自适应观测器M2C故障诊断与容错运行策略

发布时间：2018-06-11 18:51

本文选题：模块化多电平换流器 + 自适应观测器　；参考：《电力电子技术》2017年11期

【摘要】：模块化多电平换流器(M2C)作为中高压大功率电能转换、传输等工况的核心拓扑,最大限度的提升其连续安全稳定运行能力是变流器系统设计的首要目标。为实现在线检测M2C故障状态,快速定位故障子模块位置,同时在该过程提升系统的容错运行能力,提出一种基于自适应观测器的M2C故障诊断与容错运行策略。建立系统数学模型,分析M2C子模块故障后系统状态变化;以系统内部环流与输出电流作为观测对象,设计适合M2C的自适应观测器,在线监测系统是否处于故障状态,并迅速判断故障点位置;重构系统各相上、下桥臂电压调制信号,实现故障状态下的容错运行,最大限度提升系统连续安全可靠运行能力;最后通过实验验证了所提控制方法的可行性和有效性。
[Abstract]:Modularized multilevel converter (M2C), as the core topology of medium-high voltage and high-power conversion, transmission and other working conditions, is the primary goal of the converter system design to maximize its continuous safe and stable operation capability. In order to detect the M2C fault state online, locate the fault submodule position quickly, and improve the fault tolerant ability of the system in this process, an adaptive observer based M2C fault diagnosis and fault-tolerant operation strategy is proposed. The mathematical model of the system is established to analyze the change of the system state after the failure of the M2C submodule, and the adaptive observer suitable for M2C is designed to monitor whether the system is in the fault state on line, taking the circulation and output current of the system as the observation object. At the same time, the position of fault point is judged quickly, the voltage modulation signal of the lower arm is reconstructed on each phase of the system, the fault-tolerant operation is realized under the condition of fault, and the continuous safe and reliable operation ability of the system is enhanced to the maximum extent. Finally, the feasibility and effectiveness of the proposed control method are verified by experiments.
【作者单位】：中核核电运行管理有限公司;大连理工大学电气工程学院;
【基金】：辽宁省博士启动基金计划项目(20151023)~~
【分类号】：TM46

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