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IEEE Conference on energy Internet and energy System Integration

作者： Chao Liu Yan Li Xinshou Tian Yuanyuan Su Pengfei Zhang China Electric Power Research Institute State Key Laboratory of Operation and Control of Renewable Energy & Storage Systems Department of Development and Planning State Grid Corporation of China (SGCC)

ISBN: (纸本)9781538614280

renewable energy develops very fast in China, and China has become the largest and fastest growing country of wind and PV power in the world. But the distribution of the wind/solar energy and load center is disharmonious, with the major wind fields and the solar fields being distributed in the area which is short of load, and making large-scaled, long-distance wind and PV power transmission is imperative. The problem of stability of large-scale wind and PV power grid integrated system into the high impedance weak grid is becoming more and more important. In order to shorten the electrical distance for wind power integration, the use of series compensation technology is an economically viable approach. In this paper, operation characteristics and output capacity of large-scale wind power base transmission system with series compensation will be studied. Based on the analysis of the load flow distribution and voltage characteristics of large-scale wind power base, the influence of different grid integration impedance, wind power output level and reactive power control mode of wind turbine on the operation range of wind power base should be studied, and the paper also analyzes the influence of different series compensation capacities on the voltage stability margin of large-scale wind power output system, and studies the effect of different series compensation on the delivery capacity of large-scale wind power base integrated to weak power system through sensitivity analysis. Considering the reactive power control capability of the wind turbine, the operation range of the parallel reactive power compensation in the wind farm, and the reactive power and voltage characteristics of the system after the installation of series compensation, the reactive power and voltage coordination control of the large wind power base scheme will be proposed in the paper.

关键词： Large-scale wind power base Series compensation operation characteristics Output capacity

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Implementation and value of power hardware in the loop testing bed for wind turbines integrated into grid

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The Journal of Engineering 2017年第13期2017卷 1635-1639页

作者： Kui Luo Wenhui Shi Haiyan Tang State Key Laboratory of Operation and Control of Renewable Energy & Storage System China Electric Power Research Institute (CEPRI) Beijing 100192 People's Republic of China

Wind power providing grid support is an interesting topic for the power grid stable operation, due to the large-scale power electronics devices integrated, advanced simulation and experiment methods are required to deal with the complexity. This study presents a power hardware in the loop (PHIL) testing bed implementation method for wind turbines grid integration. The components (emulated physical wind turbine, real-time simulator and power interface) and the configuration of the testing bed are listed from the view point of power flow and signal flow. Stability, accuracy, and safety considerations for the implementation of wind turbine PHIL testing bed are proposed, in order to accurately emulate the system and wind turbine behaviours. Inertial control strategies of wind turbines are validated, and simulation results show the value of PHIL simulation testing bed, which can be a useful tool for testing and evaluation of the electromechanical transient dynamic interaction between wind turbine/wind power plant with advanced functions and power system.

关键词： wind turbines wind power plants load flow stability power generation control power grids wind turbine behaviours inertial control strategies power system electromechanical transient dynamic interaction PHIL simulation testing bed stability considerations accuracy considerations safety considerations signal flow power flow power hardware in the loop testing bed implementation method experiment methods advanced simulation power grid stable operation large-scale power electronics devices grid support

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Voltage balance optimisation among subsystems of wind-photovoltaic-ES hybrid generating system

Voltage balance optimisation among subsystems of wind-photov...

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6th International Conference on renewable Power Generation

作者： Wu, Han Li, Yan Lu, Zongxiang Tang, Haiyan State Key Lab of Control and Simulation of Power Systems and Generation Equipments Dept. of Electrical Engineering Tsinghua University Haidian District Beijing100084 China North China Electric Power Research Institute Co. Ltd Beijing100045 China State Key Laboratory of Operation and Control of Renewable Energy and Storage Systems China Electric Power Research Institute Haidian District Beijing100192 China

Wind-photovoltaic-energy storage (ES) hybrid generating system has numerous reactive power sources. It is crucially important for coordinated control of these reactive power sources. According to the test results, there are unbalanced control problem in subsystem voltage of the hybrid generating system. The problem caused reactive power circulation and loop current. A subsystem voltage balance optimisation strategy is proposed to solve the problem. The case study shows the efficiency of the proposed strategies. © 2017 Institution of Engineering and Technology. All rights reserved.

关键词： Reactive power

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Probabilistic Harmonic Analysis on Distributed Photovoltaic Integration Considering Typical Weather Scenarios

Probabilistic Harmonic Analysis on Distributed Photovoltaic ...

