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Low-frequency Oscillations and Resonance Analysis of VSG-controlled PMSG-based Wind Generation Systems

Journal of Modern power Systems and Clean Energy 2025年第1期13卷 115-127页

作者： Yizhuo Ma Jin Xu Chenxiang Gao Guojie Li keyou Wang Key Laboratory of Control of Power Transmission and Conversion Ministry of Education Shanghai Jiao Tong UniversityShanghaiChina

With good adaptability to weak power grids,the grid-forming inverter becomes the foundation of future power grids with high-proportion renewable ***,the virtual synchronous generator(VSG)control is recognized as the mainstream control strategy for grid-forming *** permanent magnet synchronous generator(PMSG)based wind generation systems connected to power grid via VSG-controlled grid-forming inverters,some novel impacts on the low-frequency oscillations(LFOs)emerge in power *** first impact involves the negative/positive damping effect on *** this paper,the small-signal torque model of VSG-controlled PMSGbased wind generation systems is established based on the damping torque analysis method,revealing the influence mechanism of machine-side dynamics on LFOs and proving the necessity of the double-mass model for accurate stability *** second impact is the resonance effect between torsional oscillation and ***,this paper uses the open-loop resonance analysis method to study the resonance mechanism and to predict the root ***,a damping enhancement strategy is proposed to weaken and eliminate the negative damping effect of machine-side dynamics on LFOs and the resonance effect between torsional oscillation and ***,the analysis result is validated through a case study involving the connection of the VSG-controlled PMSG-based wind generation system to the IEEE 39-bus AC grid,supporting the industrial application and stable operation of VSG-controlled PMSGbased wind generation systems.

关键词： Grid-forming inverter low-frequency oscillation(LFO) modal resonance permanent magnet synchronous generator(PMSG) torsional oscillation virtual synchronous generator(VSG).

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Multi-time Collaborative Restoration for Integrated Electrical-gas Distribution Systems Based on Rolling Optimization

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CSEE Journal of power and Energy Systems 2024年第2期10卷 660-671页

作者： Jingyang Yun Zheng Yan Yun Zhou Peichao Zhang Weidong Hu Key Laboratory of Control of Power Transmission and Conversion of Ministry of Education Department of Electrical EngineeringShanghai Jiao Tong University

This paper proposes a multi-time collaborative restoration model for integrated electricity-gas distribution sys-tems(IEGDSs)considering multiple resources after extreme weather *** on the linearized power flow constraints of the unbalanced electrical distribution system(EDS)and gas distribution system(GDS),this problem can be formulated as a mixed-integer linear programming(MILP)*** improve the efficiency and veracity of the solution,a rolling optimiza-tion based two-stage method is developed with the first stage solved by a linear approximation model,and the second stage solved by real-time updated rolling *** solving the MILP problem using rolling optimization,the proposed model and solution method achieve efficient and reliable collaborative restoration of IEGDS considering multiple resources and unbal-anced operation characteristics of *** effectiveness of the proposed model and method is validated by using an IEGDS made of a 37-bus unbalanced EDS and 11-node *** Terms-Electricity-gas system,mix-integer linear programming,power system restoration.

关键词： Electricity-gas system mix-integer linear programming power system restoration

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Complementary Operations of Multi-renewable Energy Systems with Pumped Storage

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CSEE Journal of power and Energy Systems 2023年第5期9卷 1866-1880页

作者： Zean Zhu Lingling Wang Xu Wang Chuanwen Jiang Shichao Zhou Kai Gong Key Laboratory of Control of Power Transmission and conversion Shanghai Jiao Tong UniversityShanghai 200240China

Complementarity is an important attribute among different renewable energy sources(RESs).A multi-renewable energy system(MRES)offers an alternative to aggregate diverse RESs and can ensure the best attributes of their mutual ***,few papers conduct convincing research into the complementary operation of a *** paper investigates the complementarities in a MRES that contains wind,photovoltaic,run-off hydro,pumped storage power plants and incorporates complementarity into the optimal operation of a *** complementarity is theoretically summarized and first classified into two categories:natural and *** effectively capture the uncertainty and complementarity of RESs,the time-dependent clustering simulation technique is employed to generate their *** equivalent runoff hydropower plant index is proposed,based on which a novel complementary operation model,that considers volatility and self-sufficient adequacy,is *** are presented and compared in a case study,which demonstrate the validity and scalability of the proposed methodology,reveals the complementarities under multiple time-scales,and illustrates the significance of complementary operations.

