{"title":"Voltage stability of low frequency AC transmission systems","authors":"T. Ngo, Q. Nguyen, S. Santoso","doi":"10.1109/TDC.2016.7519944","DOIUrl":"https://doi.org/10.1109/TDC.2016.7519944","url":null,"abstract":"This paper investigates the voltage stability of a power system with low frequency AC (LFAC) transmission. Under low frequency conditions, transmission line reactance is reduced and thus the voltage drop along the transmission line is decreased. The LFAC system, therefore, is superior to the conventional 60-Hz system in terms of power transfer capability and, more importantly, voltage instability. In other words, the LFAC can drive a power system further away from instability mode in comparison to the conventional 60-Hz system. A power system voltage stability can be quantified and displayed with the eigenvalues of a Jacobian matrix and the self-sensitivity values by using the modal analysis method. In this paper, the theoretical stability of an LFAC system is discussed first and then validated using several transmission system case studies. The simulation and analysis results show that the LFAC system outperforms the conventional 60 Hz system in terms of voltage stability.","PeriodicalId":6497,"journal":{"name":"2016 IEEE/PES Transmission and Distribution Conference and Exposition (T&D)","volume":"222 1","pages":"1-5"},"PeriodicalIF":0.0,"publicationDate":"2016-05-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"73112591","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":"Including surge arresters in the lightning performance analysis of 132kV transmission line","authors":"Saeed Mohajeryami, M. Doostan","doi":"10.1109/TDC.2016.7519906","DOIUrl":"https://doi.org/10.1109/TDC.2016.7519906","url":null,"abstract":"Line arresters are considered as an effective way to improve the lightning performance of transmission lines, especially in parts of line that suffer from high soil resistivity and lightning ground flash density. This paper presents results of the application of line surge arresters on the 132KV double circuit transmission line in EMTP-RV and all the practical scenarios for installation of surge arresters. The study has shown that a significant level of improvement can be reached by installing arresters at all or only some of the line phases. It can increase the strength of the line to withstand lightning currents up to -292kA. the probability of having this lightning current, is practically zero.","PeriodicalId":6497,"journal":{"name":"2016 IEEE/PES Transmission and Distribution Conference and Exposition (T&D)","volume":"21 1","pages":"1-5"},"PeriodicalIF":0.0,"publicationDate":"2016-05-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80404249","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 approach in evaluation of backflashover in 230kV double circuit transmission line","authors":"Saeed Mohajeryami, M. Doostan","doi":"10.1109/TDC.2016.7519993","DOIUrl":"https://doi.org/10.1109/TDC.2016.7519993","url":null,"abstract":"In order to study the problems posed by lightning stroke on vastly exposed transmission lines, it is essential to study different lightning overvoltage phenomena. One of the most significant electrical transients caused by lightning is backflashover. In this paper, by applying Monte Carlo method and considering accurate models of transmission line, grounding system and physical model of breakdown in insulator gap, the backflashover is studied on a 230 kV double circuit transmission line. To apply the proposed approach, the selected case study is simulated in EMTP-RV software and the results are presented.","PeriodicalId":6497,"journal":{"name":"2016 IEEE/PES Transmission and Distribution Conference and Exposition (T&D)","volume":"18 1","pages":"1-5"},"PeriodicalIF":0.0,"publicationDate":"2016-05-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79011432","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 Luo, Jun Yang, Yufei Tang, Haibo He, Mingsong Liu
{"title":"Chance constraint based risk-aware optimal power flow for cascading failure prevention","authors":"Chao Luo, Jun Yang, Yufei Tang, Haibo He, Mingsong Liu","doi":"10.1109/TDC.2016.7520014","DOIUrl":"https://doi.org/10.1109/TDC.2016.7520014","url":null,"abstract":"Once part or whole of the power system is exposed to some dangerous situations, e.g., malicious terrorist attacks or extreme weather conditions, the potential cascading failure is a severe threat to the power system. However, some feasible prevention control strategies can be used to enhance the system robust to cope with the impact of cascading failure. This paper proposed a chance constraint based optimal power flow model considering the impact of cascading failure. Compared to the conventional optimal power flow model, the proposed one can obtain