摘要
【目的】基于模块化多电平技术的大容量电压源型逆变器(static var generator,SVG),可实现主动构网、无功补偿、谐波抑制、阻抗重塑等多种功能,是支撑新型电力系统构建的重要设备。【方法】对大容量电压源型逆变器在新型电力系统构建中的关键技术进行了论述。首先,回顾了SVG的发展历程和基本拓扑原理,梳理了SVG与模块化多电平换流器(modular multilevel converter,MMC)演化转换关系,分析了SVG支撑电网强度的量化评估公式,总结了SVG保障新型电力系统在高比例新能源、高比例电力电子设备接入下安全稳定运行的优势。然后,重点对基于SVG的多源换相换流器(multisource line commutation converter,SLCC)技术、有源滤波器、构网型SVG、储能型SVG等关键技术进行了分析。最后,对SVG在未来新型电力系统中可发挥的关键作用和后续重点研究方向进行了展望。【结果】在未来新型电力系统构建中,大容量SVG在大规模新能源孤岛送出、弱系统电压支撑、广域谐波抑制等方面应用前景广阔。【结论】孤岛新能源下SVG预充电和黑启动、多SVG间协调配合控制等方面有待开展进一步深入研究。
[Objective]The large-capacity static var generator(SVG)based on modular multilevel technology can be used to realize various functions such as active network construction,reactive power compensation,harmonic suppression,and impedance remodeling,and is an important equipment to support the construction of new power systems.[Methods]This study discusses the key technologies and innovation prospects of large-capacity voltage-sourced inverters in the construction of new power systems,reviews the development history and basic topological principles of SVG,determines the evolutionary conversion relationship between SVG and modular multilevel converters,analyzes the quantitative evaluation formula of AC grid strength supported by SVG,and summarizes the advantages of SVG in ensuring the safe and stable operation of the new power system with a high proportion of new energy and power electronic equipment.Then,key technologies such as SVGbased multisource line commutation converter(SLCC)technology,active filter,grid-forming SVG,and energy storage-type SVG were analyzed.Finally,the key role that SVG plays in the construction of new power systems and the key research directions were discussed.[Results]In the construction of new power systems,large-capacity SVGs have broad application prospects in areas such as large-scale new energy island exports,weak-system voltage support,and wide-area harmonic suppression.[Conclusions]Further in-depth research is needed on SVG precharging and black start,as well as on coordinated control among multiple SVGs in isolated new energy systems.
作者
马为民
李明
薛英林
王莹鑫
吴方劼
赵峥
李探
MA Weimin;LI Ming;XUE Yinglin;WANG Yingxin;WU Fangjie;ZHAO Zheng;LI Tan(State Grid Economic and Technological Research Institute Co.,Ltd.,Beijing 102209,China)
出处
《电力建设》
北大核心
2025年第10期1-11,共11页
Electric Power Construction
基金
国家电网公司科技项目(5100-202356816A-3-8-KJ)。
