Pub Date : 2003-03-01DOI: 10.1109/PECON.2003.1437459
M. Ismail, M. Hassan, T. Winnie, A. Arof, K. M. Nor
The capacity of a battery can be predicted from calculation if the specific discharge capacity of the electrode active materials is known. In designing high capacity batteries that would increase the discharge lifetime, the size, thickness and area density of the electrode materials can be optimized. Such design is suitable in the operating temperature range between ambient to 60/spl deg/C. Above 60/spl deg/C, the discharge lifetime decreases quite significantly. It is already known that the transport properties of the conducting species in liquid electrolytes can be improved by the addition of fillers. This will further improve the discharge lifetime and lead to higher specific discharge capacity and specific energy. In the present work, the effects of adding fillers to the electrolyte on the performance of the fabricated batteries with LiCoO/sub 2///MCMB couple were investigated. With LICoO/sub 2///MCMB couple, the fabricated battery can be charged to 4.2 V. The performance of the battery was evaluated for constant discharge currents at different temperatures. It was observed that the discharge capacity of the battery improved with the addition of fillers in the electrolyte. The cells also showed low self-discharge performance.
{"title":"Designing lithium ion batteries for high power applications","authors":"M. Ismail, M. Hassan, T. Winnie, A. Arof, K. M. Nor","doi":"10.1109/PECON.2003.1437459","DOIUrl":"https://doi.org/10.1109/PECON.2003.1437459","url":null,"abstract":"The capacity of a battery can be predicted from calculation if the specific discharge capacity of the electrode active materials is known. In designing high capacity batteries that would increase the discharge lifetime, the size, thickness and area density of the electrode materials can be optimized. Such design is suitable in the operating temperature range between ambient to 60/spl deg/C. Above 60/spl deg/C, the discharge lifetime decreases quite significantly. It is already known that the transport properties of the conducting species in liquid electrolytes can be improved by the addition of fillers. This will further improve the discharge lifetime and lead to higher specific discharge capacity and specific energy. In the present work, the effects of adding fillers to the electrolyte on the performance of the fabricated batteries with LiCoO/sub 2///MCMB couple were investigated. With LICoO/sub 2///MCMB couple, the fabricated battery can be charged to 4.2 V. The performance of the battery was evaluated for constant discharge currents at different temperatures. It was observed that the discharge capacity of the battery improved with the addition of fillers in the electrolyte. The cells also showed low self-discharge performance.","PeriodicalId":136640,"journal":{"name":"Proceedings. National Power Engineering Conference, 2003. PECon 2003.","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2003-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114163522","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 : 1900-01-01DOI: 10.1109/PECON.2003.1437461
F. Sulaiman, A. Ahmad, A. Z. Ahmed
Polymer or plastic optical fibers' performance lies somewhere between conventional copper wires and glass optical fibers. Copper wires suffer from electromagnetic interference. By comparison, plastic optical fibers are free from interference. Compared to glass fibers, polymer optical fibers (POFs) are much easier to connect because of their large diameters. Coupling of light from the sun or from a source is also very efficient due to large NA and large core diameter. The most important attribute of POFs is their large core diameters of around 1 mm to 20 mm as compared to glass fibers with cores of 50/spl mu/m or 62.5/spl mu/m. Such a large diameter results in easier alignment at joints. Any transverse misalignment between the two cores across a joint between two fibers leads to a loss. Hence, this paper studies on the coupling efficiency of light from the sun as a natural light source to a step-index polymer optical fibers in comparison to glass fibers that results in larger light-gathering power for optical fiber daylighting system and in fiber decorative lighting. MATLAB simulation analysis shows that the coupling efficiency and light gathering power increases steadily with an increase in numerical aperture of the step-index PMMA polymer optical fiber that has higher and better light gathering power than step-index PMMA glass optical fiber.
