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检索条件"机构=State Key Laboratory of Operation and Control of Renewable Energy& Storage Systems"

共 607 条记录，以下是241-250 订阅

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Optimal operation of Flexible Interconnected Distribution Networks

Optimal Operation of Flexible Interconnected Distribution Ne...

引用

Advanced Electrical Equipment and Reliable operation (AEERO), International Conference on

作者： Qi Qi Hongbin Xie Buyang Qi Yanping Xu Pai Li State Key Laboratory of Operation and Control of Renewable Energy & Storage Systems China Electric Power Research Institute Beijng China School of Electrical and Electronic Engineering North China Electric Power University Beijng China Tsinghua University Beijing China

ISBN: (纸本)9781665402651

With large-scale distributed generation (DG) being integrated into distribution networks, the idea of using power electronic devices to improve distribution network operation have attracted increasing attentions. The transition of distribution networks into flexible interconnected ones, which contain considerable penetrations of AC/DC converters and soft open points (SOPs) is foreseen. In this paper, an optimization framework to improve the operation of the new form of distribution networks is proposed, where a novel searching technique is developed to determine the optimal set-points of the power electronic devices with increased efficiency. A generic power flow algorithm considering different modes of the controllable devices is presented, where the power flow problem is formulated into a set of nonlinear equations, and a globally convergent Newton-trust region method is adopted to solve it. Results of the case study demonstrate the feasibility and efficiency of the proposed method.

关键词： AC-DC power converters Nonlinear equations Distribution networks Voltage Power electronics Topology Steady-state

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Study on control Technologies Scheme of Wind Farm Transient Active Support

Study on Control Technologies Scheme of Wind Farm Transient ...

引用

Sustainable Power and energy Conference (iSPEC)

作者： Yan Li Xinshou Tian Yongning Chi Chao Liu Xiaojie Fan Yiwen Fan Jianzu Hu Yu Xiao Cong Wang China Electric Power Research Institute China State Key Laboratory of Operation and Control of Renewable Energy & Storage Systems Beijing China

ISBN: (数字)9781728191645

ISBN: (纸本)9781728191652

Due to the fault ride-through control strategy, voltage withstand capability, and reactive power / voltage control strategy of wind turbines, the DC transmission capability is greatly restricted, and the transient characteristics of wind turbines and dynamic reactive power compensation devices are mutually coupled, which makes the reactive voltage control characteristics of DC near zone more complicated. In order to effectively solve the problem of transient active support for large-scale wind power grid connection, it is urgent to carry out research on the voltage and power active support technology for the transient process of wind turbines, master the key technologies of active support control for the transient process of wind power and promote the active support of transient wind power. This study may provide a good reference to obtain advances in power grid technology, ensure the safe and stable operation of large-scale wind power grid-connected systems, improve the grid's ability to accommodate wind power, increase the international core competitiveness of key wind power technologies, and promote the scale and sustainable development of wind power industry in China.

关键词： Process control Wind power generation Wind farms Power grids Wind turbines Transient analysis Voltage control

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Study on thermal effect of LiFePO4/C battery with different capacity retention rate in adiabatic environment 2

Study on thermal effect of LiFePO4/C battery with different ...

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2nd International Conference on Artificial Intelligence and Advanced Manufacture, AIAM 2020

作者： Gao, Fei Hui, Dong Yang, Kai Zhao, Fenggang Yang, Longfei Yu, Honggang Wang, Shuping Fan, Minghao China Electric Power Research Institute State Key Laboratory of Operation and Control of Renewable Energy Storage Systems Beijing100192 China Contemporary Amperex Technology Co.Ltd Ningde352100 China State Grid Anhui Electric Power CO. LTD Hefei230000 China

ISBN: (纸本)9781728199863

The life of the new LiFePO4/C battery with prelithiation technology has been greatly improved. In the life-cycle management of this kind of long-life lithium ion battery, attention should be paid to the change of battery resistance and the change of thermal effect during charge/discharge process, so as to accurately evaluate its health state and adjust its thermal management strategy. In this paper, battery samples with prelithiation technology under different capacity retention rates (100%, 91.72%, 75.57% and 67.78/%) were studied. By comparing with conventional batteries with same capacity, the change of internal resistance (total resistance, ohmic resistance, polarization resistance) and the discharge thermal effect of batteries with different capacity retention rates in adiabatic environment were analysed. © 2020 IEEE.

