{"title":"Optimal placement of phasor measurement units: A literature review","authors":"N. Manousakis, G. Korres, P. Georgilakis","doi":"10.1109/ISAP.2011.6082183","DOIUrl":"https://doi.org/10.1109/ISAP.2011.6082183","url":null,"abstract":"The increasing availability of phasor measurement units (PMUs) at substations enables the synchronized measurements to various applications, such as the monitoring of system state under normal operations or the protection and control of power systems during abnormal operation. The objective of the optimal PMU placement (OPP) problem is to determine a minimal set of PMUs such that the whole system is observable. To solve the OPP problem, mathematical programming, heuristic, and meta-heuristic optimization techniques, have been proposed. This paper provides a comprehensive literature review on the OPP problem and the solution methodologies. Due to the vast number of publications in this field, the most representative papers are reviewed.","PeriodicalId":424662,"journal":{"name":"2011 16th International Conference on Intelligent System Applications to Power Systems","volume":"79 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-11-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131800434","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}
M. K. Bourdoulis, John G. Spanomichos, A. Alexandridis
{"title":"Model analysis and intelligent-ANFIS control design for PWM-regulated ac/dc converters","authors":"M. K. Bourdoulis, John G. Spanomichos, A. Alexandridis","doi":"10.1109/ISAP.2011.6082255","DOIUrl":"https://doi.org/10.1109/ISAP.2011.6082255","url":null,"abstract":"A new design approach for nonlinear intelligent controllers for PWM-regulated ac/dc converters is proposed. First, the nonlinear model of the complete system is obtained, on which a passivity based analysis is conducted. Using this model, it is proven that the system always has the damping property independently from the controller scheme that one can apply. This is a significant contribution for fuzzy logic based intelligent control applications since it makes possible to overcome the inherent drawback of these designs, that is the ability to guarantee stability of the closed loop system. Thus, nonlinear adaptive neuro-fuzzy inference system (ANFIS) controllers are proposed to be used in order to obtain flexible, fast and efficient regulation of PWM-regulated ac/dc converters. The performance of the proposed ANFIS based controllers is simulated on a test system. The transient response of the proposed ANFIS controllers indicates an excellent performance which seems to enhance that of the conventional PI controllers.","PeriodicalId":424662,"journal":{"name":"2011 16th International Conference on Intelligent System Applications to Power Systems","volume":"58 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-11-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126921742","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":"Autonomous neural models applied to medium-term water inflow forecasting","authors":"V. H. Ferreira, C.M. Leocadio","doi":"10.1109/ISAP.2011.6082236","DOIUrl":"https://doi.org/10.1109/ISAP.2011.6082236","url":null,"abstract":"In the Brazilian National Interconnected System (NIS), the hydro plants make up the most of the generating park, being of great importance to study the behavior of future inflows to the energy operation planning. Due to the cyclic characteristic of wet and dry periods in Brazil, the behavior of the water inflow time-series is non-stationary, thereby hampering the direct use of classical models of time series analysis. The large number of water inflow time-series to be analyzed jeopardizes the individual treatment of each series by a specialist. The use of artificial neural networks (ANN) allows direct modeling aspects of seasonal and non-linear series of water inflows, but requires specialist intervention to specify the modes, i.e., input selection, structure definition and complexity control. This paper presents autonomous neural models for forecasting monthly water inflows. Chaos Theory is used for initial input space representation, with automatic clustering techniques been applied for autonomous identification of regions of the reconstructed attractor to be modeled. For the modeling task, Bayesian Inference applied to multilayer perceptrons (BIAMLPs) training and specification is used. The models are compared against another ANN proposals and classical models.","PeriodicalId":424662,"journal":{"name":"2011 16th International Conference on Intelligent System Applications to Power Systems","volume":"30 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-11-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125814362","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}
D. Pylarinos, K. Siderakis, E. Thalassinakis, I. Vitellas, E. Pyrgioti
