Pub Date : 2017-12-13DOI: 10.1007/978-3-319-69407-8
A. Conejo, L. Baringo
{"title":"Power System Operations","authors":"A. Conejo, L. Baringo","doi":"10.1007/978-3-319-69407-8","DOIUrl":"https://doi.org/10.1007/978-3-319-69407-8","url":null,"abstract":"","PeriodicalId":225654,"journal":{"name":"2006 Large Engineering Systems Conference on Power Engineering","volume":"63 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-12-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131263100","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}
Pub Date : 2017-09-14DOI: 10.1109/lescpe.2006.280350
D. Kadam
Increasing size of wind farm connected to grid will lead to various challenges such as power quality and reactive power control during normal operation and fault ride through capability during fault conditions. Considering the challenges to be faced related to interfacing of large wind farms using Induction generators, it is necessary to study the various power quality, stability and reactive power requirement of large-scale wind farm connected to grid and provide cost effective solution for management of power quality and reactive power. Power quality problems such as voltage sag, swell, under voltage, over voltage along with rotor stability issues are some major concern. In this paper all issues are analysed. Wind turbine connected to squirrel cage induction generator is modelled using PSCAD simulation software to analyse the said issues where STATCOM is introduced as an active voltage and reactive power supporter to increase the power system stability. STATCOM unit is developed to inject reactive power for mitigation of power quality problems and to get stable grid operation.
{"title":"Power Quality Issues","authors":"D. Kadam","doi":"10.1109/lescpe.2006.280350","DOIUrl":"https://doi.org/10.1109/lescpe.2006.280350","url":null,"abstract":"Increasing size of wind farm connected to grid will lead to various challenges such as power quality and reactive power control during normal operation and fault ride through capability during fault conditions. Considering the challenges to be faced related to interfacing of large wind farms using Induction generators, it is necessary to study the various power quality, stability and reactive power requirement of large-scale wind farm connected to grid and provide cost effective solution for management of power quality and reactive power. Power quality problems such as voltage sag, swell, under voltage, over voltage along with rotor stability issues are some major concern. In this paper all issues are analysed. Wind turbine connected to squirrel cage induction generator is modelled using PSCAD simulation software to analyse the said issues where STATCOM is introduced as an active voltage and reactive power supporter to increase the power system stability. STATCOM unit is developed to inject reactive power for mitigation of power quality problems and to get stable grid operation.","PeriodicalId":225654,"journal":{"name":"2006 Large Engineering Systems Conference on Power Engineering","volume":"3 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-09-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127019723","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}
Pub Date : 2006-07-26DOI: 10.1109/LESCPE.2006.280385
A. El-Gallad, M. El-Hawary
This paper introduces a new swarm optimizer based on multi-criterion decision making (MCDM). Agents inside the swarm are making decision toward their candidate moves in the search space. Decision making alternatives are defined from set of swarm basis behaviors. Fitness and diversity are two criteria that used to measure the performance of every alternative. Levenshtien edit distance is used to compute the distance between two positions in genotype space. Criteria are then standardized by means of fuzzy sets. Fuzzyfied values of criteria are then aggregated by the fuzzy ordered weighted average (OWA) to reach single evaluation function. Overall decision making process is made to promote both fitness and diversity
{"title":"A Swarm Optimizer Based on Multi-Criterion Decision Making, part I: Theoretical investigation","authors":"A. El-Gallad, M. El-Hawary","doi":"10.1109/LESCPE.2006.280385","DOIUrl":"https://doi.org/10.1109/LESCPE.2006.280385","url":null,"abstract":"This paper introduces a new swarm optimizer based on multi-criterion decision making (MCDM). Agents inside the swarm are making decision toward their candidate moves in the search space. Decision making alternatives are defined from set of swarm basis behaviors. Fitness and diversity are two criteria that used to measure the performance of every alternative. Levenshtien edit distance is used to compute the distance between two positions in genotype space. Criteria are then standardized by means of fuzzy sets. Fuzzyfied values of criteria are then aggregated by the fuzzy ordered weighted average (OWA) to reach single evaluation function. Overall decision making process is made to promote both fitness and diversity","PeriodicalId":225654,"journal":{"name":"2006 Large Engineering Systems Conference on Power Engineering","volume":"126 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-07-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127479936","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}
Pub Date : 2006-07-26DOI: 10.1109/LESCPE.2006.280373
M. El-Naimi, S. Soliman
This paper presents a new derivative-based power system frequency estimation approach for measuring the power system frequency. The proposed algorithm uses the digitized samples of the voltage or current signal at the relay location, together with the least error squares to estimate the signal frequency. Different simulated examples are reported in the paper. Effects of disturbances and harmonics on the estimated frequency are studied in this paper. It has been shown that the proposed algorithm is succeeded in estimating the signal parameters
