检索结果-内蒙古大学图书馆

synchronous generator Loss of Field protection: A Real-Time Realistic Framework and Assessment of Some Recently Proposed Methods

引用

IEEE TRANSACTIONS ON POWER DELIVERY 2019年第3期34卷 971-979页

作者： Hasani, Abbas Haghjoo, Farhad da Silva, Filipe Faria Bak, Claus Leth Shahid Beheshti Univ Abbaspour Sch Engn Dept Elect Engn Tehran *** Iran Aalborg Univ Dept Energy Technol DK-9220 Aalborg Denmark

Areal-time realistic framework for synchronous generator loss of field (LOF) protection studies is suggested in this paper by using the real-time digital simulator, which allows the user to realistically model the generator field supply circuit. By using such framework, the performance of LOF protection algorithms can be comprehensively evaluated in the face of the various LOF events including the short circuit and two types of the open circuit events, while the open circuit occurrence cannot be studied in the conventional simulation programs. The obtained results demonstrate that the generator dynamics are significantly different in the face of various LOF failures and then all of them must be regarded to develop the new LOF protection algorithms. By using the suggested framework, the performance of some recently proposed schemes along with the conventional impedance and the admittance relays are comprehensively evaluated. The obtained results from applying the various LOF failures show that, against the conventional relays, the new schemes cannot detect all types of LOF failures and so, they do not have enough reliability.

关键词： synchronous generator protection loss of field excitation system real-time-digital-simulator (RTDS)

来源：评论

学校读者我要写书评

暂无评论

Practical Implementation and Testing of RNN Based synchronous generator Internal-Fault protection

引用

RECENT ADVANCES IN ELECTRICAL & ELECTRONIC ENGINEERING 2019年第2期12卷 181-189页

作者： Saced, Mohammed Ahmed El-Saadawi, Magdi Mansoura Univ Fac Engn Dept Elect Engn Mansoura Egypt

Background: Differential relay is normally used to detect faults in synchronous generator (SG) stator windings. Nevertheless, detection of ground fault depends on the generator grounding type. For high impedance grounding, the ground faults near the neutral terminal of the stator windings are not detectable by the differential relay. So, the ability to identity the internal fault of SG is a very important task for stable and safe operation of power systems. Methods: Accurate algorithms for fault detection and classification based on Recurrent Neural Network (RNN) are suggested in this paper. RNNs are trained using different data available from SG MATLAB/SIMULINK model. Simulation of different fault scenarios based on LabVIEW (TM) program is discussed. The studied fault scenarios include;fault type, location, resistance and fault inception angle. The RNN based algorithm is experimentally tested using an actual SG. Practical design and implementation of the proposed fault detector and classifier are presented. The hardware system is designed and built to acquire the currents at both ends of SG terminals. Results: The presented results confirm the effectiveness of the proposed algorithm to detect minor ground faults near the neutral terminal (less than 5% of stator winding). Conclusion: The experimental analysis shows that the proposed RNN detects and classifies the internal faults correctly, fastly and remain stable after the faults occur.

关键词： Recurrent Neural Network (RNN) synchronous generator protection internal fault fault detector fault classifier RNN

来源：评论

学校读者我要写书评

暂无评论

Loss of Field protection of synchronous generator in a Realistic Framework using RTDS

Loss of Field Protection of Synchronous Generator in a Reali...

引用

IEEE International Conference on Environment and Electrical Engineering (EEEIC) / IEEE Industrial and Commercial Power Systems Europe (ICPS Europe)

作者： Hasani, Abbas Haghjoo, Farhad da Silva, Filipe Faria Bak, Claus Leth Shahid Beheshti Univ Dept Elect Engn Tehran Iran Aalborg Univ Dept Energy Technol Aalborg Denmark

ISBN: (纸本)9781538651865

This paper suggests an appropriate framework for synchronous generator loss of field (LOF) protection studies by using RSCAD software incorporated with real-time digital simulator (RTDS). A single machine system is modeled in RSCAD environment and LOF studies are done precisely on it. Various types of LOF events, including short circuit and open circuit with crowbar or surge-arrester activation, which cannot be studied in common kinds of power system software, are investigated. The obtained results demonstrate that the generator dynamics differ in the face of various LOF failures. Therefore, the effectiveness of the mentioned framework for LOF protection studies becomes clear.

