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2019 IEEE PES Innovative Smart Grid Technologies Asia, ISGT 2019

作者： Xu, Xiaoyi Chen, Ning Qian, Shuangqiu Han, Hualing Zhao, Dawei Nantong Power Supply Company of State Grid Jiangsu Electric Power Company Nantong China State Key Laboratory of Operation and Control of Renewable Energy Storage Systems China Electric Power Research Institute Nanjing China Jiangsu Engineering Technology Research Center for Energy Storage Conversion and Application China Electric Power Research Institute Nanjing China

ISBN: (纸本)9781728135205

Future energy demand and increasing carbon emission requires an alternative source of energy. In recent few years, Use of DFIG based wind farm increased tremendously, thus effect of wind penetration on small signal stability of existing multi machine system need to be analyzed. In This paper effect of penetration of wind turbine with DFIG on stability performance of the IEEE 9 bus and 39 bus system has been investigated using DIgSILENT Powerfactory. It was observed that system with large number of buses is more stable with DFIG penetration then a small system. © 2019 IEEE.

关键词： Asynchronous generators

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Coordinated control strategy of a DC grid with energy storage system

Coordinated control strategy of a DC grid with energy storag...

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作者： Yang, Bo Sang, Bingyu Yang, Zhihan Li, Menbo Xiang, Wang Lu, Xiaojun Yao, Liangzhong Tao, Yibin School of Electrical Engineering Southeast University Nanjing China State Key Laboratory of Operation and Control of Renewable Energy ＆ Storage Systems China Electric Power Research Institute Beijing China China Electric Power Research Institute Nanjing China Jiangsu Engineering Technology Research Center for Energy Storage Conversion and Application China Electric Power Research Institute Nanjing China State Key Laboratory of Advanced Electromagnetic Engineering and Technology Huazhong University of Science and Technology Wuhan China

DC grid has a prospect of application in collecting and transmitting large-scale renewable energy over long distance. However, the randomness and fluctuation of the renewable power may hamper the stable operation of DC grid. energy storage device is able to actively absorb or supplement active power, which can be used to smooth the power fluctuation. The paper investigates a DC grid topology with energy storage and proposes a coordinated control strategy. The proposed strategy enables coordinated control of the renewable energy output power, pumped storage power and the grid consuming power. During the steady state, the control strategy enables the system DC voltage stable and power flow of the grid under zero-error control. During the faulted time, the coordinate control strategy enables the converter fast response and maintains the system DC voltage within safety margin. The effectiveness of the coordinated control strategy is verified by simulation in PSCAD/ EMTDC. © 2019 Institution of engineering and *** right reserved.

关键词： energy storage

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Construction of an example system for AC/DC hybrid power grid with high-proportion renewable energy

Construction of an example system for AC/DC hybrid power gri...

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作者： Zhao, Dawei Ma, Jin Qian, Minhui Zhu, Lingzhi Yao, Liangzhong Ding, Kun Han, Hualing State Key Laboratory of Alternate Electrical Power System with Renewable Energy Sources North China Electric Power University Changping District Beijing China State Key Laboratory of Operation and Control of Renewable Energy and Storage Systems Jiangsu Engineering Technology Research Center for Energy Storage Conversion and Application China Electric Power Research Institute Gulou District Nanjing China Wind Power Technology Center of Gansu Electric Power Company Qilihe District Lanzhou China

Large-scale wind and solar power generations have got rapid development in recent years in China and abroad. They always connect to load centres through high-voltage direct current (HVDC) transmission or ultra HVDC (UHVDC) transmission lines. Such systems are so large and it is necessary to make appropriate equivalence according to the purpose of different research. At present, the analysis model of this kind of real system is few, and simplified single-machine infinite-bus system or IEEE example system is adopted most of the time, which may affect the accuracy of analysis results. Here, the UHVDC project from a practical renewable energy base to load centres in China is chosen as an example, the actual structure and parameters are used to establish a typical example system for AC/DC hybrid power grid with high-proportion renewable energy. The new-generation synchronous condenser with large capacity and the supporting synchronous generators are all considered. First, the installed power generation, power grid structure, and load configuration of example system are introduced. Then the load flow distribution and transient stability characteristics are analysed by using DIgSILENT PowerFactory software. Finally, the feasibility of the proposed example system is shown by simulation results. © 2019 Institution of engineering and *** right reserved.

关键词： Electric load flow

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Virtual inertia control strategy of doubly-fed induction generator with additional inertia and damping torque 3

Virtual inertia control strategy of doubly-fed induction gen...

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3rd International Conference on New energy and Future energy System, NEFES 2018

作者： Ren, Q.Y. Qian, M.H. Zhu, C.L. Zhao, D.W. Liu, H.M. Zhu, L.Z. Li, G.J. College of Energy and Electrical Engineering Hohai University Nanjing211100 China State Key Laboratory of Operation and Control of Renewable Energy and Storage Systems China Electric Power Research Institute Beijing China Jiangsu Engineering Technology Research Center for Energy Storage Conversion and Application China Electric Power Research Institute Nanjing China

Doubly-fed induction generator (DFIG) with dual Pulse-Width Modulation (PWM) converter cannot maintain the active power balance or voltage stability of the power grid self-synchronously because of lacking mechanical inertia and mechanical damping. The virtual synchronous generator (VSG) technology can help solve this problem through simulating the mechanical equation and electromagnetic equation of synchronous generator to control the grid-connected converter. However, under the common first-order virtual inertia link used in the VSG control scheme, while DFIG providing active power support, there exists second frequency dip and the rotor speed recovers slowly, which is not conducive for DFIG to provide continuous and effective virtual inertia support. In order to overcome the drawbacks as well as avoid second frequency dip, this paper puts forward a virtual inertia control strategy of DFIG with additional inertia and damping torque. The additional torque is achieved by proportional-derivative (PD) controller with rotor slip as an input signal. Simulation results on DIgSILENT/powerfactory platform show that the proposed control strategy is effective to reduce frequency deviation and recover the rotor speed faster without second frequency dip phenomenon. © Published under licence by IOP Publishing Ltd.

