2018 IEEE/IAS 54th Industrial and Commercial Power Systems Technical Conference (I&CPS)最新文献_第3页

Root cause investigation of over-current ground relay tripping during energizing parallel autotransformers 并联自耦变压器通电过程中过电流接地继电器跳闸的根本原因研究

2018 IEEE/IAS 54th Industrial and Commercial Power Systems Technical Conference (I&CPS) Pub Date : 2018-05-01 DOI: 10.1109/ICPS.2018.8369982

Yunfei Wang, Xiaodong Liang, M. Jackman, H. Mazin

{"title":"Root cause investigation of over-current ground relay tripping during energizing parallel autotransformers","authors":"Yunfei Wang, Xiaodong Liang, M. Jackman, H. Mazin","doi":"10.1109/ICPS.2018.8369982","DOIUrl":"https://doi.org/10.1109/ICPS.2018.8369982","url":null,"abstract":"In this paper, the root cause of excessive zero-sequence currents observed when energizing parallel autotransformers in a power system is investigated. The studied system is a large international airport in Canada, where its power is supplied by both utility and local distributed generation (DG) feeding the load through two parallel autotransformers. Recent field monitoring data indicated that when the utility, local generators and the first autotransformer were already in operation, there were rich 3rd and 9th order harmonic currents, which caused the over-current ground relay (51G) to trip, during the second autotransformer energizing through its high voltage side while its low voltage side had already been electrically connected to the system. Through this research, the root cause of the problem is determined to be saturation of the two autotransformers. It is found that this is a special phenomenon that only occurs to parallel autotransformers. The PSCAD/EMTDC simulation is conducted for the system, and the simulation model is benchmarked using field measurement data. Two methods are developed in this paper to calculate the maximum RMS zero-sequence current flowing through the two autotransformers: 1) an analytical based simplified equivalent circuit method, and 2) a curve fitting based mathematical equation method. The solutions to prevent mis-operation of the ground relay are proposed and their effectiveness are validated by simulation, and one method has been currently implemented in the field.","PeriodicalId":142445,"journal":{"name":"2018 IEEE/IAS 54th Industrial and Commercial Power Systems Technical Conference (I&CPS)","volume":"28 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115522470","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

Density of currents and of withstand electric charges admissible for the conductors 导体允许的电流密度和承受电荷的密度

2018 IEEE/IAS 54th Industrial and Commercial Power Systems Technical Conference (I&CPS) Pub Date : 2018-05-01 DOI: 10.1109/icps.2018.8369990

G. Parise

引用次数: 0

A CPU-FPGA heterogeneous platform-based monitoring system and redundant mechanisms 一种基于CPU-FPGA异构平台的监控系统及冗余机制

2018 IEEE/IAS 54th Industrial and Commercial Power Systems Technical Conference (I&CPS) Pub Date : 2018-05-01 DOI: 10.1109/ICPS.2018.8369966

I. Matsuo, Long Zhao, Weijen Lee

引用次数: 0

Advanced service continuity and electrical safety in street lighting systems 先进的服务连续性和街道照明系统的电气安全

2018 IEEE/IAS 54th Industrial and Commercial Power Systems Technical Conference (I&CPS) Pub Date : 2018-05-01 DOI: 10.1109/ICPS.2018.8369989

G. Parise, L. Parise, Luigi De Rosa

引用次数: 0

Two application case studies of short switchboards in obstructed electrical rooms 短路配电板在封闭电气室内的两个应用案例研究

2018 IEEE/IAS 54th Industrial and Commercial Power Systems Technical Conference (I&CPS) Pub Date : 2018-05-01 DOI: 10.1109/ICPS.2018.8369991

K. Clemente

{"title":"Two application case studies of short switchboards in obstructed electrical rooms","authors":"K. Clemente","doi":"10.1109/ICPS.2018.8369991","DOIUrl":"https://doi.org/10.1109/ICPS.2018.8369991","url":null,"abstract":"A hotel switchboard located in an attached below-grade garage was corroded at its base from water entering through the building wall during extended, high-volume rainfall events. The owner requested replacement of the 35-year-old switchboard to correct several issues, even though several efforts to stop water ingress were not successful. Elevation of the replacement switchboard to guard from contact with rainwater ingress was at first thought infeasible due to low deck-to-deck height in the parking garage. An alternate construction switchboard of shorter height was specified to permit elevation of a replacement switchboard at the original location. An office building interior was thoroughly renovated, with emphasis on flooding resiliency for ground-floor elements including a service switchboard. Sandbags at exterior doors and other evidence of occasional minor flooding of the ground floor emphasized the need for design measures to protect equipment. The electrical room floor-to-ceiling height was only 8′0″, leaving little room for device elevation beyond a standard concrete housekeeping pad. An alternate construction switchboard of shorter height was specified to permit an 18″ elevation in the original location. Overhead working space was retained for use in routing feeder conduits.","PeriodicalId":142445,"journal":{"name":"2018 IEEE/IAS 54th Industrial and Commercial Power Systems Technical Conference (I&CPS)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130598810","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

Risk assessment of traction power supply system considering reliability of the protection scheme 考虑保护方案可靠性的牵引供电系统风险评估

2018 IEEE/IAS 54th Industrial and Commercial Power Systems Technical Conference (I&CPS) Pub Date : 2018-05-01 DOI: 10.1109/ICPS.2018.8370008

