检索结果-内蒙古大学图书馆

IEEE PES power systems Conference and Exposition, PSCE

作者： Sheng Li Jianhua Zhang Guohua Zhang Jingfu Shang Mingxia Zhou Yinhui Li Key Laboratory of Power System Protection and Dynamic Security Monitoring and Control under Ministry of Education North China Electric Power University Beijing China

This paper design an integrative ancillary fuzzy logic controller for the Voltage Source Converter based HVDC transmission system, VSC-HVDC, to improve the stability of the AC/ DC system by damping the oscillation effectively after disturbance. The fast control capability of the VSC-HVDC and the process of area mode oscillations are analyzed. No detailed model of the system is required for the design of the proposed control scheme. The controller judges the operation states and the control effect and synthetically adjusts its active power and reactive power order in an adaptive way by using fuzzy rules, so as to damp out the area mode oscillation. An IEEE 4-generator AC/DC power system is built in PSCAD. Integrative ancillary fuzzy logic controllers is designed in Matlab and interfaced with PSCAD. Simulation results have shown that the integrative controller can enhance the dynamic stability of interconnected power systems effectively and is robust to the variation of system operating conditions and oscillation modes.

关键词： Fuzzy logic Damping PSCAD Converters power conversion power system stability power system interconnection power system simulation power system dynamics Robust stability

来源：评论

学校读者我要写书评

暂无评论

Fault Detection Based on Data Mining Theory

Fault Detection Based on Data Mining Theory

引用

International Workshop on Intelligent systems and Applications, ISA

作者： Yagang Zhang Jinfang Zhang Jing Ma Zengping Wang Key Laboratory of Power System Protection and Dynamic Security Monitoring and Control under Ministry of Education North China Electric Power University Baoding China

In this paper, we adopt a novel applied approach to fault detection based on data mining theory. In our researches, global information will be introduced into the electric power system, we are using mainly cluster analysis technology of data mining theory to resolve fast and exact discrimination of faulty components and faulty sections, and finally accomplish fault detection in electric power systems. Data mining theory is defined as the process of automatically extracting valid, novel, potentially useful and ultimately comprehensive information from large databases. It has been widely utilized in both academic and applied scientific researches in which the data sets are generated by experiments. Data mining theory will contribute a lot in the study of fault detection.

关键词： Fault detection Data mining Data analysis Electrical fault detection Visual databases Information analysis monitoring Instruments Fault diagnosis power system reliability

来源：评论

学校读者我要写书评

暂无评论

Simulation recurrence of a realistic DC line fault based on RTDS and its simulation reliability analysis

Simulation recurrence of a realistic DC line fault based on ...

引用

IEEE PES power systems Conference and Exposition, PSCE

作者： Xudong Jia Gengyin Li Chengyong Zhao Xiangning Xiao Key Laboratory of Power System Protection and Dynamic Security Monitoring and Control under Ministry of Education North China Electric Power University Beijing China

In this paper, the equivalent model of a local HVDC transmission system is set up based on Real-Time Digital Simulator (RTDS). A realistic DC line fault on the pole 2 of the HVDC project is simulated successfully by use of the RTDS model connected with actual physical control and protection devices. And then, a complete evaluation theory of simulation errors is proposed. In the theory, residuals similarity is used to characterize the global error of dynamic simulation, and frequency, damping and amplitude similarity are used to characterize features errors respectively. The comparison analysis has been carried out between the simulation results and the fault recordings by the simulation similarity computation procedure based on LabVIEW. It is proved that the simulation results of existing models are almost the same as the fault recordings, and the simulation model of HVDC transmission system established can reflect operation characteristics of real network exactly. The realistic faults can be reproduced by the simulation experiment accurately.

关键词： Analytical models power system simulation Computational modeling Circuit faults HVDC transmission Circuit simulation power system reliability power system modeling IEEE members Testing

来源：评论

学校读者我要写书评

暂无评论

Comprehensive assessment of voltage sag considering reliability and economy

Comprehensive assessment of voltage sag considering reliabil...

