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IEEE International Conference on power system Technology

作者： Bo Xu Xueshan Han Yong Wang Donglei Sun Key Laboratory of Power System Intelligent Dispatch Control of Ministry of Education (Shandong University) Jinan China

In the context of Condition Based Maintenance (CBM), this paper presents a risk-based optimization model for system maintenance scheduling problem. It consists on optimizing availability and cost of the system by balancing between system maintenance risk and failure risk. In this paper, system reliability constraint is considered. Reliability of system components is characterized by their failure rate functions. Possible maintenance actions are performed to improve the reliability of the system. Genetic algorithm is used to obtain the sequence of maintenance actions providing desired level of reliability with minimum system risk. Numeral results demonstrate effectiveness of the proposed model.

关键词： Condition based maintenance Maintenance scheduling system reliability Genetic algorithm

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power system Operational Reliability Equivalent Modeling and Analysis Based on the Markov Chain

Power System Operational Reliability Equivalent Modeling and...

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IEEE International Conference on power system Technology

作者： Yong Wang Xueshan Han Ying Ding Key Laboratory of Power System Intelligent Dispatch and Control of Ministry of Education(Shandong University) Jinan Shandong Province China State Grid of China Technology College Jinan Shandong Province China

Aiming at the disadvantage of Monte Carlo simulation method in slow convergence and using a great number of computation resources, this paper, based on analytical approach, builds a quick power system operational reliability analyzing model. From the viewpoint of operation, this model which is based on Markov chain, assumes that equipment failure rate follows exponential distribution. Its core content includes three aspects. Firstly, a convenient criterion, used to divide power system operation into three states, and the corresponding state-space transition expression are proposed for engineering application. Secondly, Markov state transition probability matrix is obtained based on power system operation historical data (or simulation data sample). Thirdly, based on state transition probability matrix and current operating state of power system, state transition probability, steady state probability and the mean time to first failure can be acquired very quickly. Example analysis using RBTS-BUS6 system, testified the Markov property of power system state transition and the efficiency of this study.

关键词： Markov chain power system Reliability assessment Reliability prediction

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Research on fractional order controller based on best rational approximation approach

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Journal of Convergence Information Technology 2012年第4期7卷 50-58页

作者： Zhao, Huimin Nie, Bing Li, Wen Deng, Wu Software Institute Dalian Jiaotong University Dalian 116028 China Key Laboratory of Numerical Simulation in the Sichuan Provincial College Neijiang Normal University Neijiang 641112 China Artificial Intelligence Key Laboratory of Sichuan Province Sichuan University of Science and Engineering Zigong 643000 China State Key Laboratory of Power Transmission Equipment and System Security and New Technology College of Electrical Engineering Chongqing University Chongqing 400044 China Key Laboratory of advanced Design and Intelligent Computing Dalian University Ministry of Education Dalian 116622 China

Introduce the basic concept of best rational approximation and constructing procedure of the best rational approximation function in Laplace domain. By an illustrative example the design method of FOC based on best rational approximation is discussed. The performance comparison of transfer functions between the FOC obtained by best rational approximation method and conventional PID shows that it is effective to apply the method in design of FOC, which can guarantee maximum absolute error of amplitude frequency characteristic of approximation function in a given error tolerance.

关键词： Rational functions

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大电网恢复适应性分区方法

大电网恢复适应性分区方法

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2012年中国智能电网学术研讨会

作者： LIU Yu-tian 刘玉田 TAN Bing-xue 谭冰雪 Key Laboratory of Power System Intelligent Dispatch and Control of Ministry of Education of China(Sh 电网智能化调度与控制教育部重点实验室(山东大学) 山东济南 250061 Key Laboratory of Power System Intelligent Dispatch and Control of Ministry of Education of China(Sh 电网智能化调度与控制教育部重点实验室(山东大学) 山东济南 250061 杭州市电力局浙江杭州310009

