Life 24, no. 2 (2024): 145–49. http://dx.doi.org/10.69644/ivk-2024-02-0145.

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The assessment of thermal power system reliability represents a key step towards maintaining the stability and efficiency of the system. Through the application of mathematical models, risk analysis, and maintenance strategies, it is possible to optimise system performance and reduce the risk of failures. This paper presents an assessment of the reliability of the thermal energy system in fossil fuel power plant ‘Nikola Tesla, Block B1’, based on a twelve-year failure database. By implementing the theory of reliability, based on statistics and theory of possibility, and using the simple and co
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29

Sukharev, D. Yu. "Assessment of efficiency improvement reserves of maintenance and repair systems of high-voltage electrical equipment of industrial enterprises." Russian Journal of Industrial Economics 16, no. 2 (2023): 62–72. http://dx.doi.org/10.17073/2072-1633-2023-2-190-200.

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The problems of choosing a strategy for the maintenance of the equipment of the power supply system of an industrial enterprise, taking into account the risk its failure and the problem of distributing the volume of the repair program in order to reduce maintenance costs and, accordingly, the cost of production, are considered. A method for assessing the magnitude of risk for the technological process of an industrial enterprise of the metallurgical industry, taking into account the power supply scheme of the electric receiver, is proposed. Special attention is paid to taking into account the
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30

Mukti, Doni Abdul, and Budi Sudiarto. "Analysis of The Failure Protection System 20 KV CBO T75B Substation Malibu Feeder PT PLN (Persero) UP3 Menteng." Syntax Literate ; Jurnal Ilmiah Indonesia 6, no. 2 (2021): 1422. http://dx.doi.org/10.36418/syntax-literate.v6i2.5272.

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Protection is a safety in the electric power system installed in the electric power distribution system, power transformer, electric power transmission, and electric generator used to secure the power system electricity from electrical disturbances or overloads by separating the disturbed parts of the electric power system from the undisturbed electrical power system so that the undisturbed electrical system can continue to work. The protection system at the T75B substation has a work failure where when there is a short circuit on the consumer side, it causes the PMT (Power Breaker) for the Ma
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31

Otasowie, P. O., and O. Siloko. "Design and Implementation of a Power Failure Home Lighting System Using LED Arrays." Advanced Materials Research 824 (September 2013): 108–13. http://dx.doi.org/10.4028/www.scientific.net/amr.824.108.

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This paper is on the design and implementation of a power failure lighting system using light emitting diodes (LED) arrays. The aim of this work is to design and implement a lighting system that can provide low power at home when there is power failure. The lighting system was achieved by the design of the: Power Supply Unit, Charging Unit, Change Over Switch, Battery Level Indicator, LED arrays.The power failure home lighting system was designed and implemented in a three bedroom flat apartment in Benin City when there was power failure. The total lighting points in the house consume a total
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Lukovenko, A. S., and I. V. Zenkov. "Methods for calculating the reliability of power supply systems." Proceedings of Irkutsk State Technical University 25, no. 1 (2021): 57–65. http://dx.doi.org/10.21285/1814-3520-2021-1-57-65.

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The aim was to determine the reliability indicators of a power supply system using an artificial neural network model. A model for calculating technical reliability was developed using the following methods: an algorithm for calculating reliability indicators of power supply systems, the method of failure rate of a power supply system and a forecasting model using artificial neural networks. It was established that a power supply system is formed by an open radial power supply circuit. The failure rate of the power supply subsystem was determined by calculating the failure rate of i-th element
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Shin, Joong-Woo, Kwang-Hoon Yoon, Hui-Seok Chai, and Jae-Chul Kim. "Reliability-Centered Maintenance Scheduling of Photovoltaic Components According to Failure Effects." Energies 15, no. 7 (2022): 2529. http://dx.doi.org/10.3390/en15072529.

