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Power system vulnerability analysis - towards validation of centrality measures 电力系统脆弱性分析——面向中心措施的验证
PES T&D 2012 Pub Date : 2012-05-07 DOI: 10.1109/TDC.2012.6281483
Timothy Ernster, A. Srivastava
{"title":"Power system vulnerability analysis - towards validation of centrality measures","authors":"Timothy Ernster, A. Srivastava","doi":"10.1109/TDC.2012.6281483","DOIUrl":"https://doi.org/10.1109/TDC.2012.6281483","url":null,"abstract":"Threat assessments play a key role in determining appropriate mitigation strategies to counter credible threats to the power system. In order to further understand the capability of a malicious agent to coordinate an attack on the power grid given limited system information, graph theory based centrality measures are utilized for power systems vulnerability analysis. Results are compared to vulnerability analysis indices utilizing DC power flow based linear sensitivity factors with complete power system information. Correlations of centrality and linear sensitivity factor based vulnerability rankings are performed, and matched pair comparisons of top rankings are presented using the nonparametric Wilcoxon signed rank statistical test. Evidence is presented in support of the edge betweeness centrality measure in determining sensitive line outages based solely on the branch impedance values of a power system. Results obtained for four different test case systems indicate the threat potential of a system attack planned from limited topology information.","PeriodicalId":19873,"journal":{"name":"PES T&D 2012","volume":"20 1","pages":"1-6"},"PeriodicalIF":0.0,"publicationDate":"2012-05-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85630294","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: 30
Fault location for power lines with multiple sections 多段电力线故障定位
PES T&D 2012 Pub Date : 2012-05-07 DOI: 10.1109/TDC.2012.6281511
Y. Gong, M. Mynam, A. Guzman
{"title":"Fault location for power lines with multiple sections","authors":"Y. Gong, M. Mynam, A. Guzman","doi":"10.1109/TDC.2012.6281511","DOIUrl":"https://doi.org/10.1109/TDC.2012.6281511","url":null,"abstract":"Fault location information is critical for operating and maintaining transmission and subtransmission networks. Some of the challenges in calculating accurate fault location include fault resistance, zero-sequence impedance variations, zero-sequence mutual coupling, load, system nonhomogeneity, and power lines composed of multiple sections with considerably different characteristics. This paper presents a fault location method that provides accurate fault location information for power lines with multiple sections. These sections can have different impedance characteristics. The proposed method is suitable for different types of power lines, including overhead lines, underground cables, and composite lines that include both overhead line and underground cable sections. Fault resistance, parallel-line mutual coupling, system nonhomogeneity, and load variations have minimal effect on the accuracy of the proposed fault location method. This paper compares fault location results calculated from event reports that were obtained from the field and from models of real power systems.","PeriodicalId":19873,"journal":{"name":"PES T&D 2012","volume":"83 1","pages":"1-6"},"PeriodicalIF":0.0,"publicationDate":"2012-05-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88967652","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
Use of modern technologies and software to deliver efficient design and optimization of 1380 km long bipole III ±500 kV HVDC transmission line, Manitoba, Canada 利用现代技术和软件，为加拿大马尼托巴省1380公里长的双极III±500千伏高压直流输电线路提供高效的设计和优化
PES T&D 2012 Pub Date : 2012-05-07 DOI: 10.1109/TDC.2012.6281455
E. Ghannoum, Z. Kieloch
{"title":"Use of modern technologies and software to deliver efficient design and optimization of 1380 km long bipole III ±500 kV HVDC transmission line, Manitoba, Canada","authors":"E. Ghannoum, Z. Kieloch","doi":"10.1109/TDC.2012.6281455","DOIUrl":"https://doi.org/10.1109/TDC.2012.6281455","url":null,"abstract":"The new ±500 kV HVDC Bipole III line is one of the longest transmission lines to be built in North America. It will connect the generation source on the Nelson River in Northern Manitoba with the load centre located near Winnipeg in the South. Modern technologies have been used for designing and optimization this line such as: the use of LiDAR survey which provided accurate time/cost efficient non invasive survey of the line corridor, use of Reliability Based Design (RBD) method that provides more cost efficiency and higher reliability than common deterministic methods, use of modern software that allows a extremely efficient import of LiDAR survey data and creation of line profiles for tower spotting. The same software was also used to select the family of towers to be designed and for tower spotting that results in the minimum line cost.","PeriodicalId":19873,"journal":{"name":"PES T&D 2012","volume":"40 1","pages":"1-6"},"PeriodicalIF":0.0,"publicationDate":"2012-05-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86379635","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
The role of energy storage in transmission and distribution efficiency 储能在输配电效率中的作用
PES T&D 2012 Pub Date : 2012-05-07 DOI: 10.1109/TDC.2012.6281537
W. Jewell, Zhouxing Hu