{"title":"Coupling efficiency of polymer optical fiber for light-gathering power in optical fiber daylighting system","authors":"F. Sulaiman, A. Ahmad, A. Z. Ahmed","doi":"10.1109/PECON.2003.1437461","DOIUrl":"https://doi.org/10.1109/PECON.2003.1437461","url":null,"abstract":"Polymer or plastic optical fibers' performance lies somewhere between conventional copper wires and glass optical fibers. Copper wires suffer from electromagnetic interference. By comparison, plastic optical fibers are free from interference. Compared to glass fibers, polymer optical fibers (POFs) are much easier to connect because of their large diameters. Coupling of light from the sun or from a source is also very efficient due to large NA and large core diameter. The most important attribute of POFs is their large core diameters of around 1 mm to 20 mm as compared to glass fibers with cores of 50/spl mu/m or 62.5/spl mu/m. Such a large diameter results in easier alignment at joints. Any transverse misalignment between the two cores across a joint between two fibers leads to a loss. Hence, this paper studies on the coupling efficiency of light from the sun as a natural light source to a step-index polymer optical fibers in comparison to glass fibers that results in larger light-gathering power for optical fiber daylighting system and in fiber decorative lighting. MATLAB simulation analysis shows that the coupling efficiency and light gathering power increases steadily with an increase in numerical aperture of the step-index PMMA polymer optical fiber that has higher and better light gathering power than step-index PMMA glass optical fiber.","PeriodicalId":136640,"journal":{"name":"Proceedings. National Power Engineering Conference, 2003. PECon 2003.","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116920038","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 : 1900-01-01DOI: 10.1109/PECON.2003.1437471
Muhammad Murtadha Othman, A. Mohamed, A. Hussain
Power system deregulation has increased the need for determination of transmission reliability margin (TRM) which is the amount of transfer capability reserved to ensure that the transmission network is secure under a reasonable range of uncertainty in system operating conditions. This paper presents a computationally effective method in determining the TRM based on the first order sensitivity of transfer capability and certain probabilities. The first order sensitivity determines linearly the changes of transfer margin uncertainty with respect to the standard deviation uncertainty of transmission line reactances. The TRM is determined by considering the effect of maximum forecasted peak load during the outages of critical lines and generators. Verification of the TRM method is illustrated in conjunction with the determination of the available transfer capability and tested on a practical power system as a pragmatic case study.
{"title":"Transmission reliability margin assessment of the Malaysian power system","authors":"Muhammad Murtadha Othman, A. Mohamed, A. Hussain","doi":"10.1109/PECON.2003.1437471","DOIUrl":"https://doi.org/10.1109/PECON.2003.1437471","url":null,"abstract":"Power system deregulation has increased the need for determination of transmission reliability margin (TRM) which is the amount of transfer capability reserved to ensure that the transmission network is secure under a reasonable range of uncertainty in system operating conditions. This paper presents a computationally effective method in determining the TRM based on the first order sensitivity of transfer capability and certain probabilities. The first order sensitivity determines linearly the changes of transfer margin uncertainty with respect to the standard deviation uncertainty of transmission line reactances. The TRM is determined by considering the effect of maximum forecasted peak load during the outages of critical lines and generators. Verification of the TRM method is illustrated in conjunction with the determination of the available transfer capability and tested on a practical power system as a pragmatic case study.","PeriodicalId":136640,"journal":{"name":"Proceedings. National Power Engineering Conference, 2003. PECon 2003.","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116266455","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 : 1900-01-01DOI: 10.1109/PECON.2003.1437424
C. L. Toh, N. Idris, A. Yatim
This paper gives an overview to the principle of direct torque control (DTC) of induction machines (IM) drives. A summary to the various techniques of torque ripple reduction followed by a proposed simple method to reduce the torque ripple is also presented. Modeling and design methodology of this proposed method are given. Simulations of the proposed controllers were performed using MATLAB/SIMULINK simulation package. The results show that the controllers have managed to reduce the torque ripple significantly.