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2017 2nd Asia Conference on Power and Electrical Engineering (ACPEE2017)

作者： Che Bin Yu Ruoying Dang Dongsheng Wang Xiangyan State Grid Ningxia Electric Power Company Economic Research Institute State Key Laboratory of Operation and Control of Renewable Energy & Storage Systems China Electric Power Research Institute

Distributed Generation(DG) integrating to the network would cause the harmonic pollution which would cause damages on electrical devices and affect the normal operation of power system. On the other hand, due to the randomness of the wind and solar irradiation, the output of DG is random, too, which leads to an uncertainty of the harmonic generated by the DG. Thus, probabilistic methods are needed to analyse the impacts of the DG integration. In this work we studied the harmonic voltage probabilistic distribution and the harmonic distortion in distributed network after the distributed photovoltaic(DPV) system integrating in different weather conditions, mainly the sunny day, cloudy day, rainy day and the snowy day. The probabilistic distribution function of the DPV output power in different typical weather conditions could be acquired via the parameter identification method of maximum likelihood estimation. The Monte-Carlo simulation method was adopted to calculate the probabilistic distribution of harmonic voltage content at different frequency orders as well as the harmonic distortion(THD) in typical weather conditions. The case study was based on the IEEE33 system and the results of harmonic voltage content probabilistic distribution as well as THD in typical weather conditions were compared.

关键词： Monte Carlo THD DPV Probabilistic Harmonic Analysis on Distributed Photovoltaic Integration Considering Typical Weather Scenarios

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A Dynamic Adaptive Algorithm for Statistical Up-scaling based Short-term Wind Power Prediction of Regions

A Dynamic Adaptive Algorithm for Statistical Up-scaling base...

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2017 International Electrical and energy Conference (CIEEC 2017)

作者： Xiaosheng Peng Yuzhu chen Jianfeng Che Bo Wang School of Electrical and Electronic Engineering Huazhong University of Science and Technology State Key Laboratory of Operation and Control of Renewable Energy & Storage Systems China Electric Power Research Institute

Wind Power Prediction（WPP） of regions is beneficial for the department of power grid dispatching to evaluate the wind power output characteristics from a global perspective and to formulate a scientific and reasonable scheduling scheme for power *** statistical up-scaling based WPP of regions is one of the most popular methods,which has been widely applied by the industrial *** selection of reference wind farms is one of the key factors of the statistical up-scaling method based WPP of ***,most of the methods for the selection of reference wind farms are not flexible,which restrict the improvement of the WPP accuracy,as the weather of wind farm sub-regions are always *** overcome the challenge,a dynamic adaptive algorithm based WPP of regions is presented in the paper,in terms of the dynamic selection of reference wind farms,the dynamic selection of the WPP methods based on the classification of the weather types of the wind farms and the dynamic selection of the up-scaling *** results show that the proposed method is with higher accuracy than the traditional statistical up-scaling based WPP of regions and is applicable for industrial WPP of regional wind farms.

关键词： Wind Power Prediction of Regions Dynamic Adaptive Algorithm Statistical Up-scaling Short-term

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A comparison study of the application of data assimilation in the short-term prediction of radiation and precipitation

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IOP Conference Series: Earth and Environmental Science 2018年第1期136卷

作者： Huang Ding Fang Cui Zhijia Wang Hai Zhou Weidong Chen Renewable Energy Center China Electric Power Research Institute Nanjing China State Key Laboratory of Operation and Control of Renewable Energy & Storage Systems China Electric Power Research Institute Beijing China

Based on the meteorological observation of the DG plants in East China, the assimilation effect of the WRF in the summer of 2016 was studied. The results show that, in the case of using data assimilation, the model correctly predicted the occurrence time of precipitation, as well as the variation of the precipitation along with the time were well consistent with the observations, which gives more accurate downward shortwave radiation. The application of data assimilation techniques can provide reliable information to adapt to the high resolution of meso-scale meteorological model. Therefore, it provides the necessary technical support for the development of the distributed power generation.

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Research on capacity configuration method of concentrated reactive power compensator for wind farm LVRT capability

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The Journal of Engineering 2017年第13期2017卷 2428-2432页

作者： Jing He Qing Li Jing Ma Weibo Zhang Yu Zhao State Key Laboratory of Operation and Control of Renewable Energy & Storage Systems China Electric Power Research Institute Beijing People's Republic of China State Key Laboratory of Alternate Electrical Power System with Renewable Energy Sources North China Electric Power University Beijing People's Republic of China

In order to fulfil the requirement for low-voltage ride-through (LVRT) capability, the wind farms need to inject the reactive currents during grid fault to support voltage recovery. As the main concentrated reactive power compensator, the static var generators (SVGs) are widely employed in the wind farm for reactive current injection. This study investigates the dynamic reactive currents of the wind turbine based on the field-test data during the grid faults. Then, the scheme that taking wind turbines as main reactive current sources and SVG as compensator is adopted to realise the wind farm LVRT capability. According to this scheme, the capacity configuration method of SVG is developed, which can be used to design SVG capacity to improve the wind farm dynamic reactive current behaviour. Finally, the simulation results are provided to demonstrate the effectiveness and the availability of the proposed method.