{"title":"The role of energy storage in transmission and distribution efficiency","authors":"W. Jewell, Zhouxing Hu","doi":"10.1109/TDC.2012.6281537","DOIUrl":"https://doi.org/10.1109/TDC.2012.6281537","url":null,"abstract":"Energy storage systems that are properly placed on the transmission system can be used to relieve transmission congestion. Similarly, storage on distribution can be used to reduce peak loads. The reduction in currents produced by congestion relief and peak reduction may also result in a decrease in line losses. Further efficiency improvements could be realized by optimizing the placement and scheduling of energy storage for loss reduction and efficiency improvement. The efficiency of the storage systems themselves, however, may limit their use in loss reduction or system efficiency improvement. Typical round-trip efficiencies for bulk storage systems are 70-85% for pumped hydro and 70-90% for electrochemical batteries. Comparing this with North American transmission and distribution efficiencies that usually exceed 90%, the case for using storage to improve overall efficiency may be difficult to make. This presentation will examine the issues, comparing storage efficiencies with transmission and distribution efficiencies. It will examine selected cases to address the feasibility of optimizing the placement and scheduling of energy storage to improve system efficiency and reduce greenhouse gas emissions. Efficiency improvement will then be discussed in the context of the other potential benefits and costs of storage.","PeriodicalId":19873,"journal":{"name":"PES T&D 2012","volume":"17 1","pages":"1-4"},"PeriodicalIF":0.0,"publicationDate":"2012-05-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81262438","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: 23
High voltage insulator mechanical load limitations and load resistance factor design 高压绝缘子机械负载限制及负载阻力系数设计
PES T&D 2012 Pub Date : 2012-05-07 DOI: 10.1109/TDC.2012.6281416
A. Baker
{"title":"High voltage insulator mechanical load limitations and load resistance factor design","authors":"A. Baker","doi":"10.1109/TDC.2012.6281416","DOIUrl":"https://doi.org/10.1109/TDC.2012.6281416","url":null,"abstract":"This paper discusses the current practice for selecting high voltage insulators and the changes needed to accommodate Load Resistance Factor Design. Conversion of insulator rated strength, defined according to ANSI C29 Standards, to damage limit strength to provide the service limit resistance required by LRFD is discussed. Specific values of service limit resistance and strength factors for different types of high voltage insulators are presented for further consideration by those responsible for revising current line loading and strength regulations and insulator standards.","PeriodicalId":19873,"journal":{"name":"PES T&D 2012","volume":"19 1","pages":"1-6"},"PeriodicalIF":0.0,"publicationDate":"2012-05-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89359085","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: 0
The multi-objective optimization dispatch of energy-saving coordination of Combined Cold Heat and Power 冷热电联产节能协调的多目标优化调度
PES T&D 2012 Pub Date : 2012-05-07 DOI: 10.1109/TDC.2012.6281577
Xiaohong Ran, R. Zhou
{"title":"The multi-objective optimization dispatch of energy-saving coordination of Combined Cold Heat and Power","authors":"Xiaohong Ran, R. Zhou","doi":"10.1109/TDC.2012.6281577","DOIUrl":"https://doi.org/10.1109/TDC.2012.6281577","url":null,"abstract":"Combined Cold Heat and Power (CCHP) is a breakthrough to achieve energy saving and emission reduction. By introducing the heat equivalent, the cold, heat and power are transformed equivalently, and then new objective function is proposed about generation cost and environmental cost of CCHP. In order to reduce unnecessary energy wasting and the random of supplying cold heat and power in different operation condition, so the coordination cost of cold heat and power is set up according to the theory of changing price with time. So a multi-objective optimization model of energy-saving dispatch is formulated based on generation cost, environmental cost and coordination cost of CCHP, and then we solve the problem with the fuzzy optimization programming. The results show that the model is vital in economic dispatch, especially after considering coordination cost, not only can effective manage the need of power and realize peak load shaving. The more important is to be able to change energy production and operation way due to the mismatching of cold heat and power load. It also provides the reference for the promotion of energy -saving dispatch of CCHP.","PeriodicalId":19873,"journal":{"name":"PES T&D 2012","volume":"7 1","pages":"1-5"},"PeriodicalIF":0.0,"publicationDate":"2012-05-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89396533","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
Coordinated control of a solar and battery system in a microgrid 微电网中太阳能和电池系统的协调控制
PES T&D 2012 Pub Date : 2012-05-07 DOI: 10.1109/TDC.2012.6281700
Ling Xu, Zhixin Miao, Lingling Fan
{"title":"Coordinated control of a solar and battery system in a microgrid","authors":"Ling Xu, Zhixin Miao, Lingling Fan","doi":"10.1109/TDC.2012.6281700","DOIUrl":"https://doi.org/10.1109/TDC.2012.6281700","url":null,"abstract":"This paper investigates the control strategies of a Li-Ion battery group with a PV array within a microgrid. In the grid-connected mode, the battery and the PV array operate at power control mode, while in the autonomous mode the battery provides voltage and frequency control instead. This paper presents a detailed model of battery including state of charge (SOC) modeling, analysis of short-time and long-time transient characteristics, and analysis of a detailed PV array model. This paper also presents effective control strategies for a battery with the PV array system to operate at both the grid-connected and the autonomous modes. The paper presents results from a test microgrid consisting of a voltage source converter (VSC) interfaced battery, a PV array, passive loads and an induction machine which is built using power systems simulation software. The paper presents results from simulations that demonstrate the proposed control strategies, which could assist in the coordination of independent distributed generation.","PeriodicalId":19873,"journal":{"name":"PES T&D 2012","volume":"51 1","pages":"1-7"},"PeriodicalIF":0.0,"publicationDate":"2012-05-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87233053","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: 24