{"title":"Derivative-Based Power System Frequency Estimation","authors":"M. El-Naimi, S. Soliman","doi":"10.1109/LESCPE.2006.280373","DOIUrl":"https://doi.org/10.1109/LESCPE.2006.280373","url":null,"abstract":"This paper presents a new derivative-based power system frequency estimation approach for measuring the power system frequency. The proposed algorithm uses the digitized samples of the voltage or current signal at the relay location, together with the least error squares to estimate the signal frequency. Different simulated examples are reported in the paper. Effects of disturbances and harmonics on the estimated frequency are studied in this paper. It has been shown that the proposed algorithm is succeeded in estimating the signal parameters","PeriodicalId":225654,"journal":{"name":"2006 Large Engineering Systems Conference on Power Engineering","volume":"28 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-07-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115908081","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}
Pub Date : 2006-07-26DOI: 10.1109/LESCPE.2006.280384
A. L. El-Gallad, M. El-Hawary
Instead of exploration and exploitation, this paper utilizes the gregarious behavior and social intolerance demonstrated in animal aggregations to introduce a new formulation of swarm optimizers. The balance between the two dynamic forces resulting from gregariousness and social intolerance is used to define a new set of basic behavior, which if combined together, will lead to swarm formations. Individuals inside the swarm are treated as agents that enjoy certain degrees of free will in order to generate sources of novelty in every move within the domain space
{"title":"Gregariousness vs. Social Intolerance: Towards New Dynamism in Swarm Optimizers","authors":"A. L. El-Gallad, M. El-Hawary","doi":"10.1109/LESCPE.2006.280384","DOIUrl":"https://doi.org/10.1109/LESCPE.2006.280384","url":null,"abstract":"Instead of exploration and exploitation, this paper utilizes the gregarious behavior and social intolerance demonstrated in animal aggregations to introduce a new formulation of swarm optimizers. The balance between the two dynamic forces resulting from gregariousness and social intolerance is used to define a new set of basic behavior, which if combined together, will lead to swarm formations. Individuals inside the swarm are treated as agents that enjoy certain degrees of free will in order to generate sources of novelty in every move within the domain space","PeriodicalId":225654,"journal":{"name":"2006 Large Engineering Systems Conference on Power Engineering","volume":"140 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-07-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131556434","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}
Pub Date : 2006-07-26DOI: 10.1109/LESCPE.2006.280366
S. M. Elkhodary, L. Nasrat
Solid insulators breakdown mechanism is always associated with surface leakage current. Surface leakage current causes surface tracking. Surface tracking in non-ceramic insulators is an unwanted phenomenon, which cannot be accurately predicted. This paper introduces an experimental and analytical technique to predict the insulator life time, and presents an experimental measurements of the surface leakage current against time of nonceramic insulators on naturally aged insulators and artificially contaminated material. A comparison of surface leakage current for fourteen different type of non-ceramic materials under the same conditions is also introduced in this paper (the mentioned nonceramic materials are mainly silicon rubber (SR) and poly propylene (PP), with different filler percentage). The study of the leakage current dependence on the insulators contamination level is also presented in this paper. Different prototype of artificial neural networks-based system that can estimate the insulator age under different contamination level at the surface of polymer insulators by employing the experimentally measured leakage current was constructed in this paper. The proposed prototype is trained for different filler level for different insulator type in the neural network. The proposed technique in this paper predicts the best non-ceramic insulator with the exact filler percentage that withstands higher voltage with longer life time under contaminated weather and polluted condition. The proposed technique is considered to be helpful tool in the area of quality control
{"title":"The Use of Experimental and Artificial Neural Network Technique to Estimate Age against Surface Leakage Current for Non-ceramic Insulators","authors":"S. M. Elkhodary, L. Nasrat","doi":"10.1109/LESCPE.2006.280366","DOIUrl":"https://doi.org/10.1109/LESCPE.2006.280366","url":null,"abstract":"Solid insulators breakdown mechanism is always associated with surface leakage current. Surface leakage current causes surface tracking. Surface tracking in non-ceramic insulators is an unwanted phenomenon, which cannot be accurately predicted. This paper introduces an experimental and analytical technique to predict the insulator life time, and presents an experimental measurements of the surface leakage current against time of nonceramic insulators on naturally aged insulators and artificially contaminated material. A comparison of surface leakage current for fourteen different type of non-ceramic materials under the same conditions is also introduced in this paper (the mentioned nonceramic materials are mainly silicon rubber (SR) and poly propylene (PP), with different filler percentage). The study of the leakage current dependence on the insulators contamination level is also presented in this paper. Different prototype