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In the power distribution system of South Korea, the sectionalizer minimizes and recovers the system from failures, and prohibits independent operation of distributed energy resources. Therefore, it is difficult to expect reliability improvements owing to a photovoltaic system in the power distribution system. Herein, we propose a reliability-centered maintenance-scheduling method based on an economic analysis of photovoltaic integration facilities to ensure the economic feasibility of the photovoltaic system operator and the reliability of the power distribution system. Photovoltaic integrati
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RICHARDSON, M. G., and A. P. BASU. "INFERENCES ON THE PARAMETERS AND SYSTEM RELIABILITY FOR A FAILURE-TRUNCATED POWER LAW PROCESS: A BAYESIAN APPROACH USING A CHANGE-POINT." International Journal of Reliability, Quality and Safety Engineering 11, no. 02 (2004): 175–85. http://dx.doi.org/10.1142/s0218539304001439.

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The reliability of a repairable system that is either improving or deteriorating depends on the system's chronological age. If such a system undergoes "minimal repair" at the occurrence of each failure so that the rate of system failures is not disturbed by the repair, then a nonhomogeneous Poisson process (NHPP) may be used to model the "age-dependent" reliability of the system. The power law process (PLP) is a model within the class of NHPP models and is commonly used as a model for describing the failure times of a repairable system. We introduce a new model that is an extension of the PLP
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Zhang, Fu Chun, Jia Dong Huang, Xin Sun, and Qing Jie Zhou. "The Research on Risk Assessment Model of Cascading Failures in Power System." Applied Mechanics and Materials 373-375 (August 2013): 1312–17. http://dx.doi.org/10.4028/www.scientific.net/amm.373-375.1312.

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In order to prevent large scope blackouts, the paper has established a model of power system cascading failures from the perspective of risk .Taking both the load of branch and the power flow changes into account, the model defines the probability of branch outage which can reflect the real-time operating condition. The consequences severity of cascading failure is measured by bus low voltage, power line overload level and the amount of isolated loads. In the process of searching fault link, the paper uses the structure transmission importance of branch to determine the next breaking branch, w
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Malila, Mumba. "Skirting the Justice System through Presidential Clemency in Zambia: Some Critical Reflections." African Journal of International and Comparative Law 30, no. 3 (2022): 402–23. http://dx.doi.org/10.3366/ajicl.2022.0416.

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Presidential or executive power of pardoning convicted offenders is, generally speaking, beyond ordinary checks and balances. It could arguably be one of the most controversial of executive powers prone to abuse by the political elite. To the extent that the power sanctions the circumvention of the justice system by undoing, sidestepping, and interfering with some judicial outcomes, its appropriateness has been questioned as being possibly a serious indictment on the separation of powers and the rule of law. This contribution focuses on the use of the presidential power of clemency in Zambia a
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Liu, Yuxiao, Yi Wang, Pei Yong, Ning Zhang, Chongqing Kang, and Dan Lu. "Fast Power System Cascading Failure Path Searching With High Wind Power Penetration." IEEE Transactions on Sustainable Energy 11, no. 4 (2020): 2274–83. http://dx.doi.org/10.1109/tste.2019.2953867.

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Yang, Jing Wei, and Meng Meng Xu. "Failure Model Research of Power HBTs." Advanced Materials Research 926-930 (May 2014): 1348–51. http://dx.doi.org/10.4028/www.scientific.net/amr.926-930.1348.

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Heterojunction bipolar transistors (HBTs) are playing an important role in microwave and power applications. When HBTs operated at high power, the power dissipation and self-heating effects will enable the generation of electrical properties in the transistor failure. The failure experiment system of microwave power HBTs was established. Based on this system, the changes of electrical parameters of HBTs in deferent stress, such as Gummel plots, base current various different base-emitter voltage and base-collector voltage, were measured and analyzed. At the same time, the failure of base curre
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Wang, Xiao Ming, Qi Zhang, and Bin Qian. "Reactive Power Compensation Method of HVDC Commutation Failure." Applied Mechanics and Materials 536-537 (April 2014): 1510–13. http://dx.doi.org/10.4028/www.scientific.net/amm.536-537.1510.