Control for grid connected PMSG Wind turbine with DC link capacitance reduction 直流链路电容减小的并网PMSG风力发电机控制
PES T&D 2012 Pub Date : 2012-05-07 DOI: 10.1109/TDC.2012.6281425
D. F. Ortega, W. Shireen, F. Castelli-Dezza
{"title":"Control for grid connected PMSG Wind turbine with DC link capacitance reduction","authors":"D. F. Ortega, W. Shireen, F. Castelli-Dezza","doi":"10.1109/TDC.2012.6281425","DOIUrl":"https://doi.org/10.1109/TDC.2012.6281425","url":null,"abstract":"An enhanced control is presented that effectively cancels the noise in torque, and currents in a wind turbine Permanent Magnet Synchronous Generator. The proposed control also allows the reduction of the DC-Link capacitance. Simulations succeed on Three Phase and Single Phase grid connection, through a Back to Back converter. The grid side converter switching function was modified with an algorithm that represents the noise from grid frequency. The DC Link ripple due to capacitor reduction was canceled, and as a consequence there were no noise frequencies on electromagnetic torque, stator and grid currents after the algorithm was implemented. Remarkable reduction in DC Link capacitor was possible, making the system more reliable and economical. The PMSG is protected from core saturation, because stator currents consist of only the fundamental frequency component. This results in a constant torque, preventing mechanical stress.","PeriodicalId":19873,"journal":{"name":"PES T&D 2012","volume":"19 1","pages":"1-8"},"PeriodicalIF":0.0,"publicationDate":"2012-05-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84018138","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: 9
Reliability value of fast state estimation on power systems 电力系统快速状态估计的可靠性值
PES T&D 2012 Pub Date : 2012-05-07 DOI: 10.1109/TDC.2012.6281657
M. Elizondo, Yousu Chen, Zhenyu Huang
{"title":"Reliability value of fast state estimation on power systems","authors":"M. Elizondo, Yousu Chen, Zhenyu Huang","doi":"10.1109/TDC.2012.6281657","DOIUrl":"https://doi.org/10.1109/TDC.2012.6281657","url":null,"abstract":"Monitoring the state of a power system under stress is key to achieving reliable operation. State estimation and timely measurements become more important when applying and designing corrective control actions (manual and automatic) to arrest or mitigate cascading blackouts. The execution time of each process, including state estimation, should be as short as possible to allow for timely action. In this paper, we provide a methodology for estimating one of the components of value of faster and more frequent state estimation: the reliability value of state estimation to assist corrective control actions for arresting or mitigating cascading blackouts. We use an algorithm for estimating the time between successive line trips in a cascading failure. The algorithm combines power flow calculations with characteristics of the protection system to estimate the time between successive equipment trips. Using this algorithm, we illustrate the value of fast state estimation by calculating the time remaining for automatic or manual corrective actions after state estimation is finalized.","PeriodicalId":19873,"journal":{"name":"PES T&D 2012","volume":"25 1","pages":"1-6"},"PeriodicalIF":0.0,"publicationDate":"2012-05-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87148336","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: 7
Conservation Voltage Reduction with feedback from Advanced Metering Infrastructure 基于先进计量基础设施反馈的保护电压降低
PES T&D 2012 Pub Date : 2012-05-07 DOI: 10.1109/TDC.2012.6281644
M. A. Peskin, P. W. Powell, E. J. Hall
{"title":"Conservation Voltage Reduction with feedback from Advanced Metering Infrastructure","authors":"M. A. Peskin, P. W. Powell, E. J. Hall","doi":"10.1109/TDC.2012.6281644","DOIUrl":"https://doi.org/10.1109/TDC.2012.6281644","url":null,"abstract":"Dominion Virginia Power's Conservation Voltage Reduction program has demonstrated energy savings of up to 4% by optimizing off-peak voltage. The key innovation is incorporating end-of-line voltage data from every customer meter, which eliminates the need to maintain an electrical model of the feeder. CVR is accomplished via DMS control of the load tap changer based on voltage feedback from AMI meter data. Analysis of AMI voltage data determines a subset of meters representing the lowest customer voltages; these meters are read every 15 minutes and used to determine the optimal feeder voltage. A statistical evaluation of pilot feeders shows a CVR factor of 0.92% reduction in energy for each 1% reduction in voltage. In addition, customer voltage monitoring identifies operational issues prior to customer calls. The program is projected to save an average of 2.8% of annual energy when applied system-wide, and may be expanded to accomplish on-peak demand reduction.","PeriodicalId":19873,"journal":{"name":"PES T&D 2012","volume":"130 1","pages":"1-8"},"PeriodicalIF":0.0,"publicationDate":"2012-05-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85345839","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: 49
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