{"title":"Torque ripple reduction in direct torque control of induction motor drives","authors":"C. L. Toh, N. Idris, A. Yatim","doi":"10.1109/PECON.2003.1437424","DOIUrl":"https://doi.org/10.1109/PECON.2003.1437424","url":null,"abstract":"This paper gives an overview to the principle of direct torque control (DTC) of induction machines (IM) drives. A summary to the various techniques of torque ripple reduction followed by a proposed simple method to reduce the torque ripple is also presented. Modeling and design methodology of this proposed method are given. Simulations of the proposed controllers were performed using MATLAB/SIMULINK simulation package. The results show that the controllers have managed to reduce the torque ripple significantly.","PeriodicalId":136640,"journal":{"name":"Proceedings. National Power Engineering Conference, 2003. PECon 2003.","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132930621","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 : 1900-01-01DOI: 10.1109/PECON.2003.1437447
I. Musirin, T. Rahman
The line outage contingency was identified as one of the contributors to voltage instability problem. This event has led to significant financial losses in power system resulted from the failure in power operation and energy delivery. This paper presents a hybrid neural network topology (HNNT) for line outage contingency ranking. HNNT is a combination of artificial neural network (ANN) with a loading classifier and fundamental expert system modules. The post-outage severity was predicted by an ANN module trained using the Levenberg-Marquardt modified backpropagation. A line-based voltage stability index termed as fast voltage stability index (FVSI) was utilized as the indicator. Loading classifier distributed the post-outage severity into their respective loading condition. The contingency severities were consequently ranked into four categories using a rule-based module (RBM) that acts as the fundamental expert system. Validation was performed on the IEEE Reliability Test System (RTS) and results indicated that the proposed HNNT can be applied practically.
{"title":"Hybrid neural network topology (HNNT) for line outage contingency ranking","authors":"I. Musirin, T. Rahman","doi":"10.1109/PECON.2003.1437447","DOIUrl":"https://doi.org/10.1109/PECON.2003.1437447","url":null,"abstract":"The line outage contingency was identified as one of the contributors to voltage instability problem. This event has led to significant financial losses in power system resulted from the failure in power operation and energy delivery. This paper presents a hybrid neural network topology (HNNT) for line outage contingency ranking. HNNT is a combination of artificial neural network (ANN) with a loading classifier and fundamental expert system modules. The post-outage severity was predicted by an ANN module trained using the Levenberg-Marquardt modified backpropagation. A line-based voltage stability index termed as fast voltage stability index (FVSI) was utilized as the indicator. Loading classifier distributed the post-outage severity into their respective loading condition. The contingency severities were consequently ranked into four categories using a rule-based module (RBM) that acts as the fundamental expert system. Validation was performed on the IEEE Reliability Test System (RTS) and results indicated that the proposed HNNT can be applied practically.","PeriodicalId":136640,"journal":{"name":"Proceedings. National Power Engineering Conference, 2003. PECon 2003.","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134527199","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 : 1900-01-01DOI: 10.1109/PECON.2003.1437411
S. M. Nawi, J. Johari, A. F. Abidin
This paper represented an application of fuzzy logic to power quality issue. It describes the sources of harmonics detected, by using fuzzy sets and IF-THEN inferences rules. Harmonics can create unwanted impacts on power systems and to end-users. Electrical utilities, manufactures and customers have been bothered by harmonic distortion problems in power system. The harmonics is based on power quality and according to the IEEE 519-1992. The harmonic signals and spectrum are determined by the application of a fast Fourier transform (FFT). A fuzzy inference system is experimentally implemented for these cases, showing the general procedures of how to use this theory. It appears that fuzzy set theory can play an important rule in diagnosing power quality disturbances, and hence it can offer insights towards the satisfaction of the needs of manufacturers, utilities and customers.
{"title":"A fuzzy logic application for identification of harmonics disturbances sources","authors":"S. M. Nawi, J. Johari, A. F. Abidin","doi":"10.1109/PECON.2003.1437411","DOIUrl":"https://doi.org/10.1109/PECON.2003.1437411","url":null,"abstract":"This paper represented an application of fuzzy logic to power quality issue. It describes the sources of harmonics detected, by using fuzzy sets and IF-THEN inferences rules. Harmonics can create unwanted impacts on power systems and to end-users. Electrical utilities, manufactures and customers have been bothered by harmonic distortion problems in power system. The harmonics is based on power quality and according to the IEEE 519-1992. The harmonic signals and spectrum are determined by the application of a fast Fourier transform (FFT). A fuzzy inference system is experimentally implemented for these cases, showing the general procedures of how to use this theory. It appears that fuzzy set theory can play an important rule in diagnosing power quality disturbances, and hence it can offer insights towards the satisfaction of the needs of manufacturers, utilities and customers.","PeriodicalId":136640,"journal":{"name":"Proceedings. National Power Engineering Conference, 2003. PECon 2003.","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126405970","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 : 1900-01-01DOI: 10.1109/PECON.2003.1437438
N. Hamzah, A. Mohamed, A. Hussain
Harmonic contributions at the point of common coupling have become a significant issue in power quality due to the increasing use of power electronic devices. One method to limit the amount of harmonic contribution in a distribution system is by establishing limits such as the IEEE Std. 519 and the IEC 1000-3. Another method is an incentive-based scheme whereby harmonic generators are to be charged an amount commensurate with their harmonic pollution level when the limits are exceeded. This paper presents a study for comparing a new method based on reactive power gradient with other methods from the literature based on real power direction and network theorem in determining the utility and customer harmonic contributions at the point of common coupling. In this study, a 10-bus distribution system is simulated using the electromagnetic transient EMTDC/PSCAD software. Index for each method is calculated using data obtained from the simulations. From the analysis, the reactive power gradient method and the network theorem give reliable results. The reactive power gradient method however is faster and has a good potential to be used for on-line determination of harmonic contributor.
