2011 International Conference on Advanced Power System Automation and Protection最新文献_第5页

Investigation of protection schemes for high penetration rooftop photovoltaic system 高穿透度屋顶光伏系统防护方案研究

2011 International Conference on Advanced Power System Automation and Protection Pub Date : 2011-10-01 DOI: 10.1109/APAP.2011.6180579

Bin Li, Hongling Wu, Xiaofei Gao

{"title":"Investigation of protection schemes for high penetration rooftop photovoltaic system","authors":"Bin Li, Hongling Wu, Xiaofei Gao","doi":"10.1109/APAP.2011.6180579","DOIUrl":"https://doi.org/10.1109/APAP.2011.6180579","url":null,"abstract":"As a clean and renewable source of energy and can be used easily and widely in the future, photovoltaic is one of the most important distributed generations in micro-grid. The deployment of high penetration rooftop photovoltaic (PV) system is becoming a reality in micro-grid. Developing high penetration rooftop PV system in an effective manner is a great challenge. The paper analyzes the characteristics of high penetration rooftop PV system and proposes protection schemes according to the requirements. As the operation of micro-grid is flexible, micro-grid could operate not only in radial or open loop configurations, but also in closed loop configurations according to the security and the reliability requirements. This paper investigates the protection requirements of high penetration rooftop PV system and analyzes the characteristics of conventional protection schemes applied to high penetration rooftop PV system. Obviously, the pilot protection can fulfill the requirements of high penetration rooftop PV system. Taking the fault clearance speeds and the requirement of directional element into account, the paper proposes protection scheme based on overcurrent coordination for high penetration rooftop PV system. The proposed protection schemes show that it can clear the fault instantaneously and significantly improve the reliability and security of high penetration PV system.","PeriodicalId":435652,"journal":{"name":"2011 International Conference on Advanced Power System Automation and Protection","volume":"119 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126879357","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: 4

Feasible region of under-frequency load shedding and its application 低频减载可行区域及其应用

2011 International Conference on Advanced Power System Automation and Protection Pub Date : 2011-10-01 DOI: 10.1109/APAP.2011.6180364

Tao Mu, Zhen Wei, ChengHu Gong, Zhigang Huang

{"title":"Feasible region of under-frequency load shedding and its application","authors":"Tao Mu, Zhen Wei, ChengHu Gong, Zhigang Huang","doi":"10.1109/APAP.2011.6180364","DOIUrl":"https://doi.org/10.1109/APAP.2011.6180364","url":null,"abstract":"Under-frequency load shedding (UFLS) is an effective way of reducing the imbalance between generation and load before the system frequency falls under the minimum allowable value. However, the load shed during the UFLS procedure may sometimes be insufficient or excess for system frequency to recover. This paper introduces the concept of the feasible region of UFLS (FROUFLS) which could force the perturbed system to a new equilibrium state with acceptable frequency. The proposed FROUFLS is composed of upper boundary and lower boundary for each stage of UFLS. The upper boundary of stage (UBOS) is the maximum percentage of load, which guarantees system frequency will not exceed the maximum allowable value. The lower boundary of stage (LBOS) is the minimum percentage of load, which guarantees the system frequency will not be under the minimum allowable value. The FROUFLS varies with the load on different feeders. It can be employed in monitoring the feasibility of an UFLS program. Evaluations for the FROUFLS in a power system in north China are described in detail to demonstrate the effectiveness of the FROUFLS.","PeriodicalId":435652,"journal":{"name":"2011 International Conference on Advanced Power System Automation and Protection","volume":"163 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123833146","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

Protection device of high-voltage explosion-proof switch based on IEC 61850 基于IEC 61850的高压防爆开关保护装置

2011 International Conference on Advanced Power System Automation and Protection Pub Date : 2011-10-01 DOI: 10.1109/APAP.2011.6180710

Wenjun Ma, Longhua Mu, W. Zhuang, Ying Han

引用次数: 0

The feasibility analysis of partial discharge location of XLPE cables based on traveling waves fault location technology 基于行波故障定位技术的交联聚乙烯电缆局部放电定位的可行性分析

2011 International Conference on Advanced Power System Automation and Protection Pub Date : 2011-10-01 DOI: 10.1109/APAP.2011.6180642

Yongzhi Su, Yongduan Xue, Bingyin Xu, Liu Dong

引用次数: 1

Effects of location, size and number of wind turbine receptors on blade lightning protection by voltage distribution analysis 通过电压分布分析风力机感受器位置、大小和数量对叶片防雷的影响

2011 International Conference on Advanced Power System Automation and Protection Pub Date : 2011-10-01 DOI: 10.1109/APAP.2011.6180587

