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

作者： Chen, Tao Ma, Wuhan Xu, Mingyang Guo, Ziqing Yao, Yuhao Zeng, Xiangtao Gao, Congzhe Marine Design and Research Institute of China China State Shipbuilding Corporation Limited Shanghai China Key Laboratory of Control of Power Transmission and Conversion Ministry of Education Shanghai Jiao Tong University Shanghai China

ISBN: (纸本)9789819620456

The AC/DC hybrid ship power system has the problems of small line impedance and similar fault currents in adjacent sections. Hence, the protection method based on the principle of time and current is difficult to ensure the protection selectivity. This paper proposes a hierarchical collaborative protection method based on the principle of layer-by-layer verification, which uses the evaluation system of system electrical kinds, fault hazard, protection particularity, insurance priority and special load requirements to determine the protection stratification and the protection configuration of each layer. Based on the layer-by-layer verification and modification, the selectivity of the global protection of the integrated power system is realized. Finally, the feasibility of the proposed hierarchical collaborative protection method is verified by SIMULINK simulation. © Beijing Paike Culture Commu. Co., Ltd. 2025.

关键词： Hybrid power

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Simulition Study on Fatigue Life of Offshore Floating Photovoltaic DC Cable Across Floating Blocks

Simulition Study on Fatigue Life of Offshore Floating Photov...

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

作者： Du, Xuehui Wang, Chunjie Chen, Peng Fu, Qiang School of Electrical Engineering and Automation Tianjin University of Technology Tianjin300384 China Tianjin Key Laboratory of New Energy Power Conversion Transmission and Intelligent Control Tianjin University of Technology Tianjin300384 China

ISBN: (纸本)9789819618675

In order to solve the fatigue problem of offshore floating photovoltaic direct current(DC) cable between floating blocks under the influence of wave motion, this paper proposes a method to evaluate the fatigue life of DC cable. On the basis of analyzing the fatigue damage mechanism of the DC cable, usingthe service life of the DC cable is accurately predicted by using the stress prediction method with the COMSOL finite element simulation software. By simulating stress conditions under different working conditions, the results show that: The fatigue life of DC cable across floating blocks is negatively correlated with the maximum equivalent stress, and the life decreases with the increase of displacement degree. The dangerous point of cable fatigue is near the fixed point at both ends of the cable. At the same time, the influence of different suspension lengths on the cable fatigue life is analyzed by simulation. The simulation results provide a useful design reference for optimizing cable layout and improving its service life. © Beijing Paike Culture Commu. Co., Ltd. 2025.

关键词： Fatigue damage

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Simulation Device of Subway Short-Circuit Current Based on Luenberger Observer 11th

Simulation Device of Subway Short-Circuit Current Based on L...

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11th Frontier Academic Forum of Electrical Engineering, FAFEE 2024

作者： Zou, Jiajin Chen, Peng Wang, Chunjie School of Electrical Engineering and Automation Tianjin University of Technology Tianjin300382 China Tianjin Key Laboratory of New Energy Power Conversion Transmission and Intelligent Control Tianjin University of Technology Tianjin300382 China

ISBN: (纸本)9789819788194

With the rapid development of urban subway system in recent years, the failure of subway traction network has become a research hotspot. In order to ensure the reliability of the subway power supply, better study the fault characteristics, provide close to the real subway short circuit current, study the action characteristics of the subway high voltage DC circuit breaker under the fault current, design a simulation device based on phase shift full bridge that can generate the subway short circuit current, by controlling the amplitude, frequency, initial phase angle of the input waveform, so that the corresponding waveform can be generated. And it is verified by experiments. The experimental results show that the output has the characteristics of good dynamic response and small error. Considering that the sensor is affected by the interference noise such as the environment, the Luenberger observer is added to optimize the device control algorithm reasonably. © Beijing Paike Culture Commu. Co., Ltd. 2025.

关键词： Short circuit currents

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Optimization of Grounding Resistance Value of Integrated power System of Ship

Optimization of Grounding Resistance Value of Integrated Pow...

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

作者： Chen, Tao Ma, Wuhan Xu, Yangming Zhang, Qisheng Ye, Fan Gao, Congzhe Yu, Moduo Marine Design and Research Institute of China China State Shipbuilding Corporation Limited Shanghai China Key Laboratory of Control of Power Transmission and Conversion Ministry of Education Shanghai Jiao Tong University Shanghai China

ISBN: (纸本)9789819620456

The ship's medium-voltage DC integrated power system represents the future direction of maritime power systems and is a crucial foundation for implementing maritime power strategies. This study focuses on optimizing the grounding resistance values within these systems. It establishes a comprehensive optimization model that considers both the sensitivity and safety of grounding protection. key parameters include fault-to-ground current and grounding resistance overcurrent limits. The optimization aims to reduce the operational costs associated with grounding resistors while ensuring optimal resistance values. Combined with specific parameters, a modeling analysis of the ship's integrated power system in which a ground fault actually occurred was carried out. When a ground fault occurred, the constraints considered were as follows: (1) Ground current constraints at the fault point;(2) Ensure that the characteristic electrical quantity is significant Sensitivity constraints;(3) Ground resistance fault overcurrent constraints to ensure the safety of personnel and equipment. According to the constraint conditions, after determining the resistance optimization range, the optimization function is evaluated piecewise, and then the optimal grounding resistance value is selected. © Beijing Paike Culture Commu. Co., Ltd. 2025.