D. Feng, Zhengyou He, Weijen Lee, Sheng Lin, Xiaojun Sun

{"title":"Risk assessment of traction power supply system considering reliability of the protection scheme","authors":"D. Feng, Zhengyou He, Weijen Lee, Sheng Lin, Xiaojun Sun","doi":"10.1109/ICPS.2018.8370008","DOIUrl":"https://doi.org/10.1109/ICPS.2018.8370008","url":null,"abstract":"Adequate protection scheme is an important defense mechanism for traction power supply system (TPSS), and the reliability of its operation could affect the normal operation of the system. Therefore, in order to maintain the system in safe operation, it is of great importance to quantify the influence of protection scheme on traction power supply system. This paper presents a risk assessment method for traction power supply system considering the reliability of system protection. A risk probability model for system protection is established. Based on Markovian state-space method, the reliability of the protection system is evaluated; the misoperations of the protection system and their possible consequences are analyzed by FMEA method. Three types of economic loss indices are defined to establish the quantitative risk consequence model; the risk of traction power supply system is thereby quantified by integrating risk probability and risk consequence. Practical traction power supply system is taken as an example to prove the effectiveness of the proposed method. The evaluation results can help formulate corresponding measures, and provide guidance for maintenance strategies, thus reducing system risk.","PeriodicalId":142445,"journal":{"name":"2018 IEEE/IAS 54th Industrial and Commercial Power Systems Technical Conference (I&CPS)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125949502","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

Transformer radiators in offshore installations: Building the case for galvanized radiators 海上变压器散热器:镀锌散热器外壳的制作

2018 IEEE/IAS 54th Industrial and Commercial Power Systems Technical Conference (I&CPS) Pub Date : 2018-05-01 DOI: 10.1109/ICPS.2018.8369986

R. A. Awad

引用次数: 0

Application of UPQC for power quality improvement in induction furnace UPQC在感应电炉电能质量改进中的应用

2018 IEEE/IAS 54th Industrial and Commercial Power Systems Technical Conference (I&CPS) Pub Date : 2018-05-01 DOI: 10.1109/ICPS.2018.8369987

Tejinder Singh Saggu, L. Singh, Balbir Gill

引用次数: 3

On the de-energization of over-head low-voltage lines under high-impedance fault conditions 高阻抗故障条件下架空低压线路的断电问题研究

2018 IEEE/IAS 54th Industrial and Commercial Power Systems Technical Conference (I&CPS) Pub Date : 2018-05-01 DOI: 10.1109/ICPS.2018.8370005

Massimo Mitolo, G. Zizzo, R. Musca

{"title":"On the de-energization of over-head low-voltage lines under high-impedance fault conditions","authors":"Massimo Mitolo, G. Zizzo, R. Musca","doi":"10.1109/ICPS.2018.8370005","DOIUrl":"https://doi.org/10.1109/ICPS.2018.8370005","url":null,"abstract":"Downed distribution conductors in overhead distribution systems, may not be a concern for equipment, but greatly challenge the safety of persons, as well as the integrity of properties. Upstream overcurrent protective devices may not be able to detect the magnitudes of fault currents resulting from these high-impedance faults. Even though protective devices capable to detect such faults have been available on the market, not all the utilities have equipped their stations with these products, likely due to the costs. In this paper, the authors formalize the problem, and propose a possible cost-effective solution for the low-voltage over-head lines with neutral wire. Such solution includes a metal hook underneath the line conductors, supported by the pole, and connected to the neutral wire. This arrangement would cause a line-to-neutral short circuit, positively activating existing over-current devices, which can therefore disconnect the supply. Costs and possible safety issues for workers related to the installation of the device to existing overhead lines are herein also delineated.","PeriodicalId":142445,"journal":{"name":"2018 IEEE/IAS 54th Industrial and Commercial Power Systems Technical Conference (I&CPS)","volume":"89 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129040517","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

Optimal incentive-based demand response management of smart households 基于激励的智能家庭最优需求响应管理

2018 IEEE/IAS 54th Industrial and Commercial Power Systems Technical Conference (I&CPS) Pub Date : 2018-05-01 DOI: 10.1109/ICPS.2018.8369971

Hossein Mohammadi Ruzbahani, H. Karimipour

{"title":"Optimal incentive-based demand response management of smart households","authors":"Hossein Mohammadi Ruzbahani, H. Karimipour","doi":"10.1109/ICPS.2018.8369971","DOIUrl":"https://doi.org/10.1109/ICPS.2018.8369971","url":null,"abstract":"Nowadays, the emerging smart grid technology opens up the possibility of two-way communication between customers and energy utilities. Demand response (DR) management offers the promise of saving money for commercial customers and households while helps utilities operate more efficiently. In this paper, an incentive-based DR optimization (IDRO) model is proposed to efficiently schedule household appliances for minimum usage during peak hours. Proposed method is a multi-objective optimization technique combined with Regression Analysis (RA) which is flexible and scalable. In exchange for a discount on electricity prices while minimizing the customer's welfare, the proposed IDRO algorithm coordinates all the monitored and enrolled household appliances for a better use of electricity energy. It is a cost-effective method where a data acquisition device with only one single minimal set of voltage and current sensors is required. Proposed method is tested and verified using 300 case studies (household). Data analysis for a period of one year shows up to %15 power factor improvement, up to %15 cost saving and 5 Kw/h usage reduction during peak hours for individual households.","PeriodicalId":142445,"journal":{"name":"2018 IEEE/IAS 54th Industrial and Commercial Power Systems Technical Conference (I&CPS)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125545934","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