2011 International Conference on Advanced Power System Automation and Protection最新文献

Matlab-based voltage stability analysis toolbox and its validity check 基于matlab的电压稳定性分析工具箱及其有效性检验

2011 International Conference on Advanced Power System Automation and Protection Pub Date : 2011-11-07 DOI: 10.1109/EPEC.2011.6070205

Yanfang Wei, Zhi-nong Wei, Guo-qiang Sun

引用次数: 1

Coordination of overcurrent and distance relays using hybrid Particle Swarm Optimization 基于混合粒子群算法的过流继电器和距离继电器协调

2011 International Conference on Advanced Power System Automation and Protection Pub Date : 2011-10-16 DOI: 10.1109/APAP.2011.6180975

J. Sadeh, Vahid Amintojjar, M. Bashir

引用次数: 22

Analysis of the sympathetic tripping problem for networks with high penetrations of Distributed Generation 分布式发电高渗透网络的交感跳闸问题分析

2011 International Conference on Advanced Power System Automation and Protection Pub Date : 2011-10-16 DOI: 10.1109/APAP.2011.6180432

K. Jennett, C. Booth, Martin Lee

引用次数: 14

Protection of grid connected photovoltaic system during voltage sag 并网光伏系统电压暂降时的保护

2011 International Conference on Advanced Power System Automation and Protection Pub Date : 2011-10-16 DOI: 10.1109/APAP.2011.6180769

M. Taghizadeh, J. Sadeh, E. Kamyab

{"title":"Protection of grid connected photovoltaic system during voltage sag","authors":"M. Taghizadeh, J. Sadeh, E. Kamyab","doi":"10.1109/APAP.2011.6180769","DOIUrl":"https://doi.org/10.1109/APAP.2011.6180769","url":null,"abstract":"The grid-connected power electronic inverters are highly sensitive to grid disturbances and it is important to emphasize the necessity to reduce the effects of voltage disturbances on their operation. Among the wide range of power quality disturbances, voltage sags severely affect the performance of voltage source converters (VSC) operation of distributed generation (DG) units. In this paper, small signal model of photovoltaic, DC-DC boost converter and inverter are simulated in Matlab simulink software. The photovoltaic system is connected to a 20kV distribution feeder via a transformer. It can be seen if the voltage sag is happened in the system, the inverter switch current will be increased significantly. In order to protect the power electronic converters' switches during a voltage sag and increase the voltage sag ride through capability, use of fault current limiter (FCL), is proposed. It is shown that if the voltage sag happened with duration of half to thirty cycles, FCL limits the current of power electronic switches. So, the photovoltaic system although is kept connecting with grid during the voltage sag condition, the power electronic switches aren't harmed and have normal current during voltage sag duration.","PeriodicalId":435652,"journal":{"name":"2011 International Conference on Advanced Power System Automation and Protection","volume":"95 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-10-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132658752","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: 13

Fault indicator allocation in power distribution network for improving reliability and fault section estimation 为提高可靠性和故障区段估计而进行的配电网故障指示器分配

2011 International Conference on Advanced Power System Automation and Protection Pub Date : 2011-10-16 DOI: 10.1109/APAP.2011.6180595

R. Dashti, J. Sadeh

引用次数: 19

Effect of monitoring and self-checking tests effectiveness index of back-up protection system on the optimum routine and self-checking test intervals of protection system 后备保护系统监测和自检试验效能指标对保护系统最佳常规和自检试验间隔的影响

2011 International Conference on Advanced Power System Automation and Protection Pub Date : 2011-10-16 DOI: 10.1109/APAP.2011.6180591

Y. Damchi, J. Sadeh

{"title":"Effect of monitoring and self-checking tests effectiveness index of back-up protection system on the optimum routine and self-checking test intervals of protection system","authors":"Y. Damchi, J. Sadeh","doi":"10.1109/APAP.2011.6180591","DOIUrl":"https://doi.org/10.1109/APAP.2011.6180591","url":null,"abstract":"In order to maximize the availability of protection system and minimize the risk of mal-operation, usually protective relay test carry out in power electrical industry. Determination of precise optimum routine test and self-checking intervals plays a vital role in decrease of maintenance and reparation cost of protective system. Self-checking and monitoring facilities increase the reliability and optimum routine test interval of a protection system. Modern digital relays are equipped by self-checking and monitoring tests in addition to routine test however, electromagnetic and static relays are just equipped by routine test. In the previous studies, the back-up protection system is assumed to be perfectly reliable for reliability analysis. This assumption is not correct in the operation because back-up relay has the same structure on the primary relay, so back-up relay can also has mal-trip when not required and may fail to trip when required which may cause power system blackout due to cascading failure. Therefore, In this paper, an extend Markov model is proposed for reliability analysis when back-up relay is not perfectly reliable considering self-checking and monitoring facilities in the protective system. Results show that, the optimum routine and self-checking tests interval of protection system increase significantly by increasing of monitoring and self-checking tests effectiveness of back-up protection system.","PeriodicalId":435652,"journal":{"name":"2011 International Conference on Advanced Power System Automation and Protection","volume":"361 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-10-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126696815","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