H. Bagherian, H. Kazemi Karegar

{"title":"Effects of location, size and number of wind turbine receptors on blade lightning protection by voltage distribution analysis","authors":"H. Bagherian, H. Kazemi Karegar","doi":"10.1109/APAP.2011.6180587","DOIUrl":"https://doi.org/10.1109/APAP.2011.6180587","url":null,"abstract":"Electric and magnetic fields generated by lightning cause a serious hazard to various systems. Nowadays, wind turbine installations with higher power capacity are increasing. Higher capacity requires higher height and so there is more probability of lightning strike. Blades are the most probable components to get struck by lightning. The most common lightning protection system for the blades consists of several metallic receptors on the blade's surface. Those are connected to the ground by metallic down-conductors placed inside the blade shell. In this paper, the influence of the receptors' configurations in protecting the blade against lightning strike is studied. For this purpose, an analysis procedure based on Finite Element Method (FEM) in COMSOL Multiphysics software environment is used. The voltage distribution around the blade is studied and simulated for various configurations of receptors. The obtained results are considered and the best configuration is investigated. The simulations are done on the blade model of a special wind turbine, which is “Vestas V47”.","PeriodicalId":435652,"journal":{"name":"2011 International Conference on Advanced Power System Automation and Protection","volume":"97 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124184191","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

Islanding detection for a micro-grid based on the active and reactive power in the time domain 基于时域有功和无功功率的微电网孤岛检测

2011 International Conference on Advanced Power System Automation and Protection Pub Date : 2011-10-01 DOI: 10.1109/APAP.2011.6180681

Young-Gui Lee, Hyewon Lee, Yeon-Hee Kim, T. Zheng, Y. Kang

引用次数: 6

Electromagnetic forces densities for 3 phase busbar parallel connected to rectifier load 与整流负载并联的三相母线的电磁力密度

2011 International Conference on Advanced Power System Automation and Protection Pub Date : 2011-10-01 DOI: 10.1109/APAP.2011.6180367

M. Abd-El-Aziz, M. Nashed, A. Adly, E. Abou-El-Zahab

引用次数: 1

The realization of a novel control of Doubly-Fed Induction Generator by using rotor current 介绍了一种利用转子电流实现双馈感应发电机控制的新方法

2011 International Conference on Advanced Power System Automation and Protection Pub Date : 2011-10-01 DOI: 10.1109/APAP.2011.6180768

Chang Li-Ren, Lin Yu-Sheng, Cho Ru, Fan Pin-Lin, Y. Jun-zhe, Yu Chi-Shan

引用次数: 1

Prediction of gases content dissolved in power transformer oil based on gene expression programming 基于基因表达式编程的电力变压器油中溶解气体含量预测

2011 International Conference on Advanced Power System Automation and Protection Pub Date : 2011-10-01 DOI: 10.1109/APAP.2011.6180978

ZiBin Hu, Yongli Zhu, Zhuo Dong, H. Li

引用次数: 2

A novel direct power control strategy of double hysteresis and multiple switching tables for rectifiers 一种新的整流器双迟滞多开关表直接功率控制策略

2011 International Conference on Advanced Power System Automation and Protection Pub Date : 2011-10-01 DOI: 10.1109/APAP.2011.6180381

Jingjing Huang, Aimin Zhang, Xiaoju Chen, Hang Zhang, Jianhua Wang

{"title":"A novel direct power control strategy of double hysteresis and multiple switching tables for rectifiers","authors":"Jingjing Huang, Aimin Zhang, Xiaoju Chen, Hang Zhang, Jianhua Wang","doi":"10.1109/APAP.2011.6180381","DOIUrl":"https://doi.org/10.1109/APAP.2011.6180381","url":null,"abstract":"In order to alleviate the problems, such as the periodic fluctuations of reactive power, the poor quality of ac current and the long steady-state response time, caused by the traditional direct power control(DPC) in three-phase voltage source (Pulse Width Modulation)PWM rectifier, a novel DPC strategy of double hysteresis comparator bands and multiple switching tables (DM-DPC) is put forward in this paper. According to the instantaneous errors between the commanded and estimated active and reactive power, the different switching table and hysteresis comparator band are selected in the new strategy. The effect intensity table, which is used to increase/decrease active and reactive powers through switching state vectors in different sector, is summarized. Based on the effect intensity table, four switching tables are provided. The simulation model is constructed to compare the results obtained from both the proposed and the traditional direct power control strategy. The simulation results show that, by using the novel scheme, not only the reactive power becomes more stable, but the ac current harmonic total distortion rate (THD) and the time that the system takes to reach the steady-state are also reduced to 33.5%, 62.5% of the classical one respectively.","PeriodicalId":435652,"journal":{"name":"2011 International Conference on Advanced Power System Automation and Protection","volume":"82 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126477681","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