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Generalized coupling resonance modeling, analysis, and active damping of multi-parallel inverters in microgrid operating in grid-connected mode

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Journal of modern Power Systems and Clean Energy 2016年第1期4卷 63-75页

作者： Zhiyong CHEN Yandong CHEN Josep M.GUERRERO Huimin KUANG Yuan HUANG Leming ZHOU An LUO National Electric Power Conversion and Control Engineering Technology Research Center Hunan UniversityChangshaChina Department of Energy Technology Aalborg UniversityAalborg East 9220Denmark

This paper firstly presents an equivalent coupling circuit modeling of multi-parallel inverters in microgrid operating in grid-connected mode. By using the model, the coupling resonance phenomena are explicitly investigated through the mathematical approach, and the intrinsic and extrinsic resonances exist widely in microgrid.Considering the inverter own reference current, other inverters reference current, and grid harmonic voltage, the distributions of resonance peaks with the growth in the number of inverters are obtained. Then, an active damping control parameter design method is proposed to attenuate coupling resonance, and the most salient feature is that the optimal range of the damping parameter can be easily located through an initiatively graphic method. Finally,simulations and experiments verify the validity of the proposed modeling and method.

关键词： Microgrid grid-connected mode Multi-parallel inverters Active damping Coupling resonance

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Study on the Energy Dispatch Strategy of PV Power Plant

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电脑知识与技术 2012年第23期08卷 5697-5700页

作者： LIU Shu-ping,MA Jiao-jiao(North China Electric Power University,Baoding 071003,China) North China Electric Power University Baoding 071003 China

Now the energy efficiency of the PV power plant is low.For this case,this paper presents a PV power plant energy scheduling strategy.It includes new grid scheme and scheduling algorithm.Through the establishment of PV power station network model and the method of computer simulation of its scheduling algorithm,this paper describes its realization way,and then proves that the scheduling strat egy is correct and the effectiveness of improving energy conversion rate.At the same time,the PV power station scheduling strategy aslo re duces the environmental pollution,and alleviates the energy crisis and environmental crisis.

关键词： photovoltaic power plant grid-connected mode scheduling algorithm energy efficiency

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Study on the Energy Dispatch Strategy of PV Power Plant

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电脑知识与技术（过刊） 2012年第8X期18卷 5697-5700页

作者： LIU Shu-ping,MA Jiao-jiao(North China Electric Power University,Baoding 071003,China)

关键词： photovoltaic power plant grid-connected mode scheduling algorithm energy efficiency

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Research on User-side Distributed Power System Control Strategy

Research on User-side Distributed Power System Control Strat...

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The 2012 International Conference on Advanced Material and Manufacturing Science(ICAMMS 2012)

作者： Mingming Pan Shiming Tian China Electric Power Research Institute

Distributed power system,especially the distributed power and micro-grid system in the mountain villages,islands and remote areas,has many advantages,which can be used as an effective supplement of grid to help solve the problem of electricity supplyThe connected-grid inverter needs to be able to work in both grid mode and island operation mode in order to ensure the safety of the local critical loadThe paper proposed the seamless switching control strategy for two modes of switchingThe experimental results verify the property of the topology structure and control strategy

关键词： photovoltaic generation grid-connected mode island operation model seamless switching

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Distributed Power Generation Virtual Synchronous Generator Control Design and Analysis

Distributed Power Generation Virtual Synchronous Generator C...

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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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