关键词： Iron compounds

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Research on Reactive Power Planning Technology of Power Grid Containing UHVDC System with High Proportion of renewable energy Integration

Research on Reactive Power Planning Technology of Power Grid...

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International Conference on High Voltage Engineering and Application, ICHVE

作者： Li Yan Tian Xinshou Hu Jianzu Liu Chao China Electric Power Research Institute China State Key Laboratory of Operation and Control of Renewable Energy & Storage Systems Beijing China

ISBN: (数字)9781728155111

ISBN: (纸本)9781728155128

In large-scale renewable energy bases, thousands of renewable energy power generation units are often installed, but wind power is different from the reactive characteristics of traditional thermal power plants, the renewable energy power plant is essentially a weak grid with strong voltage sensitivity. Weak-end power grids have weak voltage support capabilities and prominent reactive power problems. Under the operating conditions of large-scale renewable energy generation, heavy line load and other operating conditions, the randomness and fluctuation of renewable energy generation will lead to the voltage of the local power grid in the connected area. Large fluctuations can easily induce serious system security and stability accidents. The occurrence of multiple large-scale wind power off-grid accidents has highlighted the problem of system reactive voltage stability caused by large-scale renewable energy grid connection. The existing reactive voltage control method based on a single renewable energy power plant has been unable to meet the needs of large-scale renewable energy development, and it is urgent to study the renewable energy power generation unit in a large renewable energy power plant that takes into account the voltage distribution and rapid change of active power in the field, and centralized reactive power compensation equipment reactive voltage control mode. The impact of large-scale renewable energy centralized connect to the reactive voltage stability of the power grid is not only a local issue but has become a global issue. It is necessary to carry out research on reactive power allocation of power systems that takes into account the large-scale renewable energy grid connection. By coordinating the reactive power control of large-scale renewable energy bases and the main grid, the voltage stability level of the entire system is improved to prevent large-scale wind power off-grid accidents.

关键词： renewable energy sources Reactive power Voltage control Wind power generation Power grids Power system stability Wind farms

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Research on parameter testing method of centralized reactive power compensation device for photovoltaic power station 8

Research on parameter testing method of centralized reactive...

引用

8th renewable Power Generation Conference, RPG 2019

作者： Zhang, Xiaolin Yao, Guangxiu Qin, Xiaodi Dong, Wei Dong, Yinghua State Key Laboratory of Operation and Control of Renewable Energy Storage Systems China Electric Power Research Institute Beijing100192 China

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. © 2019 Institution of Engineering and Technology. All rights reserved.

关键词： Hardware-in-the-loop simulation

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Overcharge experiment analysis of the LiFePO4/C battery with prelithiation technology

Overcharge experiment analysis of the LiFePO4/C battery with...

引用

2020 International Conference on New energy and Sustainable Development, NESD 2020

作者： Gao, Fei Hui, Dong Yang, Kai Zhao, Fenggang Yang, Longfei Wang, Guobao Wang, Shuping Fan, Minghao State Key Laboratory of Operation and Control of Renewable Energy and Storage Systems China Electric Power Research Institute Beijing100192 China Contemporary Amperex Technology Co. Ltd Ningde352100 China State Grid Anhui Electric Power CO. LTD Hefei230000 China

Prelithiation technology can improve the service life of batteries, but whether it will affect the safety of batteries has not been studied. In this paper, the temperature differences between LiFePO4/C batteries with prelithiation technology and conventional LiFePO4/C batteries in overcharge test are analysed, the shell deformation values of these two types of batteries are compared, and the influence of battery capacity retention rate on overcharge safety of batteries is discussed. The analysis shows that there is no obvious difference in overcharge safety between two types of batteries, and batteries with prelithiation technology are similar to conventional batteries in terms of shell deformation value, the highest temperature of shell and the temperature fluctuation of flue gas escaping from pressure relief valve. © Published under licence by IOP Publishing Ltd.

