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IEEE Student Conference on Electric Machines and systems

作者： Chang Liu Lin Xu Wei Wei Yingdong Wei Hua Yang Xueyuan Liu Yi Zhang Ying Wang Electric Power Research Institute of State Grid Sichuan Electric Power Company Chengdu China State Key Laboratory of Control and Simulation of Power System and Generation Equipment Tsinghua University Beijing China School of Electrical Engineering and Automation Fuzhou University Fuzhou China College of Electrical Engineering Sichuan University Chengdu China

ISBN: (数字)9781728156224

ISBN: (纸本)9781728156231

A shunt unified power quality controller (S-UPQC) is developed and has been tested in the field in order to confirm its performance at mitigating voltage sags for sensitive power consumers. The S-UPQC keeps the magnitude of the voltage supply for power consumers constant by acting as a voltage source when voltage sags occur in the power grid. In this paper, a smooth switching strategy is designed to smooth the voltage disturbance of power consumers when the power supply switches between the S-UPQC and the grid. simulation results are presented to show its high performance. A prototype of S-UPQC is developed and a field test has been conducted. During its operation, the performance of the SUPQC at mitigating voltage sags within actual power systems is confirmed.

关键词： simulation power quality Prototypes Switches Production Reliability Switching circuits

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Consensus-based Nodal Pricing Mechanism for Automated Demand Response Considering Congestion Management on Distribution Networks

Consensus-based Nodal Pricing Mechanism for Automated Demand...

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

作者： Gang Luo Yijing Chen Yue Zhao Yujun He Chao Gong Chen Zhao Power Dispatching and Control Center Guangdong Power Grid Co. Ltd Guangzhou China Electric Power Research Institute China Southern Power Grid Co. Ltd Guangzhou China State Key Lab of Control and Simulation of Power Systems and Generation Equipments Tsinghua University Beijing China

ISBN: (数字)9781728143033

ISBN: (纸本)9781728143040

This paper investigates a consensus-based nodal pricing mechanism for incenting automated demand response in the deregulated market environment. These small-scale customers are autonomously managed by automated demand response (DR) controllers, which are capable of scheduling user's load devices to follow a day-ahead 24h price signal from electricity distribution companies (EDC). First, an alternating current optimal power flow (ACOPF) on the distribution network is formulated considering the participation of automated DR. Then, a consensusbased approach is exploited to adjust the nodal price and DR profile for each customer using primal-dual decomposition. The proposed mechanism is compared with a day-ahead pricing (DAP) program on a test distribution network and numerical results have shown promising performance in supporting the congestion management on the distribution grid.

关键词： Pricing Load management Load modeling power grids Mathematical model Dispatching Companies

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Planning of active power distribution network based on source-network-load collaborative optimization

Planning of active power distribution network based on sourc...

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

作者： Z. Jiang Q. Yu A. Li Y. Xiong G. Long Y. Liu Ministry of Education (Northeast Electric Power University) Key Laboratory of Modern Power System Simulation and Control & Renewable Energy Technology Jilin 132012 China Tsinghua University State Key Laboratory of Power Systems Department of Electrical Engineering Beijing China

With the fast development of renewable energy generation, the randomness and volatility seriously threaten the stability of the power system. In order to improve the consumption rate of renewable energy and the economic benefit, the source-network-load collaborative optimization is put forward and widely used in the power system. And the active power distribution network which consists of the energy storage devices and flexible load is the best carrier to realize it. Based on the active power distribution network planning, this paper firstly designs an economic index covering construction cost and operation cost as the optimization objective. Then with the physical constraints consisting of the physical features of generation units, energy storage devices and flexible load, the source-network-load collaborative optimization model of active power distribution network is established. Finally, a case of city distribution network is presented to verify the effect of source-network-load collaborative optimization and the efficiency of the optimization model.

关键词： power distribution planning power distribution reliability distributed power generation power distribution economics renewable energy sources optimisation energy storage

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Retraction notice to “Multi-objective planning of microgrid based on renewable energy sources and energy storage system” [J. Energy Storage 68 (2023) 107803]

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Journal of Energy Storage 2025年 117卷

作者： Hao Tian Keqing Wang Xiufeng Cui Zexi Chen Ergang Zhao Sara Saeedi School of Automation Wuxi University Wuxi 214105 China State Key Lab of Control and Simulation of Power Systems and Generation Equipments Dept. of Electrical Engineering Tsinghua University Haidian District Beijing 100086 China Beijing Sifang Engineering Co. Ltd Beijing 100085 China State Grid Beijing Urban Power Supply Company Beijing 100034 China Electrical Engineering Department Sun-Life Company Baku Azerbaijan

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Comprehensive comparison and analysis of non-inverting buck boost and conventional buck boost converters

Comprehensive comparison and analysis of non-inverting buck ...

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作者： Weng, Xing Xiao, Xiang He, Weibin Zhou, Yongyan Shen, Yu Zhao, Wei Zhao, Zhengming State Key Lab of Control and Simulation Power Systems and Generation Equipment Department of Electrical Engineering Tsinghua University Beijing100084 China Guangdong Electric Power Research Institute Guangdong510080 China Dongguan Power Supply Bureau Guangdong Power Grid Company Dongguan523000 China

The non-inverting buck boost (NIBB) converter has attracted significant attention in recent years, as it shares ground between input and output, and the voltage stress of switches is lower. In order to investigate the differences between NIBB and conventional buck boost converters, a comprehensive comparison and analysis of these two converters were conducted in terms of their operation principles, which includes multi-mode control strategy and dual-edge modulation here, and also the characteristics of switches and passive components in the two converters were analysed. The results show that NIBB is better than conventional buck boost circuit in these aspects of electrical stress, power loss, cost, passive component volume, and so on. Two prototypes for the two converters with 10 kW/20 kHz were designed and simulated, respectively, for verifying the results. Analytical and simulated results confirmed the conclusions. © 2019 Institution of Engineering and *** right reserved.

