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Adaptive virtual synchronous generator Considering Converter and Storage Capacity Limits

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CSEE Journal of Power and Energy Systems 2022年第2期8卷 580-590页

作者： Junru Chen Muyang Liu Federico Milano Terence O’Donnell the School of Electrical Engineering Xinjiang UniversityUrumqi 830049Xinjiang Uygur Autonomous RegionChina the School of Electronic and Electrical Engineering University College DublinDublinIreland the Electrical Engineering Department University College DublinDublin 4Ireland

A virtual synchronous generator(VSG)control has been proposed as a means to control a voltage source converter interfaced generation and storage to retain the dynamics of a conventional synchronous *** storage is used to provide the inertia power and droop power in the VSG control to improve the frequency *** the parameters in the VSG control can be varied,it is necessary for it to be tuned to be adaptive,in order to achieve an optimal response to grid frequency ***,the storage cannot provide infinite power and the converter has a strict power limitation which must be *** adaptive VSG control should consider these limitations,which have not been considered *** paper proposes an adaptive VSG control aimed at obtaining the optimal grid supporting services during frequency transients,accounting for converter and storage capacity *** proposed control has been validated via hardware-in-the-loop *** is then implemented in storage co-located with wind farms in a modified IEEE 39-bus *** results show that the proposed control stabilizes the system faster and has better cooperation with other VSGs,considering storage and converter limits.

关键词： Adaptive control converter capacity state of storage virtual synchronous generator

Research on Control Strategy of Grid-connected Brushless Doubly-fed Wind Power System Based on virtual synchronous generator Control

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CES Transactions on Electrical Machines and Systems 2022年第4期6卷 404-412页

作者： Shuai Liang Shi Jin Long Shi Shenyang University of Technology Shenyang110870China IEEE

The brushless doubly-fed wind power system based on conventional power control strategies lacks ‘inertia’ and the ability to support grid,which leads to the decline of grid ***,a control strategy of brushless doubly-fed reluctance generator(BDFRG) based on virtual synchronous generator(VSG) control is proposed to solve the problem in this *** output characteristics of BDFRG based on VSG are similar to a synchronous generator(SG),which can support the grid frequency and increase the system ‘inertia’.According to the mathematical model of BDFRG,the inner loop voltage source control of BDFRG is *** addition,the specific structure and parameter selection principle of outer loop VSG control are *** voltage source control inner loop of BDFRG is combined with the VSG control outer loop to establish the overall architecture of BDFRG-VSG control ***,the effectiveness and feasibility of the proposed strategy are verified in the simulation.

关键词： virtual synchronous generator Brushless doubly-fed relutance generator Grid support ability Voltage source control

A weighted voltage model predictive control method for a virtual synchronous generator with enhanced parameter robustness

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Protection and Control of Modern Power Systems 2021年第1期6卷 482-492页

作者： Leilei Guo Zhiye Xu Nan Jin Yanyan Li Wei Wang College of Electric and Information Engineering Zhengzhou University of Light IndustryZhengzhouChina

To address the problem of insufficient system inertia and improve the power quality of grid-connected inverters,and to enhance the stability of the power system,a method to control a virtual synchronous generator(VSG)output voltage based on model predictive control(MPC)is *** of the inductors,capacitors and other components of the VSG can vary as the temperature and current *** the VSG output voltage and power control accuracy using the conventional MPC method may be *** this paper,to improve the parameter robustness of the MPC method,a new weighted predictive capacitor voltage control method is *** detailed theoretical analysis,the principle of the proposed method to reduce the influence of parameter errors on voltage tracking accuracy is ***,the effectiveness and feasibility of the proposed method are verified by experimental tests using the Typhoon control hardware-in-the-loop experimental platform.

