摘要
为了使输入并联输出串联电源系统同时具备模块级和系统级冗余能力,提出低冗余高可靠超宽电压范围电路结构及其控制方法。基于两级式电路和多模块串并联实现电源系统超宽电压输出,通过模块级部分子电路冗余设计,实现模块级和系统级N+X双重冗余,使得功率模块部分失效或多个模块全部失效时系统仍具有全电压、全功率输出能力。进一步提出模块化电源系统的分布-集中混合式控制策略,分布式自主控制保证了模块间应力均衡、并使得输出电压在目标值范围内,集中控制确保总输出电压精度。该文详细分析所提电路结构及其控制策略的原理、特性和实现方案,并通过0~1000 V/50 kW输出电源系统实验,验证了所提方案的有效性。
The use of modular series-parallel systems is widespread across numerous fields owing to their capacity to scale up voltage,current,and power output in power systems.Redundancy is an effective method to improve the reliability of IPOS power systems,which are widely used in high-output voltage situations.However,traditional redundancy strategies result in a substantial increase in both cost and volume due to the doubling of power units.This paper proposes a circuit design with low redundancy,high reliability,and ultra-wide voltage range,which empowers IPOS power systems with module-level and system-level redundancy capabilities.Module-level redundancy and system-level N+X redundancy have been achieved through sub-circuit redundancy design at the module level.The full bridge LLC is decomposed into a dual half bridge structure with an input parallel on the primary side of the circuit.The basic unit of the system is established using the half-bridge circuit,and only an additional half-bridge resonant circuit unit is required to achieve redundant backup of the primary side full bridge switching network.This approach effectively reduces redundant units while providing module-level redundant power supply capability.The IPOS system is equipped with multiple power modules,and the redundant circuit units of other modules can replace any malfunctioning power module,providing system-level redundancy capability.As a result,there is no need to set up redundant power modules at the system level,and the power system maintains full voltage range and output power capability even in case of any power module failure.Furthermore,the modulation strategy using carrier stacking technology has been designed to facilitate the rapid and convenient output of redundant units during fault conditions while ensuring the efficient operation of modules.A novel distributed-centralized hybrid control strategy for modular power supply systems is proposed.The proposed strategy leverages distributed autonomous and centralized control mechanisms to pre
作者
宋猛
吴红飞
吴嘉昊
贾益行
徐鑫雨
Song Meng;Wu Hongfei;Wu Jiahao;Jia Yihang;Xu Xinyu(Center for More-Electric-Aircraft Power System Nanjing University of Aeronautics and Astronautics,Nanjing 211106 China)
出处
《电工技术学报》
EI
CSCD
北大核心
2024年第6期1898-1906,共9页
Transactions of China Electrotechnical Society
基金
国家自然科学基金(52122708)
江苏省自然科学基金(BK20200017)资助项目。
关键词
低冗余
高可靠
输入并联输出串联
下垂控制
Low redundancy
high reliability
input-parallel output-series
droop-control