关键词： static VAr compensators power system faults power system stability wind power plants power grids wind turbines reactive power control reactive power main concentrated reactive power compensator reactive current injection dynamic reactive currents wind turbine grid fault main reactive current sources wind farm LVRT capability capacity configuration method SVG capacity wind farm dynamic reactive current behaviour low-voltage ride-through capability voltage recovery

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A Short-term Wind Power Prediction Approach Based On the Dynamic Classification of the Weather Types of Wind Farms

A Short-term Wind Power Prediction Approach Based On the Dyn...

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2017 International Electrical and energy Conference (CIEEC 2017)

作者： Xiaosheng Peng Wenhan Fan Fan Yang Jianfeng Che Bo Wang School of Electrical and Electronic Engineering Huazhong University of Science and Technology State Key Laboratory of Operation and Control of Renewable Energy & Storage Systems China Electric Power Research Institute

Wind Power Prediction（WPP） is an effective way to reduce the uncertainty and randomness of large volume of wind power,and to improve the wind power integration capacity of power ***,WPP based on the classification of weather types is one of the most popular methods to improve the WPP accuracy,but most of the research focused on the static classification of the weather types,and the dynamic classification of weather types is not *** Weather Prediction（NWP） data of a certain time is applied for the static classification of weather type,which is not effective for describing the dynamic changing process of the weather of wind *** overcome the challenge,a short-term WPP approach based on the dynamic classification of the weather types,dividing the weather types into stable type,trending type and fluctuating type,on the basis of wind speed change in a period of time,is presented in the *** dynamic classification of the weather types based WPP is with significant advantage to describe the wind power characteristics of different weather types,which is an effective method to improve the short-term WPP accuracy,and is recommended for the industrial applications.

关键词： Wind Power Prediction Classification of Weather Types Back Propagation Neural Network ARMA Model Hybrid Model

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Wind farm HVRT capability improvement based on coordinated reactive power control strategy

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The Journal of Engineering 2017年第13期2017卷 756-761页

作者： Yuandong Zhang Qing Li Jinping Zhang Shiyao Qin State Key Laboratory of Operation and Control of Renewable Energy & Storage Systems People's Republic of China CEPRI Inspection and Certification (Beijing) Co. Ltd People's Republic of China Renewable Energy Center Electric Power Research Institute People's Republic of China

Voltage swells after grid fault clearance is one of the major causes of large-scale wind power tripping accidents in China. In this study, reasons that led to overvoltage phenomena were researched, and factors that influence the grid overvoltage during grid fault were quantitatively analysed through simulation. A coordinated reactive power control strategy combined the control of wind turbines with reactive power compensation devices was proposed to prevent the occurrence of high voltage and improve the high-voltage ride through capability of wind power plant. Finally, the effectiveness of the proposed control strategy was indicated by the simulation results in DIgSILENT/PowerFactory.

关键词： wind power plants reactive power control power generation control accidents power generation faults power generation reliability DIgSILENT-PowerFactory wind power plant high-voltage ride through capability reactive power compensation devices wind turbine control grid fault grid overvoltage overvoltage phenomena China large-scale wind power tripping accidents grid fault clearance voltage swells coordinated reactive power control strategy wind farm HVRT capability improvement

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Research on optimal configuration strategy of energy storage capacity in gridconnected microgrid

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Protection and control of Modern Power systems 2017年第1期2卷 389-395页

作者： Jianlin Li Yushi Xue Liting Tian Xiaodong Yuan State Key Laboratory of Operation and Control of Renewable Energy&Storage Systems China Electric Power Research InstituteBeijing 100192China. SGCC Jiangsu Electric Power Research Institute Nanjing 211103China.

The optimal configuration of battery energy storage system is key to the designing of a *** this paper,a optimal configuration method of energy storage in grid-connected microgrid is ***,the two-layer decision model to allocate the capacity of storage is *** decision variables in outer programming model are the capacity and power of the storage *** objective is the least investment on the battery energy storage *** decision variable in inner programming model is the charging and discharging power of *** objective is the lowest power fluctuation on the connection *** a case containing a grid-connected microgrid with wind power,photovoltaic,battery energy storage and load is studied,and the multi-scenario probabilistic method is *** last result of energy storage configuration is calculated through the probability of each scene.

关键词： energy storage Optimal configuration Dynamic programming Two-layer decision Scene analysis

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