关键词： grounding protection Medium voltage DC integrated power system for ships overcurrent constraint resistance optimization model

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The Influence of Bond Wire Aging on DM EMI Noise in IGBT Converters Considering High-Frequency Ringing

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IEEE Transactions on Device and Materials Reliability 2025年

作者： Gao, Sai Wang, Shaoxiang Yang, Jianxiong Du, Mingxing Tianjin University of Technology Tianjin Key Laboratory of New Energy Power Conversion Transmission and Intelligent Control Tianjin China

This paper investigates the impact of bond wire aging on differential mode (DM) electromagnetic interference (EMI) noise emissions in IGBTs under the influence of high-frequency ringing. Using a DC-DC buck converter composed of an IGBT half-bridge module as an example, the study analyzes the changes in the EMI spectrum caused by bond wire lift-off in both the time and frequency domains. The paper explains the generation mechanism of high-frequency oscillations induced by the interaction between the stray inductance of the DC link and the freewheeling diode. The study reveals that bond wire lift-off alters DM EMI noise emissions by affecting the switching characteristics of the IGBT. Additionally, an increase in the number of lift-off bond wires during ringing significantly enhances DM EMI noise emissions at and above the resonance frequency. The findings of this study provide a new perspective on the aging effects of power electronic devices and their impact on EMI. © 2001-2011 IEEE.

关键词： Insulated gate bipolar transistors (IGBT)

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Post-fault Restoration Scheme for Multiport Transformer-Less Unified power Flow controller

Post-fault Restoration Scheme for Multiport Transformer-Less...

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

作者： Shen, Jingjing Li, Yinong Qiu, Cheng Wang, Jun Zhou, Jianqiao Zhang, Jianwen Shi, Gang Economic and Technological Research Institute State Grid Shanghai Municipal Electric Power Company Shanghai China Key Laboratory of Control of Power Transmission and Conversion Shanghai Jiao Tong University 800 Dongchuan RD. Minhang District Shanghai China

ISBN: (纸本)9789819620418

The unified power flow controller (UPFC) controls all electrical parameters affecting power transmission, enhancing grid flexibility. It conserves transmission corridors and provides flexible power flow control, dynamic compensation, and stability improvements. A conventional UPFC comprises two back-to-back voltage-source power electronic converters and several transformers. The bulky transformers significantly increase the device’s size and maintenance costs, thereby limiting its widespread application. To compensate the limitations, a multiport transformer-less unified power flow controller (MTUPFC) topology was proposed, offering multiple benefits such as low cost, lightweight, rapid dynamic response, and easy port expansion. However, when a line short-circuit occurs, the remaining healthy lines can easily be affected by the fault current, posing a threat to the safety of both the MTUPFC device and the lines. In this paper, we present a restoration scheme for MTUPFC-equipped grid systems after a failure occurs. Through this scheme, the faulty line is reliably isolated, while the healthy lines continue to operate. The configuration and implementation of this scheme are discussed. The proposed scheme is proven to be effective based on simulation results. © Beijing Paike Culture Commu. Co., Ltd. 2025.

关键词： Restoration

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Impedance Modeling of Communication-Network-Embedded DC Microgrid

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IEEE Transactions on power Systems 2025年第3期40卷 2272-2285页

作者： Zhang, Boshen Gao, Fei Li, Yitong Zheng, Qipeng Khan, Muhammad Mansoor Gu, Yunjie Liu, Dong Ministry of Education Shanghai Jiao Tong University Key Laboratory of Control of Power Transmission and Conversion Shanghai200240 China Shanghai Jiao Tong University Department of Electrical Engineering Shanghai200240 China School of Electrical Engineering Xi'an Jiaotong University State Key Laboratory of Electrical Insulation and Power Equipment Xi'an710049 China Imperial College Department of Electrical and Electronic Engineering LondonSW7 2AZ United Kingdom

Impedance model plays an important role in stability analysis of DC microgrids (MGs) with intuitiveness and effectiveness, especially when the state-space models with detailed system parameters are unavailable. Generally, impedance model can be evaluated at a particular port by system partitioning. However, in hierarchically-controlled DC MGs where distributed generators (DGs) are connected with communication links, it is difficult to split the DC MG into subsystems and derive the port impedance models. In this respect, a communication-network-embedded impedance model is proposed for DC MGs that contain distributed communication networks. Compared to state-of-the-art impedance models, the proposed method retains both local controller and distributed communication dynamics with a non-diagonal apparatus impedance matrix. Based on the proposed communication-network-embedded impedance model, the impedance participation analysis is extended to a distributed system with communication links. The theoretical analysis has been illustrated with a DC-powered trolleybus system as a modified 9-bus communication-network-embedded DC MG, an MMC-based multi-terminal DC grid, as well as a larger 20-bus hybrid AC/DC microgrid. Numerical calculations and time-domain simulations are performed to validate the theoretical analysis. © 1969-2012 IEEE.