关键词： virtual synchronous generator Model predictive control Optimal voltage vector Parameter error compensation

Instantaneous power calculation based on intrinsic frequency of single-phase virtual synchronous generator

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Journal of Modern Power Systems and Clean Energy 2017年第6期5卷 970-978页

作者： Yangyang ZHAO Jianyun CHAI Shien WANG Kai SUN The State Key Lab of Power Systems Department of Electrical EngineeringTsinghua UniversityBeijingChina

In order to enhance the stability of single-phase microgrid,virtual synchronous generator(VSG)control method is investigated in this *** electromagnetic model and electromechanical model are established to illustrate the performance of *** the 2 nd fluctuation of fundamental-frequency in the output power,an instantaneous power calculation strategy is proposed based on the intrinsic frequency of single-phase ***,a virtual power calculation method is presented to achieve islanded/grid-connected seamless *** analysis and comparison simulation results demonstrate the correctness of the presented power calculation *** last,the effectiveness of the proposed approach is verified by comparison experiments of islanded/gridconnected operations in a 500 VA single-phase inverter.

关键词： virtual synchronous generator Single phase inverter Instantaneous power calculation Seamless transition

virtual synchronous generator Based Current synchronous Detection Scheme for a virtual Inertia Emulation in SmartGrids

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Energy and Power Engineering 2019年第3期11卷 99-131页

作者： Arvind Parwal Martin Fregelius Dalmo Cardosa Silva Tatiana Potapenko Johannes Hjalmarsson James Kelly Irina Temiz Janaina Goncalves de Oliveira Cecilia Bostrom Mats Leijon Division of Electricity Department of Engineering SciencesUppsala UniversityUppsalaSweden Department of Electrical Engineering Universidade Federal de Juiz de ForaJuiz de ForaBrazil MaREI—Centre for Marine and Renewable Energy Ireland University College CorkCorkIreland Department of Electrical Engineering Chalmers University of TechnologyGothenburgSweden

Renewable energy sources, such as photovoltaic wind turbines, and wave power converters, use power converters to connect to the grid which causes a loss in rotational inertia. The attempt to meet the increasing energy demand means that the interest for the integration of renewable energy sources in the existing power system is growing, but such integration poses challenges to the operating stability. Power converters play a major role in the evolution of power system towards SmartGrids, by regulating as virtual synchronous generators. The concept of virtual synchronous generators requires an energy storage system with power converters to emulate virtual inertia similar to the dynamics of traditional synchronous generators. In this paper, a dynamic droop control for the estimation of fundamental reference sources is implemented in the control loop of the converter, including active and reactive power components acting as a mechanical input to the virtual synchronous generator and the virtual excitation controller. An inertia coefficient and a droop coefficient are implemented in the control loop. The proposed controller uses a current synchronous detection scheme to emulate a virtual inertia from the virtual synchronous generators. In this study, a wave energy converter as the power source is used and a power management of virtual synchronous generators to control the frequency deviation and the terminal voltage is implemented. The dynamic control scheme based on a current synchronous detection scheme is presented in detail with a power management control. Finally, we carried out numerical simulations and verified the scheme through the experimental results in a microgrid structure.

关键词： Current synchronous Detection Dynamic Droop Control Energy Storage virtual Inertia virtual synchronous generator

PV-based virtual synchronous generator with variable inertia to enhance power system transient stability utilizing the energy storage system

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Protection and Control of Modern Power Systems 2017年第1期2卷 428-435页

作者： Ju Liu Dongjun Yang Wei Yao Rengcun Fang Hongsheng Zhao Bo Wang State Grid Hubei Economic Research Institute WuhanChina State Key Laboratory of Advanced Electromagnetic Engineering and Technology and School of Electrical and Electronic EngineeringHuazhong University of Science and TechnologyWuhanChina.

The Photovoltaic(PV)plants are significantly different from the conventional synchronous generators in terms of physical and electrical characteristics,as it connects to the power grid through the voltage-source *** penetration PV in power system will bring several critical challenges to the safe operation of power grid including transient *** address this problem,the paper proposes a control strategy to help the PVs work like a synchronous generator with variable inertia by energy storage system(ESS).First,the overall control strategy of the PV-based virtual synchronous generator(PV-VSG)is *** the control strategies for the variable inertia of the PV-VSG are designed to attenuate the transient energy of the power system after the *** results of a simple power system show that the PV-VSG could utilize the energy preserved in the ESS to balance the transient energy variation of power grid after fault and improve the transient stability of the power system.

