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Value of supply interruptions and its impact on optimal solutions in distribution networks 供应中断的价值及其对配电网最优解决方案的影响
2014 IEEE PES T&D Conference and Exposition Pub Date : 2014-04-14 DOI: 10.1109/TDC.2014.6863408
P. Skala, V. Detfich, O. Bucholcer, Z. Špaček
{"title":"Value of supply interruptions and its impact on optimal solutions in distribution networks","authors":"P. Skala, V. Detfich, O. Bucholcer, Z. Špaček","doi":"10.1109/TDC.2014.6863408","DOIUrl":"https://doi.org/10.1109/TDC.2014.6863408","url":null,"abstract":"This paper deals with a comparison of an optimal solution of equipping a MV distribution network when different financial equivalents of supply interruption are taken into account. The comparison elicits from the optimization studies performed for real feeders of 22kV overhead lines. The reliability of each feeder section is simulated by the non-sequential Monte Carlo method. Statistical distributions used in the simulation are based on a failure database covering a 10-year period. The comparison is carried out for an optimization task whose objective is allocation of telecontrolled switching elements (telecontrolled section switches and reclosers). The results are presented for a single feeder and for a representative set of real feeders. Due to the fact that the selection of the financial equivalent of supply interruptions (the value of supply interruption) is strongly connected to a regulation framework, current regulation of supply continuity in the Czech Republic and its expected evolutions are summarized.","PeriodicalId":161074,"journal":{"name":"2014 IEEE PES T&D Conference and Exposition","volume":"42 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-04-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121798613","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
Droop based steady state control algorithm for a meshed HVDC grid 基于下垂的网格直流电网稳态控制算法
2014 IEEE PES T&D Conference and Exposition Pub Date : 2014-04-14 DOI: 10.1109/TDC.2014.6863240
K. Yunus, T. Thiringer, O. Carlson
{"title":"Droop based steady state control algorithm for a meshed HVDC grid","authors":"K. Yunus, T. Thiringer, O. Carlson","doi":"10.1109/TDC.2014.6863240","DOIUrl":"https://doi.org/10.1109/TDC.2014.6863240","url":null,"abstract":"In this paper, a steady state model of a power flow control algorithm for a meshed HVDC grid proposed. The objective of a power flow control in a DC grid, as in a point-to-point transmission, concerns controlling the DC voltage in the system within its limits and fulfill the power input/output at the PCC (Point of Common Coupling) to the AC system, without exceeding maximum currents through the valves, lines or cables. The best power flow control can be achieved with the use of DC-DC converters at the nodes of the meshed HVDC grid. However, the use of the DC-DC converters in such a DC grid is quite costly, especially if implemented in an offshore environment. The main contribution of this paper is to demonstrate how the control of steady state power flow in the DC grid can be achieved without using the DC-DC converters. The control algorithm is derived based on the principles of droop control.","PeriodicalId":161074,"journal":{"name":"2014 IEEE PES T&D Conference and Exposition","volume":"58 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-04-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127588868","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
Modeling and simulation of a high-head pumped hydro system 高水头抽水蓄能系统的建模与仿真
2014 IEEE PES T&D Conference and Exposition Pub Date : 2014-04-14 DOI: 10.1109/TDC.2014.6863219
Hang Li, Gregory K. Parker, B. Johnson, J. Law, Kyle D Morse, D. Elger
{"title":"Modeling and simulation of a high-head pumped hydro system","authors":"Hang Li, Gregory K. Parker, B. Johnson, J. Law, Kyle D Morse, D. Elger","doi":"10.1109/TDC.2014.6863219","DOIUrl":"https://doi.org/10.1109/TDC.2014.6863219","url":null,"abstract":"Increasing penetration of intermittent renewable generation, such as solar or wind, will lead to the deviation of the power grid frequency from normal due to the randomness of the output renewable energy sources. Pumped storage can be used to balance the renewable output in a manner to regulate the frequency of the grid. This paper presents a feasibility study of a proposed pumped storage system used to regulate the frequency of power grid to meet the NERC CPS2 standard in response to variable renewable energy output. Studies are performed using dynamic electrical and hydraulic models of the pumped hydro system.","PeriodicalId":161074,"journal":{"name":"2014 IEEE PES T&D Conference and Exposition","volume":"54 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-04-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132525597","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: 3
Novel installation of a 138kV pipe-type cable system under water using horizontal directional drilling 采用水平定向钻井技术在水下新型安装138kV管式电缆系统
2014 IEEE PES T&D Conference and Exposition Pub Date : 2014-04-14 DOI: 10.1109/TDC.2014.6863533
Earle C. Rusty Bascom, Joseph Rezutko
