电工技术学报2018，Vol.33Issue(6)：1219-1226,8.DOI:10.19595/j.cnki.1000-6753.tces.161255
基于子模组工况分析的模块化多电平储能系统开路故障诊断方法
Modular Multilevel Energy Stroage System Open Circuit Diagnostic Method Based on Sub-Module Operation Analysis
摘要
Abstract
These curity and reliability of DC converter in energy storage system are directly related to the normal operation of the system. By the analysis on fault operation conditions of half bridge sub-module in modular multilevel DC-DC converter (MMDDC), this paper proposes a fast-open circuit diagnostic method, which can be used under a wide super capacitor voltage range. According to different voltages endured by the lower arm under normal and fault conditions, a simple hardware detection circuit and a concise diagnosis algorithm built in FPGA are hence employed. The detection circuit is responsible for detecting the operating conditions of sub-module in real time, while the diagnosis algorithm accomplishes the final diagnosis using detection results and drives signals in a short time. The design principle of the proposed method and the selection principle of the key parameters are provided in detail. The proposed method avoids complex mathematical calculations and is easy to be implemented. Finally, the proposed diagnostic method is verified experimentally based on a scale down MMDDC energy storage prototype.关键词
超级电容储能系统/模块化多电平直流变换器/开路故障诊断/快速诊断/半桥子模组Key words
Super capacitor energy storage system/modular multilevel DC-DC converter/open circuit diagnostic/fast diagnostic/half bridge sub-module分类
信息技术与安全科学引用本文复制引用
毕恺韬,安群涛,孙东阳,段建东,孙力..基于子模组工况分析的模块化多电平储能系统开路故障诊断方法[J].电工技术学报,2018,33(6):1219-1226,8.基金项目
国家自然科学基金(51207029、51277040、51507039),中央高校基本科研业务费专项资金(HIT.NSRIF.2017013)和中国博士后科学基金资助(2016M591529)资助项目. （51207029、51277040、51507039）
