Rapid development of renewable energy in China is driving a major shift in the characteristics and control requirements of the electricity grid.Since the best renewable energy resources are far away from load centers ...Rapid development of renewable energy in China is driving a major shift in the characteristics and control requirements of the electricity grid.Since the best renewable energy resources are far away from load centers in the east and southeast,transmission over long distances is required.Over 20 high-voltage DC(HVDC)transmission lines,with a combined capacity exceeding 150 GW,are in operation or are currently under construction.This rapid expansion of new generation and transmission capacities based on power electronics starts to change the characteristics of the grid,especially in areas where they concentrate,creating new stability problems and operational challenges.New system theories and technologies are required to support the development and operation of a future grid that relies more and more on power electronics.This paper highlights the characteristics of power electronics as used in renewable energy generation and HVDC transmission systems,discusses the impacts of these power-electronics-based assets on grid stability and operational requirements,and identifies opportunities for the development of both new system theories and system technologies to support a national energy policy that emphasizes the use of clean energy.展开更多
综合电力系统(Integrated Power System,IPS)作为未来舰船发展的重要组成部分,代表着先进的集成优化电力系统发展方向。为深入研究IPS中配电网保护策略,叙述了近年来IPS国内外发展情况,较全面的分析了IPS中配电网络的特点,结合几种常用...综合电力系统(Integrated Power System,IPS)作为未来舰船发展的重要组成部分,代表着先进的集成优化电力系统发展方向。为深入研究IPS中配电网保护策略,叙述了近年来IPS国内外发展情况,较全面的分析了IPS中配电网络的特点,结合几种常用母线继电保护措施在IPS中的应用情况,指出了保护实现的难点和关键;综述了IPS交流网络中单相接地故障的探测与诊断方法和陆地中性点不接地系统中单相接地故障的研究方法。最后,指出IPS配电网络的未来发展方向,讨论了IPS中压直流配电网的相应保护策略发展的方向。展开更多
基金supported in part by the State Grid Science and Technology Project“Impedance-Based Modeling and Control of Distributed Generation Systems”(NYB1720170218).
文摘Rapid development of renewable energy in China is driving a major shift in the characteristics and control requirements of the electricity grid.Since the best renewable energy resources are far away from load centers in the east and southeast,transmission over long distances is required.Over 20 high-voltage DC(HVDC)transmission lines,with a combined capacity exceeding 150 GW,are in operation or are currently under construction.This rapid expansion of new generation and transmission capacities based on power electronics starts to change the characteristics of the grid,especially in areas where they concentrate,creating new stability problems and operational challenges.New system theories and technologies are required to support the development and operation of a future grid that relies more and more on power electronics.This paper highlights the characteristics of power electronics as used in renewable energy generation and HVDC transmission systems,discusses the impacts of these power-electronics-based assets on grid stability and operational requirements,and identifies opportunities for the development of both new system theories and system technologies to support a national energy policy that emphasizes the use of clean energy.
文摘综合电力系统(Integrated Power System,IPS)作为未来舰船发展的重要组成部分,代表着先进的集成优化电力系统发展方向。为深入研究IPS中配电网保护策略,叙述了近年来IPS国内外发展情况,较全面的分析了IPS中配电网络的特点,结合几种常用母线继电保护措施在IPS中的应用情况,指出了保护实现的难点和关键;综述了IPS交流网络中单相接地故障的探测与诊断方法和陆地中性点不接地系统中单相接地故障的研究方法。最后,指出IPS配电网络的未来发展方向,讨论了IPS中压直流配电网的相应保护策略发展的方向。
