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Modelling and control of doubly fed variable-speed pumped storage units for grid power regulation

The Journal of Engineering 2017年第13期2017卷 745-750页

作者： Zhao Guopeng Zhao Qiang Ren Jiyun Song Xiaofang Han Minxiao State Key Laboratory of Alternate Electrical Power System with Renewable Energy Sources North China Electric Power University Beijing 102206 People's Republic of China School of Electrical and Electronic Engineering North China Electric Power University Beijing 102206 People's Republic of China State Key Laboratory of Smart Grid Protection and Control Nanjing 211006 Jiangsu Province People's Republic of China

With the expending scale of the power grid and the substantial development of renewable energy generation system, the demand for power quality is becoming more and more significant. The doubly fed pumped storage can be an effective method to control the power of the power grid and restrain the power grid fluctuation caused by renewable energy generation. First, this study introduces the structure of doubly fed pumped storage unit, and analyses the mathematical model of reversible hydraulic pump turbine, doubly fed induction generator (DFIG) and control strategy of the converter. On the basis of the model of reversible hydraulic pump turbine and DFIG, control strategies of the dq decoupling and synchronous rotating coordinate system are studied to output the active and reactive power. Second, the models of generating mode and pumping mode for the doubly fed pumped storage unit are established. Third, for the grid power regulation, active power and speed control strategy in generating mode, pumping mode are put forward. Finally, the model of doubly fed pumped storage unit of 300 MW is established in MATLAB/Simulink. The proposed control strategy is verified by the simulation results.

关键词： wind power plants machine control pumped-storage power stations velocity control asynchronous generators power generation control pumps power grids pumping mode doubly fed pumped storage unit grid power regulation active power speed control strategy renewable energy generation system power quality power grid fluctuation reversible hydraulic pump turbine output reactive powers

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Call for papers of ZIJIN-2018 International Forum on smart grid protection and control

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Journal of Modern Power Systems and Clean Energy 2018年第3期6卷 619-619页

作者： state key laboratory of smart grid protection and control, SKL of SGPC State Key Laboratory of Smart Grid Protection and Control SKL of SGPC

It is a pleasure to invite experts and scholars from around the world to participate in the 3rd International Forum on smart grid protection and control, which will be held in Nanjing, Jiangsu Province, China from Aug. 18th to 19th, 2018. The purposes of the forum are to strengthen the international academic exchanges in the field of smart grid protection.

关键词： Call for papers of ZIJIN-2018 International Forum on smart grid protection and control

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Distributed Power Service Restoration Method of Distribution Network with Soft Open Point

Distributed Power Service Restoration Method of Distribution...

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IEEE/IAS Industrial and Commercial Power System Asia (I&CPS Asia)

作者： Shoujing Sun Wei Cong Yaru Sheng Ming Chen Zhen Wei Key Laboratory of Power System Intelligent Dispatch and Control (Shandong University) Jinan China Key Laboratory of Smart Grid of Ministry of Education (Tianjin University) Tianjin China Qingdao Power Supply Company Shandong Electric Power Company State Grid Qingdao China

ISBN: (数字)9781728143033

ISBN: (纸本)9781728143040

Soft open point (SOP) is applied to the power service restoration of the distribution network because of the advantages of flexible control mode and optimizing the operation of the distribution network. Taking advantage of parallel collaborative between independent peer smart terminals unit (STU) in distribution network and information interaction ways of working, distributed power service restoration method of distribution network considering soft open point is put forward, which brings the superiority of SOP in the aspect of power service restoration into full play and avoids the problem of large information collection and calculation in the centralized power service restoration method. Firstly, the structure, control mode and power service restoration model of SOP are introduced, and then the distributed power service restoration method of distribution network with SOP is described, which mainly includes distributed network topology search and the expression and calculation of constraint conditions. Finally, a numerical simulation is carried out to verify the effectiveness of the proposed method.

关键词： Switches Power supplies Network topology Topology Impedance Voltage control Switching circuits

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Design of A Game Theory Based Defense System for Power System Cyber Security

Design of A Game Theory Based Defense System for Power Syste...

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IEEE International Conference on Cyber Technology in Automation, control, and Intelligent Systems

作者： Ming Ni Anurag K. Srivastava Rui Bo Jie Yan NARI Technology Inc. State Key Lab of Smart Grid Protection and Control Nanjing 211106 China Washington State University Pullman WA 99164 USA Midcontinent Independent System Operator Minneapolis 55221 USA

ISBN: (纸本)9781538604915

With numerous information and communication devices deployed in smart grid, cyber security becomes a big challenge faced by all power companies around the globe. This paper first introduces possible cyber-attacks that the observation system and control system in smart grid may face, and then presents examples to illustrate the impact of such attacks. Following that, a cyber security intelligent defense system is proposed which will equip system operators a powerful tool to actively fight hackers and keep the power system secure and stable. The frame work and the implementation methodologies of this defense system are also presented.