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In the high-voltage direct current transmission system, the difference value between the landing phase voltage and DC transmission system commutation failure of the critical voltage drop value, as system occurred in the critical value of commutation failure. When commutation voltage lower than the critical value would reduce arc Angle, caused by commutation failure。Therefore, by using the method of reactive power compensation to keep converter bus voltage stability, can avoid commutation failure.
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A. Rajapaksha, A.A. Sunethra, and M.R. Sooriyarachchi. "ANALYZING THE RELIABILITY OF A PERSONAL COMPUTER SYSTEM USING FAULT TREE ANALYSIS." EPH - International Journal of Science And Engineering 1, no. 2 (2015): 24–33. http://dx.doi.org/10.53555/eijse.v1i2.44.

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A system can be defined as a set of components interconnected to perform a given task. Such a system has a high possibility of failure compared to a single component, since it is a combination of different components consisting of different failure types. Thus, the analysis of failures of such systems should take into account both the time to failure and the type of the failure. The specialty in multiple failure type systems is that the failure occurrences yielding from different failure types cannot be regarded as independent from each other. Fault Tree Analysis (FTA) enables to address the p
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A. Rajapaksha, A.A. Sunethra, and M.R. Sooriyarachchi. "ANALYZING THE RELIABILITY OF A PERSONAL COMPUTER SYSTEM USING FAULT TREE ANALYSIS." EPH - International Journal of Science And Engineering 1, no. 4 (2015): 33–43. http://dx.doi.org/10.53555/eijse.v1i4.107.

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A system can be defined as a set of components interconnected to perform a given task. Such a system has a high possibility of failure compared to a single component, since it is a combination of different components consisting of different failure types. Thus, the analysis of failures of such systems should take into account both the time to failure and the type of the failure. The specialty in multiple failure type systems is that the failure occurrences yielding from different failure types cannot be regarded as independent from each other. Fault Tree Analysis (FTA) enables to address the p
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42

Zope, Sanika, and Nitin Zope. "Unveiling Transformer Failures: Insights from Utilities Repaired Transformers and Their Revival." International Journal of Innovative Research in Engineering and Management 12, no. 1 (2025): 52–59. https://doi.org/10.55524/ijirem.2025.12.1.8.

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Power transformer failures pose a significant challenge to power utilities, leading to service interruptions, costly repairs, and operational inefficiencies. In Maharashtra, the State Transmission Utility has observed a marked increase in transformer failures over recent years, negatively impacting service reliability and increasing operational costs. This paper investigates the root causes of these failures using Failure Mode and Effects Analysis (FMEA), supported by MATLAB-based modelling by collecting the comprehensive data related to transformer failures. The analysis focuses on identifyin
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Wu, Qian Jin, and Xue Zhi Wang. "The Summary of HVDC Commutation Failure and Example Analysis." Applied Mechanics and Materials 446-447 (November 2013): 853–57. http://dx.doi.org/10.4028/www.scientific.net/amm.446-447.853.

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Commutation Failure is the common fault of HVDC, continuous commutation failure may lead to HVDC block and affect the stability of the power system. Especially in southern power grid, china, its special that the end of four HVDC system are all in Guangzhou. If the AC system occurs serious fault, all of the HVDC system may occur commutation Failure, HVDC block, even occurs large area blackout. So how to avoid continuous commutation failure and restore the stability of HVDC is important for AC and DC parallel power system. This paper based on the mechanism of commutation failure, analyze the rea
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Siswantoro, Nurhadi, Dwi Priyanta, Enggar Dywari Suminta, et al. "The Maintenance Task Allocation Analysis in Steam Power Plant: Case Study on Closed Cooling Water System." IOP Conference Series: Earth and Environmental Science 972, no. 1 (2022): 012031. http://dx.doi.org/10.1088/1755-1315/972/1/012031.

