T. Schlosser, Sebastian Stinner, A. Monti, D. Müller
{"title":"Analyzing the impact of home energy systems on the electrical grid","authors":"T. Schlosser, Sebastian Stinner, A. Monti, D. Müller","doi":"10.1109/PSCC.2014.7038378","DOIUrl":"https://doi.org/10.1109/PSCC.2014.7038378","url":null,"abstract":"This paper shows an approach to analyze the behavior of the electrical low-voltage grid. Here, the focus lies on home energy systems acting as heat supplier for buildings and photovoltaic systems as domestic electrical energy sources. Electrical quantities of the grid like voltage, load flow through the distribution transformer, grid losses and the utilization of the cables are analyzed in a case study. This case study includes two scenarios. The first one is built up with an actual penetration of distributed systems and the second (generic) one includes higher shares of these systems. As a result so far, we cannot find any violation of critical values in the considered test cases.","PeriodicalId":155801,"journal":{"name":"2014 Power Systems Computation Conference","volume":"174 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114934634","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":"DYMONDS computer platform for smart grids","authors":"M. Ilić","doi":"10.1109/PSCC.2014.7038476","DOIUrl":"https://doi.org/10.1109/PSCC.2014.7038476","url":null,"abstract":"In this paper we propose an actor-oriented computer platform, which is a natural outgrowth of our Dynamic Monitoring and Decision Systems (DYMONDS) modeling, communications and control paradigm for smart grids. We summarize this approach which is physics-based and explain how its actor-oriented structure can support a possible multi-level computer platform. By combining principles of model-based Ptolemy II computer platform with these models, we sketch out the basis for implementing a DYMONDS-based computer platform for smart grids. Both the dynamic internal models of polymorphic actors, as well as the system model of computing and communication protocols relating their external interfaces are described. Perhaps, most important is the fact that the proposed computer platform can evolve dynamically as operating conditions and status of actors vary, and, longer-term, as different components are added to the physical system and different smarts are being embedded, rather than having to re-program every time as the physical system changes; this is because new semantics are introduced at the component interaction level rather than at the programming language level.","PeriodicalId":155801,"journal":{"name":"2014 Power Systems Computation Conference","volume":"27 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116644057","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}
Claude-Alexandra Fezeu, K. Bell, Jiansong Ding, P. Panciatici, Marie-Sophie Debry
{"title":"Simplified representation of a large transmission network for use in long-term expansion planning","authors":"Claude-Alexandra Fezeu, K. Bell, Jiansong Ding, P. Panciatici, Marie-Sophie Debry","doi":"10.1109/PSCC.2014.7038298","DOIUrl":"https://doi.org/10.1109/PSCC.2014.7038298","url":null,"abstract":"This paper concerns the development of a new approach to the simplification of representation of the spatial dimension of a large transmission network in order that the influences on bulk power transfers can be assessed in a practical way and the main routes that should be reinforced readily identified. The main challenge is to achieve a satisfactory clustering to deliver a number of zones that is small enough to make subsequent analysis of the expansion panning problem manageable but not so small as to neglect key regions of the original system. Two particular methods that have previously been proposed are described: a K-means algorithm and Dodu's mixed integer linear programming based approach. Each of them has some disadvantages, in particular that a direct interface between two zones might be derived that has no equivalent on the real network; or that it is difficult to control the number of zones. Hence, this paper describes a new hybrid method that ensures that resulting zonal delineations make engineering sense from the point of view of physical connections and allow some control over the number of zones. Results are presented in respect of the transmission network in Great Britain. Applications of the simplified network are discussed, not only in long-term planning but also in respect of the potential for use in transmission charging.","PeriodicalId":155801,"journal":{"name":"2014 Power Systems Computation Conference","volume":"18 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134476856","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}
P. T. Baboli, M. P. Moghaddam, M. Haghifam, M. Shafie‐khah, J. Catalão
