检索结果-内蒙古大学图书馆

Voltage Characteristic Analysis of Ultra-high Voltage Half-wavelength Transmission system Based on Wave Process Method

引用

Journal of Modern power systems and Clean Energy 2020年第1期8卷 150-158页

作者： Hao Tian Yutian Liu Dong Yang Xiaohui Qin Yantao Zhang Key Laboratory of Power System Intelligent Dispatch and Control of Ministry of Education Shandong UniversityJinanChina State Grid Shandong Electric Power Research Institute JinanChina China Electric Power Research Institute BeijingChina

The voltage characteristics of a half-wavelength transmission(HWLT)system lack mechanism explanation and systematic *** this paper,both the steady-state and fault voltage characteristics are analyzed and explained based on the wave process *** analysis model is established for HWLT lines and wave propagation equations with different terminal conditions are *** steady-state conditions,voltage profiles along HWLT lines are depicted and partial overvoltage occurs when there is an overload or low-power *** addition,fault voltage characteristics are analyzed under load-rejection or short-circuit *** series resonance overvoltage will happen when short-circuit faults occur at certain positions and its peak value is influenced by grid strength or fault ***,a refined transmission line model is presented to consider non-ideal factors and simulation results demonstrate that geomorphic conditions and electromagnetic environments influence line voltage characteristics to a certain extent.

关键词： Half-wavelength transmission wave process method steady-state voltage fault voltage non-ideal factor

来源：评论

学校读者我要写书评

暂无评论

An On-line Capacitor Condition Monitoring Method Based on Switching Frequencies for Modular Multilevel Converters 4

An On-line Capacitor Condition Monitoring Method Based on Sw...

引用

4th International Conference on Energy, Electrical and power Engineering, CEEPE 2021

作者： Hu, Jiayu Qiu, Guanqun Wang, Weiyao Ran, Li Ma, Ke Jiang, Huaping Chongqing University State Key Laboratory of Power Transmission Equipment and System Safety and New Technology Chongqing400044 China Shanghai Jiao Tong University Key Laboratory of Control of Power Transmission and Conversion Shanghai200240 China

ISBN: (纸本)9781665433631

The modular multilevel converter (MMC) is developing rapidly as a key technology for future grid applications. Submodule capacitor reliability is a major concern. Among these reliability problems, capacitor failures accounted for about one-third. Therefore, it is meaningful to monitor the aging of the capacitor and determine when to change it. In this paper, a condition monitoring method is proposed to record the real-time IGBT switching frequencies compared with their initial values. With a Back Propagation Neural Network (BPNN), the relationship between the switching frequencies and capacitances is mapped. This method can be easily integrated into the controller without additional sensors. simulation results are presented to verify the feasibility of the proposed method. It is showed that the max error of the estimated capacitance is 0.84%. © 2021 IEEE.

关键词： Condition monitoring

来源：评论

学校读者我要写书评

暂无评论

Predictive Optimal control of Grid-connected Photovoltaics to Support system Frequency 5

Predictive Optimal Control of Grid-connected Photovoltaics t...

引用

5th IEEE International Electrical and Energy Conference, CIEEC 2022

作者： Lu, Zhi Wang, Xiaohui Tian, Xu Wang, Shibin Zhang, Guihong Chen, Qichao Shandong University Key Laboratory of Power System Intelligent Dispatch and Control of Ministry of Education School of Electrical Engineering Jinan China State Grid Qinghai Electric Power Company Economic Research Institute State Grid Corporation of China Xining China State Grid Economic and Technological Research Institute CO . Ltd State Grid Corporation of China Bejing China

ISBN: (数字)9781665411042

ISBN: (纸本)9781665411042

With the high penetration of renewable energy in modern power systems, the necessity for photovoltaics (PVs) to support system frequency tends to be apparent. In view of limited available energy, the manner for PVs to participate the system supporting deserves studies. In this paper, a frequency supporting strategy of the grid-connected PVs based on optimal control and predictive algorithm is proposed. Considering the constraints of available energy and the objective to mitigate the frequency deviation, an optimization model is formulated to derive the optimal reference for PV outputs by Gauss pseudo-spectral method. On this basis, the model predictive control strategy is used to track the optimal reference curve, which is expected to demonstrate a better dynamic response. Finally, a simulation example is constructed in PSCAD/EMTDC to validate the correctness and the superiority of the proposed frequency supporting strategy for PVs. © 2022 IEEE.

