Mousalreza Faramarzi, M. Tabibzadeh, Sina Mohseni, M. Jafari
{"title":"Automatic system for detection critical conditions in overhead lines distribution insulators based on leakage current analysis","authors":"Mousalreza Faramarzi, M. Tabibzadeh, Sina Mohseni, M. Jafari","doi":"10.1109/ICPS.2016.7490243","DOIUrl":"https://doi.org/10.1109/ICPS.2016.7490243","url":null,"abstract":"In this paper, a new automatic system has been proposed for critical conditions diagnosis of distribution insulators. In this regard, a variety of experiments have been conducted on different types of insulators under different environmental conditions. Leakage current harmonics on these experiments have been analyzed. Fast Fourier Transform (FFT) applied on leakage current waveforms and results show a strong correlation between third to fifth harmonics amplitude ratio regarding to insulators conditions. Therefore, third to fifth harmonics ratio of leakage current (R3/5) has been proposed as an indicator to diagnosis critical conditions in distribution insulators. Results demonstrate if value of index R3/5 becomes more than unit, it will be critical condition for insulator and high probability of flashover occurrence. Hence, an automatic system designed for critical conditions detection and flashover prediction using the index R3/5.","PeriodicalId":266558,"journal":{"name":"2016 IEEE/IAS 52nd Industrial and Commercial Power Systems Technical Conference (I&CPS)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130400211","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Phasor and directions of a bolted single-phase-ground fault current in a high-resistance grounded (HRG) power system","authors":"D. Paul","doi":"10.1109/ICPS.2016.7490258","DOIUrl":"https://doi.org/10.1109/ICPS.2016.7490258","url":null,"abstract":"This paper reviews the phasor and directions of a single-phase-ground fault current (s) in a high-resistance grounded (HRG) power system. A brief review of the published literature, which is inconsistent, has caused confusion on what should be the correct phasor and fault current directions to be used in dot standard P3003.1. An application concept that during single-phase-ground fault condition, “distributed capacitive current direction reverses in the two un-faulted phases” compared to the direction under normal system operation. This concept has been applied before [2] [6]; however, some application engineers raised the question on this concept. The concept is currently used in the modern ground fault protection relays used for HRG and ungrounded power systems. It has no impact on the operation of the power system during the phase-ground fault condition, but it helps in providing ground-fault current flow from faulted location to ground, a normal industry convention. The paper will provide guidance on how to update the contents of the HRG system contained in the current edition of IEEE STD. 142 to be used for Dot Standard P3003.1 [23].","PeriodicalId":266558,"journal":{"name":"2016 IEEE/IAS 52nd Industrial and Commercial Power Systems Technical Conference (I&CPS)","volume":"144 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127486156","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Determining Reliability of low voltage transfer switches","authors":"R. Arno, Mark Bunal, A. Travis, J. Weber","doi":"10.1109/ICPS.2016.7490247","DOIUrl":"https://doi.org/10.1109/ICPS.2016.7490247","url":null,"abstract":"The purpose of this Reliability investigation of this manufacturer's transfer switches was to create an engineering document; in which, one could find validated information on the Reliability of one of its most popular series of transfer switchgear. These numbers could then be applied to assess the Reliability of a power system in whole by system designers. The most recent published Reliability data for Automatic Transfer Switches in the IEEE STD 493 Gold Book cites MTBF as 274,853 hours for >600 Ampere models and 102,094 hours for 0 to 600 Ampere models. This analysis is intended to provide more recent and better-defined results; results that the industry can reflect upon. A reputable independent organization was contracted to perform the analysis and analyze the data.","PeriodicalId":266558,"journal":{"name":"2016 IEEE/IAS 52nd Industrial and Commercial Power Systems Technical Conference (I&CPS)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129936271","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
C. Yeh, C. S. Chen, T. Ku, C. H. Lin, C. Hsu, Y. R. Chang, Y. D. Lee
{"title":"Design of special protection system for an offshore island with high PV penetration","authors":"C. Yeh, C. S. Chen, T. Ku, C. H. Lin, C. Hsu, Y. R. Chang, Y. D. Lee","doi":"10.1109/icps.2016.7490254","DOIUrl":"https://doi.org/10.1109/icps.2016.7490254","url":null,"abstract":"An intelligent load-shedding strategy was designed and embedded in the special protection system (SPS) to enhance the system stability for an offshore island with high penetration of photovoltaic (PV) systems. To prepare the training data set for the artificial neural network (ANN), the transient stability analysis of the isolated power system was executed to determine the minimum amount of load to be interrupted to prevent the tripping of diesel generators for the emergency shutdown of PV systems. By selecting various combinations of PV penetration levels, total system load demand and the frequency decay rate at the instant of PV system tripping as the input neurons of the ANN, the proper load shedding scheme is derived and stored in the decision knowledge base of the SPS. When the intelligent energy management system (iEMS) detects the tripping of PV system, the SPS will be triggered to determine the amount of loss to be disconnected and executes the corresponding load interruption. By applying the proposed ANN based load shedding scheme in SPS, the amount of customer loading to be interrupted has been reduced dramatically for the restoration of system stability after the emergency shutdown of high penetration PV system.","PeriodicalId":266558,"journal":{"name":"2016 IEEE/IAS 52nd Industrial and Commercial Power Systems Technical Conference (I&CPS)","volume":"106 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134487823","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Considerations for differential protection in LV buses","authors":"L. Sevov, M. Valdes","doi":"10.1109/pcicon.2015.7435105","DOIUrl":"https://doi.org/10.1109/pcicon.2015.7435105","url":null,"abstract":"Current-differential principles are well known and commonly used for protection of medium and large size transformers, large motors, medium voltage (MV) generators, medium and high voltage buses, and any type of important power equipment with measurable input and output currents. However, is it practical to protect low voltage distribution buses using differential protection? This paper will describe bus differential protection principles as well as interlocking principles for overcurrent protection. It will discuss specific issues in applying differential protection in LV systems. It will present a concept of partial differential protection, which can be used in conjunction with Zone-Selective-Interlocking (ZSI), or as backup to traditional overcurrent protection to achieve high-speed and selective fault clearance. Additional concepts for implementation of bus differential protection using networked data in low voltage systems will be introduced.","PeriodicalId":266558,"journal":{"name":"2016 IEEE/IAS 52nd Industrial and Commercial Power Systems Technical Conference (I&CPS)","volume":"155 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114607079","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}