关键词： state estimation control systems Power system stability Power measurement Power grids Computer viruses Computer viruses Power grids control systems Power measurement Defense systems Power system stability Network security state estimation Game theory observation system smart grids power systems frame work electricity company

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Reactive Power Coordination control Based on Vsc to Improve Lcc's Ability to Withstand Commutation Failure

SSRN

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SSRN 2023年

作者： Shu, Hongchun Shao, Zongxue Zhao, Wei State Key Laboratory of Collaborative Innovation Center for Smart Grid Fault Detection Protection and Control Jointly Kunming University of Science and Technology Kunming650500 China Faculty of Mechanical and Electrical Engineering Kunming University of Science and Technology Kunming650500 China

In order to suppress the continuous commutation failure of the line commutated converter (LCC) in the multi-infeed DC transmission system, the ability of the voltage commutated converter (VSC) in the hybrid multi-infeed DC transmission system to provide fast reactive power support is fully utilized, and a dynamic reactive power support coordination control strategy based on LCC current error controller and VSC constant AC voltage control is proposed. When the LCC experiences continuous commutation failure, the compensation amount of the extinction angle is closely related to the DC current error. The compensation amount of the extinction angle can be obtained according to the DC current error during the transient process. The reactive power support required by the LCC is calculated based on the compensated extinction angle, and the required reactive power support is prioritized to be added to the outer loop reactive power control of the VSC inverter side. By constructing a test system for doubly-fed DC transmission with flexible DC in PSCAD/EMTDC, the test results have confirmed the efficacy of the proposed dynamic reactive power coordination control strategy. The strategy has demonstrated a remarkable ability to enhance LCC's ability to suppress continuous commutation failure. © 2023, The Authors. All rights reserved.

关键词： Reactive power

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Research on Current Transfer Arc-Extinguishing Technology of Distribution Network

Research on Current Transfer Arc-Extinguishing Technology of...

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

作者： Yi Xu Jianhua Li Xiangjun Zeng Kun Yu Xiaotao Che Fang Liu Hunan Province Key Laboratory of Smart Grids Operation and Control Changsha University of Science & Technology Changsha China State Grid Luoyang Power Supply Company Luoyang China

ISBN: (数字)9781728131375

ISBN: (纸本)9781728131382

The premise of reliable arc extinguishing performance by current transfer arc extinguishing technology is to accurately identify the fault phase. This paper analyzes the neutral point voltage and the relative ground voltage variation law when single-line-to-ground (SLG) fault occurs, and obtains a SLG fault phase selection method. Then, an improved scheme for the fault-phase misjudgment and anti-phase short circuit of the current transfer arc-extinguishing device is proposed to improve its reliability. Finally, the action flow of the current transfer arc extinguishing device is described. The feasibility of the principle of current transfer arc suppression technology and the rationality of the action flow are verified by simulation analysis. The results show that the current transfer arc extinguishing technology can theoretically achieve the purpose of quickly eliminating the arc grounding fault, and help to improve the power supply reliability of the power distribution system.

关键词： Circuit faults Grounding Switches Power supplies Capacitance Monitoring Accidents

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Design of A Game Theory Based Defense System for Power System Cyber Security

Design of A Game Theory Based Defense System for Power Syste...

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“紫金论电”2017智能电网保护和运行控制国际学术研讨会

作者： Ming Ni Rui Bo Jie Yan Anurag K Srivastava NARI Technology Inc. State Key Lab of Smart Grid Protection and ControlNanjing211106China Midcontinent Independent System Operator Minneapolis55221USA Washington State University PullmanWA99164USA

With numerous information and communication devices deployed in smart grid,cyber security becomes a big challenge faced by all power companies around the *** paper first introduces possible cyber-attacks that the observation system and control system in smart grid may face,and then presents examples to illustrate the impact of such *** that,a cyber security intelligent defense system is proposed which will equip system operators a powerful tool to actively fight hackers and keep the power system secure and *** frame work and the implementation methodologies of this defense system are also presented.

关键词： cyber security security defense system Stackelberg Competition Stochastic Game Game Theory

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Predicting impact forces on pipelines from deep-sea fluidized slides:A comprehensive review of key factors

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International Journal of Mining Science and Technology 2024年第2期34卷 211-225页

