检索结果-内蒙古大学图书馆

Emergency control Strategy for Line Overload Considering power Source and Load Fluctuation

IOP Conference Series: Earth and Environmental Science 2021年第1期687卷

作者： Zhiqing Liu Fei Wang Jifu Qiu Fan Chen Zhipeng Lu Ming Chen Qingda Niu Xiaoming Dong State Grid Shandong Electric Power Company Jinan Shandong Province 250001 China Dezhou Electric Power Supply Company of State Grid Shandong Electric Power Electric Power Company Dezhou Shandong Province 253011 China Qingdao Electric Power Supply Company of State Grid Shandong Electric Power Electric Power Company Qingdao Shandong Province 266002 China Key Laboratory of Power System Intelligent Dispatch and Control Ministry of Education Shandong University Jinan Shandong Province 250061 China

Uncertain factors such as the integration of renewable energy into the grid and load fluctuations have brought more risks to the safe dispatch of the grid. The random power flow is used to calculate the impact of distributed power sources and load fluctuations on the grid, and to quantify the probability distribution of line power, which can avoid the drawbacks of deterministic power flow that cannot fully reflect the line overload risk. Combining the line overload level with the traditional load shedding method can effectively prevent the system from cascading failures caused by the risk of line overload, improve the optimistic calculation results caused by the load shedding strategy in emergency situations that cannot consider source load fluctuations, and make the grid control more safe and reliable.

关键词：

来源：评论

学校读者我要写书评

暂无评论

MILP model for annual power and energy balance of hydro-thermal-wind power system considering RPS mechanism

MILP model for annual power and energy balance of hydro-ther...

引用

8th Renewable power Generation Conference (RPG 2019)

作者： Danyang Zhao Wei Yan Cheng Luo Tian Luo State Key Laboratory of Power Transmission Equipment & System Security and New Technology (Chongqing University) Chongqing 400043 China Chongqing Electric Power College Chongqing 400050 China Key Laboratory of Control of Power Transmission and Conversion Ministry of Education (Shanghai Jiao Tong University) Shanghai 200240 China

ISBN: (数字)9781839531248

ISBN: (纸本)9781839531255

As more mandatory policies including Renewable Energy Portfolio Standard (RPS) in China have been introduced to promote renewable generations, traditional power balancing models may become no longer applicable to economically satisfy such ambitious goals. From the perspective of Chinese provincial power grid companies, proper scheduling could increase the penetration of renewable energy sources so as to meeting the urgent RPS requirements. In order to economically schedule annual power generations with consideration of RPS requirements and safety constraints, this paper proposes an annual power and energy balancing model of hydro-thermal-wind power system. The model aims to minimize the cost of power generation under the implementation of the RPS mechanism in China. Regional power grid's power balance constraints, the RPS constraints, hydropower monthly coordination as well as safety constraints including the operational characteristic constraints of hydropower, thermal power and wind power generator units have been considered. The model is formulated as mixed integer linear programming (MILP) problem, which is solved by CPLEX. Based on the data of a certain provincial power grid, the simulation results verify the effectiveness of the model.

关键词：

来源：评论

学校读者我要写书评

暂无评论

Application of Virtual Synchronous Generator in Solar power Generation 1

Application of Virtual Synchronous Generator in Solar Power ...

引用

1st International Conference on Advanced Algorithms and control Engineering, ICAACE 2018

作者： Su, Jianjun Li, Wenbo Liu, Hengjie Meng, Fanmin Wang, Long Han, Xueshan State Grid Shandong Electric Power Research Institute China State Grid Laiwu Power Supply Company China Key Laboratory of Power System Intelligent Dispatch and Control Ministry of Education Shandong University Jinan China

For the virtual synchronous control strategy of grid-connected inverters, the impact of the output response of the change of source is mainly analyzed, and the response time is calculated to lay a theoretical foundation for the system economic dispatch. First, the photovoltaic cell model is introduced, as well as the mathematical model and control strategy of the virtual synchronous generator. Then the optimal configuration of the source input is analyzed under different inertia and virtual damping conditions. The results show that the virtual inertia and damping coefficient of the inverter are closely related to the energy density and response time of the source input. Finally, a simple simulation model is given to observe the influence of the output change of the source on the response of the inverter output. © Published under licence by IOP Publishing Ltd.

关键词： Solar power generation

来源：评论

学校读者我要写书评

暂无评论

Assessment of Wind power Ramp Events Based on Stacked Denoising Autoencoder

Assessment of Wind Power Ramp Events Based on Stacked Denois...