{"title":"Recording and managing field leakage current waveforms in crete","authors":"D. Pylarinos, K. Siderakis, E. Thalassinakis, I. Vitellas, E. Pyrgioti","doi":"10.1109/ISAP.2011.6082221","DOIUrl":"https://doi.org/10.1109/ISAP.2011.6082221","url":null,"abstract":"The Greek Public Power Corporation (PPC) has issued a large project to battle marine pollution in the island of Crete, where its impact is rather severe due to coastal development. As a part of this project, specially designed leakage current (LC) measuring systems have been installed in order to monitor electrical activity on HV insulators and insulators' overall performance. Recently an insulator test station has been constructed. LC monitoring is commonly used to monitor and investigate the performance of insulators since the shape of LC waveforms is strongly correlated with surface activity. Field measurements are most suitable since they offer an exact view of actual activity and performance in the field. In this paper, the obtained experience in field LC monitoring is investigated focused on monitoring and managing LC waveforms. A review of the installation, measurements, developed software and signal processing techniques and results are presented.","PeriodicalId":424662,"journal":{"name":"2011 16th International Conference on Intelligent System Applications to Power Systems","volume":"36 8 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-11-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125174317","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}
Ahmed F. Shosha, P. Gladyshev, Shinn-Shyan Wu, Chen-Ching Liu
{"title":"Detecting cyber intrusions in SCADA networks using multi-agent collaboration","authors":"Ahmed F. Shosha, P. Gladyshev, Shinn-Shyan Wu, Chen-Ching Liu","doi":"10.1109/ISAP.2011.6082170","DOIUrl":"https://doi.org/10.1109/ISAP.2011.6082170","url":null,"abstract":"Current SCADA (Supervisory Control and Data Acquisition) system architecture increases the interconnectivity to/from other distributed networks and services. In addition, within the SCADA networks there are different types of sub-networks and protocols that are used to monitor and control industrial operations. This complex expansion increases the productivity of SCADA networks; however, it also increases security risks and threats. The state-of-the-art Intrusion Detection Systems (IDSs) are not capable enough of detecting anomalies and intrusions that may be aimed to disrupt the SCADA operations. This paper proposes a Distributed Intrusion Detection System (DIDS) based on a community collaboration between multiple agents of anomaly detectors to identify anomaly behaviors in SCADA networks. The proposed architecture for DIDS incorporates the SCADA network topology and connectivity constraints. In this paper, detailed architecture, components, and functions of DIDS are described and attack scenarios are developed to validate the effectiveness of the proposed methodology","PeriodicalId":424662,"journal":{"name":"2011 16th International Conference on Intelligent System Applications to Power Systems","volume":"57 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-11-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129227414","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}
Chao-Rong Chen, Wenta Tsai, Ching-Yin Lee, Zhenrong Lin
{"title":"SPS generator tripping planning using immune algorithm","authors":"Chao-Rong Chen, Wenta Tsai, Ching-Yin Lee, Zhenrong Lin","doi":"10.1109/ISAP.2011.6082179","DOIUrl":"https://doi.org/10.1109/ISAP.2011.6082179","url":null,"abstract":"This study describes the optimal generator tripping planning for special protection system (SPS) in an independent power system. This SPS is dealing with the transient instability caused by transmission line N-3 contingencies. The immune algorithm is adopted to select the tripping generators in order to keep power system stable. Taiwan power system is the base power flow case for simulation. The optimization result is verified with PSS/E and PEALS programs. The verification shows the optimal generator tripping selection in this SPS. The proposed algorithm provides a valuable reference in the development of an SPS for similar independent power systems.","PeriodicalId":424662,"journal":{"name":"2011 16th International Conference on Intelligent System Applications to Power Systems","volume":"12 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-11-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121009968","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":"Genetic algorithms for the capacitor placement problem in distribution networks","authors":"L. Vargas, G. Jiménez‐Estévez","doi":"10.1109/ISAP.2011.6082187","DOIUrl":"https://doi.org/10.1109/ISAP.2011.6082187","url":null,"abstract":"Capacitor sizing and placement problem is an important task for planning studies in distribution networks. This task impacts on voltage regulation as well as the loadability of