检索结果-内蒙古大学图书馆

2020 IEEE Sustainable Power and Energy Conference, iSPEC 2020

作者： Huang, Tiangang State Key Laboratory of Smart Grid Protection and Control Nanjing China

ISBN: (纸本)9781728191645

The high proportion of renewable energy into the power grid, say, the large-scale wind power generation connected to the power grid, is the key approach to achieve the clean and low-carbon energy transition. Under the premise of ensuring power grid's safe and stable operation, it is necessary to study the influence of wind power capacity expansion on the transient angle stability (TAS). Aiming at several typical dominant modes in Qinghai power system, which holds many new energy resources, the sensitivity of wind power capacity expansion in different locations to the TAS, as well as its key influence factors and feasible explanations, are explored. It may lay the foundation of the location optimization of wind power capacity expansion. © 2020 IEEE.

关键词： Transients

来源：评论

学校读者我要写书评

暂无评论

National Carbon Market Supply Demand Balance Analysis Based on Unit Level Heterogeneous Characteristic Modeling

National Carbon Market Supply Demand Balance Analysis Based ...

引用

IEEE Innovative smart grid Technologies - Asia (ISGT Asia)

作者： Yening Lai Yifei Zhang Jie Huang Xuetong Chen NARI Technology Co. Ltd. State Key Laboratory of Smart Grid Protection and Control Nanjing China

ISBN: (纸本)9798350399677

The national carbon market is the major market mechanism supporting China's “30•60” target. This market involves natural sciences, such as energy technology and climate science, and social sciences, such as politics and economics related to energy economy, policy, and human behavior. This makes the carbon market a typical cyber-physical-social system in energy (CPSSE). This paper focuses on modeling objective physical parameters associated with market participants. The paper proposes a model and value assignment method for unit-level heterogeneous parameters and constructs a unit-level dataset of national carbon market participants. The influences of the heterogeneous levels of different parameters on the micro supply-demand balance are then evaluated. The study details the quantitative influences of the proportion of units without key parameter measurements and the shape of the distribution of the units' coal consumption rates. This study establishes a unit-level model and parameter foundation for conducting a national carbon market hybrid simulation.

关键词： Economics Analytical models Shape Shape measurement Asia Carbon dioxide Particle measurements

来源：评论

学校读者我要写书评

暂无评论

laboratory and field evaluation of a low-cost optical particle sizer

引用

Journal of Environmental Sciences 2024年第8期142卷 215-225页

作者： Mingzhen Tang Yicheng Shen Yanzhen Ge Jian Gao Chong Wang Liqing Wu Shuchun Si State Key Laboratory of Environmental Criteria and Risk Assessment Chinese Research Academy of Environmental SciencesBeijing 100012China Jinan Grid-Based Supervision Center of Ecological and Environmental Protection Jinan 250100China Tai’an Ecological Environment Protection Control Center Tai’an 271000China School of Physics Shandong UniversityJinan 250013China

Low-cost sensors are widely used to collect high-spatial-resolution particulate matter data that traditional reference monitoring devices *** addition to the mass concentration,the number concentration and size distribution are also fundamental in determining the origin and hazard level of particulate ***,low-cost optical sensors have been improved to establish optical particle sizers(OPSs).In this study,a low-cost OPS,the Nova SDS029,is introduced,and it is evaluated in comparison to two reference instruments—the GRIMM 11-D and the TSI *** first tested the sizing accuracy using polystyrene latex ***,we assessed the mass and number size distribution accuracy in three application scenarios:indoor smoking,ambient air quality,and mobile *** evaluations suggest that the low-cost SDS029 rivals research-grade optical sizers in many *** example,(1)the particle diameters obtained with the SDS029 are close to the reference instruments(usually<10%)in the 0.3-5μm range;(2)the number of particles and mass concentration are highly correlated(r≥0.99)with the values obtained with the reference instruments;and(3)the SDS029 slightly underestimates the number concentration,but the derived PM_(2.5)values are closer to monitoring station than the reference *** successful application of the SDS029 in multiple scenarios suggests that a plausible particle size distribution can be obtained in an easy and cost-efficient *** believe that low-cost OPSs will increasingly be used to map the sources and risk levels of particles at the city scale.

