检索结果-内蒙古大学图书馆

International Conference on Critical Infrastructure

作者： Wang, Jin Guo, Chunlin Xiao, Xiangning Zheng, Rui Key Laboratory of Power System Protection and Dynamic Security Monitoring and Control North China Electric Power University China

ISBN: (纸本)9781424480814

The method, complex torque coefficient approach, which is used to analyze the sub synchronous oscillation (SSO) problems with the help of PSCAD/EMTDC are recommended. While how to achieve the complex torque coefficient approach by time-domain simulation method effectively has not been specified. With the simulation study of different systems like HVDC system, AC system with series compensation device, etc, amplitude, injection time and additivity of injected oscillating torques are discussed. A set of conclusion to the method is drawn for reference. © 2010 IEEE.

关键词： HVDC power transmission

来源：评论

学校读者我要写书评

暂无评论

Research of analysis method of power system real-time digital simulation error

Research of analysis method of power system real-time digita...

引用

International Conference on Critical Infrastructure

作者： Wang, Xiangxu Guo, Chunlin Xiao, Xiangning Zhao, Chengyong Key Laboratory of Power System Protection and Dynamic Security Monitoring and Control North China Electric Power University China

ISBN: (纸本)9781424480814

Simulation accuracy has great effects on power system analysis and control. In this paper, in order to analyze the power system real-time digital simulation error, prony algorithm is used to extract the features of signal. Based on the analysis results of this algorithm, residual similar index was used to characterize the global error of simulation, and then frequency, damping and amplitude similar indexes were employed to represent features error of transient signals respectively. A calculation program for power system real-time digital simulation accuracy evaluation was employed to analyze the measured waveforms and results of fault simulations on RTDS. Simulation results have proved the validity of the proposed analysis method of power system real time digital simulation error. © 2010 IEEE.

关键词： Errors

来源：评论

学校读者我要写书评

暂无评论

Synthetic quantitative assessment of power quality in competition market environment

Synthetic quantitative assessment of power quality in compet...

引用

2005 IEEE/PES Transmission and DistributionConference and Exhibition - Asia and Pacific

作者： Xu, Yonghai Chen, Lei Xiao, Xiangning Key Laboratory of Power System Protection and Dynamic Security Monitoring and Control Ministry ot Education Beijing China

ISBN: (纸本)0780391144

A new method, which integrates the virtue of the probability and mathematical statistics with that of the fuzzy mathematics for power quality assessment, is proposed in this paper. The index showing an aspect of power quality is evaluated using probability and mathematical statistics respectively;the global unique index of these indexes can be obtained. The results obtained from each index unified are unified again using fuzzy synthetic appraisal in order to give an objective, overall and unique index of power quality. The special assessment method for voltage sag using the Average Sag Energy Index is also discussed. Finally, a transaction mode makes the maximum benefits for different unit commitment as objective function and takes the power quality into account is presented, and then power energy really becomes a commodity which would be evaluated a price according to power quality. © 2005 IEEE.

关键词： Electric power systems

来源：评论

学校读者我要写书评

暂无评论

A method to compensate unbalanced load based on instant reactive power theory

A method to compensate unbalanced load based on instant reac...

引用

2009 Asia-Pacific power and Energy Engineering Conference, APPEEC 2009

作者： Kun, Qiao Zhongdong, Yin Xiangning, Xiao Qipeng, Song Key Laboratory of Power System Protection and Dynamic Monitoring and Control North China Electric Power University Beijing 102206 China

ISBN: (纸本)9781424424870

On the base of generalizing previously research findings, the authors of the paper apply theory of instant reactive power and theory of unbalanced compensation in the controlling of static reactive-power compensation equipments which can increase power factor and compensate three unbalance, thus simplify the algorithm of the instant reactive power. The formulary of compensating reactance is deduced in the condition of unbalanced load. The model of SVC which may compensate unbalanced load is established with PSCAD. The simulation proves availability and feasibility of the method. In view of the aberrance of bus current in the simulation, the paper analysis harmonic content of three-phase. It is also approved feasible of the algorithm in the condition of seriously disturbing by harmonic. © 2009 IEEE.

关键词： Reactive power

来源：评论

学校读者我要写书评

暂无评论

Sliding mode variable structure direct power control of permanent-magnet direct drive generator

Sliding mode variable structure direct power control of perm...

引用

2nd Annual Conference on Electrical and control Engineering, ICECE 2011

作者： Tang, Niang Xiao, Xiang-Ning Guo, Jing Zhou, Shuang-Ya Key Laboratory of Power System Protection and Dynamic Security Monitoring and Control North China Electric Power University Beijing China

ISBN: (纸本)9781424481637

The pulse width modulation technique and dynamic operating mode characteristics of direct drive permanent magnet synchronous generator (PMSG) are researched firstly. A novel sliding mode variable structure directed power control algorithm applied to PMSG is proposed, and then design the controller using tip speed radio and flux-weakening control scheme. It can not only provide a constant switching frequency without involving any synchronous speed coordinate transformation and generator side phase information, but also can reduce the capacitance of generator-side converter. Simulation and experimental results show that the proposed theoretical analysis method and control strategy is effective under the platform PSCAD/EMTDC. © 2011 IEEE.