关键词： Buck-Boost converter

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Online detection method for internal fault of permanent magnet synchronous generator based on new type of search coil

Online detection method for internal fault of permanent magn...

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International Conference on Electrical Machines and systems (ICEMS)

作者： Daizong Tian Yuguang Sun Wei Du Lin Gui State Key Laboratory of Control and Simulation of Power System and Generation Equipment Tsinghua University Beijing People's Republic of China

ISBN: (纸本)9781728133997

In order to overcome the limitations of traditional fault diagnosis methods, this paper studies the online detection method of internal faults for permanent magnet synchronous generators (PMSG) based on the new type of search coil. Taking a 6-phase PMSG as an example, two types of search coil are fixed in the air gap according to the pole-pair number and the armature winding structure. A calculation method for the induced EMF of the new type of search coil in the PMSG is presented, which is verified by the model machine experiment. simulation and experiments on the 6-phase PMSG show that the open-circuit voltage of the search coil was zero under normal operation, while an obvious EMF was induced in the search coil once the internal asymmetry fault occurred. And according to the period of the voltage, the fault could be distinguished between the internal fault of the stator winding and the demagnetization fault. Based on the new type of search coil, this paper provides a new way for online monitoring of internal faults of PMSGs.

关键词： Circuit faults Stator windings Harmonic analysis Magnetic fields Windings Generators Demagnetization

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Thermal Analysis of Internal Short-Circuit Faults in Stator Windings of Multiphase Permanent Magnet Synchronous Generator with Rectifier-load System

Thermal Analysis of Internal Short-Circuit Faults in Stator ...

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International Conference on Electrical Machines and systems (ICEMS)

作者： Daizong Tian Yuguang Sun Wei Du Lin Gui State Key Laboratory of Control and Simulation of Power System and Generation Equipment Tsinghua University Beijing People's Republic of China

The multiphase permanent magnet synchronous generator (PMSG) with rectifier-load systems have been widely used in the mobile platforms that requires high power supply system security. Taking a 6-phase rectifier PMSG as an example, a multi-loop combined with FEM mathematical model is established to analyze the internal short-circuit of stator windings, and a series of fault experiments are carried out on a 6-phase model machine. Using the mathematical model, all the voltages and currents of stator windings are calculated out in both normal operation and various internal short-circuit faults. The simulation results are consistent with the experiment data, which verifies the correctness of the mathematical model. In addition, the simulation currents of the windings could be substituted into the 2D-FEM temperature field calculation model, then the internal temperature field distribution of the model machine under various metallic inter-turn and phase-to-phase short-circuit faults are obtained. The variation analysis of the internal temperature field corresponding to different internal faults provides a basis for the internal fault detection.

关键词： Mathematical model Stator windings Rectifiers Windings Generators Resistance Permanent magnets

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Research on reliability of Ad hoc network communication in UAVs formations 6

Research on reliability of Ad hoc network communication in U...

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6th IEEE International Symposium on Electromagnetic Compatibility, ISEMC 2019

作者： Li, Yanchu Li, Shufang Ding, Qingqing Wang, Chao School of Information and Communication Engineering Beijing University of Posts and Telecommunications Beijing China State Key Lab of Control and Simulation of Power Systems and Generation Equipments Tsinghua University Dept. of Electrical Engineering Beijing China

ISBN: (纸本)9781728144160

As an important performance index of the UAV Ad hoc network, network reliability is a great significance for the performance evaluation of the UAV network system, and provides a direction for the selection of the UAVs formations. In this paper, based on the 3D Gauss Markov moving model, we modeled the motion mode of the UAV group. By using the Weibull distribution to sample the failure of the fleet, and through the correlation matrix which characterizes the connectivity state of network nodes in the time domain, we studied and compare the reliability of the self-organizing network of the UAV group with different formations. It provides a basis for selecting the formations of the UAVs for different network requirements. © 2019 IEEE.

关键词： Reliability

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A control Strategy of the Grid Support for Photovoltaic Inverter Based on control-hardware-in-the-loop simulation 8

A Control Strategy of the Grid Support for Photovoltaic Inve...

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8th IEEE International Conference on Advanced power System Automation and Protection, APAP 2019

作者： Li, Shuang Si, Gangquan Qu, Kai Yang, Zeyu He, Guoqing Xi'an Jiaotong University State Key Laboratory of Electrical Insulation and Power Equipment School of Electrical Engineering Xi'an China State Key Laboratory of Operation and Control of Renewable Energy and Storage Systems China Electric Power Research Institute Beijing China

ISBN: (纸本)9781728117225

With the increasing proportion of renewable energy generation, the grid lost strong electrical support for renewable energy generating units, which leads to a series of new grid- connected stability problems. Therefore, it is of great significance to enhance the acceptance of PV power generation by improving the grid-connected voltage quality of PV inverters. A coordinated control strategy for PV inverters with the grid support capability was proposed in this paper, which fully utilized the voltage and frequency regulation capability of grid- connected inverters. At the same time, a real-time simulation system of PV grid-connected inverter based on FPGA simulator and eHS modeling technology was built by RT-LAB simulation platform. Finally, some relevant experiments are carried out on the simulation platform when the grid-connected voltage is disturbed. And the simulation results verified the validity of the proposed control strategy. © 2019 IEEE.

关键词： simulation platform

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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...

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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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