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IEEE PES Asia-Pacific Power and energy Engineering Conference (APPEEC)

作者： Yanzheng Wu Junpeng Zhu Yue Yuan Da Cheng State Key Laboratory of Operation and Control of Renewable Energy and Storage Systems China Electric Power Research Institute Beijing China College of Energy and Electrical Engineering Hohai University Nanjing China China electric power research institute Beijing China Hunan University College of Electrical and Information Engineering Hunan China

ISBN: (数字)9781728157481

ISBN: (纸本)9781728157498

The concept of cloud energy storage provides a new idea and platform for the scale application of consumer-side energy storage. To further study the role of cloud energy storage in business, we improve the optimization clearing model of cloud energy storage on the basis of benefit analysis. In this paper, a distributed Nash bargaining method is used to share the profits obtained from their cooperation, and we explain it through model derivation. Finally, an example is given to verify the effectiveness of this method.

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General modelling method for impedance of voltage source converter

General modelling method for impedance of voltage source con...

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8th renewable Power Generation Conference (RPG 2019)

作者： Zhibing Wang Hongzhi Liu Qing Li Weishen Wang State Key Laboratory of Operation and Control of Renewable Energy & Storage Systems China Electric Power Research Institute. Beijing 100192 China

ISBN: (数字)9781839531248

ISBN: (纸本)9781839531255

Voltage source converters (VSC) have been widely used in renewable energy generation, flexible ac/dc transmission and energy transfer devices, which result in a lot of system transient stability problems, but essential cause and the physical significance are not yet systematically analysed. Firstly the paper researches the working principle and stable mode of typical voltage source converters, when considering control strategy, circuit parameters and other influencing factors, and then, the general mathematical model of AC side and DC side impedance of voltage source converters is established with internal dynamic process based on the stationary reference frame. On this basis, all of states are studied on the influence of output impedance amplitude of VSC for the operation characteristics, the influence domain characteristics of impedance for the operation stability of converter, and the key components or parameters that affect the output impedance amplitude. In the meanwhile, the frequency-domain analysis is developed to verify the correctness of above results.

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Research on parameter testing method of centralized reactive power compensation device for photovoltaic power station

Research on parameter testing method of centralized reactive...

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8th renewable Power Generation Conference (RPG 2019)

作者： Xiaolin Zhang Guangxiu Yao Xiaodi Qin Wei Dong Yinghua Dong State Key Laboratory of Operation and Control of Renewable Energy & Storage Systems China Electric Power Research Institute. Beijing 100192 China

ISBN: (数字)9781839531248

ISBN: (纸本)9781839531255

The centralized reactive power compensation devices used in photovoltaic power plants have high voltage level and far exceed the capacity of test devices, laboratory/field test conditions can not meet all typical working conditions, and can not obtain model parameters through test data. Therefore, this paper presents a parameter test method for centralized reactive power compensation device based on Hardware-in-the-loop simulation. Firstly, a detailed topological model and a test device model of the centralized reactive power compensation device are established, connecting model with controller of centralized reactive power compensation device through optical and electrical physical interface, the hardware-in-the-loop simulation test platform of centralized reactive power compensation device is established. Then, for all typical operating conditions, a centralized reactive power compensation device model parameter testing method is proposed. Finally, based on the hardware-in-the-loop simulation test platform, the parameters of a certain type of SVG are tested. The test results show that the proposed method is effective.

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Design of demonstration platform for PV DC-DC converter in DC distribution network

Design of demonstration platform for PV DC-DC converter in D...

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8th renewable Power Generation Conference (RPG 2019)

作者： Dong Wei Yao Guangxiu Zhang Junjun Liu Meiyin State Key Laboratory of Operation and Control of Renewable Energy & Storage Systems China Electric Power Research Institute. Beijing 100192 China

ISBN: (数字)9781839531248

ISBN: (纸本)9781839531255

Due to less transformation links, stronger transmission capacity and less line loss, DC transmission is an important way for large-scale photovoltaic (PV) sources accommodation in distributed network. Meanwhile there are a high ratio of power electronic devices with bulk capacitor, which is prone to loses stability due to the rapid rise of current and the fast protection of equipment when the fault occurs. The power quality, power control capability and transient response of PV DC-DC Converter are not clear. Therefore, in order to truly reflect the long-term performance of DC converters, it is urgent to establish an DC network demonstration platform. In this paper, the structure for multi-scenario DC distribution network, DC circuit breaker and various power grid faults and working conditions are introduced. Meanwhile, the design of a multi-point synchronize measure and data acquisition system is given, which can record the dynamic processes of network under complex parallel operation of PV DC-DC converters.

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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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P2-type Na_(0.6)[Mg(Ⅱ)_(0.3)Mn(Ⅳ)_(0.7)]O_2 as a new model material for anionic redox reaction

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Chinese Chemical Letters 2018年第12期29卷 1791-1794页

作者： Xiaohui Rong Fei Gao Yaxiang Lu Kai Yang Yongsheng Hu State Key Laboratory of Operation and Control of Renewable Energy and Storage Systems China Electric Power Research Institute Key Laboratory for Renewable Energy Beijing Key Laboratory for New Energy Materials and Devices Beijing National Laboratory for Condensed Matter Physics Institute of Physics Chinese Academy of Sciences Center of Materials Science and Optoelectronics Engineering University of Chinese Academy of Sciences

A new model material of Na[Mg(Ⅱ)Mn(Ⅳ)]O, with only Mgand Mnin the transition metal layers, is synthesized for the research of anionic redox reaction. The material delivers a capacity of ～130 mAh/g with a long plateau at ～4.2 V in the initial charge profile, indicating anionic redox reaction(ARR) involved during the initial desodiation process. In the following cycles, the reversible capacity can reach a high value of ～210 mAh/g, which is probably derived from the participation of both ARR and Mn/Mnredox couples, further proving the charge compensation from ARR during the initial charge and following cycles. The designed cathode material without Mnhelps avoid the influence of oxygen activity from transition metals, enabling the investigation of ARR without other distractions.