针对大电网并行恢复分区问题，提出了一种适应性分区方法。以复杂网络中的社团划分理论为基础，将分区过程分为凝聚与分裂两个阶段。凝聚阶段主要处理黑启动过程对分区的特殊要求，将黑启动电源与附近重要发电厂及恢复节点聚合，形成初... 详细信息

针对大电网并行恢复分区问题，提出了一种适应性分区方法。以复杂网络中的社团划分理论为基础，将分区过程分为凝聚与分裂两个阶段。凝聚阶段主要处理黑启动过程对分区的特殊要求，将黑启动电源与附近重要发电厂及恢复节点聚合，形成初始子系统;分裂阶段引入基于边的聚合度及介数的联络度指标，据此寻找连接各分区的关键线路并断开，最终形成多个恢复分区。该方法不仅能形成可行、可靠的恢复分区，保证各分区内部有逐步恢复供电的能力，而且考虑到实际调度中的分层、分区控制原则，能够减小恢复分区与实际调度的冲突。山东电网仿真结果表明，所提方法能较好处理大电网停电后的恢复分区问题，且能在地区层级上指导大电网中黑启动机组的配置。

关键词：电力系统供电恢复适应性分区黑启动电源社团划分理论

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A class of uncertain chaotic systems using the fast terminal sliding mode control

A class of uncertain chaotic systems using the fast terminal...

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Chinese control Conference (CCC)

作者： Bai Yongqiang A Lata Li Xiaofang School of Automation Key Laboratory of Complex System Intelligent Control and Decision Ministry of Education Beijing Institute of Technology Beijing China Institute of State 157 factory Chendu China

ISBN: (纸本)9781467325813

Problems of uncertain chaotic systems with fast terminal sliding mode control are discoursed. Aim at the uncertainty parameters of chaotic systems, proposed a fast terminal sliding mode control method, and the corresponding sliding surface and controller are designed, which make the state variables of the system fast convergence to the equilibrium point in the limited time. And the examples are given to verify the feasibility of the system.

关键词： Sliding mode control Electronic mail Synchronization Chaotic communication Uncertainty educational institutions

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The new field power device based on super capacitor and it's application

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Binggong Xuebao/Acta Armamentarii 2012年第SUPPL2期33卷 417-422页

作者： Bai, Yong-Qiang Jin, Tian-Xu Wang, Hai-Jie School of Automation Beijing Institute of Technology Beijing 100081 China Key Laboratory of Complex System Intelligent Control and Decision Ministry of Education Beijing Institute of Technology Beijing 100081 China Harbin Jurong New Power Co. Ltd. Harbin 150078 Heilongjiang China

Based on special demand of field power for artillery electric drive system and analysis of the existing power system, a new design of hybrid power device with super capacitor is proposed to replace the traditional battery, which is more suitable to the field requirements, and has more energy efficiency, greater power ratio, and energy ratio. The design criteria and formula are presented. Test results show that the hybrid device, compared with the traditional power device, has the advantages of high efficiency, high energy volume ratio, high weight ratio, strong environmental adaptability, and good lower temperature performances, and can meet the demand of power device in the field condition.

关键词： Energy efficiency

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智能变电站新型站域后备保护研究

智能变电站新型站域后备保护研究

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2012年中国智能电网学术研讨会

作者： GAO Hou-lei 高厚磊 LIU Yi-qing 刘益青 SU Jian-jun 苏建军 CUI De-min 崔得民 LIU Jian 刘建 XIANG Min-jiang 向珉江 Key Laboratory of Power System Intelligent Dispatch and Control of Ministry of Education(Shandong Un 电网智能化调度与控制教育部重点实验室(山东大学) 山东济南250061 Dezhou Power Supply Company Dezhou 253008China 德州供电公司山东德州 253008

为解决传统变电站后备保护在配置和原理方面存在的问题，提出了适用于智能变电站的基于电流差动原理的站域后备保护新方案。该方案以变电站及所有出线为保护对象，定义了四类不同特性的差动区，根据其处于制动状态或者差动状态来实现故... 详细信息

