摘要
根据容错并联型有源电力滤波器(APF)故障时对系统稳定性的影响,提出了相应的控制策略。分析了故障状态下直流侧电压波动对系统稳定性的影响,即利用李雅普诺夫间接法分析逆变器某相故障时,直流侧电压波动会导致系统不稳定。提出了稳定直流侧总电压和两个电容均压的控制策略,将这两种电压控制结合到i_p-i_q算法中。实验结果表明容错并联型APF在正常工作状态和故障状态都能较好地抑制谐波,保持直流侧电压稳定,系统稳定可靠。
The system stability of a fault-tolerant paralleling active power filter（APF） is affected under fault state in the inverter.The corresponding controlling strategy is proposed.The influence on system by the DC-side voltage is analyzed under fault state.Lyaponov＇s first method is used to analyze the system unstable caused by the fluctuation on the DC- side voltage when one phase of the inverter is fault.The method to stabilize the DC-side voltage and capacitor voltages is proposed.Two voltages control are connected with the method of ip-iq.The experimental results show that harmonic currents are suppressed by the fault-tolerant paralleling APF whether working on normal state or fault state.The DC- link voltage stays stable and the system has high reliability.
出处
《电力电子技术》
CSCD
北大核心
2013年第8期55-57,共3页
Power Electronics
基金
中南大学中央高校基本科研业务费专项资金(721500232)~~
关键词
有源电力滤波器
谐波抑制
三相四开关
active power filter
harmonic suppression
three-phase four-switch