the optimal generation profile that satisfies the chance constraint on the risk level of cascading failure. Power redispatch that is implemented according to the obtained generation profile can be seen as a prevention strategy, which can reduce the threat of cascading failure to an acceptable level. PSO algorithm and Monte Carlo method were used to search for the optimal solution. Case studies on the IEEE 39-bus system illustrate the effectiveness of the proposed model.","PeriodicalId":6497,"journal":{"name":"2016 IEEE/PES Transmission and Distribution Conference and Exposition (T&D)","volume":"105 1","pages":"1-5"},"PeriodicalIF":0.0,"publicationDate":"2016-05-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79027122","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":"Multi-temporal optimal power flow for assessing the renewable generation hosting capacity of an active distribution system","authors":"E. Grover-Silva, R. Girard, G. Kariniotakis","doi":"10.1109/TDC.2016.7520043","DOIUrl":"https://doi.org/10.1109/TDC.2016.7520043","url":null,"abstract":"The detailed modeling of distribution grids is expected to be critical to understand the current functionality limits and necessary retrofits to satisfy integration of massive amounts of distributed generation, energy storage devices and the electric consumption demand of the future. Due to the highly dimensional non-convex characteristics of the power flow equations, convex relaxations have been used to ensure an efficient calculation time. However, these relaxations have been proven to be inexact during periods of high RES injection. In this paper additional linear constraints were introduced in the power flow formulation to guaranty an exact relaxation. This convex relaxation is then applied within a multi-temporal algorithm in order to evaluate the benefits of storage grid integration. The case study of a French medium voltage feeder is studied to evaluate the maximum capacity of the grid to host RES sources and the advantages of storage systems in reducing curtailment of RES.","PeriodicalId":6497,"journal":{"name":"2016 IEEE/PES Transmission and Distribution Conference and Exposition (T&D)","volume":"42 1","pages":"1-5"},"PeriodicalIF":0.0,"publicationDate":"2016-05-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84230822","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":"Adaptive Instantaneous Overcurrent Powered By Frequency Estimation: A case study using a real Brazilian system","authors":"C. Souza, H. Sanca, F. Costa, B. A. Souza","doi":"10.1109/TDC.2016.7520033","DOIUrl":"https://doi.org/10.1109/TDC.2016.7520033","url":null,"abstract":"With increasing of distributed generation (DG) and smart grid applications, power protection system (PPS) have been passing for several challenges. Traditional relay coordination presents a relevant difficult to operate with DG plants. Modifications on short-circuits levels and current directionality may include miscoordinations on PPS. An alternative of traditional relay system is adaptive protective system (APS). APS provides an automatic update of relay setting ever when power grid have a modification. A large number of method may be used to identify these modification. In this paper a frequency estimation method was used to identify grid modification and flag to APS methods. To evaluate proposed method, a real Brazilian distribution system was used considering that only instantaneous overcurrent relay compose PPS. Obtainer results shown a efficacy on grid topology identification and same modification among obtained relay settings using APS architecture.","PeriodicalId":6497,"journal":{"name":"2016 IEEE/PES Transmission and Distribution Conference and Exposition (T&D)","volume":"68 1","pages":"1-5"},"PeriodicalIF":0.0,"publicationDate":"2016-05-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81108845","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}
Mingjian Cui, Jie Zhang, Hongyu Wu, B. Hodge, D. Ke, Yuanzhan Sun
{"title":"Wind power ramping product for increasing power system flexibility","authors":"Mingjian Cui, Jie Zhang, Hongyu Wu, B. Hodge, D. Ke, Yuanzhan Sun","doi":"10.1109/TDC.2016.7520002","DOIUrl":"https://doi.org/10.1109/TDC.2016.7520002","url":null,"abstract":"With increasing penetrations of wind power, system operators are concerned about a potential lack of system flexibility and ramping capacity in real-time dispatch stages. In this paper, a modified dispatch formulation is proposed considering the wind power ramping product (WPRP). A swinging door algorithm (SDA) and dynamic programming are combined and used to detect WPRPs in the next scheduling periods. The detected WPRPs are included in the unit commitment (UC) formulation considering ramping capacity limits, active power limits, and