关键词： Model predictive control

来源：评论

学校读者我要写书评

暂无评论

P2P transaction method for distributed energy prosumers based on reputation value

引用

Global Energy Interconnection 2023年第3期6卷 308-323页

作者： Tao Jiang Ting Hua Hao Xiao Linbo Fu Wei Pei Tengfei Ma Key Laboratory of Modern Power System Simulation and Control&Renewable Energy Technology Ministry of Education(Northeast Electric Power University)Jilin 132012P.R.China Institute of Electrical Engineering Chinese Academy of Sciences Beijing 100190P.R.China School of Electronic Electrical and Communication Engineering(EECE)University of Chinese Academy of SciencesBeijing 100049P.R.China

Adding a reputation incentive system to peer-to-peer(P2P)energy transactions can encourage prosumers to regulate their trading behavior,which is important for ensuring the efficiency and reliability of P2P *** study proposed a P2P transaction mechanism and game optimization model for prosumers involved in distributed energy sources considering reputation-value ***,the deviation of P2P transactions and the non-consumption rate of distributed renewable energy in P2P transactions were established as indicators to quantify the influencing factors of the reputation value,and a reputation incentive model of P2P transactions for prosumers was ***,the penalty coefficient was applied to the cost function of the prosumers,and a non-cooperative game model of P2P transactions based on the complete information of multi-prosumers was ***,the Nash equilibrium problem was transformed into a nonlinear optimization problem by constructing the modified optimal reaction function,and the Nash equilibrium solution of the game was obtained via a relaxation ***,the modified IEEE 33-node test system based on electricity market P2P and an IEEE 123-node test system were used to analyze and verify the cost and P2P participation of prosumers considering the reputation *** results show that the addition of the reputation incentive system can encourage prosumers to standardize their interactive transaction behavior and actively participate in P2P *** can also improve the operation efficiency of the power grid and promote the perfection of the P2P transaction mechanism.

关键词： P2P Prosumer Non-cooperative game Reputation value Multi-agent of interest Operation optimization

来源：评论

学校读者我要写书评

暂无评论

Closed-loop simulation Method of Stability control system Based on Virtual Component Technology

Closed-loop Simulation Method of Stability Control System Ba...

引用

IEEE Conference on Energy Internet and Energy system Integration (EI2)

作者： Qinfeng Ma Yihua Zhu Mingshun Liu Dongxu Chang Qingxin Pu Chengxiang Li Power Dispatching Control Center of Guizhou Power Grid Co. Ltd Guizhou China State Key Laboratory of HVDC Electric Power Research Institute China Southern Power Grid Guangzhou China National Energy Power Grid Technology R&D Centre Guangzhou China CSG Key Laboratory for Power System Simulation Electric Power Research Institute China Southern Power Grid Guangzhou China Guangdong Provincial Key Laboratory of Intelligent Operation and Control for New Energy Power System Guangzhou China

The stability control system is an important means to ensure the safe and stable operation of the power system. In view of the shortcomings of the existing offline/real-time simulation test methods, a closed-loop simulation scheme based on virtual component technology is proposed. The virtual component technology of the stability control device is researched, and the virtualization method of the external hardware interface of the device is designed. On this basis, a closed-loop simulation framework of the stability control system under the offline/real-time simulation test environment is proposed. The functional logic of each component under the framework are analyzed. The calculation and feedback process of the entire closed-loop simulation system are analyzed in depth, which effectively solves the difficulty of simulation analysis and test verification of large-scale stability control system, providing a new method for the research and verification of stability control system strategy.