lines, which are key elements for modern distribution companies. However, the capacitor placement problem usually leads to a combinatorial optimization problem classified as a NP-hard. Because of its complexity, different models based on heuristic strategies have been proposed to solve this problem. In this work, an evolutionary strategy -as a global search methodology- is proposed. The corresponding capacitor placement problem is formulated as a second stage of the solution for the distribution planning problem when the planner deals with large distribution systems. This stage defines the placement and dimension of the required capacitor banks to reduce both losses and voltage drop. Final results are presented for a 4083 nodes system.","PeriodicalId":424662,"journal":{"name":"2011 16th International Conference on Intelligent System Applications to Power Systems","volume":"290 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-11-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131679217","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":"Fault tolerant control for gas turbines","authors":"M. Sánchez-Parra, D. A. Suarez, C. Verde","doi":"10.1109/ISAP.2011.6082247","DOIUrl":"https://doi.org/10.1109/ISAP.2011.6082247","url":null,"abstract":"This paper proposes a fault active tolerant control switching scheme with a PID's set and switching functions to manage the faults conditions. The family of PIDs which stabilizes the model in each fault condition is off-line computed following a procedure based on the signature of the closed loop rational function. To guarantee the closed loop stability between switching and reduce the number of PID's sets in the scheme a switching logic function for the controllers is selected using the LMI theory. The scheme is applied to the case of critical faults of a gas turbo generator of an electric plant, assuming the existence of a fault reconstruction system and known the multiple frequency responses of the gas turbine with four fault conditions. The comparison of a classic controller and the new scheme is shown by simulation results using real parameter of a Mexican electric plant.","PeriodicalId":424662,"journal":{"name":"2011 16th International Conference on Intelligent System Applications to Power Systems","volume":"51 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-11-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131293991","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}
A. R. Oliveira, P. Garcia, L. Oliveira, J. Pereira, H. A. Silva
{"title":"Distribution system to fault classification using negative sequence and intelligent system","authors":"A. R. Oliveira, P. Garcia, L. Oliveira, J. Pereira, H. A. Silva","doi":"10.1109/ISAP.2011.6082174","DOIUrl":"https://doi.org/10.1109/ISAP.2011.6082174","url":null,"abstract":"This paper presents a new fault classification scheme for electrical distribution networks using a negative sequence factor (F2) and artificial neural networks. The main objective is to develop a novel methodology to block the reclosers to avoid accidents with energized cables lying to ground. The proposed algorithm is able to identify the following fault types: shunt, series and simultaneous shunt-series with the line cable lying either on the side of the source or load. In order to check the effectiveness of the proposed methodology the 13 bus distribution test system was used.","PeriodicalId":424662,"journal":{"name":"2011 16th International Conference on Intelligent System Applications to Power Systems","volume":"66 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-11-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130665078","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":"Demand response programs definition supported by clustering and classification techniques","authors":"S. Ramos, H. Morais, Z. Vale, P. Faria, J. Soares","doi":"10.1109/ISAP.2011.6082185","DOIUrl":"https://doi.org/10.1109/ISAP.2011.6082185","url":null,"abstract":"The growing importance and influence of new resources connected to the power systems has caused many changes in their operation. Environmental policies and several well know advantages have been made renewable based energy resources largely disseminated. These resources, including Distributed Generation (DG), are being connected to lower voltage levels where Demand Response (DR) must be considered too. These changes increase the complexity of the system operation due to both new operational constraints and amounts of data to be processed. Virtual Power Players (VPP) are entities able to manage these resources.","PeriodicalId":424662,"journal":{"name":"2011 16th International Conference on Intelligent System Applications to Power Systems","volume":"3 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-11-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126489105","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}