{"title":"Novel installation of a 138kV pipe-type cable system under water using horizontal directional drilling","authors":"Earle C. Rusty Bascom, Joseph Rezutko","doi":"10.1109/TDC.2014.6863533","DOIUrl":"https://doi.org/10.1109/TDC.2014.6863533","url":null,"abstract":"While the power cable industry throughout the world is moving towards using extruded cable systems for most new ac cable projects, some North American utilities continue the use of high-pressure pipe-type (HPPT) cable systems for specific projects because of the long history of reliable operation using oil-impregnated paper and because the systems afford favorable conditions where long pulling lengths are required. This paper discusses the use of a unique cable design and application of horizontal directional drilling (HDD) to install nitrogen gas-filled HPPT cable under a marine setting in order to minimize the impact on the environment. The HPPT cable system permitted very long cable pulling distances of more than 1.6km, and was able to meet the utility's power transfer needs. The paper summarizes challenges that were encountered during design and construction of the project.","PeriodicalId":161074,"journal":{"name":"2014 IEEE PES T&D Conference and Exposition","volume":"26 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-04-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133615135","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
Real time probabilistic security risk assessment at an EMS EMS的实时概率安全风险评估
2014 IEEE PES T&D Conference and Exposition Pub Date : 2014-04-14 DOI: 10.1109/TDC.2014.6863338
Jifeng Wang, Yinsheng Su, Jianshe Li, C. Jing, Di Shi
{"title":"Real time probabilistic security risk assessment at an EMS","authors":"Jifeng Wang, Yinsheng Su, Jianshe Li, C. Jing, Di Shi","doi":"10.1109/TDC.2014.6863338","DOIUrl":"https://doi.org/10.1109/TDC.2014.6863338","url":null,"abstract":"An online risk-based security assessment system-Probabilistic Security Risk Assessment (PSRA) has been developed and implemented at China Southern Power Grid. PSRA calculates the probability or likelihood of each undesirable event in the transmission system and evaluates the corresponding severity. In PSRA, the probability measure of each undesirable event is combined with the consequence measure into a single reliability index-Probabilistic Loss of Load Index. When power system is insecure, optimal generation re-dispatch is implemented to ensure the system goes back to the secure region. Under emergency conditions, when generation re-dispatch alone is not enough, load shedding will be enforced to bring the system back to the security region. Weak point analysis is developed and used to identify the buses and branches that are most vulnerable. Online implementation of PSRA is also discussed and it is concluded that the proposed probabilistic reliability analysis is much more accurate than traditional methods and it provides system operators the capability to make faster trade-off decisions between economy and technical constraints.","PeriodicalId":161074,"journal":{"name":"2014 IEEE PES T&D Conference and Exposition","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-04-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134568272","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
Integrated methodology between metaheuristic techniques for optimal vegetation maintenance in distribution systems 配电网最佳植被维护的元启发式综合方法
2014 IEEE PES T&D Conference and Exposition Pub Date : 2014-04-14 DOI: 10.1109/TDC.2014.6863386
L. A. Arias, R. A. Hincapié, E. M. Granada
{"title":"Integrated methodology between metaheuristic techniques for optimal vegetation maintenance in distribution systems","authors":"L. A. Arias, R. A. Hincapié, E. M. Granada","doi":"10.1109/TDC.2014.6863386","DOIUrl":"https://doi.org/10.1109/TDC.2014.6863386","url":null,"abstract":"Tree pruning underneath overhead distribution networks is a practice done by utilities, because the vegetation contact with the energized lines represents one of the major causes of interruption electric energy supply. The problem of vegetation maintenance can be studied through two mathematical models. The first model corresponds to a model where the non-served energy level NSEL is minimized; the second model minimizes the average percentage of violation of the security zone APSZ, which refers to a minimum distance between the energized lines and the vegetation. When maintenance cost MC function is added in both models, these are converted into multi-objective models. In this article, it is implemented a quality and quantity improvement methodology of a solutions front that represents a set of vegetation maintenance schedules. This methodology is performed as a hybrid between the genetic algorithm proposed by Chu & Beasley GACB and the non-dominated sorting genetic algorithm NSGA II.","PeriodicalId":161074,"journal":{"name":"2014 IEEE PES T&D Conference and Exposition","volume":"106 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-04-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133040213","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
Demand response with photovoltaic energy source and Time-of-Use pricing 光伏能源和分时电价的需求响应
2014 IEEE PES T&D Conference and Exposition Pub Date : 2014-04-14 DOI: 10.1109/TDC.2014.6863304
A. S. Leger, E. Sobiesk, Alexander Farmer, Blake Rulison
{"title":"Demand response with photovoltaic energy source and Time-of-Use pricing","authors":"A. S. Leger, E. Sobiesk, Alexander Farmer, Blake Rulison","doi":"10.1109/TDC.2014.6863304","DOIUrl":"https://doi.org/10.1109/TDC.2014.6863304","url":null,"abstract":"Several utilities are offering, or plan to offer, customers the choice between standard and “Time-of-Use” (ToU) rates for electricity. ToU rates for energy are based on a tiered pricing structure as opposed to standard flat rates. ToU rates are typically less than the standard rate during off-peak times and higher than the standard rate at peak times. This pricing structure can incentivize combining demand response (DR) with photovoltaic (PV) generation which can shift a customer's net demand from peak to off-peak times. This paper presents a demand response scheme designed for implementation with photovoltaic generation within a ToU pricing environment. The DR algorithm is designed to require minimal sensors, does not require forecasting, and is suitable for automation. Simulation results validating the DR algorithm and quantifying potential savings based on the level of DR are presented based on PV generation data and residential load consumption data in New York.","PeriodicalId":161074,"journal":{"name":"2014 IEEE PES T&D Conference and Exposition","volume":"53 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-04-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114253975","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
