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检索条件"机构=State Key Laboratory of Control and Simulation of Power System and GenerationEquipments"

共 617 条记录，以下是361-370 订阅

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Optimal Capacity Allocation of Integrated Agricultural Energy Network with Enhanced Geothermal system Considering Seasonal Differences

Optimal Capacity Allocation of Integrated Agricultural Energ...

引用

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

作者： Yang Si Laijun Chen Xuelin Zhang Xiaotao Chen Handing Dan Shengwei Mei Qinghai Key Lab of Efficient Utilization of Clean Energy(Tus-Institute for Renewable Energy) Qinghai University Xining China Qinghai Xining Power Generation Branch of Huanghe Hydropower Xining China State Key Laboratory of Control and Simulation of Power System and Power Tsinghua University Beijing China

ISBN: (数字)9781728196060

ISBN: (纸本)9781728196077

As an essential direction of agricultural development in the future, the energy demand for facility agriculture varies significantly in different seasons. In this paper, an integrated energy network structure for independent facility agriculture with combined heat and power enhanced geothermal system (CHP-EGS) is proposed. Based on the CHPEGS cogeneration model and stochastic optimization method, the optimal analysis model for capacity allocation of independent facility agricultural integrated energy network is established. Taking the energy supply of facility agriculture in the hot dry rock resource-rich area of the Gonghe basin in China as an example, the optimal allocation scheme and operation characteristics of integrated energy networks for facility agriculture are analyzed considering the difference of seasonal energy consumption. The results show that, under the same capacity configuration, facility agriculture has sufficient energy support in summer, and its income can be increased by expanding the area of greenhouse or developing product processing. In winter, if the basic energy supply-demand of facility agriculture is to be ensured, the emergency heating system should be configured according to about 30% of the maximum heating demand. The optimization model and case analysis can provide meaningful guidance for seasonal energy sources planning of facility agriculture.

关键词： Analytical models Cogeneration Stochastic processes Agriculture Resource management Thermal energy Energy storage

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Research on buffer circuit suitable for solid state DC circuit breaker

Research on buffer circuit suitable for solid state DC circu...

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The 16th IET International Conference on AC and DC power Transmission (ACDC 2020)

作者： W. Xie F. Xiao B. Liu R. Zeng W. Li L. Qu Z. Song Shandong Taikai High-Voltage Switchgear Co. Ltd. Tai’an China Tsinghua University State Key Laboratory of Control and Simulation of Power System and Generation Equipment (Department of Electrical Engineering Beijing China

Buffer circuit is one of the important parts to ensure the safe and reliable fault current breaking of the solid-state DC circuit breaker. Therefore, this paper conducts a research on the buffer circuit suitable for solid-state DC circuit breaker. Firstly, a low-loss solid state DC circuit breaker topology is proposed to meet the fault protection requirements of DC distribution network. Then, the circuit model of the breaking process of solid-state DC circuit breaker is established, and the calculation expression of transient current is deduced. Furthermore, the influence of the buffer circuit parameters on the current breaking characteristic of the solid-state DC circuit breaker is analysed. Finally, the feasibility of the design parameters of buffer circuit is verified by experiments, which lays the foundation for the development of solid-state DC circuit breaker.

关键词： circuit breakers fault currents DC distribution systems buffer circuits power distribution reliability

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power Output Monitoring and Anomaly Identification of Photovoltaic systems Using Graphical Modeling

Power Output Monitoring and Anomaly Identification of Photov...

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International Conference on Sensing, Diagnostics, Prognostics, and control (SDPC)

作者： Yonghua Chen Xiaochen Zhang Gang Liu Rui Wu Chao Liu Dongxiang Jiang NARI Technology Co. Ltd. NARI Group Corporation (State Grid Electric Power Research Institute) Nanjing China Tsinghua University Beijing China State Key Laboratory of Control and Simulation of Power System and Generation Equipment Tsinghua University Beijing China

ISBN: (数字)9781728170503

ISBN: (纸本)9781728170510

Photovoltaic cells are being increasingly installed worldwide as a type of important renewable resource for power generation. Among the installed photovoltaic systems, data are collected from the control and monitoring system, and the anomaly detection researches are mostly based on the individual photovoltaic cells and the systematic behavior in a group of photovoltaic systems is not well studied. Based on the assumption that the photovoltaic cells installed in the same location are with very close solar radiation, the power output of each subsystem is considered in this work for monitoring the operating status of the subsystem and identifying the anomalous subsystem, where spatiotemporal pattern network, a probabilistic graphical modeling approach, is applied. The results show that the presented framework is able to detect the anomaly and locate the anomalous subsystem.

关键词： Photovoltaic systems Fault diagnosis Photovoltaic cells Data models Spatiotemporal phenomena Monitoring Anomaly detection

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Review on Pumped Storage power Station in High Proportion Renewable Energy power system

Review on Pumped Storage Power Station in High Proportion Re...