关键词： Energy storage system virtual synchronous generator Variable inertia Transient stability Photovoltaic power

Control Strategy for Inverter Parallel and Parallel with synchronous generator Based on virtual synchronous generator Theory

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Control Strategy for Inverter Parallel and Parallel with Syn...

Distributed Power Generation virtual synchronous generator Control Design and Analysis

第36届中国控制会议

作者： Kewen Lin Fei Xiao Guisheng Jie Changwu Hou Ruitian Wang National Key Laboratory of Science and Technology on Vessel Integrated Power System Naval University of Engineering

ISBN: (纸本)9781538629185

With the development of electrical control technology and the need of environmental protection,the marine shaft generating system based on PWM technology is developed and *** shaft generator system,inverters parallel and parallel of inverter and diesel generator are key ***,the paper proposes a control strategy based on virtual synchronous generator theory that simulates the large inertia and the output impedance characteristics of the synchronous generator to solve these *** this paper,the mathematical model of the inverter and the overall control block diagram of the inverter are introduced and the control model of the virtual synchronous generator is *** Simulation using Matlab and real-time simulation system of the parallel operation of inverters and parallel operation of inverter and diesel generator are carried *** simulation results show that the control strategy is feasible.

关键词： marine power system inverter double-loop control virtual synchronous generator real-time simulation

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Distributed Power Generation Virtual Synchronous Generator C...

Low-Frequency Oscillation Analysis of Grid-Connected VSG System Considering Multi-Parameter Coupling

第40届中国控制会议

作者： Shuai TANG Longbo MAO Wenqiang WANG Haoxiang GENG Weijun WANG Institute of New Energy Technology Academy of Systems Engineering Academy of Military Sciences Department of Military Installations Army Logistics University of PLA

The technology of virtual synchronous generator（VSG）, which can make the inverter connected to distributed generation work like traditional synchronous generator, plays an important role in improving the stability of the power system because of its good voltage and frequency supporting capability. In this paper, an improved VSG control method is proposed,which can ensure seamless transfer between grid-connected and stand-alone modes, and achieve accurate tracking control of active and reactive power. The control topology and mathematical model of VSG are constructed firstly based on the rotation equation and electrical equation of synchronous generator;then, the corresponding VSG active-frequency droop control, reactivevoltage droop control and inner loop voltage-current control are designed, and the influences of key parameters are analyzed through frequency domain method. Finally, two simulations with different operation modes and loads are conducted to verify the effectiveness in Matlab/Simulink environment, and the results show that the performance is well.

关键词： virtual synchronous generator Grid-connected mode Stand-alone mode Droop control Power tracking

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Computer Modeling in Engineering & Sciences 2023年第6期135卷 2373-2386页

作者： Shengyang Lu Tong Wang Yuanqing Liang Shanshan Cheng Yupeng Cai Haixin Wang Junyou Yang Yuqiu Sui Luyu Yang Shenyang University of Technology Shenyang110870China Electric Power Research Institute of State Grid Liaoning Electric Power Supply Co. Ltd.Shenyang110006China State Grid Liaoning Electric Power Supply Co. Ltd.Shenyang110006China

With the increasing integration of new energy generation into the power system and the massive withdrawal of traditional fossil fuel generation,the power system is faced with a large number of stability *** phenomenon of low-frequency oscillation caused by lack of damping and moment of inertia is worth *** recent years,virtual synchronous generator(VSG)technique has been developed rapidly because it can provide considerable damping and moment of *** improving the stability of the system,it also inevitably causes the problem of active power oscillation,especially the low mutual damping between the VSG and the power grid will make the oscillation more *** traditional time-domain state-space method cannot reflect the interaction among state variables and study the interaction between different nodes and branches of the power *** this paper,a frequency-domain method for analyzing low-frequency oscillations considering VSG parameter coupling is ***,based on the rotor motion equation of the synchronous generator(SG),a secondorder VSG model and linearized power-frequency control loop model are ***,the differences and connections between the coupling of key VSG parameters and low-frequency oscillation characteristics are studied through frequency domain *** path and influencemechanism of a VSG during low-frequency power grid oscillations are ***,the correctness of the theoretical analysis model is verified by simulation.

关键词： Inverter power supply low-frequency oscillation virtual synchronous generator rotor motor equation