引用

International Conference on Advanced power system Automation and Protection (APAP)

作者： Zhixiang Liang Yutian Liu Xiaoming Liu Xiangyang Cao Liudong Zhang Haiwei Wu Qibing Zhang Ming Yang Key Laboratory of Power System Intelligent Dispatch and Control (Shandong University) Ministry of Education Jinan China State Grid Shandong Electric Power Company Economic & Technology Research Institute Jinan China State Grid Jiangsu Electric Power Company Nanjing China

ISBN: (数字)9781728117225

ISBN: (纸本)9781728117232

Wind power ramp events had a significant impact on the power balance of power system and may lead to load shedding. A data driven method was proposed for wind power ramp events assessment in this paper. The K-means clustering algorithm was used to divide the samples to several classes. The stacked denoising autoencoder was used to extract layer features to train support vector machine. Historical and forecast data of wind power, load power, conventional unit and pumped storage station power were taken as inputs. The output was whether ramp event occurred. A severity function was constructed to assess the severity grade which was predicted to be a wind power ramp event based on effect theory. The credibility of the assessment result was represented by confidence interval. simulation results of a provincial power grid showed that the prediction method in this paper was more accurate and credibility was high enough to help the dispatchers to take measures for the security of power grid.

关键词： Wind power generation Feature extraction Support vector machines power grids Security Prediction algorithms Clustering algorithms

来源：评论

学校读者我要写书评

暂无评论

Comparisons of MVAC and MVDC systems in Dynamic Operation, Fault Protection and Post-Fault Restoration

Comparisons of MVAC and MVDC Systems in Dynamic Operation, F...

引用

Annual Conference of the IEEE Industrial Electronics Society

作者： Gen Li Jun Liang Lu Zhang Gangui Yan Tibin Joseph School of Engineering Cardiff University Cardiff United Kingdom College of Information and Electrical Engineering China Agricultural University Beijing China Key Laboratory of Modern Power System Simulation and Control & Renewable Energy Technology Ministry of Education Northeast Electric Power University Jilin China

One of the most significant obstacles preventing the large-scale application of direct-current (DC) technology in medium voltage (MV) distribution networks is their fault protection. The existing AC relay protection needs to be changed or redesigned to protect the future overlay MVAC and MVDC distribution networks. Therefore, a comprehensive understanding of the dynamic and fault behavior and post-fault restoration strategies of MVAC and MVDC systems are critically important. Moreover, a comparison of MVAC and MVDC systems during a fault will also contribute to designing the protection systems of hybrid MV AC/DC systems. In this paper, the challenges of protecting DC faults of MVDC systems and possible solutions are first introduced. Then, the fault characteristics and post-fault restoration of MVDC and MVAC distribution systems are compared and investigated through case studies. Time-domain simulations have been conducted in PSCAD/EMTDC. The work in this paper will be valuable for the protection design for future hybrid MV AC/DC systems.

关键词：

来源：评论

学校读者我要写书评

暂无评论

A Multi-Objective Model with Probability Constraints of Trans-Provincial Dynamic Stability Limit

A Multi-Objective Model with Probability Constraints of Tran...

引用

2019年第五届机械工程及自动化科技国际会议

作者： Ke Yang Rui Mao Xu Wen Chuncheng Gao Miao Huang Wei Yan Southwest Subsection of State Grid State Key Laboratory of Power Transmission Equipment & System Security and New Technology(Chongqing University) College of Automation Chongqing University of Posts and Telecommunications Beijing Ke Dong Electric Power Control System Co. Ltd. Nari Group Corporation/State Grid Electric Power Research Institute

With the rapid development of clean energy and serious delay of grid construction, water abandonment is becoming more and more severe. Under this condition, this paper proposed a multi-objective model with probability constraints of trans-provincial hydropower consumption considering dynamic stability limit. Firstly, a mathematical expression about the dynamic stability limit of trans-provincial channel is constructed. Secondly, a risk assessment index of abandoned water is established on the basis of semi-absolute deviation. Then, based on the framework of stochastic programming, a multi-objective model with probability constraints is proposed for hydropower transmission in trans-provincial trade. By means of genetic algorithm with embedded Monte-Carlo simulation technology, the model can be solved efficiently. Finally, data of Tibet power grid is calculated to verify the validity and universality of the research. The results show that the established model can achieve optimal economic benefit between grid companies and generation enterprises, and also effective management of water abandonment risk.

关键词： A Multi-Objective Model with Probability Constraints of Trans-Provincial Dynamic Stability Limit Model

来源：评论

学校读者我要写书评

暂无评论

Travelling waves-based fault location scheme for feeders in power distribution network

Travelling waves-based fault location scheme for feeders in ...

引用

作者： Shi, Shenxing Lei, Aoyu He, Xin Mirsaeidi, Sohrab Dong, Xinzhou State Key Laboratory on Power System Department of Electrical Engineering Tsinghua University Beijing100084 China Power Dispatching and Control Center Guiyang550000 China

Fault location in distribution systems is difficult for multiple discontinuities, such as branch and junction points on feeders. This paper proposes a scheme for fault location in distribution systems using network topology information and circuit breaker reclosure-generating travelling waves. Based on the topology information, the circuit breaker closure-generating travelling waves can be got through analysis. When a permanent fault occurs, the circuit breaker reclosure-generating travelling waves contain the information on fault position. In this paper, the difference between the pre-fault travelling waves and post-fault travelling waves induced by the breaker reclosing in a feeder, defined as reclosing superimposed travelling waves, is calculated. For the reclosing superimposed travelling waves, the initial travelling wave reflects the fault distance. Subsequently, wavelet transform is applied to extract the travelling wave reflected from the fault point. Finally, the time difference between the reclosing instant and the arrival instant of the reflected travelling wave is employed to calculate the fault distance. In order to verify the effectiveness of the proposed scheme, several simulations were carried out using ATP-EMTP software. The simulation results indicated that the proposed scheme can be effective in fault location for distributed feeders, regardless of grounding system type. © Institution of Engineering and Technology. All rights reserved.