关键词： Permanent magnets

来源：评论

学校读者我要写书评

暂无评论

New research advancement in electrical engineering field of China-Reviews on special issue of Science in China Series E:Technological Sciences

引用

Chinese Science Bulletin 2009年第8期54卷 1285-1286页

作者： MEI ShengWei MA Jin State Key Laboratory of Power System Department of Electrical Engineering Tsinghua University Beijing 100084 China Key Laboratory of Power System Protection and Dynamic Security Monitoring and Control of Ministry of Education North China Electric Power University Beijing 102206 China

Based on,but not limited to the research results of electrical engineering published in the special issue of Science in China Series E,June 2008,this essay gives a brief review on a wide range of state-of-art advancement in electrical engineering field of China,which includes power system modeling,analysis and control,risk assessments in power system,etc.

关键词：电气工程工程领域技术科学电力系统研究成果中国科学系统建模风险评估

来源：评论

学校读者我要写书评

暂无评论

The finite elements analysis on magnetic field of controllable saturated reactor

The finite elements analysis on magnetic field of controllab...

引用

2009 International Conference on power Electronics and Drive systems, PEDS 2009

作者： Ziqiang, Wang Zhongdong, Yin Po, Yang Ke, Li Key Laboratory of Power System Protection and Dynamic Security Monitoring and Control North China Electric Power University Beijing China

ISBN: (纸本)9781424441662

In the power system, the controllable reactor can be used as reactive power compensation device to limit over-voltage operation, reduce no-load or light load loss and improve transmission capacity. It is with characters of simple structure, easy maintaining, low cost and high stability, etc. The magnetic field is closely related to the reactor performance. In this paper, aiming at a controllable saturated reactor prototype, using the finite elements method, the magnetic field is studied. Then, the precise 2-D prototype field-circuit coupling model is established based on the magnetic field analysis and the finite element analysis software - ANSYS. Using this model, the magnetic field and working currents concrete values under the condition that AC and DC excitations co-exist within the core are calculated. The analysis results indicate that finite element analysis theory can effectively analyze the magnetic field of the reactor.

关键词： Magnetic fields

来源：评论

学校读者我要写书评

暂无评论

Study on emergency control based on Regional frequency response model

Study on emergency control based on Regional frequency respo...

引用

2011 International Conference on Advanced power system Automation and protection, APAP 2011

作者： Zhang, Zhichao Wang, Zengping Chen, Xin Key Laboratory of Power System Protection and Dynamic Security Monitoring and Control North China Electric Power University Beijing China

ISBN: (纸本)9781424496198

Frequency stability refers to the ability of a power system to maintain steady frequency following a severe system upset resulting in a significant imbalance between generation and load. The rate of frequency change (df/dt) is an instantaneous indicator of power deficiency and can incipient recognition of power imbalance. The new method presented in this paper assumes the application of the WAMS as a base for their successful implementation. The adaptive scheme aims to extract the relevant power system parameters from on-line measurements. Therefore, the scheme can adapt its sensitivity to the current operating conditions, eliminating the need for many assumptions that have to make when tuning the conventional local scheme. In the predictive step, this model is used to estimate a frequency trajectory following a disturbance. The proposed scheme uses the local frequency rate information to adapt the load shedding behavior to the size and location of the experienced disturbance. Based on this prediction it can be determined whether emergency UFLS control actions are necessary. © 2011 IEEE.

关键词： Frequency response

来源：评论

学校读者我要写书评

暂无评论

Auxiliary frequency control of HVDC systems for wind power integration

Auxiliary frequency control of HVDC systems for wind power i...

引用

2010 5th International Conference on Critical Infrastructure, CRIS 2010

作者： Hu, Jing Zhao, Chengyong Key Laboratory of Power System Protection and Dynamic Security Monitoring and Control North China Electric Power University Beijing 102206 China

ISBN: (纸本)9781424480814

As a promising renewable resource, wind power is highly expected to contribute a significant part of generation in power systems in the future, but this also brings new integration related power quality issues due to its unconventional characteristics. To solve frequency fluctuating problems of wind power integration, this paper proposes an idea that it is possible and reasonable to use HVDC lines with auxiliary frequency control(AFC) to stabilize the frequency fluctuation caused by wind power, which could increase the rate of wind power integration not only, but also reduce intra-region reserve capacity and wind power cost. Furthermore, an improved frequency control strategy of HVDC is proposed. The simulation results show that the substitution of wind power frequency control reserves with the HVDC connection is possible without additional equipment and without causing large disturbances in both sides. © 2010 IEEE.

关键词： Wind power

来源：评论

学校读者我要写书评

暂无评论

A phase correction method of HVDC supplementary subsynchronous damping controller

A phase correction method of HVDC supplementary subsynchrono...

引用

10th IET International Conference on AC and DC power Transmission, ACDC 2012

作者： Niang, Tang Xiangning, Xiao Jian, Zhang Yunfei, Xu Qiushuo, Li Key Laboratory of Power System Protection and Dynamic Security Monitoring and Control North China Electric Power University Beijing 102206 China

ISBN: (纸本)9781849197007

The turbo-generator units in the vicinity of HVDC transmission system are vulnerable to Sub-Synchronous Torsional Interactions (SSTI). Based on the AC-DC system decoupling transfer function structure of Generator rotation rate to the electric torque, a novel phase correction method of HVDC supplementary subsynchronous multiple models damping controller is proposed, and a SSDC software for adjusting and analyzing the parameters with matlab is designed. The simulation, including Hulunbier-Liaoning HVDC system in the northeast power grid in China which can arouse the SSTI, proves the feasibility and effectiveness of the method.

关键词： MATLAB

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：