关键词： Complementarity multi-renewable energy system optimal operation multi time-scale fuzzy-c means clustering

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Hybrid Flow Model of Cyber Physical Distribution Network and an Instantiated Decentralized control Application

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CSEE Journal of power and Energy Systems 2024年第6期10卷 2587-2596页

作者： Guanhong Chen Dong Liu Key Laboratory of Control of Power Transmission and Conversion Ministry of EducationDepartment of Electrical EngineeringShanghai Jiao Tong UniversityShanghai 200240China

With the access to large amounts of renewable energy sources(RES),operation uncertainty of distribution networks increases ***,adopting advanced information and communication technology,a cyber-physical distribution network(CPDS)provides the possibility to solve this problem via aggregative management of decentralized controllable ***,information flow in cyber space deeply interacts with energy flow in physical space,leading to a complexity in modeling,design and analysis of the whole control *** deal with this problem,a general hybrid flow model of CPDS is first proposed in this *** this model,the control process is abstracted into interactions among three types of cyber nodes through cyber *** mathematic model of cyber nodes and branches is developed as well as that of the controlled physical object for hybrid flow ***,based on the hybrid model,an instantiated application to compensate feeder power deviation caused by RES fluctuation through aggregative control of large-scale air-conditioners(ACs)is *** this application,coordinative control of the AC cluster is achieved through a decentralized control strategy with very little communication cost and very good privacy *** of numerical examples verify the correctness and flexibility of the hybrid flow model in reflecting interactions between cyber flow and energy flow as well as system *** proposed decentralized control strategy of the AC cluster is also proven to be effective and robust in FCE compensation.

关键词： Air-conditioner load cyber physical distribution network decentralized control feeder control error hybrid flow model mixed logical dynamic renewable energy source

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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年第2期25卷 223-231页

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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Intelligent Demand Response Resource Trading Using Deep Reinforcement Learning

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CSEE Journal of power and Energy Systems 2024年第6期10卷 2621-2630页

作者： Yufan Zhang Qian Ai Zhaoyu Li Key Laboratory of Control of Power Transmission and Conversion Ministry of EducationDepartment of Electrical EngineeringShanghai Jiao Tong UniversityShanghai 200240China.

With the liberalization of the retail market,customers can sell their demand response(DR)resources to the distribution company(Disco)through the DR aggregator(DRA).In this paper,an intelligent DR resource trading framework between Disco and DRA is proposed by exploiting the benefits of deep reinforcement learning(DRL).The hierarchical decision process of the two players is modeled as a Stackelberg *** the game,Disco is the leader who determines the retail price while DRA is the follower who responds to *** protect their privacy,a dueling deep Q-network(dueling DQN)is then constructed to model the bi-level Stackelberg game,such that the lower-level problem doesn’t need to reveal its detailed model to the *** the learning process,the uncertainties from the DRA’s baseline load and wind power are *** order to boost the robustness against the estimation error,the baseline load is discretized into symbols before being used as the input states of the dueling *** to mitigate the uncertainty of wind power,the scenario-based method is introduced when designing the *** demonstrate that the proposed dueling DQNbased method has good performance and is more robust against uncertainties.

关键词： Demand response economic interaction reinforcement learning stackelberg game uncertainty

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Design of a High Precision Multichannel 3D Bioprinter

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Chinese Journal of Mechanical Engineering 2023年第6期36卷 127-146页

作者： Jintao Li Bin Zhang Yichen Luo Huayong Yang State Key Laboratory of Fluid Power Transmission and Control School of Mechanical EngineeringZhejiang UniversityHangzhou 310027China

Three-dimensional(3D)printing technology is expected to solve the organ shortage ***,owing to the accuracy limitations,it is difficult for the current bioprinting technology to achieve an accurate control of the spatial position and distribution of a single cell or single component *** this study,to accurately achieve the directional deposition of different cells and biological materials in the spatial position for the construction of large transplantable tissues and organs,a high-precision multichannel 3D bioprinter with submicron-level motion accuracy is designed,and concurrent and synergistic printing methods are *** on the high-precision motion characteristics of the gantry structure and the requirements of concurrent and synergistic printing,a 3D bioprint-ing system with a set of 6 channels is designed to achieve six-in-one *** on the Visual C++environ-ment,a control system software that integrates the programmable multi-axis controller(PMAC)motion,pneumatic,and temperature control subsystems was developed and ***,based on measurements and experiments,the 3D bioprinter and its control system was verified to fulfil the requirements of multichannel,concurrent,and syn-ergistic printing with submicron-level motion accuracy,significantly shortening the printing time and improving the printing *** study not only provides an equipment basis for printing complex heterogeneous tissue structures,but also improves the flexibility and functionality of bioprinting,and ultimately makes the construction of complex multicellular tissues or organs possible.

