检索结果-内蒙古大学图书馆

8th Renewable power Generation Conference (RPG 2019)

作者： Y. H. Ren P. Song X. S. Wang R. F. Shi School of Control and Computer Engineering North China Electric Power University Beijing 102206 PR China State Grid Jibei Electric Power Research Institute North China Electric Power Research Institute Co. Ltd. Beijing 100045 China Grid-connected Operation Technology for Wind-Solar Storage Hybrid System State Grid Corporation Key Laboratory Beijing 100045 China State Grid Jibei Electric Power Research Institute North China Electric Power Research Institute Co. Ltd. Beijing 100045 China

ISBN: (数字)9781839531248

ISBN: (纸本)9781839531255

When the wind turbine adopts the rotor inertia control to participate in grid frequency regulation, it is easy to cause the second frequency drop, which will be more serious when applied to the wind farm. To solve this problem, the influence of wind speed on the unit's ultimate support time under the constant power support mode is analyzed quantitatively and wind turbine recovery time is defined. The functional relationship between the unit's support time and recovery time suitable for engineering application is given. A wind farm frequency regulation optimization model aiming at the longest supporting time of all units in the whole station is established, and the wind farm coordinated frequency regulation control strategy based on decentralized exit is proposed, taking full account of capacity differences of units under different working conditions. simulation examples show that the real-time coordination of the exit of the wind turbine frequency regulation can effectively alleviate the secondary frequency drop problem of a wind farm.

关键词：

来源：评论

学校读者我要写书评

暂无评论

Transient characteristics and adaptive fault ride through control strategy of DFIGs considering voltage phase angle jump

引用

Journal of Modern power systems and Clean Energy 2017年第5期5卷 757-766页

作者： Xinshou TIAN Yongning CHI Weisheng WANG Gengyin LI Haiyan TANG Zhen WANG State Key Laboratory of Operation and Control of Renewable Energy&Storage Systems China Electric Power Research InstituteHaidian DistrictBeijing 100192China State Key Laboratory of Alternate Electrical Power System with Renewable Energy Sources North China Electric Power UniversityChangping DistrictBeijing 102206China

Wind power in China has experienced fast development in recent years. However, areas rich in wind power resources are often far away from loads centers,which leads to weak connection between wind turbines and power grid. When a grid fault occurs, new transient characteristics in weak grid integrated with doubly-fed induction generators(DFIGs) may present, such as voltage phase angle jump. Current control strategies for wind turbine with strong grid connection are hard to be adapted under weak gird connection. This paper explores the transient characteristics of DFIGs under voltage phase angle jump through analyzing the operation and control characteristics of DFIGs connected into weak grid when the voltage phase angle jumps. Fault ride through(FRT) control strategy of DFIGs based on adaptive phase-locked loop is proposed to adapt weak grid condition. The reference frame of the proposed strategy will be changed in real-time to track the operation condition of DFIGs according to the terminal voltage, and different phase tracking method is adopted during the grid fault. Field data analysis and time domain simulation are carried out. The results show that voltage phase angle jumps when a grid fault occurs, which weakens the FRT capability of DFIGs, and the proposed FRT control strategy can optimize transient characteristics of DFIGs, and improve the FRT capability of DFIGs.

关键词： DFIGs Voltage phase angle jump Transient characteristics Adaptive FRT control strategy

来源：评论

学校读者我要写书评

暂无评论

On engineering game theory with its application in power systems

引用

control Theory and Technology 2017年第1期15卷 1-12页

作者： Shengwei MEI Wei WEI Feng LIU Department of Electrical Engineering and Applied Electronics Technology Tsinghua Universily Beijing 100084 China State Key Laboratory of Control and Simulation of Power Systems and Generation Equipments Tsinghua University Beijing 100084 China

Due to its capability of solving decision-making problems involving multiple entities and objectives, as well as complex action sequences, game theory has been a basic mathematical tool of economists, politicians, and sociologists for decades. It helps them understand how strategic interactions impact rational decisions of individual players in competitive and uncertain environment, if each player aims to get the best payoff. This situation is ubiquitous in engineering practices. This paper streamlines the foundations of engineering game theory, which uses concepts, theories and methodologies to guide the resolution of engineering design, operation, and control problems in a more canonical and systematic way. An overview of its application in smart grid technologies and power systems related topics is presented, and intriguing research directions are also envisioned.

关键词： Decision making engineering game theory power system smart grid technology

来源：评论

学校读者我要写书评

暂无评论

Analysis and control to the Ultra-Low Frequency Oscillation in Southwest power Grid of China: A Case Study

Analysis and Control to the Ultra-Low Frequency Oscillation ...