关键词： Na-ion batteries Layered oxide Cathode Anionic redox reaction Na_(0.6)[Mg_(0.3)Mn_(0.7)]O_2

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Power control performance evaluation of wind turbine based on a hardware-in-the-loop simulation platform

Power control performance evaluation of wind turbine based o...

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8th renewable Power Generation Conference (RPG 2019)

作者： Fenglin Miao Qing Li Jing He Jinping Zhang State Key Laboratory of Operation and Control of Renewable Energy & Storage Systems (China Electric Power Research Institute) Beijing P.R. China

ISBN: (数字)9781839531248

ISBN: (纸本)9781839531255

Power control performance evaluation of wind turbine can offer an important guarantee for reliable operation of power grid. Modelling is a general method to study the power control strategy. However, the power control performance of wind turbine is evaluated based on field test at present, because accurate results of power control test are not easy to be obtained by simulation. Combined simulation method in off-line simulation has been used with the consideration of coupling effect of electrical and mechanical components, but the dynamical behaviour in a long period of time cannot be investigated because of the low efficiency of solver. In the electromagnetic transient research of power electronics, real-time simulation is suggested with high efficiency. In this paper, a hardware-in-the-loop (HIL) simulation method for the power-control capability evaluation of wind turbine is proposed. Physical controllers in the HIL include main controller and converter controller. Multi-time step of detailed model simulation was realized by different types of interface based on real-time simulators. Additionally, an experiment on power control of wind turbine was carried out. It is a convenient and time-saving way to evaluate the power control performance of wind turbine in the HIL simulation platform.

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Study on the impact of communication network on reactive power control in wind farm

Study on the impact of communication network on reactive pow...

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8th renewable Power Generation Conference (RPG 2019)

作者： Chunyan Li Qing Li Jinping Zhang Fenglin Miao State Key Laboratory of Operation and Control of Renewable Energy & Storage Systems (China Electric Power Research Institute) Beijing P.R. China

ISBN: (数字)9781839531248

ISBN: (纸本)9781839531255

The performance of reactive power control system seriously affect the normal operation of wind farm. However, typical system architecture of reactive power control system usually contains several hierarchies and the communication network of the whole system is very complicated. So, the assessment of reactive power control system should take the communication network between these hierarchies in consideration inevitably. In this paper, instead of using a time delay to simulate the data transportation delay, a new method to model the network topology and data link layer is proposed. With this method, the communication network model, the reactive power control strategy as well as the wind farm model are all established in the same MATLAB/Simulink environment. Then the communication network performance such as end to end delay, node workload, communication protocol etc. can be evaluated and the influence of communication network to the reactive power control system can be analysed in one environment. In final, the effectiveness of this modelling method is validated by model simulation of the reactive power control system integrated with communication network.

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Data-driven Model-free Adaptive control of High Power Converters in Super-large-scale energy storage Station

Data-driven Model-free Adaptive Control of High Power Conver...

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第三十八届中国控制会议

作者： Xiangjun Li Xuecui Jia Shijie Yan Shangxing Wang State Key Laboratory of Control and Operation of Renewable Energy and Storage Systems China Electric Power Research Institute College of Information and Engineering Northeastern University

A data-driven control method is proposed in super-large-scale energy storage station. This control strategy is embedded in power converter and can solve the serious parallel control problems, that is, the output voltage amplitude, phase angle and frequency may be different due to their model mismatch and unknown dynamics, when high power converters are connected in parallel. Based on the model free adaptive control algorithm, the data-driven controller is designed in high power converter system. The parallel power converter system is dynamically linearized by introducing the pseudo partial derivative. In order to keep that output voltage amplitude, frequency and phase of each power converters are equal at the point of common connection in super-large-scale energy storage station, the control parameters of power converter are updated through the input and output data acquired in real time, when the parallel power converters is running. The simulation results show that the model free adaptive algorithm of power converter is effective in super-large-scale energy storage station.

关键词： Super-large-scale energy storage Station High Power Converter Droop control Pseudo Partial Derivative Model Free Adaptive control

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An Improved Shrunken Primal-Dual Subgradient (i-SPDS) algorithm for Optimization in Large-Scale Networked Environment

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IOP Conference Series: Earth and Environmental Science 2021年第1期661卷

作者： Kui Luo Qinghua Wang State Key Laboratory of Operation and Control of Renewable Energy & Storage System China Electric Power Research Institute Beijing 100192 China State Key Laboratory of Alternate Electrical Power System with Renewable Energy Sources North China Electric Power University Beijing 102206 China

Large-scale optimization in networked environment is challenged by scalability. To address this challenge, this paper sets its aim on developing algorithms for optimization problems with strongly coupled objective function and global constraints. As a radical improvement of the state-of-the-art algorithms, this paper develops an improved shrunken-primal-dual subgradient (i-SPDS) algorithm that establishes fast convergence and eliminates optimality gap. The developed algorithm is rather generic in that it can be readily implemented in any applications that involve large-scale networked environment. Simulations are conducted to demonstrate the efficacy and efficiency of the proposed i-SPDS.

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