为解决传统变电站后备保护在配置和原理方面存在的问题，提出了适用于智能变电站的基于电流差动原理的站域后备保护新方案。该方案以变电站及所有出线为保护对象，定义了四类不同特性的差动区，根据其处于制动状态或者差动状态来实现故障定位，并根据主保护和断路器的动作信号确定后备保护的跳闸策略。详细阐述了站域差动后备保护的工作原理、故障元件定位流程以及主、后备保护之间的协调控制方法。采用该方案的智能变电站，保留传统的面向间隔的主保护，集中配置站域后备保护，简化了后备保护的配置和整定。利用PSCAD软件构建了典型变电站仿真模型，对正常运行、保护区内外故障等不同运行状态进行了全面仿真，验证了所提方案的正确性。

关键词：智能变电站站域后备保护电流差动原理仿真模型

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A self-healing reconfiguration technique for smart distribution networks with DGs

A self-healing reconfiguration technique for smart distribut...

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

作者： Li, Dapeng Wang, Shouxiang Zhan, Jie Zhao, Yishu Key Laboratory of Power System Simulation and Control Tianjin University Ministry of Education Tianjin 300072 China State Grid of China Technology College Shandong Jinan 250002 China

ISBN: (纸本)9781424481637

The requirement for power supply reliability and power quality has been increasing. When a fault occurs in distribution networks, fast locating and isolating the fault, restoring the power, and reducing outage time and area are becoming more and more crucial. The concept of fast self-healing has been proposed, which is also the requirement for smart grid development. In this paper, a self-healing reconfiguration technique is proposed for smart distribution networks with insertion of distributed generations (DGs). And a tree structure algorithm based on heuristic rules is proposed. Islands formed by DGs are used to deal with fault isolation and power restoration after a fault occurs. The effectiveness of the proposed algorithm is verified using a 26 bus bars test system with DGs. © 2011 IEEE.

关键词： Distributed power generation

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A self-healing reconfiguration technique for smart distribution networks with DGs

A self-healing reconfiguration technique for smart distribut...

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International Conference on Electrical and control Engineering (ICECE)

作者： Dapeng Li Shouxiang Wang Jie Zhan Yishu Zhao Key Laboratory of Power System Simulation and Control of Ministry of Education Tianjin University Tianjin China State grid of china technology College Jinan Shandong China

关键词： Reliability power system reliability Load flow Distributed power generation power quality

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A Generalized Leakage Inductance-Based Method for Discrimination of Internal Faults from Inrush Currents

A Generalized Leakage Inductance-Based Method for Discrimina...

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IEEE power and Energy Society General Meeting

作者： Jing Ma Tong Wang Jie Wu Zengping Wang School of Electrical and Electronic Engineering North China Electric Power University Key Laboratory of Power System Protection and Dynamic Security Monitoring and Control under Ministry of Education North China Electric Power University State Nuclear Electric Power Planning Design and Research Institute

ISBN: (纸本)9781457710001

A novel scheme based on generalized leakage inductance (GLI) to distinguish the inrush current from the internal fault current in the power transformer is proposed. By eliminating the mutual flux linkage in the transformer loop equation and adopting the trapezoid principle, the GLI is calculated in the real time. According to the difference between the GLI and the leakage inductance obtained from transformer manufacturer, the criterion to identify the internal fault is developed. A total of 162 experimental cases have been tested and the proposed method is able to reliably and accurately discriminate internal faults from inrush currents with easy implementation. Also, the method is suitable if it is not possible to measure the currents in the delta winding. Furthermore, the method is independent of the B-H curve and iron losses.

关键词： Generalized leakage inductance Inrush current Internal fault current power transformer Inrush current internal fault ELECTRIC TRANSFORMERS currents INFLUX ocean currents water currents magnetization curve fault currents Extravasation Transformer Core loss

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