of artificial neural networks-based system that can estimate the insulator age under different contamination level at the surface of polymer insulators by employing the experimentally measured leakage current was constructed in this paper. The proposed prototype is trained for different filler level for different insulator type in the neural network. The proposed technique in this paper predicts the best non-ceramic insulator with the exact filler percentage that withstands higher voltage with longer life time under contaminated weather and polluted condition. The proposed technique is considered to be helpful tool in the area of quality control","PeriodicalId":225654,"journal":{"name":"2006 Large Engineering Systems Conference on Power Engineering","volume":"3 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-07-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114223797","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}
Pub Date : 2006-07-26DOI: 10.1109/LESCPE.2006.280353
A. Sharaf, R. Chhetri
The paper presents a novel effective energy conservation, utilization and power quality enhancement devices for damping switching transients and load excursion using modulated filter and capacitor compensator (MPF/C) Green Plug developed by Dr A.M Sharaf for 2 phase, 3 wire household load. The novel tri loop Sharaf's dynamic error driven controller is fully validated. The switching transients and load disturbances are greatly reduced. The neutral voltage is also lowered and the supply power factor is improved, hence the power utilization is enhanced. The validation study had been done for balanced linear load, unbalanced linear load and unbalanced non linear type load with and without the (MPF/C) compensator. Simulation study is made for ground type fault, short circuit faults, and open circuit type faults. Satisfactory results are compared without and with the use of the tri loop dynamic error driven controller and the MPF/C devices
{"title":"A Novel Household Efficient Power/Energy Utilization and Power Quality Compensator Devices","authors":"A. Sharaf, R. Chhetri","doi":"10.1109/LESCPE.2006.280353","DOIUrl":"https://doi.org/10.1109/LESCPE.2006.280353","url":null,"abstract":"The paper presents a novel effective energy conservation, utilization and power quality enhancement devices for damping switching transients and load excursion using modulated filter and capacitor compensator (MPF/C) Green Plug developed by Dr A.M Sharaf for 2 phase, 3 wire household load. The novel tri loop Sharaf's dynamic error driven controller is fully validated. The switching transients and load disturbances are greatly reduced. The neutral voltage is also lowered and the supply power factor is improved, hence the power utilization is enhanced. The validation study had been done for balanced linear load, unbalanced linear load and unbalanced non linear type load with and without the (MPF/C) compensator. Simulation study is made for ground type fault, short circuit faults, and open circuit type faults. Satisfactory results are compared without and with the use of the tri loop dynamic error driven controller and the MPF/C devices","PeriodicalId":225654,"journal":{"name":"2006 Large Engineering Systems Conference on Power Engineering","volume":"21 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-07-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123702559","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}
Pub Date : 2006-07-26DOI: 10.1109/LESCPE.2006.280356
D. McGillis, K. El-Arroudi, R. Brearley, G. Joós
The purpose of this paper is to introduce a new approach to the process of system collapse based on areas of vulnerability. For this purpose, a new category of contingencies called abnormal contingencies and a new system operating state called verge-of-collapse are proposed. The application of these abnormal contingencies to the vulnerable areas can lead to a system on the verge-of-collapse. In particular, there are two conditions that generally occur for a system to be on the verge-of-collapse: firstly, the system is in a degraded state or close to its operation limits and secondly it must be subjected to abnormal contingencies in the areas of vulnerability. The result of this study is to define areas of vulnerability in a network which can then be identified and appropriate remedial action initiated when required. Different stages are required for the protection of systems on the verge of collapse, namely: a) how to define areas of vulnerability, b) how to identify these areas of vulnerability and c) how to protect the system in the presence of areas of vulnerability. This paper is the first stage in proposing a new approach to the protection of systems on the verge of collapse
{"title":"The Process of System Collapse Based on Areas of Vulnerability","authors":"D. McGillis, K. El-Arroudi, R. Brearley, G. Joós","doi":"10.1109/LESCPE.2006.280356","DOIUrl":"https://doi.org/10.1109/LESCPE.2006.280356","url":null,"abstract":"The purpose of this paper is to introduce a new approach to the process of system collapse based on areas of vulnerability. For this purpose, a new category of contingencies called abnormal contingencies and a new system operating state called verge-of-collapse are proposed. The application of these abnormal contingencies to the vulnerable areas can lead to a system on the verge-of-collapse. In particular, there are two conditions that generally occur for a system to be on the verge-of-collapse: firstly, the system is in a degraded state or close to its operation limits and secondly it must be subjected to abnormal contingencies in the areas of vulnerability. The result of this study is to define areas of vulnerability in a network which can then be identified and appropriate remedial action initiated when required. Different stages are required for the protection of systems on the verge of collapse, namely: a) how to define areas of vulnerability, b) how to identify these areas of vulnerability and c) how to protect the system in the presence of areas of vulnerability. This paper is the first stage in proposing a new approach to the protection of systems on the verge of collapse","PeriodicalId":225654,"journal":{"name":"2006 Large Engineering Systems Conference on Power Engineering","volume":"1995 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-07-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128227678","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}