关键词： Wavelet transforms

来源：评论

学校读者我要写书评

暂无评论

A Finite-time Estimation For Updating Look-up Tables

A Finite-time Estimation For Updating Look-up Tables

引用

Conference on Vehicle control and Intelligence (CVCI)

作者： Xiaoyu Wang Hai Yin Changhui Wang Yongsheng Chai Mei Liang Shujie Sun State Grid Heilongjiang Electric Power Company Limited Research Institute Harbin China State Key Laboratory of Automotive Simulation and Control Jilin University Changchun China School of Electromechanical and Automotive Engineering Yantai University Yantai China

ISBN: (纸本)9781728126845

In this paper the problem of look-up table parameters updating is studied to cope with physical systems changes due to operating conditions and age. To this aim, an estimation algorithm is developed in order to update look-up table parameters in a finite-time. The convergence proofs are presented by Lyapunov-based approach, and the results are given based on the regressor model related to the identifiability condition. The estimation error is analyzed for the proposed algorithm. The validity of the presented algorithm is verified through the discharge coefficient map of the gasoline engine form enDYNA.

关键词： Look-up tables Parameters updating Finite-time Tables algorithms Operating conditions gasoline engine discharge coefficient Mathematic Identifiability Estimation error Proof

来源：评论

学校读者我要写书评

暂无评论

Blockchain-based Social Manufacturing for Customization Production

引用

IFAC-PapersOnLine 2020年第5期53卷 53-58页

作者： Xiuqin Shang Xi Chen Lulu Niu Gang Xiong Zhen Shen Xisong Dong Zhengchao Shen Chao Liu Bangwen Xi the Research Center of Precision Sensing and Control the state key laboratory for management and control of complex systems & Beijing engineering research center of intelligent systems and technology institute of automation Chinese Academy of Sciences Beijing 100190 China Beijing University of Posts and Telecommunications Beijing 100876 China Alstom Beizhong Power (Beijing) Co. Ltd. Beijing 100040 China the System Integration Electronics (Hangzhou)Co. LTD No. 58 No. 11 Road Foxconn Qiantang Tech-Industrial Area HETZ Hangzhou 310018 China

This paper proposes the social manufacturing based on Blockchain, which realizes precise and efficient customization through smart contract and distributed accounting. It is a new manufacturing mode of service-oriented, distributed and collaborative customization. This paper proposes the definition of SM based on Blockchain. In the process of using to Blockchain, it can form a strong trust relationship, so that multiple nodes / roles in SM can save the complete copy of the whole database, rather than a centralized permission / role. Secondly, the Blockchain-based SM system is developed for customized manufacturing. Finally, its application case and the optimization results are given. In SM, it is the key that how to transform customized manufacturing actions into socialized actions of manufacturing resources through internet communities and interconnect Socialized Manufacturing Resources (SMRs) in upstream and downstream. In this paper, the smart contract relationship is established based on Blockchain between SMRs to build credit mechanism in SM, Which can ensure the effective circulation and association of SMRs.

关键词： Social Manufacturing Blockchain Optimization SM Resources

来源：评论

学校读者我要写书评

暂无评论

Load Curve Modeling Based on Behavior Analysis of Distributed power Customers

Load Curve Modeling Based on Behavior Analysis of Distribute...

引用

2019 4th Asia Conference on power and Electrical Engineering (ACPEE 2019)

作者： Xinyang HAN Yu ZHANG Yuqiao JIAO Yue ZHANG Yanjing QU Min DING State Grid Energy Research Institute School of Automation China University of Geosciences Hubei Key Laboratory of Advanced Control and Intelligent Automation for Complex System State Grid Shanghai Municipal Electric Power Company

As renewable power generation directly affects the customers' traditional electricity behavior and then offsets the power load,this paper proposes a load curve modeling method for renewable power customers based on the behavior ***,customers' active behavior is represented by the quantity of active customer *** on the analysis of customer behaviors,a modeling method for the quantity of active customer households is proposed based on Markov Chain Monte Carlo ***,with the inputs as the quantity of active customer households and time of photovoltaic power generation,an inference model based on fuzzy logic is proposed to get the quantity of customer household starting electrical *** combing the average usage time of electrical appliances,load characteristics are analyzed based on usage state of electrical appliance of distributed power ***,the simulation results verify the effectiveness of the proposed method.

关键词： Carlo Monte Markov Load Curve Modeling Based on Behavior Analysis of Distributed power Customers

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：