关键词： Lithium compounds

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Design of demonstration platform for PV DC-DC converter in DC distribution network 8

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

引用

8th renewable Power Generation Conference, RPG 2019

作者： Wei, Dong Guangxiu, Yao Junjun, Zhang Meiyin, Liu State Key Laboratory of Operation and Control of Renewable Energy Storage Systems China Electric Power Research Institute Beijing100192 China

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 multiscenario 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. © 2019 Institution of Engineering and Technology. All rights reserved.

关键词： DC-DC converters

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Model of long-term yield evaluation for PV station 8

Model of long-term yield evaluation for PV station

引用

8th renewable Power Generation Conference, RPG 2019

作者： Dong, Yinghua Li, Hongtao Zhang, Junjun Wu, Fubao Ding, Mingchang State Key Laboratory of Operation and Control of Renewable Energy and Storage Systems China Electric Power Research Institute Beijing100192 China

ISBN: (纸本)9781839531255

In this paper, a model of long-term yield evaluation for PV station is established. The efficiency of key components for PV station is analyzed. Meanwhile, the factors which affecting the efficiency of PV station yield are also analyzed. Based on these, the model of PV station yield is established. Based on this model, the long-term yield of PV station can be evaluated. © 2019 Institution of Engineering and Technology. All rights reserved.

关键词： Efficiency

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The Characteristics and Challenge on Large-Scale renewable energy Grid Integration

The Characteristics and Challenge on Large-Scale Renewable E...

引用

2019 IEEE PES Innovative Smart Grid Technologies Asia, ISGT 2019

作者： Yongning, Chi Yan, Li Zhen, Wang Zhen, Li Hongzhi, Liu Zhankui, Zhang China State Key Laboratory of Operation and Control of Renewable Energy and Storage Systems China Electric Power Research Institute Beijing China

ISBN: (纸本)9781728135205

In some regions, for example in Northwest and Northeast China, Northern Germany, Denmark, Spain, Portugal, Ireland or Texas, RE generation supplies a significant amount of the total energy demand. In the future, more and more countries are likely to experience similar situation as RE generation is increasingly considered not only as a means to reduce CO2 emissions, but also as an interesting economic alternative in areas with appropriate RE resources. However, RE generation delivers a variable level of power depending on the wind speed, and is not dispatchable in the same way as conventional energy sources due to the special characteristics. The integration of high penetration level of RE generation in some regions has brought much challenge on maintaining power system reliability and the balance between load and generation. Since the power system were originally designed around large-scale synchronous generators, new approaches and solutions are required when RE generation is integrated into power system with high penetration. This paper provides an introduction about the special characteristics of RE generation, and tries to explore potential challenge caused by the integration of RE generation into power systems. In addition, this chapter will focus on wind and solar power considering their high share in RE generation. © 2019 IEEE.

关键词： Solar energy

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Bus-bar splitting on enhancing static voltage stability for the base and contingency cases 4

Bus-bar splitting on enhancing static voltage stability for ...

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4th IEEE Conference on energy Internet and energy System Integration, EI2 2020

作者： Wang, Lei Chiang, Hsiao-Dong Lou, Wenjing Shandong University of Technology School of Electrical and Electronic Engineering Zibo China Cornell University School of Electrical and Computer Engineering IthacaNY United States China Electric Power Research Insitute State Key Laboratory of Operation and Control of Renewable Energy Storage Systems Beijing China

ISBN: (纸本)9781728196060

To enhance the voltage stability of power system, the bus-bar splitting is employed on the look-ahead base case with a credible set of disturbances. The purpose of this paper is identify a 'best' bus-bar splitting scheme for a look-ahead power system that can enhance the load margin of the look-ahead power system and ensure the load margins of contingency cases are great than a threshold preset by operators. Considering the complexity of online solution of the proposed problem, the group property of contingencies and a four-stage methodology are proposed in this paper. Results of the IEEE 118 bus-power system indicate the effectiveness of bus splitting and the four-stage methodology. © 2020 IEEE.

关键词： Voltage control

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