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IEEE Student Conference on Electric Machines and systems

作者： Bingxin Sun Shuping Tian Jiang He Liande Liu Zhiqiang Wang Jiawei Guo Fei Xu Te Cheng Junhui Li Inner Mongolia Hohhot Pumped-Storage Power Generation Co LTD Hohhot China State Key Lab of Power Systems Tsinghua University Beijing China Key Laboratory of Modern Power System Simulation and Control & Renewable Energy Technology Ministry of Education (Northeast Electric Powe University) Jilin China

ISBN: (数字)9781728156224

ISBN: (纸本)9781728156231

Large scale renewable energy, represented by wind power and photovoltaic power, has brought many problems for the safe and stable operation of power system. Firstly, this paper analyzes the main problems brought by large-scale wind power and photovoltaic power integration into the power system. Secondly, the paper introduces the basic principle and engineering construction of pumped storage power station. Thirdly, the paper expounds in detail the current application of pumped storage power station in power system, and finally points out the main problems faced by the development of Pumped Storage power Station and the development trend, so as to provide reference for the construction and operation of pumped storage power station.

关键词： Photovoltaic systems Renewable energy sources Conferences Pumps Wind power generation Market research power systems

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Analysis of fatigue life loss of drivetrain of doubly-fed wind turbines under short-circuit fault of power grid 8

Analysis of fatigue life loss of drivetrain of doubly-fed wi...

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8th Renewable power Generation Conference, RPG 2019

作者： Shilong, Qiu Hui, Li Lijiao, Gong Bin, Wang Zhaoseng, Chai You, Wu Department of Mechanical and Electrical Engineering Shihezi University Shihezi China State Key Laboratory of Power Drivetrain Equipment and System Security Chongqing University Chongqing China State Key Lab of Control and Simulation of Power Systems and Generation Equipments Department of Electrical Engineering Tsinghua University Haidian District Beijing China

ISBN: (纸本)9781839531255

The shafting drivetrain of the doubly fed wind turbine is the part with the highest failure rate. The electromagnetic torque fluctuation caused by the grid fault easily results in the torsional vibration fatigue loss of the shaft. Accordingly, the influences of drivetrain fatigue life loss under different grid faults require investigation. Firstly, the four-mass model of the drivetrain is constructed on the basis of MATLAB/Simuhnk. Secondly, the electromagnetic torque response under short-circuit fault of the grid is obtained via model simulation. Finally, the effects of different types of grid faults on the fatigue life of the drivetrain are analysed through Mlife. Results show that the electromagnetic torque fluctuation load generated by grid fault has no apparent influence on the fatigue life of the drivetrain in the short term. but the cumulative effect of short-term damage will aggravate the fatigue life loss of the drivetrain and increase the failure risk of the component. The electromagnetic torque generated by the three-phase symmetrical short-circuit is the most violent and has the maximum effect on the fatigue life of the drivetrain. © 2019 Institution of Engineering and Technology. All rights reserved.

关键词： Timing circuits

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Multi-objective optimal dispatch method based on source-network-load-storage interaction system for DC distribution network 8

Multi-objective optimal dispatch method based on source-netw...

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8th Renewable power Generation Conference, RPG 2019

作者： Quan, Ran Li, Guoqing Jin, Guobin Liu, Zhao Chen, Qing Key Laboratory of Modern Power System Simulation and Control and Renewable Energy Technology Ministry of Education Northeast Electric Power University Jilin China State Grid Jiangsu Electric Power Co. Ltd. Nanjing China Jiangsu Electric Power Company Research Institute Nanjing China

ISBN: (纸本)9781839531255

The DC distribution network can integrate the photovoltaic power generation system with high efficiency, but the random fluctuation of the photovoltaic output power is strong and there is a problem of PV consumption, which has a certain degree of impact on the economic optimization operation of the system. Therefore, the source-network-load-storage optimization interaction concept is introduced in the DC distribution network. Based on the in-depth analysis of the interactive load characteristics, the interaction load and energy storage technology can be fully utilized to the system to consumpt the photovoltaic. Combined with the features of DC distribution network structure, comprehensively consider the impact of the interactive load and energy storage system collaborative optimization on the system operating cost and power flow distribution, so that both the power generation side and the power side can participate in the resource optimization configuration of the grid operation. A multi-objective optimal scheduling model for photovoltaic DC distribution networks with operational cost, network loss and voltage deviation is established. The simulation example shows that: Collaborative optimization using interactive load and energy storage system can greatly reduce system operating cost, network loss and voltage deviation, effectively improve the level of PV consumption, and realize safe and reliable operation of DC distribution network. © 2019 Institution of Engineering and Technology. All rights reserved.

关键词： Energy storage

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Research on Lithium-ion Battery Safety Risk Assessment Based on Measured Information

Research on Lithium-ion Battery Safety Risk Assessment Based...