引用

International Conference on Sustainable power Generation and Supply, SUPERGEN

作者： Xiaodong Yang Guodong Li Gengyin Li Ming Zhou Key Laboratory of Power System Protection and Dynamic Security Monitoring and Control under Ministry of Education North China Electric Power University Beijing China

ISBN: (纸本)9781424449347

The reliability of electricity supply is required by users increasingly, and whether to invest the reliability and voltage quality has been a point of contention. Thus, the assessment of voltage sag becomes acute. In this paper, the acceptable indices considering system performance and user characteristics are proposed for comprehensive assessment of voltage sag, including the reliability of the system and economy of users. The comprehensive assessment strategy, based on analytic hierarchy process (AHP), is applied to the assessment process for integrate the independent variables of the indices function. All the factors of users can be collected accurately from historic data, and the effectiveness of the method proposed in this paper is proved by the analysis of IEEE RBTS system.

关键词： Voltage fluctuations power supplies power quality power system reliability Frequency Economic indicators IEEE members system performance power generation economics Impedance

来源：评论

学校读者我要写书评

暂无评论

Stability analysis of the initial period of power system restoration using the path including VSC-HVDC

Stability analysis of the initial period of power system res...

引用

IEEE Conference on Industrial Electronics and Applications (ICIEA)

作者： Guangkai Li Key Laboratory of Power System Protection and Dynamic Security Monitoring and Control under Ministry of Education North China Electric Power University Baoding Hebei China

ISBN: (纸本)9781424427994

The stability problem during the initial period of power system restoration is mainly related with the following aspects. It is infirmly to resist interference since the power system scale is not large. It is easy to result in instability or short circuit fault for frequently and quickly load change. It is easy to arouse generation self-excited problem for the fewer load in total. Based on these characteristics of VSC-HVDC, the transmission line including VSC-HVDC is selected to restore system and its circuit model is founded in this paper. The simulation results show that the system can keep stability when the system is in steady state and fault. There are no self-excited problems. The speed of charging the transmission line and restoring loads is high too. Because of the isolation of the direct line the impact to source can be avoided by the long AC line, as is favor of the quick power system restoration.

关键词： Stability analysis power system restoration Circuit stability power system stability Circuit faults power transmission lines Distributed parameter circuits Resists Interference power system analysis computing

来源：评论

学校读者我要写书评

暂无评论

Classification and generalization of the load model based on model dynamic responses

引用

Diangong Jishu Xuebao/Transactions of China Electrotechnical Society 2009年第2期24卷 132-138页

作者： Zheng, Xiaoyu Ma, Jin He, Renmu Tang, Yonghong Key Laboratory of Power System Protection and Dynamic Security Monitoring and Control North China Electric Power University Beijing 102206 China Sichuan Electric Power Research Institute Chengdu 610072 China

The time-variable characteristic of the load is a limiting factor in the using of the load model. Load classification is a good approach to solve this problem. A new load model classification and generalization method is proposed in this paper. First, load model responses are chosen as the characteristic vectors in the cluster analysis. Then, the multi-curve identification technique is applied in building the load models for each class. Finally, more robust and practical models are obtained after the combination of classes, which are also verified by their strong generalization capability and physical interpretation.

关键词： Cluster analysis

来源：评论

学校读者我要写书评

暂无评论

Notice of Retraction: Passive Islanding Detection Method for Grid Connected PV system

Notice of Retraction: Passive Islanding Detection Method for...

引用

International Conference on Industrial and Information systems, IIS

作者： Fei Wang Zengqiang Mi Key Laboratory of Power System Protection and Dynamic Security Monitoring and Control under Ministry of Education North China Electric Power University Baoding Hebei China

This article has been retracted by the publisher.

关键词：

来源：评论

学校读者我要写书评

暂无评论

Flow transferring identification algorithm with consideration of transient period

Flow transferring identification algorithm with consideratio...