{"title":"Serving flexible reliability in hybrid AC-DC microgrid using demand response and renewable energy resources","authors":"P. T. Baboli, M. P. Moghaddam, M. Haghifam, M. Shafie‐khah, J. Catalão","doi":"10.1109/PSCC.2014.7038441","DOIUrl":"https://doi.org/10.1109/PSCC.2014.7038441","url":null,"abstract":"In this paper, a new concept of serving flexible reliability (FR) is introduced in distribution network level. FR is defined as the ability of a grid to continue servicing the high priority customers in contingency states. Customers' priority is recognized based on their value of service reliability. Regarding this matter, the philosophy of designing a hybrid AC-DC microgrid is introduced with the ability of offering an alternative resource for each individual customer in contingency states. The analytical modeling of FR analysis besides the overall reliability analysis is proposed, and the new FR index of expected energy retrieved (EER) is introduced. The performance of the proposed hybrid microgrid in serving FR is demonstrated through a numerical study on modified distribution network for Bus-4 of Roy Billinton Test System (RBTS).","PeriodicalId":155801,"journal":{"name":"2014 Power Systems Computation Conference","volume":"81 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132919130","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":"Contracting strategies for generation companies with ambiguity aversion on spot price distribution","authors":"Bruno Fanzeres, A. Street, L. Barroso","doi":"10.1109/PSCC.2014.7038448","DOIUrl":"https://doi.org/10.1109/PSCC.2014.7038448","url":null,"abstract":"Energy spot price is characterized by its high volatility and difficult prediction, representing a major risk for energy companies, especially those that rely on renewable generation. The typical approach employed by such companies to address their mid- and long-term optimal contracting strategy is to simulate a large set of paths for the uncertainty factors to characterize the probability distribution of the future income and, then, optimize the company portfolio to maximize its certainty equivalent. In practice, however, spot price modeling and simulation is a big challenge for agents due to its high dependence on parameters that are difficult to predict, e.g., GDP growth, demand variation, entrance of new market players, regulatory changes, just to name a few. Under this framework, decisions are made under ambiguity, which happens whenever the decision maker is aware that a given set of scenarios and probabilities represent only an approximation of the true underlying distribution. In this work, robust optimization is used to account for ambiguity aversion in the optimal contracting strategy of renewable generation companies. A case study with data from the Brazilian system is shown to illustrate the applicability of the proposed methodology.","PeriodicalId":155801,"journal":{"name":"2014 Power Systems Computation Conference","volume":"19 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133236750","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
C. Bovo, Luca Radaelli, A. Berizzi, A. Mansoldo, M. Norton
{"title":"A thorough comparison among impact of different technologies on power system reactive planning","authors":"C. Bovo, Luca Radaelli, A. Berizzi, A. Mansoldo, M. Norton","doi":"10.1109/PSCC.2014.7038300","DOIUrl":"https://doi.org/10.1109/PSCC.2014.7038300","url":null,"abstract":"The Irish transmission network is quickly changing its basic features from many points of view, and the consequent potential scenarios increase uncertainty in planning future network. In particular, the importance of wind power generation has risen in the last years so much as to be considered among the most important and affordable Renewable Energy Sources (RES), with a growing rate faster than other technologies. This requires new criteria to set out the appropriate architecture for future grids, in terms of topology, technology and control structures. This paper describes how to use a var planning methodology to identify reactive needs for future mixed meshed AC/DC system, taking into account different transmission technologies.","PeriodicalId":155801,"journal":{"name":"2014 Power Systems Computation Conference","volume":"13 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132073916","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":"Probabilistic assessment of the impact of distributed generation and non-linear load on harmonic propagation in power networks","authors":"Sami Abdelrahman, H. Liao, Jia Yu, J. Milanović","doi":"10.1109/PSCC.2014.7038371","DOIUrl":"https://doi.org/10.1109/PSCC.2014.7038371","url":null,"abstract":"The paper investigates the uncertainties involved in the assessment of annual harmonic performance of a distribution network with distributed generation and non-liner loads. Considering a random variable locations and injections of harmonic sources, both generation and load, a probabilistic assessment of harmonic propagation through the network is performed. The influence of variable and diverse distributed generation in particular is clearly documented.","PeriodicalId":155801,"journal":{"name":"2014 Power Systems Computation Conference","volume":"1950 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129145763","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}