flexible ramping requirements. The modified formulation is solved by mixed integer linear programming. Numerical simulations on a modified PJM 5-bus System show the effectiveness of the model considering WPRP, which not only reduces the production cost but also does not affect the generation schedules of thermal units.","PeriodicalId":6497,"journal":{"name":"2016 IEEE/PES Transmission and Distribution Conference and Exposition (T&D)","volume":"14 1","pages":"1-5"},"PeriodicalIF":0.0,"publicationDate":"2016-05-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85897511","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":"Application of Battery Energy Storage for network vulnerability mitigation","authors":"A. Moeini, I. Kamwa, M. de Montigny, L. Lenoir","doi":"10.1109/TDC.2016.7519928","DOIUrl":"https://doi.org/10.1109/TDC.2016.7519928","url":null,"abstract":"To comply with modern power system regulatory standards, new security strategies and resiliency efforts are required. This work proposes application of Battery Energy Storage (BES) for network vulnerability mitigation. First, a novel disturbance-based vulnerability index is introduced to quantify the robustness of the network. The network vulnerability index (NVI) is a function of the current power flow variables, related distances from security limits and those of post contingency situations, caused by lines and generators outages. Next, Non dominated Sorting Genetic Algorithm II (NSGA-II) is coded on a computing cluster, taking advantage of a massively distributed environment, to optimally allocate BES units while minimizing total size of BES and NVI simultaneously. Study results on IEEE Reliability Test System 1996 (RTS96) prove the effectiveness of NVI to measure the level of network vulnerability. Moreover, it is shown that BES units, if optimally sited and sized, can contribute to the grid resiliency.","PeriodicalId":6497,"journal":{"name":"2016 IEEE/PES Transmission and Distribution Conference and Exposition (T&D)","volume":"196 1","pages":"1-5"},"PeriodicalIF":0.0,"publicationDate":"2016-05-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79891311","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":"Noise recognition of power transformers based on improved MFCC and VQ","authors":"B. Yan, G. Qian, F. H. Wang, S. Chen","doi":"10.1109/TDC.2016.7519923","DOIUrl":"https://doi.org/10.1109/TDC.2016.7519923","url":null,"abstract":"This paper presents a new method to recognize the noise characteristics of power transformer. First, frame division and windowing are applied to pre-process the noise signals. Then Mel Frequency Cepstrum Coefficient (MFCC) combined with Principal Component Analysis (PCA) is proposed to calculate the feature vectors of noise signals for high accuracy. Finally, the vector quantization (VQ) models are built to recognize the noise characteristics. The noise signals of some 10kV transformer are measured when the core is loosened in different degree. It is shown that the proposed MFCC is capable of describing the noise features of transformer accurately. The results of noise recognition by VQ are agreed well with the preset condition of core. The obtained results are helpful for the optimum design and mechanical condition assessment of power transformer.","PeriodicalId":6497,"journal":{"name":"2016 IEEE/PES Transmission and Distribution Conference and Exposition (T&D)","volume":"35 1","pages":"1-5"},"PeriodicalIF":0.0,"publicationDate":"2016-05-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82292521","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":"Impacts of short-term solar power forecasts in system operations","authors":"E. Ibanez, I. Krad, B. Hodge, E. Ela","doi":"10.1109/TDC.2016.7519885","DOIUrl":"https://doi.org/10.1109/TDC.2016.7519885","url":null,"abstract":"Solar generation is experiencing an exponential growth in power systems worldwide and, along with wind power, is posing new challenges to power system operations. Those challenges are characterized by an increase of system variability and uncertainty across many time scales: from days, down to hours, minutes, and seconds. Much of the research in the area has focused on the effect of solar forecasting across hours or days. This paper presents a methodology to capture the effect of short-term forecasting strategies and analyzes the economic and reliability implications of utilizing a simple, yet effective forecasting method for solar PV in intra-day operations.","PeriodicalId":6497,"journal":{"name":"2016 IEEE/PES Transmission and Distribution Conference and Exposition (T&D)","volume":"161 1","pages":"1-5"},"PeriodicalIF":0.0,"publicationDate":"2016-05-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88006646","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}