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International Conference of Electrical, Electronic and Networked Energy Systems, EENES 2024

作者： Xu, Wei Song, Shengli Long, Xuehan Miao, Yiru Tang, Mengyang Chongqing Sub-Bureau of Southwest China Regional Air Traffic Management Bureau CAAC Chongqing401120 China Chongqing Airport Group Company Chongqing400044 China State Key Laboratory of Power Transmission Equipment Technology Chongqing University Chongqing400044 China Key Laboratory of Smart Grid and Intelligent Control in Nanchong Southwest Petroleum University Nanchong637001 China

ISBN: (纸本)9789819620791

In order to reduce the switching loss of the single-phase inverter, improve the efficiency and power density, a discontinuous PWM modulation strategy based on the unified modulation method is proposed for the single-phase full bridge LC inverter. The differential mode modulation signal between a-phase and b-phase is constant, the common mode modulation signal is adjusted and injected into the modulation signals of a-phase and b-phase, the switching devices of a-phase and b-phase are in inactive state alternating, so the switching loss can be reduced. Then, the mathematical model of the single-phase full bridge LC inverter is established, the parameter design method of the single loop proportional resonant controller is studied according to the amplitude-frequency characteristic curve, the output voltage can track the reference signal without error under the disturbances of input voltage and load. Finally, the experiment is carried out, which shows that the switching loss can be reduced by the proposed discontinuous PWM modulation, and high quality and precision voltage output can be obtained by the single loop proportional resonant controller. © Beijing Paike Culture Commu. Co., Ltd. 2025.

关键词： Pulse width modulation

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Lifetime Assessment of SiC Inverter Under Different control Strategies 17th

Lifetime Assessment of SiC Inverter Under Different Control ...

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17th Annual Conference of China Electrotechnical Society, CES 2022

作者： Tang, Mengyang Yang, Xu Shen, Haiyun Peng, Wenshu Key Laboratory of Smart Grid and Intelligent Control of Nanchong Southwest Petroleum University Nanchong637001 China Tianjin Branch of China National Offshore Oil Corporation Ltd. Tianjin300456 China State Grid Yichun Power Supply Company Jiangxi Yichun330077 China

ISBN: (纸本)9789819904501

The electric vehicle inverter is the core component of the electric vehicle and has very high requirements on reliability. Silicon carbide (SiC) devices have the advantages of high temperature resistance, high voltage resistance, and low loss, and have been widely used in automotive inverters. Lifetime assessment is an important means to improve the reliability of electric vehicle inverters. It is of great significance to evaluate the lifetime of SiC devices for automotive inverters. In this paper, the vehicle inverter using SiC device is taken as the research object, and the lifetime of SiC device and its influencing factors under vector control and model prediction control are evaluated and studied respectively. The electrothermal simulation model of the electric drive system of electric vehicles under actual working conditions is constructed in the Matlab and Plecs co-simulation platform. The following two control strategies are compared and analyzed in detail on the influence of junction temperature and lifetime of SiC devices, which provides an analysis basis for the assessment of the control performance and thermal performance of electric vehicle SiC inverters under the selection of motor control strategies. © 2023, Beijing Paike Culture Commu. Co., Ltd.

关键词： Silicon carbide

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Fault diagnosis method for ship power-system DC–DC converter using augmented WPD and multi-branch CNN-BiLSTM network

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Journal of the Franklin Institute 2025年第9期362卷

作者： Ren, Yuanjie Zhang, Lanyong Shi, Peng Peng, Huimin College of Intelligent Systems Science and Engineering Harbin Engineering University Harbin150001 China School of Electrical and Mechanical Engineering The University of Adelaide SA5000 Australia State Key Laboratory of Smart Grid Protection and Control Nari Group Corporation Jiangsu Nanjing211106 China

Direct current (DC) –DC converters are indispensable energy conversion devices in medium-voltage DC power systems of ships. Herein, the fault diagnosis problem of bidirectional DC–DC converters is investigated. Considering that the fault diagnosis of bidirectional DC–DC converters requires the effective combination of information from multiple diagnostic signals and differences in characteristic data in different time scales, a parallel stacking of multiple branches based on enhanced wavelet packet decomposition technology is proposed as a hybrid model of a convolutional neural network and bidirectional long short-term memory network. First, a multi-input method is used to extract effective features in the sequence data. Second, a multi-model fusion processing framework is used to perform fault diagnosis analysis on the DC–DC converter. Finally, the squeeze and excitation attention mechanism is used to weight all types of fault features and adaptively obtain them. The important weights of the classification feature maps learned by different branches generate fault classification results. Experimental results reveal that the proposed method can extract highly discriminative features from raw data and exhibits robustness in noisy environments. © 2025 The Franklin Institute

关键词： Convolutional neural networks

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Design and Optimization of Totem Pole Bridgeless PFC Based on GaN

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

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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

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Voltage control Method for Offshore Floating Photovoltaic Storage Hydrogen Production DC System 25

Voltage Control Method for Offshore Floating Photovoltaic St...