{"title":"Methods for determining utility and customer harmonic contributions at the point of common coupling","authors":"N. Hamzah, A. Mohamed, A. Hussain","doi":"10.1109/PECON.2003.1437438","DOIUrl":"https://doi.org/10.1109/PECON.2003.1437438","url":null,"abstract":"Harmonic contributions at the point of common coupling have become a significant issue in power quality due to the increasing use of power electronic devices. One method to limit the amount of harmonic contribution in a distribution system is by establishing limits such as the IEEE Std. 519 and the IEC 1000-3. Another method is an incentive-based scheme whereby harmonic generators are to be charged an amount commensurate with their harmonic pollution level when the limits are exceeded. This paper presents a study for comparing a new method based on reactive power gradient with other methods from the literature based on real power direction and network theorem in determining the utility and customer harmonic contributions at the point of common coupling. In this study, a 10-bus distribution system is simulated using the electromagnetic transient EMTDC/PSCAD software. Index for each method is calculated using data obtained from the simulations. From the analysis, the reactive power gradient method and the network theorem give reliable results. The reactive power gradient method however is faster and has a good potential to be used for on-line determination of harmonic contributor.","PeriodicalId":136640,"journal":{"name":"Proceedings. National Power Engineering Conference, 2003. PECon 2003.","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130911418","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 : 1900-01-01DOI: 10.1109/PECON.2003.1437413
S. Sahari, A. F. Abidin, T. Rahman
This paper presents the development and an application artificial neural network (ANN) based method for predicting of voltage stability index in power system network. The main feature of this paper is to introduce the approach in developing neural network backpropagation by using C programming and its accuracy in predicting voltage stability index in the power system network. The training developed neural network was accomplished by using real power Pd and reactive power Qd at each load bus as input information, and voltage stability index L information covering stability at each individual load bus as output information. The generalization capability of the developed neural networks under large number of random operation of loading conditions has been tested. Fast performance, accurate evaluation and good prediction for voltage stability index have been obtained. Results of tests conducted on IEEE 6-bus test system are presented and discussed.
{"title":"Development of artificial neural network for voltage stability monitoring","authors":"S. Sahari, A. F. Abidin, T. Rahman","doi":"10.1109/PECON.2003.1437413","DOIUrl":"https://doi.org/10.1109/PECON.2003.1437413","url":null,"abstract":"This paper presents the development and an application artificial neural network (ANN) based method for predicting of voltage stability index in power system network. The main feature of this paper is to introduce the approach in developing neural network backpropagation by using C programming and its accuracy in predicting voltage stability index in the power system network. The training developed neural network was accomplished by using real power Pd and reactive power Qd at each load bus as input information, and voltage stability index L information covering stability at each individual load bus as output information. The generalization capability of the developed neural networks under large number of random operation of loading conditions has been tested. Fast performance, accurate evaluation and good prediction for voltage stability index have been obtained. Results of tests conducted on IEEE 6-bus test system are presented and discussed.","PeriodicalId":136640,"journal":{"name":"Proceedings. National Power Engineering Conference, 2003. PECon 2003.","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128525048","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 : 1900-01-01DOI: 10.1109/PECON.2003.1437412
B. Rahimullah, E. Ramlan, T. Rahman
The problem or economic dispatch has been forwarded and solved by numerous methods. This paper provides alternative methods to solve the problem. In this paper, evolutionary programming (EP) is used as one of the techniques to solve the problem of economic dispatch in power system. Log-normal Gaussian mutation or commonly known as metaEP, is used as the essential operator of generating the sufficient power in order to fulfill demand at a minimum cost. The proposed EP method provides a solution consisting suitable power generated of each generator and meeting the demand with minimum total cost. The study also investigates the differences of using standard EP against metaEP to solve the same problem. The comparisons between the both methods and GA solution to solve the problems are also highlighted in this paper. The study findings show that both EP methods perform better compared to GA in solving the economic dispatch problem. However, metaEP seems to be more robust in solving problems in a bigger search space compared to the original EP. The study conducted for the comparison is based on the solution and performance of each algorithm in solving the problem.
