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Approximate dynamic programming-based control of a building cooling system with thermal storage 基于近似动态规划的建筑蓄热制冷系统控制
IEEE PES ISGT Europe 2013 Pub Date : 2013-10-01 DOI: 10.1109/ISGTEurope.2013.6695463
Francesco Borghesan, R. Vignali, L. Piroddi, M. Prandini, Martin Strelec
{"title":"Approximate dynamic programming-based control of a building cooling system with thermal storage","authors":"Francesco Borghesan, R. Vignali, L. Piroddi, M. Prandini, Martin Strelec","doi":"10.1109/ISGTEurope.2013.6695463","DOIUrl":"https://doi.org/10.1109/ISGTEurope.2013.6695463","url":null,"abstract":"The paper addresses the energy management of a building cooling system comprising a chiller plant with two chillers, a thermal storage unit, and a cooling load representing a building. Uncertainty affects the system since the cooling load depends on the building occupancy. The goal is to minimize the energy consumption of the cooling system, while preserving comfort in the building. This is achieved by optimally distributing the cooling load demand among the chillers and the thermal storage unit, and modulating the building temperature set-point to some (limited) extent. The problem can be decomposed into a static optimization problem, and a dynamic programming problem, which is solved based on the abstraction to a Markov chain of the stochastic hybrid system modeling the cooling system.","PeriodicalId":307118,"journal":{"name":"IEEE PES ISGT Europe 2013","volume":"73 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122605231","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}
引用次数: 27
Feature selection in power transformer fault diagnosis based on dissolved gas analysis 基于溶解气体分析的电力变压器故障诊断特征选择
IEEE PES ISGT Europe 2013 Pub Date : 2013-10-01 DOI: 10.1109/ISGTEurope.2013.6695396
F. D. Samirmi, Wenhu Tang, Q. Wu
{"title":"Feature selection in power transformer fault diagnosis based on dissolved gas analysis","authors":"F. D. Samirmi, Wenhu Tang, Q. Wu","doi":"10.1109/ISGTEurope.2013.6695396","DOIUrl":"https://doi.org/10.1109/ISGTEurope.2013.6695396","url":null,"abstract":"Dissolved gas analysis is an important test to diagnose the condition of a power transformer. Based on key gases, various features are recommended for the purpose of fault classification. A feature selection method can be used to reduce the number of features by excluding less useful or irrelevant features. Selecting useful features not only reduces the computational complexity, but also enhances the classification performance. The novelty of this paper is to use various techniques of feature selection, including Student's t-test, Kolmogorov-Smirnov test and Kullback Leibler Divergence test, to rank features' order based on discriminative power of different features. The ordered features are tested with the K-Nearest Neighbour classification algorithm to evaluate their importance based on fault classification accuracy.","PeriodicalId":307118,"journal":{"name":"IEEE PES ISGT Europe 2013","volume":"6 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124231409","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}
引用次数: 8
Development and demonstration of power management of hybrid energy storage for PV integration 光伏一体化混合储能电源管理的开发与示范
IEEE PES ISGT Europe 2013 Pub Date : 2013-10-01 DOI: 10.1109/ISGTEurope.2013.6695470
Y. Ye, P. Garg, Ratnesh K. Sharma
{"title":"Development and demonstration of power management of hybrid energy storage for PV integration","authors":"Y. Ye, P. Garg, Ratnesh K. Sharma","doi":"10.1109/ISGTEurope.2013.6695470","DOIUrl":"https://doi.org/10.1109/ISGTEurope.2013.6695470","url":null,"abstract":"The integration of hybrid energy storage system (ESS) with PV has been considered an effective solution to counteract its variable power generation. This paper proposes an on-line power management system of the hybrid Ultracapacitor-Battery ESS for PV power smoothing. The two-layer control framework with multi-rate operation mechanism is designed to coordinate the power sharing among these two energy storage elements dynamically based on the system status, the components' energy status, and their dynamic characteristics, etc. The simulation studies are performed to demonstrate the effectiveness and advantages of the proposed control method by Matlab/Simulink. A small-scale experimental testbed is set-up and the control structure is implemented on-line to validate its effectiveness.","PeriodicalId":307118,"journal":{"name":"IEEE PES ISGT Europe 2013","volume":"112 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128004256","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}
引用次数: 11
Integrated state estimation and load modelling for distribution grids with ampere measurements 带安培测量的配电网综合状态估计与负荷建模
IEEE PES ISGT Europe 2013 Pub Date : 2013-10-01 DOI: 10.1109/ISGTEurope.2013.6695261
F. Fusco, M. Sinn