引用

IEEE General Meeting power& Energy Society

作者： T.S. Bi H.M. Xu S.F. Huang Q.X. Yang Key Laboratory f Power System Protection and Dynamic Security Monitoring and Control under Ministry of Education North China Electric Power University Beijing China

Cascading trips caused by flow transferring are crucial for lots of well-known blackouts. For a power system with heavy load flow, once there is a fault, the system might suffer flow transferring after the fault clearing. However, for relays, they cannot know the sensing overcurrent is caused by internal faults or flow transferring. The relays will trip the overcurrent after the predefined time delay, which might result in flow transferring again and worsen the system state. Therefore, if relays pickup due to flow transferring, the back-up relay should be blocked until the thermal limit of the line reaches. In this paper, Flow Transferring Relativity Factor (FTRF) is suggested to estimate the flow distribution after a line is tripped. Moreover, based on the relationship of node injection and branch currents, the impact of transient period on the flow distribution is analyzed. Finally, a flow transferring identification algorithm is presented to distinguish flow transferring from internal fault caused by fault clearing. The simulation results of 10-generator 39-bus New England system show that the proposed flow transferring identification algorithm works well.

关键词： power system protection power system faults power system relaying power system dynamics power system transients Wide area measurements Fault diagnosis power system security Bismuth Delay effects

来源：评论

学校读者我要写书评

暂无评论

The implementation of fuzzy adaptive PI controller in VSC-HVDC systems

The implementation of fuzzy adaptive PI controller in VSC-HV...

引用

IEEE PES power systems Conference and Exposition, PSCE

作者： Haifeng Liang Gengyin Li Ming Zhou Chengyong Zhao Key Laboratory of Power System Protection and Dynamic Security Monitoring and Control under Ministry of Education Changping North China Electric Power University Beijing China

Focusing on the passive network, this paper analyzes the discrete mathematical model and its control strategy of the passive terminal of the VSC-HVDC system on the basis of the alpha-beta frame of axes. The method of the functioning-fuzzy-subset inference is introduced into automatic regulation of the proportional integral (PI) parameters. Based on the digital signal processor (DSP), the fuzzy PI control method is adopted and the VSC-HVDC experiment device is constructed. The experiment of constant AC voltage control based on fuzzy adaptive PI controller in transmitting power to passive network via VSC-HVDC system is developed. The experimental results show that the fuzzy controller with adaptive PI parameters for AC voltage control of VSC-HVDC system is effective.

关键词： Fuzzy control Fuzzy systems Programmable control Adaptive control control systems Voltage control Automatic control Passive networks Mathematical model Digital signal processors

来源：评论

学校读者我要写书评

暂无评论

A novel method to rapidly identify inrush current and internal fault current based on variation characteristic of fundamental current amplitude

引用

Diangong Jishu Xuebao/Transactions of China Electrotechnical Society 2009年第6期24卷 166-171页

作者： Ma, Jing Wang, Zengping Wu, Jie Key Laboratory of Power System Protection and Dynamic Security Monitoring and Control North China Electric Power University Beijing 102206 China Zhejiang Electric Power Design Institute Hangzhou 310014 China

A new transformer protection principle based on two-instantaneous-value-product algorithm to extract the feature of fundamental current amplitude is put forward in this paper. First, the algorithm of two-instantaneous-value-product is developed, and variation trends of fundamental current amplitudes are analyzed in the case of inrush currents and internal fault currents. Whether the fundamental current amplitude reveals the descending feature or not can be used to distinguish the inrush current and the internal fault. The computational simplicity of the proposed scheme enables its implementation in real-time applications with low-cost microprocessors. dynamic testing results indicate that this method is able to clear internal fault even light fault less than a cycle and can not be affected by the current transformer saturation. Moreover, compared with the second harmonic restraint principle and the waveform comparison principle, the proposed algorithm has better performance.

关键词： Transformer protection

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：