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2011 International Conference on Advanced Power System Automation and Protection(APAP 2011)

作者： LI Bin 1 , WU HongLin 1 , GAO XiaoQi 2 1 Key Laboratory of Smart Grid of Ministry of Education, Tianjin University, Tianjin 300072, China 2 Longyuan (Beijing) Solar Engineering Technology Co., Ltd., Beijing 100034, China

As a clean and renewable source of energy and can be used easily and widely in the future, photovoltaic is one of the most important distributed generations in micro-grid. The deployment of high penetration rooftop photovoltaic （PV） system is becoming a reality in micro-grid. Developing high penetration rooftop PV system in an effective manner is a great challenge. The paper analyzes the characteristics of high penetration rooftop PV system and proposes protection schemes according to the requirements. As the operation of micro-grid is flexible, micro-grid could operate not only in radial or open loop configurations, but also in closed loop configurations according to the security and the reliability requirements. This paper investigates the protection requirements of high penetration rooftop PV system and analyzes the characteristics of conventional protection schemes applied to high penetration rooftop PV system. Obviously, the pilot protection can fulfill the requirements of high penetration rooftop PV system. Taking the fault clearance speeds and the requirement of directional element into account, the paper proposes protection scheme based on overcurrent coordination for high penetration rooftop PV system. The proposed protection schemes show that it can clear the fault instantaneously and significantly improve the reliability and security of high penetration PV system.

关键词： protection scheme high penetration rooftop photovoltaic system micro-grid wireless communication

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Integrating high levels of variable renewable energy into electric power systems

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Journal of Modern Power Systems and Clean Energy 2017年第6期5卷 831-837页

作者： Benjamin KROPOSKI National Renewable Energy Laboratory GoldenCO 80401USA

As more variable renewable energy(VRE)such as wind and solar are integrated into electric power systems,technical challenges arise from the need to maintain the balance between load and generation at all *** paper examines the challenges with integrating ultrahigh levels of VRE into electric power system,reviews a range of solutions to these challenges,and provides a description of several examples of ultra-high VRE systems that are in operation today.

关键词： high penetration Variable renewable energy Grid operation Wind Solar

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