关键词： Synchronous generators

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Analysis on application of a current-source Based DFIG Wind Generator Model

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CSEE Journal of Power and energy Systems 2018年第3期4卷 352-361页

作者： Jin Ma Dawei Zhao Liangzhong Yao Minhui Qian Koji Yamashita Lingzhi Zhu School of Electrical&Electronic Engineering North China Electric Power University(State Key Laboratory of Alternate Electrical Power System with Renewable Energy Sources)Beijing 102206China Renewable Energy Research Center China Electric Power Research Institute(State Key Laboratory of Operation and Control of Renewable Energy&Storage SystemsJiangsu Engineering Technology Research Center for Energy Storage Conversion and Application)Nanjing 210003China Power System Sector Central Research Institute of Electric Power IndustryTokyo 201-8511Japan

Models for simulation are vital for the authenticity of the *** doubly fed induction generation(DFIG)for power system stability analysis has attracted a great deal of research interests in the past few years due to the wide applications of DFIG in wind power *** models developed by the wind generator manufacturers are not only complicated,but also proprietary and very specific to their own *** simplified generic models have been *** them,the current-source based model is most widely used for power system stability *** validation work on this model so far has been based on the selected simulation scenarios or limited real ***,there has been no systematic and theoretic analysis on the validity of the current-source based model,which may cause inappropriate applications of this type of model in real engineering *** paper presents the conditions for using the current-source based model for power system stability analysis;then examines the model’s validity under symmetrical and asymmetrical fault *** practices for modeling and validating a real wind farm in North China confirm the validity analysis of this work on the current-source based DFIG model.

关键词： applicationanalysis current-source doublyfed induction generation(DFIG) modelvalidation

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A multi-level reactive power control strategy for PV power plant based on sensitivity analysis

A multi-level reactive power control strategy for PV power p...

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2018 China International Conference on Electricity Distribution, CICED 2018

作者： Minhui, Qian Qin, Hao Dawei, Zhao Chen, Ning Dajun, Jiang Ningbo, Wang Chen, Zhao Nanjing Jiangsu Province210003 China Changping District Beijing102206 China Jiangsu Engineering Technology Research Center for Energy Storage Conversion and Application China Electric Power Research Institute Nanjing Jiangsu Province210003 China Wind Power Technology Center of Gansu Electric Power Company Lanzhou Jiangsu Province730050 China

ISBN: (纸本)9781538667750

In order to make full use of the ability of photovoltaic (PV) units to regulate their own reactive power to participate in voltage stability control of power system, this paper takes full account of the interaction between power grid and PV power plant and proposes a multi-level reactive power control strategy based on sensitivity analysis for PV plant. Firstly, reference of reactive power is calculated combined with the analysis of reactive power and voltage sensitivity of PV power plant and the operation status of power grid. Secondly, reactive power command is allocated to each PV unit according to the reactive power margin. Finally, a reactive power control system model based on an actual PV plant project is established to verify the correctness of proposed strategy in this paper. © 2018 IEEE

关键词： Sensitivity analysis

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A Decentralized frequency regulation strategy of PV Power Plant based on droop control

A Decentralized frequency regulation strategy of PV Power Pl...

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2018 China International Conference on Electricity Distribution, CICED 2018

作者： Dawei, Zhao Minhui, Qian Ma, Jin Dajun, Jiang Maosheng, Ding Xiang, Li Nanjing Jiangsu Province210003 China Jiangsu Engineering Technology Research Center for Energy Storage Conversion and Application China Electric Power Research Institute Nanjing Jiangsu Province210003 China Changping District Beijing102206 China University of Sydney SydneyNSW2006 Australia State Grid Ningxia Electric Power Company Limited Yinchuan750001 China

ISBN: (纸本)9781538667750

In order to make full use of the active function of the photovoltaic (PV) power unit itself, a decentralized frequency regulation strategy for PV plant is proposed based on droop control idea in this paper. The active power regulation value, as an additional active power reference, is obtained according to the frequency regulation coefficient of PV unit;then the active power output of the PV unit is quickly regulated to the reference value, so that the frequency recovery of power system is restored. Since each PV unit in the power plant can achieve frequency regulation directly through the change of terminal frequency value, the response time will be faster than other control modes. Finally, a PV power plant which adopts the decentralized frequency regulation system is modelled on the DIgSILENT PowerFactory platform, and the control effect of the decentralized frequency regulation is verified by simulation results under different disturbances. © 2018 IEEE

关键词： Simulation platform

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Virtual inertia control strategy of doubly-fed induction generator with additional inertia and damping torque

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IOP Conference Series: Earth and Environmental Science 2018年第1期188卷

作者： Q Y Ren M H Qian C L Zhu D W Zhao H M Liu L Z Zhu G J Li College of Energy and Electrical Engineering Hohai University Nanjing 211100 China State Key Laboratory of Operation and Control of Renewable Energy & Storage Systems China Electric Power Research Institute Beijing China Jiangsu Engineering Technology Research Center for Energy Storage Conversion and Application China Electric Power Research Institute Nanjing China

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