关键词： 3D bioprinting High precision Concurrent and synergistic printing Multichannel control system Six-in-one printing

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Novel Optimal Dispatch Method for Multiple Energy Sources in Regional Integrated Energy Systems Considering Wind Curtailment

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CSEE Journal of power and Energy Systems 2024年第5期10卷 2166-2173页

作者： Yang Gao Qian Ai Key Laboratory of Control of Power Transmission and Conversion Ministry of EducationShanghai Jiao Tong UniversityShanghai 200240China

power-to-gas technology uses temporary surplus electricity to create either renewable hydrogen or renewable natural gas,which can then be stored in natural-gas pipelines and used when *** a result,P2G transforms conventional one-way coupling of a power/heat/natural-gas system into twoway ***,its operating characteristics makes it possible to more effectively utilize *** paper describes a new optimal dispatch model for integrated electricity/gas/heat energy *** model considers the effective use of surplus wind-energy with electricity-to-gas ***,a multi-energy network model is built,taking into account both equipment and network ***,we apply a novel two-layer optimization method,which uses P2G,to“absorb”wind *** the top-layer model is used for the dayahead dispatch of the natural-gas network containing P2G,the bottom-layer model describes the day-ahead economic dispatch of the electricity/heat system,which includes wind *** on the Karush-Kuhn-Tucher conditions of the bottom-layer model,the two-layer model is transformed into a single-layer model,and we linearize the nonlinear equation to convert the nonlinear model into a mix-integer linear programming problem,which is solvable using the General Algebraic Modeling ***,numerical case-studies are performed to evaluate the accuracy and effectiveness of the proposed method.

关键词： Multi-enery coupling power-to-gas two-layer optimization wind-power consumption

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Thyristor-inserted MMC Sub-module Topology with DC Fault Blocking Capability

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CSEE Journal of power and Energy Systems 2024年第5期10卷 2221-2229页

作者： Cheng Peng Rui Li Xu Cai Key Laboratory of Control of Power Transmission and Conversion Shanghai Jiao Tong UniversityMinistry of EducationShanghai Jiao Tong UniversityShanghai 200240China.

Modular multilevel converter(MMC)is increasingly being applied to high voltage direct current(HVDC)***,dc short circuit situations restrain the application of a conventional half bridge MMC *** this paper,a new sub-module topology with inserted thyristor can help the MMC system clear a dc side *** states and devices voltage stress of the proposed topology are analyzed and the conduction loss comparison between the proposed topology with several existing topologies with dc fault blocking capability is carried *** show the proposed topology is superior to other topologies in terms of conduction loss while using the same voltage rating ***,compared with traditional half bridge topology,only thyristors and diodes are added in the proposed ***,cost of the proposed topology can be lower than conventional hybrid MMC *** last,the fault blocking capability of the proposed topology is verified in the simulation.

关键词： Fault current limiting high voltage direct current(HVDC)transmission modular multilevel converter(MMC)

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Regional Integrated Energy System Resilience Enhancement Strategy at the Integrated Stage of Disaster Response and Post-Disaster Recovery

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Journal of Shanghai Jiaotong University (Science) 2024年 1-13页

作者： You, Minghao Gu, Jie Liu, Shuqi Key Laboratory of Control of Power Transmission and Conversion of Ministry of Education Shanghai Jiao Tong University Shanghai200240 China

Deployment of integrated energy system is conducive to improving energy efficiency and achieving the transformation of the global energy system. However, recent appearance of extreme natural disasters poses a great challenge to the safe and stable operation of the integrated energy system. Therefore, the resilience of the integrated energy system, namely the ability to anticipate, withstand, respond to and recover to normal state, is to be enhanced urgently. This paper proposes a master-slave optimization model for the resilience enhancement of integrated energy system in the integrated stage of disaster response and post-disaster recovery, in view of the strong correlation between the two stages. The master model develops the optimal fault repair plan, and the sub model determines the optimal energy supply recovery scheme. Based on the master-slave model, which adopts the repair and operation state of the component as coupling variables, a coordinated optimization framework is constructed. Then, the master-slave model is merged into a two-stage robust optimization model for iterative solution in order to develop the optimal fault repair strategy and energy supply recovery scheme of the integrated energy system, enhancing its resilience in the integrated stage of disaster response and post-disaster recovery. © Shanghai Jiao Tong University 2024.

关键词： Optimization

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