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

doi:10.19595/j.cnki.1000-6753.tces.161255

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摘要

储能系统中直流变换器的安全性及可靠性直接关系到系统是否正常运行。通过对模块化多电平直流变换器中半桥子模组故障运行工况的分析,提出一种在超级电容模组宽工作电压范围下的快速开路故障诊断方法。该方法根据正常及故障时半桥子模组下桥臂承受电压的不同,利用简单的硬件检测电路以及基于FPGA的诊断算法实现快速开路故障诊断。硬件检测电路能够实时对半桥子模组运行工况进行检测,FPGA中故障诊断算法则利用检测结果并结合驱动信号在短时间内完成故障诊断。详细给出所提方法的设计原理以及关键参数的选取原则。该方法避免了复杂的数学运算,容易实现。最后,通过搭建小功率模块化多电平储能系统对所提方法进行了验证。

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	毕恺韬
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	孙力

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

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.

Key words： Super capacitor energy storage system modular multilevel DC-DC converter open circuit diagnostic fast diagnostic half bridge sub-module

收稿日期: 2016-08-08 出版日期: 2018-03-28

PACS:

TM46

基金资助:

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

作者简介: 毕恺韬男,1989年生,博士研究生,研究方向为大功率储能系统以及电力电子变换器故障诊断等。E-mail: 1039351556@qq.com;安群涛男,1984年生,博士,副教授,研究方向为电机控制以及新能源发电技术。E-mail: anquntao@163.com（通信作者）

引用本文:

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. Bi Kaitao, An Quntao, Sun Dongyang, Duan Jiandong, Sun Li. Modular Multilevel Energy Stroage System Open Circuit Diagnostic Method Based on Sub-Module Operation Analysis. Transactions of China Electrotechnical Society, 2018, 33(6): 1219-1226.

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https://dgjsxb.ces-transaction.com/CN/10.19595/j.cnki.1000-6753.tces.161255 https://dgjsxb.ces-transaction.com/CN/Y2018/V33/I6/1219

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