Optimal coordination of directional overcurrent relays in a microgrid system using a hybrid particle swarm optimization 基于混合粒子群算法的微电网定向过流继电器优化协调

2011 International Conference on Advanced Power System Automation and Protection Pub Date : 2011-10-16 DOI: 10.1109/APAP.2011.6180976

Y. Damchi, H. R. Mashhadi, J. Sadeh, M. Bashir

{"title":"Optimal coordination of directional overcurrent relays in a microgrid system using a hybrid particle swarm optimization","authors":"Y. Damchi, H. R. Mashhadi, J. Sadeh, M. Bashir","doi":"10.1109/APAP.2011.6180976","DOIUrl":"https://doi.org/10.1109/APAP.2011.6180976","url":null,"abstract":"Recently, microgrid operation increased significantly with increasing distributed renewable energy resources in the power system. Microgrids can operate with and without utility. Fault currents are significantly different in island and utility connected operation modes. Therefore, microgrid protection is one of the important subjects in microgrid operation. In this paper, a hybrid particle swarm optimization (HPSO) approach has been developed for coordination of directional overcurrent relays (DOCRs) in a microgrid system. The coordination constraints include the utility connected and an autonomous condition of the microgrid operation. In the optimization procedure, the current setting (Iset) of relays is considered as discrete parameters and time multiplier settings (TMS) is assumed as continues parameter. The proposed algorithm has two parts, in the first part, PSO is used to calculate the Iset and in the second part, linear programming is applied to calculate the TMS of each relay. In the case study, loads connected to the network are divided into critical and noncritical ones. In normal operation of the system, distributed generators (DGs) operate in parallel with the utility. When a fault occurs on the utility side, noncritical loads are disconnected from the network and DGs are operated in microgrid as islanded mode. Regarding to simulation results, DOCRs have a suitable and reliable operation in both conditions of microgrid operations. In addition, overall operating time of the primary relays is properly minimized.","PeriodicalId":435652,"journal":{"name":"2011 International Conference on Advanced Power System Automation and Protection","volume":"15 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-10-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133587468","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: 31

A new method to prevent distance protection from operating due to power swing 一种防止距离保护因功率摆动而失效的新方法

2011 International Conference on Advanced Power System Automation and Protection Pub Date : 2011-10-16 DOI: 10.1109/APAP.2011.6180736

A. Pahlevan, J. Sadeh

引用次数: 2

Faulted phase selection function based upon impedance comparison in a distance protection relay 基于阻抗比较的距离保护继电器故障选相功能

2011 International Conference on Advanced Power System Automation and Protection Pub Date : 2011-10-01 DOI: 10.1109/APAP.2011.6180365

Takuya Utsumi, T. Nakatsuka, H. Takani, H. Amoh, F. Kawano, P. Beaumont

{"title":"Faulted phase selection function based upon impedance comparison in a distance protection relay","authors":"Takuya Utsumi, T. Nakatsuka, H. Takani, H. Amoh, F. Kawano, P. Beaumont","doi":"10.1109/APAP.2011.6180365","DOIUrl":"https://doi.org/10.1109/APAP.2011.6180365","url":null,"abstract":"The distance protection relay is widely used around the world for the protection of transmission and distribution networks and it is especially essential in its application within bulk power systems. The faulted phase and the fault point on the power line must be determined by the relay with great certainty. In this paper, we propose a unique method to enhance the faulted phase selection function that uses impedance. In this method, an impedance comparison technique, the faulted phase is determined by identifying the minimum of the phase-to-phase impedances based upon the rule that a phase-to-phase fault impedance becomes a minimum for two-phase faults. In order to demonstrate the validity of the new technique, both the conventional method (voltage comparison method) and the proposed method are evaluated in detail for various test cases utilizing Toshiba distance protection relays, GRZ100 and a Real Time Digital Simulator (RTDS). These test cases include evolving faults to other phases and cross-country faults involving parallel double circuit transmission lines. The results show that the conventional method does not always have sufficient capability to discriminate the faulted phase correctly for the cross-country fault cases which have no healthy phases, on the other hand, the impedance comparison method demonstrates superior performance for all of the test cases. The proposed impedance comparison method is shown to be a promising method to enhance the faulted phase selection function for the distance protection relay and has been put to practical use successfully.","PeriodicalId":435652,"journal":{"name":"2011 International Conference on Advanced Power System Automation and Protection","volume":"64 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":"115147090","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

Fault identification algorithm applied in regional backup protection based on fault condition set 基于故障条件集的区域备份保护故障识别算法

2011 International Conference on Advanced Power System Automation and Protection Pub Date : 2011-10-01 DOI: 10.1109/APAP.2011.6180776

Xianguo Jiang, Zengping Wang, Chen Li

引用次数: 3