关键词： Analytical models Process control system integration power system stability control systems Stability analysis Hardware

来源：评论

学校读者我要写书评

暂无评论

A Summary of Research on Combustion Stability of Coal-fired power Station Boilers

A Summary of Research on Combustion Stability of Coal-fired ...

引用

2021 China Automation Congress, CAC 2021

作者： Cai, Guoyuan Niu, Yuguang Liu, Xuefei State Key Laboratory of Alternate Electrical Power System with Renewable Energy Sources Beijing China School of Control and Computer Engineering North China Electric Power University Beijing China

ISBN: (纸本)9781665426473

The research on the combustion stability of coal-fired power plant boilers is related to the safe operation and economic benefits of the boiler. The combustion stability judgement plays an important role for the assessment of flexibility retrofit with coal-fired power plants participating in deep peak-regulating operation. Therefore, the study of combustion stability judgment has always been a hot research direction. This paper briefly introduces the development history of boiler flame combustion stability research, and focuses on two popular research directions in this field in recent years, namely flame image combustion stability detection method and multiinformation fusion combustion Stability testing methods, briefly summarize the development trends of these two research directions and their respective advantages. Then, the current research status and problems in this field are put forward three aspects of thinking and suggestions. Finally, several problems that need to be solved in the future development of combustion stability research are summarized. © 2021 IEEE

关键词： Coal fired power plant

来源：评论

学校读者我要写书评

暂无评论

A LiDAR-Assist Yaw Misalignment Compensation Method Based on Machine Learning Algorithms

A LiDAR-Assist Yaw Misalignment Compensation Method Based on...

引用

Chinese control Conference (CCC)

作者： Pei Chen Zhongwei Lin Zihan Zhang Zhen Xie State Key Laboratory of Alternate Electrical Power System with Renewable Energy Sources School of Control and Computer Engineering North China Electric Power University Beijing P. R. China

Yaw misalignment is common in the yaw system control of wind turbines, resulting in reduced power generation efficiency and increased load. The advantage of LiDAR is that the accuracy of wind measurement is greatly improved, while its disadvantage is that the cost remains high. In this paper, an efficient machine learning method for estimating LiDAR measurement, XGBoost, is used to establish the data-driven wind turbine yaw misalignment compensation framework. To choose a suitable algorithm, four machine learning algorithms are studied, namely Linear Regression, Random Forest, Gradient Boosting and XGBoost. Moreover, to verify the effectiveness of the proposed method, a 2MW WT was taken as the research object for filed testing, and the power generation was quantitatively evaluated under the three strategies of wind vane control, LiDAR control and ML algorithm control. The results show that the proposed yaw misalignment compensation method is feasible for field application. In this way, the yaw-to-wind error can be mitigated even after the LiDAR is removed.

关键词：

来源：评论

学校读者我要写书评

暂无评论

Research and Application of Simplified Service Bus in New Generation Dispatching Technical Support system and Heterogeneous system 6

Research and Application of Simplified Service Bus in New Ge...

引用

6th IEEE Conference on Energy Internet and Energy system Integration, EI2 2022

作者： Qiang, Yi Shupeng, Wan Zhemin, Wang Weihua, He Ping, Zhang Feng, Zhang NARI Technology Co. Ltd System R&D Center Nanjing China State Grid Shanxi Electric Power Co. Ltd Taiyuan China State Key Laboratory of Smart Grid Protection and Control System R&D Center Nanjing China

ISBN: (纸本)9798350347159

With the rapid development of UHV AC / DC hybrid power grid, in order to cope with the large-scale access of new energy, the power market reform has been continuously promoted. Therefore, it is proposed to build a new generation of dispatching technical support system to meet the needs of future power system development and safe, stable and high-quality operation. This paper proposes a simplified service bus that supports a new generation of service-oriented architecture, and meets the deployment characteristics of cloud terminals that are cross platform, lightweight, easy to deploy, open and efficient. The simplified service bus can well meet the location independent characteristics and be easily deployed in and out of the system. The flexible protocol processing mode cooperating with the gateway can meet the needs of accessing the services of the system and external systems. At the same time, it supports multiple man-machine network and automatic switching of service network shutdown under N-1 mode, which greatly improves the availability and stability of the system, Which Provide a strong guarantee for the safe, stable and efficient operation of the new generation system. © 2022 IEEE.