Pub Date : 2006-07-26DOI: 10.1109/LESCPE.2006.280354
F. Chen, Lin Wang, Weidong Liu, T. Mander, R. Cheung
Harmonic disturbances caused by non-linear loads such as power switching devices often occur in the industrial and commercial power distribution systems and can damage sensitive equipment connected to the systems, causing tremendous productivity loss. This paper presents an adaptive-harmonic detection-algorithm (AHDA) active filter for effective elimination of harmonic disturbances. This filter consists of a standard power electronic inverter with state-of-the-art digital signal processor (DSP) control. The AHDA filter is efficient due to its adaptive harmonic detection algorithm for various powerline conditions. The algorithm is based on a novel noise cancellation theory that was designed for applications outside power electronics. This paper presents a practical formulation of the algorithm to significantly simplify the original complex formulation for noise cancellations. This paper details the DSP-based hardware and software implementations of the AHDA filter. This filter achieved high operational reliability and cost effectiveness. Simulation and experimental results are provided
{"title":"Adaptive Active Power Line Harmonic Filter for Industrial and Commercial Power Distribution Systems","authors":"F. Chen, Lin Wang, Weidong Liu, T. Mander, R. Cheung","doi":"10.1109/LESCPE.2006.280354","DOIUrl":"https://doi.org/10.1109/LESCPE.2006.280354","url":null,"abstract":"Harmonic disturbances caused by non-linear loads such as power switching devices often occur in the industrial and commercial power distribution systems and can damage sensitive equipment connected to the systems, causing tremendous productivity loss. This paper presents an adaptive-harmonic detection-algorithm (AHDA) active filter for effective elimination of harmonic disturbances. This filter consists of a standard power electronic inverter with state-of-the-art digital signal processor (DSP) control. The AHDA filter is efficient due to its adaptive harmonic detection algorithm for various powerline conditions. The algorithm is based on a novel noise cancellation theory that was designed for applications outside power electronics. This paper presents a practical formulation of the algorithm to significantly simplify the original complex formulation for noise cancellations. This paper details the DSP-based hardware and software implementations of the AHDA filter. This filter achieved high operational reliability and cost effectiveness. Simulation and experimental results are provided","PeriodicalId":225654,"journal":{"name":"2006 Large Engineering Systems Conference on Power Engineering","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-07-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126838296","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}
Pub Date : 2006-07-26DOI: 10.1109/LESCPE.2006.280377
S. Soliman, M. Belkhayat
Fault identification is necessary for system protection and the selection of suitable relays, which are required for the subsequent fault isolation. In this paper, fault identification is achieved using a simple and numerically efficient algorithm based on Park's transformations. The algorithm uses two transformation matrices. The first matrix is used to filter out the dc offset and harmonics that contaminate the three-phase voltage signal. The second transformation is used to estimate the positive and negative sequence components. The zero sequence components are estimated from the first transformation matrix. Results based on detailed system models are presented in the paper. Having identified the positive sequence, negative sequence and zero sequence components, the fault type can easily be identified
{"title":"Power Systems Fault Type Identification Based on Park's Transformation Algorithm","authors":"S. Soliman, M. Belkhayat","doi":"10.1109/LESCPE.2006.280377","DOIUrl":"https://doi.org/10.1109/LESCPE.2006.280377","url":null,"abstract":"Fault identification is necessary for system protection and the selection of suitable relays, which are required for the subsequent fault isolation. In this paper, fault identification is achieved using a simple and numerically efficient algorithm based on Park's transformations. The algorithm uses two transformation matrices. The first matrix is used to filter out the dc offset and harmonics that contaminate the three-phase voltage signal. The second transformation is used to estimate the positive and negative sequence components. The zero sequence components are estimated from the first transformation matrix. Results based on detailed system models are presented in the paper. Having identified the positive sequence, negative sequence and zero sequence components, the fault type can easily be identified","PeriodicalId":225654,"journal":{"name":"2006 Large Engineering Systems Conference on Power Engineering","volume":"49 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-07-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131900185","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}
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