摘要
H桥级联静止同步补偿器(STATCOM)直流侧电容电压的波动,会引起系统直流侧母线电压不平衡,从而影响系统的可靠运行。针对该问题,在直流侧电容电压三级平衡控制策略的基础上,采用比例谐振(PR)控制器对全局平均直流电压进行控制,以提高控制效果;采用自抗扰控制器(ADRC)对相间直流电压进行平衡控制,实现对外界扰动的动态补偿;采用上下平移每个功率单元调制波的方法,实现相内直流电压平衡控制,并配合载波相移调制策略(CPS-PWM),易于FPGA数字实现。实验结果表明,提出的控制方法是有效的,且具有良好的动态性能和较强的鲁棒性。
The DC capacitor voltage fluctuation of H-bridge cascaded STATCOM will induce the DC voltage imbalance and influence the reliable system operation,aiming at which,the PR（Proportional Resonant） controller based on the three-level balance control strategy of DC capacitor voltage is adopted to improve the average global DC voltage control;the ADRC（Active Disturbance Rejection Controller） is applied to realize the inter- phase DC voltage balance control and the dynamic compensation for outside disturbance;the modulation wave of each power unit is translated to realize the in-phase DC voltage balance control and,combined with the CPS-PWM（Carrier Phase Shifting PWM）,to facilitate the FPGA digital realization. Experimental results show that,being effective,the proposed control method has good dynamic performance and strong robustness.
出处
《电力自动化设备》
EI
CSCD
北大核心
2015年第5期15-22,共8页
Electric Power Automation Equipment
基金
国家自然科学基金重点资助项目(51237002)
台达电力电子科教发展计划重大项目(DREM2012001)~~
关键词
H桥级联
静止同步补偿器
直流侧电容电压平衡
比例谐振控制
自抗扰控制
调制波平移
控制
H-bridge cascading
static synchronous compensator
DC capacitor voltage balancing
proportional resonant control
active disturbance rejection control
modulation wave translation
control