关键词： Impedance power system stability Mathematical models Load modeling Stability criteria Analytical models Communication networks

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A Pricing Method of power Regulation Service for Flexiblility Demand 11th

A Pricing Method of Power Regulation Service for Flexiblilit...

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11th Frontier Academic Forum of Electrical Engineering, FAFEE 2024

作者： Jifeng, Cheng Jian, Ping Xiaoyuan, Xu Zheng, Yan State Grid Liaoning Electric Power Research Institute Shenyang110006 China Key Laboratory of Power Transmission and Conversion of Ministry of Education Shanghai Jiao Tong University Minhang District Shanghai200240 China

ISBN: (纸本)9789819787791

Flexibility demand of power systems with high proportion wind power are increasing, which relys on power regulation services. At present, regulating resources provide regulation electricity and selecting option, but they only get the return of the former. The enthusiasm of demand-side resources are restrained, which is the key problem for the expansion of regulating scope. This paper clarifies the value of regulation electricity and option, and discusses the physical significance and economic value of the later. Then, the mathematical model of option pricing problem is derived, and the pricing method of electricity regulation service related to electricity value and option value is given. Finally, it is proved by an example of peak regulation auxiliary service market that the proposed pricing method can improve the incentive effect, stimulate the demand side resources to participate in the flexible regulation service, and improve the ability to cope with the high flexibility scenario. © Beijing Paike Culture Commu. Co., Ltd. 2025.

关键词： demand side resources peak regulation auxiliary service power system flexibility pricing mechanism

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A Trustworthy Cloud-Edge Collaboration Framework for Scheduling Distributed Energy Resources in Distribution Networks

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IEEE Transactions on Smart Grid 2025年第3期16卷 2691-2694页

作者： Jia, Qiangang Jiao, Wenshu Chen, Sijie Yan, Zheng Sun, Haitao Zhengzhou University School of Electrical and Information Engineering Zhengzhou 450001 China Shandong University School of Electrical Engineering Jinan 250100 China Ministry of Education Shanghai Jiao Tong University Key Laboratory of Control of Power Transmission and Conversion Shanghai 200240 China Taiyuan University of Technology College of Electrical and Power Engineering Shanxi Taiyuan 030024 China Ministry of Education Key Laboratory of Cleaner Intelligent Control on Coal & Electricity Shanxi 030024 China

Integration of distributed energy resources, such as photovoltaics, has expanded rapidly within power distribution networks in recent years. Existing management architectures face great challenges in balancing data security and communication efficiency. To address this issue, the paper proposes a cloud-edge collaborative framework that caters to managing multiple distributed energy resources. Firstly, a two-stage structural design method is introduced to determine the optimal configuration of edge nodes for variable reduction. Secondly, a credit-based data interaction scheme considering inherent uncertainty of distributed energy resources is proposed to ensure trustworthy cloud-edge collaborative optimizations. The above work is expected to facilitate the in-depth application of cloud-edge collaboration in the energy scheduling field. © 2010-2012 IEEE.

关键词： Cloud-edge collaboration credit value distributed energy resources

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Finite-Time Convergence Sliding Mode control Strategy for an LLCL Filter–Based Battery Energy Storage power conversion System

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International Journal of Circuit Theory and Applications 2025年第0期

作者： Gao, Ning Li, Chao Wu, Weimin Zhu, Lixun Li, Rui Department of Electrical Engineering Shanghai Maritime University Shanghai China Key Laboratory of Control of Power Transmission and Conversion Shanghai Jiao Tong University Shanghai China

A modified finite-time convergence sliding mode control method is presented in this paper for the power conversion system integrated with LLCL filter applied in battery energy storage system. The presented control strategy mainly possesses several merits including restricted convergence time to the equilibrium and strong robustness to uncertainties of filter parameters. The state error model for LLCL filter is established first as a preliminary step to sliding mode control design. Then, sliding surface and approaching rule are determined to obtain the dedicated control law for output voltage generated by the voltage source converter. Stability prove is theoretically conducted by using Lyapunov criterion followed by the upper limit calculation of corresponding convergence time, which reveals that finite-time tracking control can be realized. In addition, parameter varying for the control functions is numerically analyzed in order to provide a reference for further control design. At last, experimental and performance verification is carried out based on a prototype with a rated apparent power 2100 VA. The steady state and transient waveforms can confirm the feasibility and correctness of the sliding mode control strategy and theoretical analysis presented in this paper. © 2025 John Wiley & Sons Ltd.

关键词： Battery storage

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