作者： Xingsen Guo Ning Fan Defeng Zheng Cuiwei Fu Hao Wu Yanjun Zhang Xiaolong Song Tingkai Nian State Key Laboratory of Coastal and Offshore Engineering Dalian University of TechnologyDalian 116024China Department of Civil Environmentaland Geomatic EngineeringUniversity College LondonLondon WC1E 6BTUnited Kingdom Shandong Provincial Key Laboratory of Marine Environment and Geological Engineering Ocean University of ChinaQingdao 266100China State Key Laboratory of Geohazard Prevention and Geoenvironment Protection Chengdu University of TechnologyChengdu 610059China College of Civil Engineering and Architecture Wenzhou UniversityWenzhou 325035China Key Laboratory of Engineering and Technology for Soft Soil Foundation and Tideland Reclamation of Zhejiang Province Wenzhou 325035China Zhejiang International Science and Technology Cooperation Base of Ultra-soft Soil Engineering and Smart Monitoring Wenzhou 325035China School of Geography Liaoning Normal UniversityDalian 116029China China Railway First Survey and Design Institute Group Co. Ltd.Xi’an 710043China Department of Geotechnical Engineering Nanjing Hydraulic Research InstituteNanjing 210024China Wuhan Center China Geological Survey(Central South China Innovation Center for Geosciences)Wuhan 430205China State Key Laboratory of Mining Response and Disaster Prevention and Control in Deep Coal Mines Anhui University of Science and TechnologyHuainan 232001China

Deep-sea pipelines play a pivotal role in seabed mineral resource development,global energy and resource supply provision,network communication,and environmental ***,the placement of these pipelines on the seabed surface exposes them to potential risks arising from the complex deep-sea hydrodynamic and geological environment,particularly submarine *** incidents have highlighted the substantial damage to pipelines due to ***,deep-sea fluidized slides(in a debris/mud flow or turbidity current physical state),characterized by high speed,pose a significant *** assessing the impact forces exerted on pipelines by fluidized submarine slides is crucial for ensuring pipeline *** study aimed to provide a comprehensive overview of recent advancements in understanding pipeline impact forces caused by fluidized deep-sea slides,thereby identifying key factors and corresponding mechanisms that influence pipeline impact *** factors include the velocity,density,and shear behavior of deep-sea fluidized slides,as well as the geometry,stiffness,self-weight,and mechanical model of ***,the interface contact conditions and spatial relations were examined within the context of deep-sea slides and their interactions with *** upon a thorough review of these achievements,future directions were proposed for assessing and characterizing the key factors affecting slide impact loading on pipelines.A comprehensive understanding of these results is essential for the sustainable development of deep-sea pipeline projects associated with seabed resource development and the implementation of disaster prevention measures.

关键词： Deep-sea fluidized slides Pipes Impact forces Shear behavior of slides Interface contact conditions Spatial relation

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Organizational Description System for Digital Twin of Distribution Network Equipment Based on Object-oriented Equipment Model

Organizational Description System for Digital Twin of Distri...

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Power System and Green Energy Conference (PSGEC)

作者： Jingru Zang Jin Xu keyou Wang Lin Peng Zhimin He Zhujian Ou Key Laboratory of Control of Power Transmission and Conversion Ministry of Education Shanghai Jiao Tong University Shanghai China State Grid Smart Grid Research Institute Co. Ltd Nanjing China State Grid Nantong Power Supply Company Nantong China

ISBN: (数字)9798350365573

ISBN: (纸本)9798350365580

Digital twin is a mathematical model of a physical object that can accept real-time data and evolve in real time. The fundamental technology underlying digital twin technology is modeling and simulation. For a distribution network with complex structure and numerous devices, the construction of digital twins is of great significance for equipment management and system analysis. This paper first introduces the object-oriented modeling method and presents an object-oriented equipment model (OEM). Subsequently, an organizational description system for digital twin of distribution network equipment based on object-oriented equipment model is designed, and the concrete implementation method is introduced. Finally, by comparing with the simulation results of PSCAD software, the accuracy of the electromagnetic transient (EMT) simulation program, one of the applications of the proposed system, is verified.

关键词： Object oriented modeling Simulation Distribution networks Production Real-time systems Mathematical models Spatial databases Software Scheduling Digital twins

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Impact of Generation Companies’ Heterogeneous Investment Behaviors on the Effects of Non-fossil Energy Incentive Policies

Impact of Generation Companies’ Heterogeneous Investment Be...

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Sustainable Power and Energy Conference (iSPEC)

作者： Bin Cai Tianran Li Kui Wang Zhiyuan Li Lei Zhu Jun Wen Yusheng Xue State Key Laboratory of Smart Grid Protection and Control NARI Group Corporation/State Grid Electric Power Research Institute Nanjing China NARI School of Electrical and Automation Engineering Engineering Laboratory of Gas-Electricity Integrated Energy of Jiangsu Province Nanjing Normal University Nanjing China China Huaneng Group Co. Ltd Beijing China

ISBN: (纸本)9781665414401

The incentive policies for non-fossil energy are important factors affecting the investment behavior of generation companies (GENCOs). However, the investment behavior of different types of GENCOs in the system could be quite different, so the implementation of the policy must consider how to achieve incentive compatibility with the investment behavior of GENCOs. This article constructs a power transition simulation model that considers the investment behavior of GENCOs. Taking the wind power feed-in tariff policy as an example, it analyzes the impact of policy on the whole system’s low carbon transition pathway of the power structure and the evolution trajectory of system carbon emissions under different behavior scenarios.

关键词： Economics Analytical models Conferences Tariffs Carbon dioxide Companies Wind power generation

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