关键词： Optical particle sizer Particle size distribution Low-cost sensor Evaluation Field application

来源：评论

学校读者我要写书评

暂无评论

Attack-Aware Capability Assessment Method Based on Specific Semantic Search

Attack-Aware Capability Assessment Method Based on Specific ...

引用

International Conference on Electronic Engineering and Informatics (EEI)

作者： Daojuan Zhang Qi Zhao Yuman Wang Shu Li Zheng Tian Yizhen Sun State Grid Laboratory of Power Cyber-Security Protection and Monitoring Technology State Grid Smart Grid Research Institute co. Ltd Beijing China Hunan Provincial Key Laboratory of Internet of Things in Electricity State Grid information & Communication Company of Hunan Electric Power Corporation Changsha China

ISBN: (数字)9798350353594

ISBN: (纸本)9798350353600

In this paper, we propose an attack perception capability assessment method based on the specific semantic search for the problem of attack perception capability assessment of security protection equipment for power monitoring systems. The method aims to improve the recognition and localization accuracy of common attacks by accurately correlating the output products of security equipment with the execution of attack test cases. The research employs an attack-specific semantic generation technique that combines attack attribute values with timestamps to form specific semantics for subsequent matching. Pattern matching algorithm, specifically the BM (Boyer-Moore) algorithm, is further utilized to match the specific semantics with the output products of the security device Snort to achieve attack localization. Experimental results demonstrate that Snort exhibits high accuracy in perceiving the majority of attack types and exhibits an enhanced perception rate compared to certain baseline methods. In summary, the method proposed in this paper effectively improves the sensing ability of security equipment to attacks on the power monitoring system and provides a new idea for the performance evaluation of security protection equipment.

关键词： Location awareness Performance evaluation Accuracy Semantic search Sensors Security protection Informatics Monitoring Pattern matching

来源：评论

学校读者我要写书评

暂无评论

Regulation performance of virtual synchronous generator applied in renewable energy system

Regulation performance of virtual synchronous generator appl...

引用

2021 International Conference on Information Technology and Intelligent control, CITIC 2021

作者： Qi, WeiZhi Zha, Daojun Wu, Tonghua Dai, Wei Li, Xindong Hou, Xiaofan State Grid Jiangsu Electric Power Co. Ltd. Nanjing210024 China State Key Laboratory of Smart Grid Protection and Control Nanjing Nanjing 211106 China Nanjing211106 China

The conventional synchronous generator (SG) can regulate the active and reactive power for frequency and voltage stability, when the system fluctuates. In renewable energy generation system (RES), the stability problem of RES can be solved by adding virtual inertia and damping in the control strategy of the grid-connected inverter. The grid-connected inverter and renewable energy system with this kind of control strategy, called as virtual synchronous generator (VSG), acts as a synchronous generator. In this paper, the topology of grid-connected PV array and energy storage system is proposed. The VSG used in grid-connected inverter, is modelled as stator and rotor model by stator voltage equation and rotor motion equation, respectively. Meanwhile, the VSG control mechanism, based on droop control and model of VSG, can be divided as active power-frequency and reactive power-voltage control. Besides, the system stability is analyzed based on small signal model, for the design of inertia and damping. The simulation model is designed by MATLAB/Simulink for the implementation of VSG. In simulation, it is compared that the dynamic regulation performance of VSG with different control coefficient, such as virtual inertia, virtual damping, droop coefficient and integral coefficient. The optimization for regulation performance in simulation provides an appropriate selection method of the control coefficient for VSG. © 2021 Institute of Physics Publishing. All rights reserved.