关键词： synchronous generator protection Excitation system Loss of field Real-time-digital-simulator

来源：评论

学校读者我要写书评

暂无评论

Pattern Classification based Intelligent Numerical protection of Salient-pole synchronous generator using Neural Networks

引用

JOURNAL OF ELECTRICAL SYSTEMS 2013年第1期9卷 125-136页

作者： Sinha, Amrita Vishwakarma, D. N. Natl Inst Technol Dept Elect Engg Patna 800005 Bihar India Banaras Hindu Univ Inst Technol Dept Elect Engn Varanasi 221005 Uttar Pradesh India

This paper presents the application of neural networks for the non-differential protection of salient-pole synchronous generator against internal faults in any winding of the stator. The direct phase quantities and modified winding function approach has been used to simulate different types of internal and external faults using electrical parameters of generators installed by utilities. The cases of all the possible types of internal faults in the stator winding have been taken into consideration in designing the protection scheme. Multi-layer Feed-forward Neural Network (MFNN) and Radial Basis Function Neural Network (RBFNN) have been trained and tested for detection, identification and classification of the internal faults based on pattern classification. The simulated fault currents in the phases as well as their parallel paths at the terminal end have been used for training and testing of both the proposed neural networks. Both the networks are able to identify the fault signal correctly but the MFNN is more reliable, more accurate and faster than RBFNN in detection and classification of the fault.

关键词： synchronous generator protection Artificial Neural Network Multi-Layer Feed-Forward Network Radial Basis Function Neural Network Pattern classification.

来源：评论

学校读者我要写书评

暂无评论

Loss of Field protection of synchronous generator in a Realistic Framework using RTDS

Loss of Field Protection of Synchronous Generator in a Reali...

引用

IEEE International Conference on Environment and Electrical Engineering

作者： Abbas Hasani Farhad Haghjoo Filipe Faria da Silva Claus Leth Bak Department of Electrical Engineering Shahid Beheshti University Tehran Iran Department of Energy Technology Aalborg University Aalborg Denmark

关键词： synchronous generator protection Excitation system Loss of field Real-time-digital-simulator

来源：评论

学校读者我要写书评

暂无评论

generator Out-of-Step Prediction Based on Faster-Than-Real-Time Analysis: Concepts and Applications

引用

IEEE TRANSACTIONS ON POWER SYSTEMS 2018年第4期33卷 4563-4573页

作者： Abedini, Moein Davarpanah, Mahdi Sanaye-Pasand, Majid Hashemi, Sayyed Mohammad Iravani, Reza Univ Tehran Sch Elect & Comp Engn Coll Engn Tehran *** Iran Univ Toronto Dept Elect & Comp Engn Toronto ON M5S 3G4 Canada

This paper introduces a new approach, based on faster-than-real-time (FTRT) analysis, to predict out-of-step (OOS) condition of a turbine-generator (T-G) unit subsequent to a fault scenario. The proposed FTRT analysis is based on 1) solving a state-space model of the T-G electromechanical system and corresponding controllers without the need for online measurements, and 2) an estimated Thevenin equivalent of the rest of the power system. The measurement-free FTRT analysis is carried out after the Thevenin parameters are estimated subsequent to the fault clearance instant. Equal area criterion is applied on the predicated variables to detect OOS condition. A reliable decision can be made based on this approach, since it does not involve simplifying assumptions contrary to the existing approaches. The FTRT approach accurately considers the impacts of the detailed model of the generator, automatic voltage regulator, prime mover, governor system, and the host power system. This paper provides detailed mathematical formulation for the proposed OOS detection method and verifies its feasibility and accuracy based on single machine and large test systems. The proposed approach is also implemented on an industrial platform and evaluated. The results confirm that the proposed approach can accurately identify OOS conditions, earlier than the rotor angle noticeably increases.

关键词： Faster-than-real-time out-of-step state-space equations synchronous generator protection transient stability

来源：评论

学校读者我要写书评

暂无评论

An Analytical Approach to Detect generator Loss of Excitation Based on Internal Voltage Calculation

引用

IEEE TRANSACTIONS ON POWER DELIVERY 2017年第5期32卷 2329-2338页

作者： Abedini, Moein Sanaye-Pasand, Majid Davarpanah, Mahdi Univ Tehran Coll Engn Sch Elect & Comp Engn Tehran *** Iran

The excitation system of a synchronous generator has a major role in proper operation and control of the generator. Loss of excitation (LOE) may cause harmful effects on the both generator and power system. This paper presents a new approach to detect LOE based on calculating the synchronous generator internal voltage. This parameter is considerably sensitive to LOE and can be used as a straightforward index to discriminate LOE events from system disturbances more quickly and robustly than the conventional indices. A novel and practical technique with minimum computational burden is presented to calculate the generator internal voltage. To evaluate the proposed algorithm, LOE events in a multimachine test system are investigated. In addition, the proposed approach is experimentally evaluated on a 10 kVA synchronous generator. Performed studies demonstrate that the proposed strategy not only noticeably decreases the LOE relay operation time, but also desensitizes its maloperation to system disturbances.