关键词： Gateways (computer networks)

来源：评论

学校读者我要写书评

暂无评论

Capacity Allocation of Energy Storage and Synchronous Condenser for Wind-photovoltaic-thermal-storage Combined Transmission system

Capacity Allocation of Energy Storage and Synchronous Conden...

引用

2021 IEEE Sustainable power and Energy Conference, iSPEC 2021

作者： Zhu, Zimin Liu, Zhen Duan, Qingxi Xu, Zhi Sun, Bin Mei, Hui Electric Power Research Institute State Grid Xinjiang Electric Power Co. Ltd. Xinjiang Electric Power System Whole Process Simulation Key Laboratory Urumqi China Southeast University School of Electrical Engineering Nanjing China

ISBN: (纸本)9781665414395

In order to solve the problems of the consumption of new energy, the coexistence of wind and solar abandonment and insufficient power supply support capacity, as well as the stability of the widespread power grid in northwest China, a method for capacity allocation of energy storage and synchronous condenser for wind-photovoltaic-thermal-storage combined transmission system is proposed. Firstly, based on the complementary characteristics of wind-photovoltaic-thermal-storage, a typical architecture of wind-photovoltaic-thermal-storage combined transmission system is established and analyzed. Secondly, by taking the system equivalent annual revenue consisting of system equivalent annual electricity sales revenue, units investment, operation and maintenance costs, system equivalent annual assessment costs and carbon emission costs, as the objective function, the capacity allocation optimization model of energy storage and synchronous condenser for wind-photovoltaic-thermal-storage combined transmission system is constructed. Finally, case study based on a power grid planning data of a certain area in northwest China in 2025 is carried out to verify that the allocation method can effectively increase system revenue, promote wind and photovoltaic consumption and maintain a stable system voltage. © 2021 IEEE.

关键词： Digital storage

来源：评论

学校读者我要写书评

暂无评论

Bi-Level Coordinated Expansion Planning of High-Pv-Penetration Active Distribution Networks Incorporating Multiple Flexible Resources Considering Wgan-Gp-Based Uncertainty Generation

SSRN

引用

SSRN 2024年

作者： Li, Jianjing Sun, Kai Sun, Bo Li, Fan School of Control Science and Engineering Shandong University Jingshi Road 17923 Jinan250061 China State Key Laboratory of Power System Operation and Control Department of Electrical Engineering Tsinghua University Beijing100084 China

Integrating high-penetration random photovoltaics (PVs) into the active distribution network (ADN) often causes overvoltage issues, which can even trigger ADN failures. To accommodate high-penetration PVs integration while maintaining economic efficiency and flexibility of ADN, a bi-level collaborative expansion planning model considering uncertainty generation and reduction is proposed. Based on described uncertainty scenarios of PV and load obtained by proposed Wasserstein Generative Adversarial Network with Gradient Penalty and K-means method, upper level firstly configures soft open points to adjust the ADN topology, then optimizes the siting and sizing of PVs, electric vehicle charging stations, energy storage systems, and active management resources (on-load tap changers, and static var compensators) with minimum investment cost. Lower level uses multi-objective mixed-integer second-order cone programming (MISOCP) model with network loss, PV curtailment and voltage deviation of different attributes to optimize ADN scheduling. To solve this planning model, a hybrid algorithm combining adaptive particle swarm optimization algorithm and SOCP with the technique for order preference by similarity to an ideal solution is presented. Finally, the presented model was tested in actual rural 41-bus and urban 40-bus ADN of Gansu, China, demonstrating that total costs decreased by 14.4% and 12.5% respectively compared to plans without active management resources. © 2024, The Authors. All rights reserved.

关键词： Particle swarm optimization (PSO)

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：