关键词： Synchronous generators

来源：评论

学校读者我要写书评

暂无评论

Cyber-attack-tolerant Frequency control of Power Systems

引用

Journal of Modern Power Systems and Clean Energy 2021年第2期9卷 307-315页

作者： Chunyu Chen Kaifeng Zhang Ming Ni Ying Wang the School of Electrical and Power Engineering China University of Mining and TechnologyXuzhou 221116China the School of Automation Southeast UniversityNanjing 210096China NARI Group Corporation(State Grid Electric Power Research Institute) Nanjing 211106China NARI Technology Co. Ltd.Nanjing 211106China State Key Laboratory of Smart Grid Protection and Control Nanjing 211106China

Cyber attacks are emerging threats in the Internet of Things applications,and power systems are typical cyber attack *** one of the most essential operation functions,frequency control is threatened by cyber intrusions,and the existing centralized control mode cannot effectively address cyber *** this study,a new distributed cyber-attack-tolerant frequency control scheme is *** distributed control mode also serves as a convenient tool for attack *** designed cyber-attack-tolerant frequency controller adopts the idea of passive fault attenuation,thus simplifying the design *** the aid of graph theory and consensus techniques,distributed integral based and model predictive control(MPC)based controllers are *** with the integral type,the MPC-based controller can simultaneously improve the dynamic responses and the tolerance ability under *** proposed controller is validated via an IEEE benchmark system,and the effectiveness of its application in actual power systems is verified.

关键词： Frequency control cyber attack distributed control passive fault attenuation cyber-attack-tolerant frequency control

来源：评论

学校读者我要写书评

暂无评论

A Frequency control Method that Allows Regulation Sharing among Interconnected control Areas 9

A Frequency Control Method that Allows Regulation Sharing am...

引用

9th Asia Conference on Power and Electrical Engineering, ACPEE 2024

作者： Wang, Lifeng Teng, Xiaobi Lin, Hua Song, Bingbing Qin, Kangping Li, Yutong Chen, Zijie Dispatch and Control Branch Center East China Branch of State Grid Corporation of China Shanghai China SPIC ShanDong Energy Marketing CO. LTD Jinan China Shanghai Jiao Tong University College of Smart Energy Shanghai China Ministry of Education Shanghai Jiao Tong University Key Laboratory of Control of Power Transmission and Conversion Shanghai China

ISBN: (纸本)9798350309638

Current large-scale interconnected power grids predominantly adopt the Tie-Line Bias control (TBC), where each control area is independently responsible for the power balance within its region. However, under this control mode, if a control area within the interconnected grid lacks sufficient frequency regulation capacity, the frequency of the entire interconnected grid can be affected. To allow sharing of frequency regulation capacity across multiple control areas, this article proposes a market scheme for inter-area frequency regulation capacity sharing, along with a supporting frequency control method for interconnected power grids. After meeting their own frequency regulation capacity requirements, control areas can contribute surplus capacity to a regional frequency regulation capacity market. The awarded capacity is then centrally dispatched by the regional grid, with each control area using the TBC mode and the regional grid employing the Flat Frequency control(FFC) mode. Simulation results indicate that, compared to the traditional TBC mode, our proposed scheme effectively improves the frequency quality of the interconnected grid and achieves optimized resource allocation. © 2024 IEEE.

关键词： Electric power system control

来源：评论

学校读者我要写书评

暂无评论

Distribution Network Differential protection Method Based on Dynamic Time Warping Algorithm 1

引用

6th PURPLE MOUNTAIN FORUM on smart grid protection and control, PMF2021

作者： Long, Wei Pan, Shuyan Wu, Hai School of Electrical and Automation Engineering Nanjing Normal University Jiangsu Nanjing210023 China NARI Technology Co. Ltd Nanjing211106 China State Key Laboratory of Smart Grid Protection and Control Nari Group Corporation Jiangsu Nanjing211106 China

ISBN: (数字)9789811671562

ISBN: (纸本)9789811671555

As a new technology, 5G technology has lower cost than optical fiber and comparable transmission speed and carrying capacity, which can improve the performance of distribution network communication system. At the same time, differential protection based on two terminal data cooperation has a new life. However, 5G signal has delay jitter, and the transmission delay of channel may change, which increases the difficulty of synchronization and affects the reliability of differential protection. Therefore, this paper proposes an improved protection method based on dynamic time bending distance, introduces floating threshold as braking value, improves the reliability of protection, and has good adaptability to delay jitter and asynchronous error, which has certain engineering significance. © 2022, The Author(s), under exclusive license to Springer Nature Singapore Pte Ltd.