关键词： generator internal voltage loss of excitation (LOE) synchronous generator protection

来源：评论

学校读者我要写书评

暂无评论

A wavelet-based approach for protection of generators against unbalanced currents

引用

ELECTRIC POWER SYSTEMS RESEARCH 2002年第1期63卷 73-80页

作者： Youssef, OAS Suez Canal Univ Fac Ind Educ Cairo 11351 Egypt

This paper presents a new wavelet-based negative-phase sequence (unbalanced currents) protection scheme for synchronous generators. The scheme utilizes the three line voltages and the three line currents available at the generator terminals. Wavelet transform concept is presented. The principle of operation of the algorithm is introduced. Feature extraction technique is derived. Data window necessary for the algorithm is ten samples based on 1200 Hz sampling frequency. Generated data from the simulation of a model power system using EMTP were used in the MATLAB software to test the performance of the technique. The performance under different system conditions is discussed. The results show that the new approach provides robust and accurate classification for a variety of power system conditions. (C) 2002 Elsevier Science B.V. All rights reserved.

关键词： negative sequence synchronous generator protection wavelet transforms digital relaying stator protection microprocessor relaying

来源：评论

学校读者我要写书评

暂无评论

A Secure and Setting-Free Technique to Detect Loss of Field in synchronous generators

引用

IEEE TRANSACTIONS ON ENERGY CONVERSION 2017年第4期32卷 1512-1522页

作者： Hasani, Abbas Haghjoo, Farhad Shahid Beheshti Univ Abbaspour Sch Engn Dept Elect Engn Tehran *** Iran

Loss-of-field (LOF) phenomenon in synchronous generators may cause equipment damage and voltage drop in the power system, which can be terminated to a blackout. Conventional schemes, which detect LOF on the basis of the measured impedance from the generator terminal viewpoint, have some major drawbacks such as low speed, complicated setting procedure, and unsecure performance in the face of similar phenomena, e. g., stable power swing. In this paper, different electrical quantities of the generator including terminal voltage (V), current (I), active (P) and reactive power (Q), and power angle (Omega) variations are studied to achieve a secure technique for LOF protection in synchronous generators. Comprehensive studies show that a simple criterion based on polarities of V, Q, and d variations is accessible to achieve this goal, which does not need a complicated procedure to set it. To evaluate the performance of the proposed algorithm, some cases are simulated on sample power systems under various operating conditions. Also, superiority of the proposed algorithm in comparison with the other schemes is proven by the obtained results, as well. Moreover, the proposed technique is experimentally tested by using some 2-kVA laboratory generators to detect LOF.

关键词： synchronous generator protection loss of field stable power swing

来源：评论

学校读者我要写书评

暂无评论

A Belief-Desire-Intention Multi-agent Architecture for Efficient Power Plant Disturbance Analysis

引用

JOURNAL OF CONTROL AUTOMATION AND ELECTRICAL SYSTEMS 2018年第3期29卷 381-390页

作者： Pesente, Jonas Herbig, Gustavo Moreto, Miguel Ramos, Rodrigo A. Itaipu Binacl Foz Do Iguacu Brazil Itaipu Technol Pk Foz Do Iguacu Brazil Univ Fed Santa Catarina Florianopolis SC Brazil Univ Sao Paulo Sao Paulo Brazil

The amount of data produced in power system monitoring networks continues to grow indistinctly, specially in the context of smart grids, demanding new frameworks to extract information of the databases. Given the increasing number of propositions of multi-agent systems (MAS) for smart grids control, operation and restoration, these frameworks must be compatible with agent concepts. Although multi-agent systems for processing oscillographic data have been proposed, no proper method was developed to demonstrate computational benefits in the case of high volume of data. In order to address this matter, this paper proposes a set of guidelines for the development of MAS. Based on the proposed architecture, a prototype was developed, and a set of tests were performed on the oscillographic database of the Itaipu power plant, which includes the evaluation of oscillography classification accuracy, the analysis of parallel processing and the automatic analysis of a set of real disturbances. The results showed that the architecture is suitable for disturbance analysis automation, fulfilling the functional requirements and reducing processing time when compared with single thread computation.

关键词： Disturbance analysis synchronous generator protection Multi-agent systems

来源：评论

学校读者我要写书评

暂无评论

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案：

请选择收藏分类：

通借通还

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：