引用

第30届中国控制与决策会议

作者： Chao Zheng Guoqiang Ding Baisi Liu Xin Zhang Jiawei Wang Ancheng Xue Tianshu Bi China Electric Power Research Institute State Key Laboratory of Alternate Electrical Power System with Renewable Energy Source North China Electric Power University State Grid Southwest Power Control Center

The ultra-low frequency oscillations（ULFO） are found in the future Southwest power Grid under some faults, which will asynchronously interconnect with the state Grid via the HVDC and VSC-HVDC before the end of 2018. In this paper, the phenomenon of ULFO in the asynchronous interconnected Southwest power Grid is introduced. And then, with the oscillation energy flow and the amplitude-phase analysis for the ULFO, the energy characteristics of each power plant participating in ULFO are revealed, i.e., the ULFO are mainly between the hydropower plants and the thermal power plants. Furthermore, with the analysis of damping characteristics of main hydropower plants, the cause of the ULFO, i.e., lacking of damping in the hydropower plant is revealed. Upon the above results, an example of suppressing the ULFO with the approach of control parameters tuning for the governor of the dominant generators is presented.

关键词： Asynchronous interconnection Ultra-low frequency oscillation Governor Oscillation energy Phase

来源：评论

学校读者我要写书评

暂无评论

Status Evaluation of Secondary system in Intelligent Substation 2

Status Evaluation of Secondary System in Intelligent Substat...

引用

2017 IEEE 2nd Information Technology, Networking, Electronic and Automation control Conference (ITNEC 2017)

作者： Fanbin Zhang Zhanjun Gao Yao Zhao Yan Zhao Key Laboratory of Power System Intelligent Dispatch and Control (Shandong University) Ministry of Education State Grid Shandong Electric Power Company

ISBN: (纸本)9781509064151;9781509064144

With the rapid development of intelligent substation, the continuous progress of the condition-based maintenance of intelligent substation has already become very urgent. Status evaluation is the main stage of condition-based maintenance. Its purpose is to determine the health status of the equipment, and be able to timely maintenance before the failure occurred. The paper focuses on the research on the status evaluation methods. This paper makes clear the scope of the evaluation and establishes a evaluation system of secondary system in intelligent substation on condition of the existing standards and research. It uses fuzzy mathematical algorithm to establish the evaluation algorithm model. Meanwhile, it introduces two new fuzzy sets to evaluate its status more accurately. This paper also uses the method of BP artificial neural network to determine the weight of each kind of evaluation index, and finally it completes the evaluation of the secondary system in intelligent substation.

关键词： intelligent substation status evaluation secondary system fuzzy mathematical algorithm BP neural network

来源：评论

学校读者我要写书评

暂无评论

Analysis of Ultra-Low Frequency Oscillation in Southwest power Grid Based on Measurement Data

Analysis of Ultra-Low Frequency Oscillation in Southwest Pow...

引用

第37届中国控制会议

作者： Guoqiang Ding Ancheng Xue Chao Zheng Jiawei Wang Baisi Liu Xin Zhang Tianshu Bi State Key Laboratory of Alternate Electrical Power System with Renewable Energy Source North China Electric Power University State Grid Southwest Power Control Center China Electric Power Research Institute

The ultra-low frequency oscillation(ULFO) is found in the future Southwest power Grid under some faults, which will asynchronous interconnect with the state Grid via the HVDC and VSC-HVDC at the end of the 2018. This paper introduces the phenomenon of ultra-low frequency oscillation of asynchronous interconnection in Southwest power Grid and analyzes the characteristics of ultra-low frequency oscillation with measurement data. In details, the energy flow calculated with the measure data is used to evaluate the contribution of each unit to the ultra-low frequency oscillation and locate disturbance sources of the oscillation. Meanwhile, the amplitude-phase characteristic for the oscillation at the different power plant is used to identify that the oscillation is mainly manifests between the hydropower units and the thermal power units. Furthermore, the damping characteristics of the excitation and governor system analysis reveals that the main factor of the oscillation is the lack of the damping or negative damping characteristic of the hydro-turbine governor systems.

关键词： Asynchronous interconnection Ultra-low frequency oscillation Oscillation energy Phase Damping

来源：评论

学校读者我要写书评

暂无评论

control of the Ultra-Low Frequency Oscillation in Southwest power Grid of China Based on Damping Characteristic Analysis

Control of the Ultra-Low Frequency Oscillation in Southwest ...

引用

第37届中国控制会议

作者： Jiawei Wang Ancheng Xue Chao Zheng Guoqiang Ding Baisi Liu Xin Zhang Tianshu Bi State Key Laboratory of Alternate Electrical Power System with Renewable Energy Source North China Electric Power University China Electric Power Research Institute State Grid Southwest Power Control Center

At the end of 2018, the Southwest power Grid will asynchronously interconnect with the state Grid, and the tests show that it exists a high proportion of ultra-low frequency oscillation（ULFO）, which threatening the operation of system. Based on the governor system model, the negative damping mechanism of ULFO is analyzed, and the suppression measure of adjusting the PI parameters of governor system is given. The details are as follows: in this paper, the phenomenon of ULFO in the Southwest power Grid is introduced. And then based on detailed model, the mechanical damping coefficient of the governor system of each generator under the ultra-low frequency is calculated. The results show that the negative damping provided by hydro-turbine governor system is one of the main reasons causing the oscillation. Furthermore, the impact of PI parameters of governor system on the damping characteristics of hydropower generators is analyzed. Moreover, the idea to suppress ULFO based on adjusting the PI parameters is given, together with the considering for the influence of parameters on the transient and steady-state characteristics. Finally, simulation results show that the proposed PI parameters adjusting method to governor system could suppress the ULFO.