{"title":"Evolutionary approach for solving economic dispatch in power system","authors":"B. Rahimullah, E. Ramlan, T. Rahman","doi":"10.1109/PECON.2003.1437412","DOIUrl":"https://doi.org/10.1109/PECON.2003.1437412","url":null,"abstract":"The problem or economic dispatch has been forwarded and solved by numerous methods. This paper provides alternative methods to solve the problem. In this paper, evolutionary programming (EP) is used as one of the techniques to solve the problem of economic dispatch in power system. Log-normal Gaussian mutation or commonly known as metaEP, is used as the essential operator of generating the sufficient power in order to fulfill demand at a minimum cost. The proposed EP method provides a solution consisting suitable power generated of each generator and meeting the demand with minimum total cost. The study also investigates the differences of using standard EP against metaEP to solve the same problem. The comparisons between the both methods and GA solution to solve the problems are also highlighted in this paper. The study findings show that both EP methods perform better compared to GA in solving the economic dispatch problem. However, metaEP seems to be more robust in solving problems in a bigger search space compared to the original EP. The study conducted for the comparison is based on the solution and performance of each algorithm in solving the problem.","PeriodicalId":136640,"journal":{"name":"Proceedings. National Power Engineering Conference, 2003. PECon 2003.","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123107890","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 : 1900-01-01DOI: 10.1109/PECON.2003.1437444
I. Musirin, T. Rahman
Maximum loadability is an important property to determine the point of voltage collapse in a power system. This can be done by conducting the voltage stability analysis (VSA) considering the variation in reactive power loading until a point closed the voltage stability limit is met. Nevertheless, the VSA technique is time consuming since gradual increase in reactive power loading has to be conducted with empirical process. This paper presents the evolutionary programming (EP) based optimization technique for estimating maximum loadability in electric power system. A predeveloped line-based voltage stability index was utilized as the fitness in the objective function, which has to be maximized for estimating the maximum loadability. Tests were conducted on IEEE Reliability Test System (RTS) and comparative studies were performed by comparing the results obtained from the VSA technique. Results from the study revealed that the proposed EP technique outperformed the VSA technique in terms of computation time, robustness and accuracy.
{"title":"Evolutionary programming based optimization technique for maximum loadability estimation in electric power system","authors":"I. Musirin, T. Rahman","doi":"10.1109/PECON.2003.1437444","DOIUrl":"https://doi.org/10.1109/PECON.2003.1437444","url":null,"abstract":"Maximum loadability is an important property to determine the point of voltage collapse in a power system. This can be done by conducting the voltage stability analysis (VSA) considering the variation in reactive power loading until a point closed the voltage stability limit is met. Nevertheless, the VSA technique is time consuming since gradual increase in reactive power loading has to be conducted with empirical process. This paper presents the evolutionary programming (EP) based optimization technique for estimating maximum loadability in electric power system. A predeveloped line-based voltage stability index was utilized as the fitness in the objective function, which has to be maximized for estimating the maximum loadability. Tests were conducted on IEEE Reliability Test System (RTS) and comparative studies were performed by comparing the results obtained from the VSA technique. Results from the study revealed that the proposed EP technique outperformed the VSA technique in terms of computation time, robustness and accuracy.","PeriodicalId":136640,"journal":{"name":"Proceedings. National Power Engineering Conference, 2003. PECon 2003.","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117300898","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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