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Sustainable power and Energy Conference (iSPEC)

作者： Xuyan Zhou Lin Cheng Yuxiang Wan Ning Qi Liting Tian Feng You State Key Laboratory of Control and Simulation of Power Systems and Generation Equipments Tsinghua University Beijing China Energy Storage System Business Unite Tianjin Lishen Battery Joint-Stock Co. Ltd. Tianjin China

ISBN: (数字)9781728191645

ISBN: (纸本)9781728191652

Lithium-ion batteries have the advantages of high energy density, fast power response, recyclability, and convenient to movement, which are unsurpassed by other energy storage systems. However, safety issues such as thermal runaway of lithium-ion batteries have become the main bottlenecks restricting the development of their extensive applications. In practical applications, the demand for battery energy storage scale and specific energy continues to increase, and the contradiction between battery high safety and battery safety has become increasingly prominent. This paper proposes a lithium-ion battery safety risk assessment method based on online information. Effective predictions are essiential to avoid irreversible damage to the battery and ensure the safe operation of the battery energy storage system before a failure occurs. This paper is expected to provide novel risk assessment method and research idea for the development and design of high-safety battery systems.

关键词： Lithium-ion batteries Temperature measurement Voltage measurement Thermal management Battery charge measurement Safety Risk management

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An Adaptive Restart Method for DC Transmission Line in LCC-HVDC system

An Adaptive Restart Method for DC Transmission Line in LCC-H...

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

作者： Jing CAI Xinzhou DONG State Key Laboratory of Control and Simulation of Power System and Generation Equipment Tsinghua University Beijing China

ISBN: (数字)9781728117225

ISBN: (纸本)9781728117232

DC-line fault recovery sequence (DFRS) is widely implemented in LCC-HVDC system to realize fast recovery in case of temporary fault. When permanent fault occurs, restart still happens several times as preset, resulting in repeated impacts and reducing the stability and reliability of the system. An adaptive restart for DC line fault is studied in this paper to deal with this problem. Firstly, the converter valves states and DC voltage characteristics under temporary fault and permanent fault are analyzed respectively. Then, a method based on DC voltage control is proposed to distinguish different fault states. Current DFRS strategy is improved by adding this process, through which the fault pole will only restart after the temporary fault disappearing, while directly blocked when a permanent fault is recognized. Fault handling time can be shortened and negative effects of DC line fault are minimized. The simulation results verify feasibility and effectiveness of proposed method.

关键词： Firing HVDC transmission Inverters Voltage control Valves Rectifiers Thyristors

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A Novel Digital Active Gate Driver For High-power IGBT To Reduce Switching Losses And Stresses

A Novel Digital Active Gate Driver For High-Power IGBT To Re...

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IEEE Energy Conversion Congress and Exposition

作者： Yatao Ling Zhengming Zhao Yicheng Zhu State key Laboratory of Control and Simulation of Power System and Generation Equipment Tsinghua University Beijing China

This paper proposes a novel digital active gate drive method, aiming to optimize high-power IGBT's switching losses and stresses. Compared to common voltage-source gate driver, the proposed method can reduce switching losses while being able to suppress IGBT current and voltage overshoots during switching transients. The proposed method is described in detail and is experimentally verified under various operating points. Additionally, since parasitic inductances in the commutation and gate loop are critical to gate driver's stability analysis and online calculations of collector current and current slope, an extraction principle is proposed and verified by experiments.

关键词： Insulated gate bipolar transistors Logic gates Switches Field programmable gate arrays Delays Switching loss

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Discrete state Event-Driven Approach for High-power Converter simulations

Discrete State Event-Driven Approach for High-Power Converte...

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IEEE Energy Conversion Congress and Exposition

作者： Bochen Shi Zhengming Zhao Yicheng Zhu Zhujun Yu Jiahe Ju Liqiang Yuan Kainan Chen State Key Laboratory of Control and Simulation of Power System and Generation Equipment Tsinghua University Beijing China

Demands for high-power converters are increasing rapidly. Nevertheless, due to their complex structures and multi-time-scale features, accurate and efficient simulation of such systems has long been a huge obstacle. Aiming at improving the unacceptably slow simulation speed of high-power converters, this paper improves Discrete state Event-Driven (DSED) approach by implementing a decoupling method. Taking a 10kV 1MW electric energy router as an example, this paper evaluates the effectiveness of DSED with the proposed decoupling method in high-power applications. In the studied case, compared with commercially available tool for power electronics simulation, PLECS, DSED can achieve an up to 1000-fold improvement in simulation speed under the same accuracy: PLECS takes 6 hours while DSED only takes 18 seconds. DSED provides a powerful simulation tool for analysis, design and control of high-power converters.

关键词： event-driven simulation numerical algorithm circuit partitioning high-power converter electric energy router solid-state transformer

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