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25th IEEE China Conference on System Simulation Technology and its Application, CCSSTA 2024

作者： Liu, Hongbin Kong, Xiangyu Zhang, Delong Wang, Chunjie Jin, Hui Shao, Yangping Tianjin University of Technology Tianjin Key Laboratory of New Energy Power Conversion Transmission and Intelligent Control Tianjin China Tianjin University Key Laboratory of Smart Grid Tianjin China

ISBN: (纸本)9798350366600

To address the problems of high PV output volatility and unstable DC system voltage control caused by environmental influences on offshore floating photovoltaic hydrogen production systems, this paper proposes a voltage control method based on voltage stabilization for the DC system model of PV storage hydrogen production. Aiming to improve PV power generation quality and enhance system stability, this control method includes maximum power point tracking (MPPT) control for the floating PV system and adaptive coordinated control for the hydrogen storage system. These controls enable the optimal utilization of light resources while ensuring stable bus voltage. Finally, the effectiveness of the control method was verified by simulation. © 2024 IEEE.

关键词： Hydrogen storage

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Optimal layout design for photovoltaic shadow occlusion based on Sketchup and PVsyst 25

Optimal layout design for photovoltaic shadow occlusion base...

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25th IEEE China Conference on System Simulation Technology and its Application, CCSSTA 2024

作者： Yu, Zilong Wang, Chunjie Kong, Xiangyu Yu, Lujie Shao, Yangping Jin, Hui Tianjin University of Technology Tianjin Key Laboratory of New Energy Power Conversion Transmission and Intelligent Control Tianjin China Tianjin University Key Laboratory of Smart Grid Tianjin China

ISBN: (纸本)9798350366600

As photovoltaic (PV) systems gain global popularity, effectively minimizing the impact of shading on PV system performance has become a significant design challenge. This paper introduces a systematic and comprehensive shading analysis method that integrates SketchUp and PVsyst software;by utilizing SketchUp for customized 3D modeling and high-precision shading analysis, this method can effectively identify and address shading issues that are difficult to detect using traditional methods, thereby optimizing module layout and enhancing overall system performance. Subsequently, PVsyst is used to simulate and evaluate system efficiency and losses under different conditions. The aim is to improve the accuracy and efficiency of PV system design and to provide a new approach to optimizing photovoltaic system design by combining 3D modeling with performance simulation. © 2024 IEEE.

关键词： Photovoltaic effects

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Steady-state Voltage Security-constrained Optimal Frequency control for Weak HVDC Sending-end AC Power Systems

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Journal of Modern Power Systems and Clean Energy 2024年第2期12卷 658-669页

作者： Qiangqiang Wang Liangzhong Yao Jian Xu Yuping Zheng Wei Li Wei Wang School of Electrical Engineering and Automation Wuhan UniversityWuhan 430072China Hubei Engineering and Technology Research Center for AC/DC Intelligent Distribution Network(Wuhan University) Wuhan 430072China State Key Laboratory of Smart Grid Protection and Control NARI Group Corporation(State Grid Electric Power Research Institute)Nanjing 211106China

Due to the fact that a high share of renewable energy sources(RESs)are connected to high-voltage direct current(HVDC)sending-end AC power systems,the voltage and frequency regulation capabilities of HVDC sending-end AC power systems have *** has resulted in potential system operating problems such as overvoltage and overfrequency,which occur simultaneously when block faults exist in the HVDC *** this study,a steady-state voltage security-constrained optimal frequency control method for weak HVDC sending-end AC power systems is *** integrated virtual inertia control of RESs is employed for system frequency *** dynamic reactive power compensation devices are utilized to control the voltage of all nodes meet voltage security ***,an optimization model that simultaneously considers the frequency and steady-state voltage security constraints for weak HVDC sending-end AC power systems is *** optimal control scheme with the minimum total cost of generation tripping and additional dynamic reactive power compensation required is obtained through the optimization *** are conducted on a modified IEEE 9-bus test system and practical Qing-Yu line commutated converter based HVDC(LCC-HVDC)sending-end AC power system to verify the effectiveness of the proposed method.