R. Bessa, A. Trindade, A. Monteiro, Vladimiro Miranda, Cátia S. P. Silva
{"title":"Solar power forecasting in smart grids using distributed information","authors":"R. Bessa, A. Trindade, A. Monteiro, Vladimiro Miranda, Cátia S. P. Silva","doi":"10.1109/PSCC.2014.7038462","DOIUrl":"https://doi.org/10.1109/PSCC.2014.7038462","url":null,"abstract":"The growing penetration of solar power technology at low voltage (LV) level introduces new challenges in the distribution grid operation. Across the world, Distribution System Operators (DSO) are implementing the Smart Grid concept and one key function, in this new paradigm, is solar power forecasting. This paper presents a new forecasting framework, based on vector autoregression theory, that combines spatial-temporal data collected by smart meters and distribution transformer controllers to produce six-hour-ahead forecasts at the residential solar photovoltaic (PV) and secondary substation (i.e., MV/LV substation) levels. This framework has been tested for 44 micro-generation units and 10 secondary substations from the Smart Grid pilot in Évora, Portugal (one demonstration site of the EU Project SuSTAINABLE). A comparison was made with the well-known Autoregressive forecasting Model (AR-univariate model) leading to an improvement between 8% and 12% for the first 3 lead-times.","PeriodicalId":155801,"journal":{"name":"2014 Power Systems Computation Conference","volume":"2 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116928108","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":"Calculation of voltage unbalance factor in power system supplying traction transformers","authors":"L. Ladniak","doi":"10.1109/PSCC.2014.7038370","DOIUrl":"https://doi.org/10.1109/PSCC.2014.7038370","url":null,"abstract":"The article presents the models of transformers with specially connected windings for supplying catenary systems of high-speed rail. Using the symmetrical components method and equations describing the relationship between voltages and currents on the primary and secondary sides of the transformer one can derive equations describing the value of the voltage unbalance factor Eu depending on the transformer power ST and the short-circuit power of the supplying system Ss at the place of connection of the transformer to the supplying grid. The applied procedure allows for estimating voltage unbalance for single-phase, open delta Vv, Way-Delta and Scott as well as Le Blanc, Woodbridge and Roof-Delta transformer connections. The article proves that influence caused by catenary systems of HSR depend on transformer connections, the load and the short-circuit power of the supply network The voltage unbalance factor calculated for various transformer connections can be very useful when choosing an appropriate supplying method and will help create an optimal train rímetable to minimise the unbalance in supplying power system.","PeriodicalId":155801,"journal":{"name":"2014 Power Systems Computation Conference","volume":"2013 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114676124","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":"Reliability and availability analysis methodology for power system protection schemes","authors":"A. Santos, P. Correia, M. T. Barros","doi":"10.1109/PSCC.2014.7038302","DOIUrl":"https://doi.org/10.1109/PSCC.2014.7038302","url":null,"abstract":"A new methodology is presented, allowing to evaluate protection systems reliability and availability indexes, taking into account equipment failure and repair rates. The protection scheme is translated into a reliability graph, enabling to identify all possible logical occurrences in the system, either meaning failure or successful operation. Evaluation of the system reliability and availability indexes is achieved by Monte Carlo simulation. The methodology is applied to a typical transmission line protection bay, for different time to repair scenarios, and conclusions on asset management options are drawn.","PeriodicalId":155801,"journal":{"name":"2014 Power Systems Computation Conference","volume":"39 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126922271","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}