{"title":"Integrated state estimation and load modelling for distribution grids with ampere measurements","authors":"F. Fusco, M. Sinn","doi":"10.1109/ISGTEurope.2013.6695261","DOIUrl":"https://doi.org/10.1109/ISGTEurope.2013.6695261","url":null,"abstract":"State estimation is essential for a smarter monitoring and control of distribution power networks, but need to rely largely on current magnitude measurements, which causes non-uniqueness of the solution. Constraining the problem based on prior knowledge of the sign of the injections, as previously proposed, requires more complex estimators, does not always ensure uniqueness and prevents anomaly detection in the case of wrong prior assumptions. By including also prior knowledge of the magnitudes of the injections, coming from statistical load modelling, we show how it is possible to resort to conventional state estimators while achieving an increased reliability of the solution as well as the ability to detect/correct wrong prior models, using classical bad data analysis.","PeriodicalId":307118,"journal":{"name":"IEEE PES ISGT Europe 2013","volume":"55 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121455738","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}
引用次数: 2
Automatic triggering of the interconnection between Mexico and central America using discrete control schemes 使用离散控制方案自动触发墨西哥和中美洲之间的互连
IEEE PES ISGT Europe 2013 Pub Date : 2013-10-01 DOI: 10.1109/ISGTEurope.2013.6695333
E. Martinez, L. Vanfretti, F. R. S. Sevilla
{"title":"Automatic triggering of the interconnection between Mexico and central America using discrete control schemes","authors":"E. Martinez, L. Vanfretti, F. R. S. Sevilla","doi":"10.1109/ISGTEurope.2013.6695333","DOIUrl":"https://doi.org/10.1109/ISGTEurope.2013.6695333","url":null,"abstract":"In the current energy exchange market it is essential to guarantee continuity and quality of supply both in steady state and during contingencies that might occur in any subsystem of interconnected systems. In this work it is shown how the geographical and topological characteristics of the subnetworks directly affect the quality and reliability in the energy exchange, especially when subsystems are interconnected without asynchronous ties that prevent power, frequency or voltage oscillations. This paper describes the problems faced by the interconnection between Mexico and the countries that define the Interconnected Electric System of the Central American Countries (SIEPAC). Different oscillations that have occurred are analyzed. Discrete control schemes to automatically trigger the 400 KV circuit that interconnects the systems of Mexico and Guatemala are proposed.","PeriodicalId":307118,"journal":{"name":"IEEE PES ISGT Europe 2013","volume":"1951 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129170204","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}
引用次数: 4
Contribution of a smart transformer in the local primary control of a microgrid 智能变压器在微电网局部初级控制中的贡献
IEEE PES ISGT Europe 2013 Pub Date : 2013-10-01 DOI: 10.1109/ISGTEurope.2013.6695239
T. Vandoorn, W. Willems, J. D. Kooning, J. V. D. Vyver, L. Vandevelde
{"title":"Contribution of a smart transformer in the local primary control of a microgrid","authors":"T. Vandoorn, W. Willems, J. D. Kooning, J. V. D. Vyver, L. Vandevelde","doi":"10.1109/ISGTEurope.2013.6695239","DOIUrl":"https://doi.org/10.1109/ISGTEurope.2013.6695239","url":null,"abstract":"In order to enable an easy participation of microgrids in the electricity markets, the smart transformer (ST) concept has been developed. The ST controls the power exchange between a microgrid and the utility network by only controlling its microgrid side voltage, instead of the conventional arrangement where new set points are communicated to all microgrid elements. When the voltage-based droop (VBD) control is implemented in the DG units, loads and storage elements, all microgrid units automatically respond to this change of microgrid voltage by altering their power output or consumption. However, this reference value of power exchange is dependent on (day-ahead) predictions of both consumption and (renewable) power generation. Hence, when these predictions prove to be inaccurate, the ST will still control the power exchange, but with consequently large variations of the microgrid voltage from its nominal value. It is suggested to take the real-time microgrid voltage into account when determining the reference power of the ST. This is presented in this paper by extending the ST's control strategy with a VBD control, such that the ST can contribute in the primary control. Simulations are included to analyze this primary control of the ST combined with VBD control of the other microgrid elements.","PeriodicalId":307118,"journal":{"name":"IEEE PES ISGT Europe 2013","volume":"22 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116914526","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}
引用次数: 2
Multi-resolution load curve representation with privacy-preserving aggregation 具有隐私保护聚合的多分辨率负载曲线表示
IEEE PES ISGT Europe 2013 Pub Date : 2013-10-01 DOI: 10.1109/ISGTEurope.2013.6695231
D. Engel, Günther Eibl
{"title":"Multi-resolution load curve representation with privacy-preserving aggregation","authors":"D. Engel, Günther Eibl","doi":"10.1109/ISGTEurope.2013.6695231","DOIUrl":"https://doi.org/10.1109/ISGTEurope.2013.6695231","url":null,"abstract":"The availability of individual load curves per household in the smart grid end-user domain combined with nonintrusive load monitoring to infer personal data from these load curves has led to privacy concerns. Two types of approaches show high potential to resolve this issue: (i) secure aggregation and (ii) multi-resolution representation with conditional access. In this paper a combination of these two principle approaches is proposed. It is shown formally that secure aggregation and wavelet-based multi-resolution representation are compatible. Furthermore, it is shown that that the wavelet transformation is compatible with existing privacy-preserving protocols and can be used to extend them with additional degrees of freedom. An implementation of the proposed approach is used for evaluation of feasibility in a low-cost embedded environment.","PeriodicalId":307118,"journal":{"name":"IEEE PES ISGT Europe 2013","volume":"287 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114146389","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}