关键词： Optical fibers

来源：评论

学校读者我要写书评

暂无评论

Design and Optimization of Totem Pole Bridgeless PFC Based on GaN

Design and Optimization of Totem Pole Bridgeless PFC Based o...

引用

International Conference on Wireless Power Transfer, ICWPT 2022

作者： Tang, Mengyang Xue, Pengfei Cheng, Zhangge Yong, Tao Key Laboratory of Smart Grid and Intelligent Control of Nanchong Southwest Petroleum University Nanchong637001 China Taiyuan Power Supply Company State Grid Taiyuan Electric Power Co. Ltd. Taiyuan030012 China Chongqing Sound and Optoelectronics Co. Ltd. Chongqing400000 China

ISBN: (纸本)9789819906307

GaN devices have attracted extensive attention due to their excellent characteristics of high electron mobility. GaN devices can greatly reduce switching loss in hard switching circuits. In order to achieve high efficiency and high power density, GaN devices are applied to totem pole bridgeless PFC topology, the mathematical model of power circuit is established, and the optimal control strategy is proposed based on this model. The change of inductance value caused by different input and output conditions leads to the change of cutoff frequency of the system, which affects the performance of the system. In this paper, a piecewise PI compensation optimization control strategy is proposed. To solve the problem of high total harmonic distortion rate and zero crossing distortion, a duty cycle feedforward control method is introduced. In order to reduce THD, the effect of current loop bandwidth on current harmonics was analyzed qualitatively and optimization strategies were proposed. Finally, the parameters of the control system and the main circuit are designed according to the requirements, and a 1.5kW prototype is developed for experiment, which verifies the correctness of the theoretical analysis and the effectiveness of the optimized control strategy. © 2023, The Author(s), under exclusive license to Springer Nature Singapore Pte Ltd.

关键词： Gallium nitride

来源：评论

学校读者我要写书评

暂无评论

Research on Low Order Harmonic Suppression of Motor Drive System under Two-Phase Rotating Coordinate Frame 17th

Research on Low Order Harmonic Suppression of Motor Drive Sy...

引用

17th Annual Conference of China Electrotechnical Society, CES 2022

作者： Yong, Tao Liu, Jing Li, Wenxiao Yang, Guanjian Tang, Mengyang Miao, Yiru Key Laboratory of Smart Grid and Intelligent Control of Nanchong Southwest Petroleum University Nanchong637001 China State Grid Jiangsu Electric Power Co. LTD. Extra-High Voltage Branch Company Nanjing211002 China College of Electrical and Information Engineering in Hunan University Changsha410082 China State Grid Sichuan Electric Power Company Chengdu610041 China

ISBN: (纸本)9789819904075

Due to nonlinear factors such as dead-time and tube voltage drop, low-order harmonics will be injected into the output voltage of the inverter, resulting in fifth and seventh harmonic distortion of stator current and increasing torque ripple. At the same time, the natural frequency of inductor motor used in electrical vehicle is low, when the motor runs at medium and high speed, the low harmonic frequency of the current coincides with the natural frequency of the motor, resulting in resonance. To solve the above problems, firstly, the simulation and test method of the natural frequency of the IM is studied, and the natural frequency range of the IM is determined. Then, based on the analysis of the harmonic distortion characteristics caused by dead-time and tube voltage drop, a sixth harmonic controller is added to the current inner loop of the vector control system after rotor flux orientation (d-q coordinate), and the design method of the controller parameters is studied. Finally, the simulation model is established, which shows that the theoretical analysis and the proposed harmonic control method are correct and feasible. © 2023, Beijing Paike Culture Commu. Co., Ltd.

关键词： Harmonic distortion

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：