Decentralized network reconfiguration and restoration for smart distribution systems — Part I: Decentralized approach 智能配电系统的分散网络重构和恢复。第1部分:分散方法
2014 IEEE PES T&D Conference and Exposition Pub Date : 2014-04-14 DOI: 10.1109/TDC.2014.6863196
F. Ding, K. Loparo
{"title":"Decentralized network reconfiguration and restoration for smart distribution systems — Part I: Decentralized approach","authors":"F. Ding, K. Loparo","doi":"10.1109/TDC.2014.6863196","DOIUrl":"https://doi.org/10.1109/TDC.2014.6863196","url":null,"abstract":"Network reconfiguration is a constrained, nonlinear, integer optimization problem. This paper presents a decentralized methodology that is capable of incorporating network reconfiguration algorithms to minimize power losses for smart distribution systems. The “optimal” configuration of the entire system results from collaborations of individual agents, and the computational time is greatly reduced compared with conventional approaches.","PeriodicalId":161074,"journal":{"name":"2014 IEEE PES T&D Conference and Exposition","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-04-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114191543","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
Research on coordinated control technology for AC/DC hybrid system in China 中国交直流混合动力系统协调控制技术研究
2014 IEEE PES T&D Conference and Exposition Pub Date : 2014-04-14 DOI: 10.1109/TDC.2014.6863231
Jinhua Zhang, Ziping Wu, H. Tao, Wenchao Zhang
{"title":"Research on coordinated control technology for AC/DC hybrid system in China","authors":"Jinhua Zhang, Ziping Wu, H. Tao, Wenchao Zhang","doi":"10.1109/TDC.2014.6863231","DOIUrl":"https://doi.org/10.1109/TDC.2014.6863231","url":null,"abstract":"As the power industry is rapidly developing in China, the regional grid interconnections are now under construction. Based on the existing planning national grid configuration, the AC/DC coordinated control technology for regional interconnected power grid is developed in this paper. By 2013, there have been six High Voltage Direct Current (HVDC) transmission lines delivering power from Central China to East China. Based on the planning Ultra High Voltage (UHV) power grid in China, a series of simulation tests is carried out. The following topics are investigated in this paper: 1) How multiple HVDC systems support each other under the loss of bipolar HVDC transmission capacity; 2) How the HVDC system is applied to providethe emergent power support for the parallel AC power corridors when severe faults occur in the AC system; 3) How is the impact of the AC/DC coordinated control on the AC system. According to several simulation experiments under the typical kinds of faults, the conclusions can be drawn as follows: 1) Once the bipolar fault occurs at any one of above six HVDC lines, the power transferring and voltage fluctuation of AC network after fault could be dramatically diminished when the power running up is issued to the other five HVDC lines 2) Once a large amount of generation lost occurs in East China Power grid, power run up of above six HVDC lines can significantly improve the stability margin of Central China Power Grid — East China Power Grid. Finally, a suggestion of establishing a coordinated control center is proposed so as to realize the cooperative control among multiple HVDC lines in case of various system emergencies.","PeriodicalId":161074,"journal":{"name":"2014 IEEE PES T&D Conference and Exposition","volume":"20 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-04-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114556975","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
Design of bypass diodes in improving energy extraction of solar PV systems under uneven shading conditions 在不均匀遮阳条件下改善太阳能光伏系统能量提取的旁路二极管设计
2014 IEEE PES T&D Conference and Exposition Pub Date : 2014-04-14 DOI: 10.1109/TDC.2014.6863390
H. Zheng, Shuhui Li
{"title":"Design of bypass diodes in improving energy extraction of solar PV systems under uneven shading conditions","authors":"H. Zheng, Shuhui Li","doi":"10.1109/TDC.2014.6863390","DOIUrl":"https://doi.org/10.1109/TDC.2014.6863390","url":null,"abstract":"Solar photovoltaic (PV) energy is becoming an increasingly important part of the world's renewable energy. To enhance energy conversion efficiency, bypass diodes have been used in PV systems. The usage of bypass diodes is particularly effective when a PV system is under an uneven shading condition. However, shading is normally applied to a PV array in very random manners, making shading analysis and improvement contributed by the bypass diodes extremely hard to access. This paper performs a comprehensive study on the PV array energy extraction characteristics under a variety of shading conditions. Based on the study, an enhanced bypass diode design in terms of doping concentration is proposed. Investigation of the proposed bypass diode scheme shows that such bypass diode design is effective in improving energy capture efficiency under diverse shading conditions. Significant simulation studies are conducted for detailed evaluation of a PV system with the different bypass diode schemes and process.","PeriodicalId":161074,"journal":{"name":"2014 IEEE PES T&D Conference and Exposition","volume":"115 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-04-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117266077","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
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