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Abstract The closed cooling system is one of the systems that functioned to ensure the cooling water supply can be continuously distributed and ensure that the production process does not cause the equipment or products to overheat, which can result in failure to the equipment and affect the production process due to downtime repair. Reliability Centered Maintenance (RCM) is one of the methods that can be used to analyze the cause of failure, impact, and determination of appropriate and effective maintenance tasks. The purpose of this research is to identify potential failures, determine the m
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Li, Lijuan, Zeyu Li, Zheng Gong, Hongliang Liu, Yuan Li, and Yongdong Chen. "Dual Hidden Failure Model for Cyber Physical Power System." IEEE Access 8 (2020): 186148–56. http://dx.doi.org/10.1109/access.2020.3028933.

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Ribeiro, Luis Carlos, Levy Ely de Lacerda de Oliveira, Erik Leandro Bonaldi, et al. "Automatic System for Failure Detection in Hydro-Power Generators." Journal of Power and Energy Engineering 02, no. 04 (2014): 36–46. http://dx.doi.org/10.4236/jpee.2014.24006.

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Kumar, Sandeep. "Reliability Assessment of Power Plant Operations through Boolean Function Expansion and Mean Time to Failure Analysis." European Journal of Applied Science, Engineering and Technology 2, no. 2 (2024): 320–29. http://dx.doi.org/10.59324/ejaset.2024.2(2).23.

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This paper presents an investigation into the reliability assessment of power plant operations using Boolean Function expansion and Mean Time to Failure (MTTF) analysis. The study focuses on a complex system comprising two power generators within a power house. The primary objective of this system i. This paper presents an investigation into the reliability assessment of power plant operations using Boolean Function expansion and Mean Time to Failure (MTTF) analysis. The study focuses on a complex system comprising two power generators within a power house. The primary objective of this system
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Kumar, Sandeep. "Reliability Assessment of Power Plant Operations through Boolean Function Expansion and Mean Time to Failure Analysis." European Journal of Applied Science, Engineering and Technology 2, no. 2 (2024): 320–29. https://doi.org/10.59324/ejaset.2024.2(2).23.

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This paper presents an investigation into the reliability assessment of power plant operations using Boolean Function expansion and Mean Time to Failure (MTTF) analysis. The study focuses on a complex system comprising two power generators within a power house. The primary objective of this system i. This paper presents an investigation into the reliability assessment of power plant operations using Boolean Function expansion and Mean Time to Failure (MTTF) analysis. The study focuses on a complex system comprising two power generators within a power house. The primary objective of this system
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Chen, Taizhong. "Research on the design of non-invasive load monitoring system." Applied and Computational Engineering 55, no. 1 (2024): 81–86. http://dx.doi.org/10.54254/2755-2721/55/20241663.

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In industrial production, machine failure will cause production efficiency decline, maintenance costs increase and other problems, while the traditional manual maintenance can only be carried out after the failure, cannot play an early warning effect, and has low efficiency. Non-invasive load identification and condition estimation can predict upcoming failures, remind maintenance in time, reduce failures, and improve production efficiency. In this paper, a non-intrusive load monitoring system is designed based on a non-contact high-frequency synchronous power data acquisition device. A non-in
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Rangel Bessa, Alcebíades, Jussara Farias Fardin, Patrick Marques Ciarelli, and Lucas Frizera Encarnação. "Conventional Dissolved Gases Analysis in Power Transformers: Review." Energies 16, no. 21 (2023): 7219. http://dx.doi.org/10.3390/en16217219.

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Transformers insulated with mineral oil tend to form gases, which might be caused by system faults or extended use. Based on an evaluation of the main failure analysis techniques using combustible gases, this study reviewed the conventional techniques for Dissolved Gas Analysis (DGA), present in the norms IEC 60599 and IEEE Std C57.104, and their failure analysis tendency. Furthermore, to illustrate distinct technique performances and failures, the performance of the following techniques was analyzed based on the IEC TC10 database: Dornenburg, Duval Triangle, Duval Pentagon, IEC ratio method,
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