引用次数: 17
Online load forecasting for supermarket refrigeration 超市制冷负荷在线预测
IEEE PES ISGT Europe 2013 Pub Date : 2013-10-01 DOI: 10.1109/ISGTEurope.2013.6695467
P. Bacher, H. Madsen, H. A. Nielsen
{"title":"Online load forecasting for supermarket refrigeration","authors":"P. Bacher, H. Madsen, H. A. Nielsen","doi":"10.1109/ISGTEurope.2013.6695467","DOIUrl":"https://doi.org/10.1109/ISGTEurope.2013.6695467","url":null,"abstract":"This paper presents a study of models for forecasting the load for supermarket refrigeration. The data used for building the forecasting models consists of load measurements, local climate measurements and weather forecasts. The load measurements are from a supermarket located in a village in Denmark. Every hour the hourly load for refrigeration for the following 42 hours is forecasted. The forecast models are time adaptive linear time-series models. The dynamic relations between the inputs and the load is modeled by simple transfer functions. The system operates in two regimes: one in the closing hours during night and one in the opening hours during the day. This is modeled by a regime switching model in which some of the coefficients in the model depends on the regime. The results show that the one-step ahead residuals are close to white noise, however it is found that some non-linear dependence on the ambient temperature should be included in the model in further work.","PeriodicalId":307118,"journal":{"name":"IEEE PES ISGT Europe 2013","volume":"21 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114373948","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}
引用次数: 1
Coordinating smart homes in microgrids: A quantification of benefits 协调微电网中的智能家居:效益的量化
IEEE PES ISGT Europe 2013 Pub Date : 2013-10-01 DOI: 10.1109/ISGTEurope.2013.6695357
M. Huber, Florian Sanger, T. Hamacher
{"title":"Coordinating smart homes in microgrids: A quantification of benefits","authors":"M. Huber, Florian Sanger, T. Hamacher","doi":"10.1109/ISGTEurope.2013.6695357","DOIUrl":"https://doi.org/10.1109/ISGTEurope.2013.6695357","url":null,"abstract":"A growing number of households are seeking energy autonomy and economic benefits by installing micro-CHP and PV generators, as well as battery storage units in their so-called smart homes. An option to further increase benefits, is to install a community microgrid and coordinate smart homes intelligently. To quantify this increase, we apply numerical simulations using real-world data for household loads in a temporal resolution of 15-minutes. In systems consisting of CHP-units, the degree of electricity autonomy rises from 50% to 80% through installing a microgrid, allowing lucrative CHP operation. In PV-based systems, the benefits are fewer and if battery storage is installed additionally, they almost disappear completely. As a consequence, intelligently managed microgrids are as valuable option for the integration of microgeneration as long as decentralized battery storage is not profitable and thus not employed.","PeriodicalId":307118,"journal":{"name":"IEEE PES ISGT Europe 2013","volume":"129 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114782230","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}
引用次数: 27
Analysis on the effects of STATCOM on CSG based on RTDS 基于RTDS的STATCOM对CSG的影响分析
IEEE PES ISGT Europe 2013 Pub Date : 2013-10-01 DOI: 10.1109/ISGTEurope.2013.6695489
Yunwen Guo, Jianshe Zhang, Yun Hu, Weiqiang Han, K. Ou, G. Jackson, Yi Zhang
{"title":"Analysis on the effects of STATCOM on CSG based on RTDS","authors":"Yunwen Guo, Jianshe Zhang, Yun Hu, Weiqiang Han, K. Ou, G. Jackson, Yi Zhang","doi":"10.1109/ISGTEurope.2013.6695489","DOIUrl":"https://doi.org/10.1109/ISGTEurope.2013.6695489","url":null,"abstract":"In 2013, CSG installed three ± 200Mvar STATCOMs on the 500kV substations which are adjacent to the receiving ends of multiple HVDC lines. This paper describes a test bed based on the RTDS Simulator that was developed to analyze the impacts of installing these STATCOMs. The impacts of the STATCOMs on voltage recovery and (U) HVDC fault recovery were investigated. The study shows the use of multiple STATCOMs can lead to an improvement in the voltage recovery capability at the inverter station, reduce the occurrence of commutation failures for some faults and improve HVDC power recovery. For some contingencies such as a circuit breaker failure, the improvements were significant. Meanwhile, for other contingencies of long time faults such as commutation failures caused by circuit breaker failure, the STATCOMs had negligible benefit.","PeriodicalId":307118,"journal":{"name":"IEEE PES ISGT Europe 2013","volume":"75 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127377004","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}
引用次数: 5
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