关键词： Renewable energy source(RES) high-voltage direct current(HVDC) AC power system optimal frequency control steady-state voltage security dynamic reactive power compensation

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Optimal Scheduling of Provincial local Coordinated Based on Source-grid-load-storage Interactions 25

Optimal Scheduling of Provincial local Coordinated Based on ...

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25th IEEE China Conference on System Simulation Technology and its Application, CCSSTA 2024

作者： Zhang, Haixuan Kong, Xiangyu Zhang, Delong Liu, Jiancun Zhou, Xuesong Liu, Mao Tianjin University of Technology Tianjin Key Laboratory of New Energy Power Conversion Transmission and Intelligent Control Tianjin China Tianjin University Key Laboratory of Smart Grid Tianjin China

ISBN: (纸本)9798350366600

Considering the characteristics of coordination among source-network-load-storage, a provincial local coordinated scheduling method based on the interaction of sourcenetwork-load-storage is proposed. Firstly, the interaction mechanism of source-grid-load-storage is refined. Secondly, according to the spatial characteristics of the scheduling of provincial local coordinated, a multi-objective optimal scheduling model is established with the objectives of economy and new energy consumption. Thirdly, a genetic algorithm is used to solve the problem. Finally, by analyzing the examples, it is proved that the proposed method can reduce the system cost and improve the utilization rate of new energy. © 2024 IEEE.

关键词： Scheduling algorithms

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The Commonality of Economic Dispatch Models Based on Scenario/Interval 7

The Commonality of Economic Dispatch Models Based on Scenari...

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7th IEEE Conference on Energy Internet and Energy System Integration, EI2 2023

作者： Wang, Yishen Wei, Renjie Sun, Fengbin Zhang, Ruihan Yao, Tiechui Ren, Lan State Grid Smart Grid Research Institute Co Ltd Future Science Park Beijing China State Grid Smart Grid Research Institute Co Ltd Shandong University Key Laboratory of Power System Intelligent Dispatch and Control Ministry of Education Jinan China

ISBN: (纸本)9798350345094

With the increasing penetration of renewable energy, how to maximize the acceptance of renewable energy on the basis of satisfying the economy security and reliability of the power system is an urgent problem to be solved. In this area, mathematical optimization methods such as robust optimization and stochastic optimization are generally used to construct models based on different uncertainty descriptions. Previous studies have shown that robust optimization has high computational efficiency but conservative results, while stochastic optimization has low computational efficiency but accurate results. Therefore, different studies will choose suitable methods based on the characteristics of the models to be constructed. However, existing studies have not thoroughly discussed whether there is a connection between the two methods. This paper first proposes an economic dispatch model based on scenario considering the admissible region of net load, and introduces a new affine strategy to transform this model into a deterministic form. Secondly, based on further exploration of the characteristics of economic dispatch models based on scenario/interval, the paper concludes that the two models are common when they are sufficiently precise. Finally, the correctness of the conclusion is verified on the IEEE-RTS system. © 2023 IEEE.

关键词： Computational efficiency

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Research on Signal Extraction and control Strategy of Single-Phase PWM Rectifier in d-q Coordinate Frame

Research on Signal Extraction and Control Strategy of Single...

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International Conference on Wireless Power Transfer, ICWPT 2022

作者： Gong, Lieqian Fu, Guanggang Wang, Xin Tang, Mengyang Liao, Wu Miao, Yiru State Grid Wenzhou Power Supply Company Limited Wenzhou325000 China College of Electrical and Information Engineering Hunan University Changsha410082 China Key Laboratory of Smart Grid and Intelligent Control in Nanchong Southwest Petroleum University Nanchong637001 China Chengdu Guojia Electriacal Engineering Co. Ltd. Chengdu611756 China

ISBN: (纸本)9789819906307

There are some AC time-varying physical quantities in single-phase PWM rectifier, as a result, it is difficult to design control system. a current inner loop-voltage outer loop control strategy is implemented by establishing the math model in d-q synchronous frame. The grid voltage contains abundant harmonics, which seriously affects the detection accuracy of the voltage phase, and the virtual component of grid-side current cannot be directly sampled, so a discrete extraction method for the fundamental component of the grid voltage without phase-locked loop is proposed. Simulation and experimental results show that under different loads, the output voltage of the rectifier can accurately follow the given, and the dynamic performance is good. The grid-side current and electromotive force maintain unit power factor operation, which proves the virtual current detection method and control strategy proposed in this paper is feasibility and correctness. © 2023, The Author(s), under exclusive license to Springer Nature Singapore Pte Ltd.

关键词： Extraction

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