关键词： Ultra-low frequency oscillation governor system mechanical damping coefficient suppression measure

来源：评论

学校读者我要写书评

暂无评论

Multi-objecive LPV control of wind energy conversion system under wide-scale operating conditions

Multi-objecive LPV control of wind energy conversion system ...

引用

8th Renewable power Generation Conference (RPG 2019)

作者： Chenzhi Qu Zhongwei Lin Zhen Xie Yilin Li Shangang Zhang Xiongwei Li Zhenqing Duan State Key Laboratory of Alternate Electrical Power System with Renewable Energy Sources School of Control and Computer Engineering North China Electric Power University Beijing 102206 PR China CHNENERGY (Shandong) New Energy Co. Ltd Jinan 250099 PR China Guodian New Energy Technology Research Institute Co. Ltd Beijing 102209 PR China

ISBN: (数字)9781839531248

ISBN: (纸本)9781839531255

Wind energy conversion system (WECS) is essentially a time-varying system with high nonlinear characteristics, which leads to the difficulty of guaranteeing the control performance in a wide-scale operating conditions for the conventional linear control strategies. In this paper, a linear-parameter-varying (LPV) gain-scheduled controller is proposed for variable-speed-variable-pitch wind turbines above rated wind speed, which improves both steady-and dynamic-response performances under wide-scale operating conditions. Firstly, the H 2 /H ∞ technique is adopted to reduce the rated power tracking errors, while enhancing the robustness against high-frequency turbulence. Secondly, the regional pole placement technique is applied on WECS, which builds the connections to the dynamic response performance. To verify the effectiveness of the proposed method, the simulation is implemented on the NREL 5 MW wind turbine, which is compared with the conventional local linear control strategy with a full analysis on the related performances.

关键词：

来源：评论

学校读者我要写书评

暂无评论

Fast Optimal Dispatch of Renewable Energy Sources in Distribution Networks

Fast Optimal Dispatch of Renewable Energy Sources in Distrib...

引用

2018 2nd International Workshop on Renewable Energy and Development (IWRED 2018)

作者： Wenbo Li Keqiang Li Liang Wang Bo Chen Xin Li Guojun Teng State Grid Shandong Electric Power Research Institute Key Laboratory of Power System Intelligent Dispatch and Control of Ministry of Education (Shandong University) Shandong Electric Power Company

With the increasing penetration of distributed renewable energy sources such as photovoltaic and wind power generators in distribution networks, overvoltage problems occurred as a result of the reversed power flow. The randomness and intermittence of power outputs of the renewable energy sources make the operations of distribution systems complex at the same time. This paper proposes a simplified optimal dispatch algorithm for fast renewable energy sources power control to overcome voltage problems and permit better performance for distribution systems. Case study demonstrates the accuracy and efficiency of the optimal dispatch method proposed.

关键词：

来源：评论

学校读者我要写书评

暂无评论

CIRCUIT THEORY-BASED METHOD FOR power LOSS ESTIMATION IN DISTRIBUTION systemS WITH DISTRIBUTED GENERATOR

CIRCUIT THEORY-BASED METHOD FOR POWER LOSS ESTIMATION IN DIS...

引用

International Conference on Renewable power Generation

作者： Juntai Cui Li Zhang Boyi Zhang Keqiang Li Key Laboratory of Power System Intelligent Dispatch and Control Shandong University Jinan China State Grid Shandong Economic and Technological Research Institute Jinan China

ISBN: (数字)9781839531248

ISBN: (纸本)9781839531255

With the rapid developing of renewable energy, it has become a trend that a large number of distributed generations (DGs) integrate into distribution network. Existing distribution energy loss calculation method cannot quickly evaluate the effect of DGs on the distribution loss. To explore new method, the application of circuit theory-based loss calculation method is discussed in distribution network with DGs. Considering that DG has the ability of voltage regulation, namely it can play an important role in distribution voltage support, the grid connection nodes of DGs are equivalent to voltage source nodes, while the other load nodes are equivalent to current source nodes. Then the distribution loss are calculated in three parts: the loss caused by the voltage source alone, the loss caused by the single action of the current source, and the loss related to the both sources and network structure parameters. Loss calculation and discussion are done the 33-bus test distribution system with DGs. The applicability of the method in quickly evaluating the power loss of DG integrated distribution system is analysed and some valuable observation is also presented.

关键词： DISTRIBUTION system power LOSS DISTRIBUTED GENERRATOR CIRCUIT THEORY-BASED METHOD SUPERPOSITION

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：