A Novel DC Voltage Detection Technique in the CHB Inverter-Based STATCOM
A Novel DC Voltage Detection Technique in the CHB Inverter-Based STATCOM
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DOI：
10.1109/tpwrd.2008.919251
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发表时间：
2008-06
影响因子：
4.4
通讯作者：
Yidan Li;Bin Wu
中科院分区：
文献类型：
--
作者：
Yidan Li;Bin Wu
提出了一种新的直流电压检测技术--单倍电压（SMV）检测器，用于获取级联H桥（CHB）多电平逆变器型静止同步补偿器（STATCOM）的直流电容电压。基于所提出的SMV算法，电压传感器的数量大大减少。只需要三个电压传感器就可以从逆变器输出电压中获得直流电容电压。本文还提出了一种新的直流电压平衡控制方法，结合移相技术和正弦脉宽调制（SPWM）的H桥直流电容电压的控制策略。通过Simulink仿真和基于dSPACE原型系统的实验，验证了基于CHB逆变器的STATCOM系统的性能、SMV检测器的准确性和直流电压平衡控制的有效性。
A novel dc voltage detection technique, referred to as single multiple-voltage (SMV) detector, is developed to obtain dc capacitor voltages in the cascaded H-bridge (CHB) multilevel inverter-based static synchronous compensator (STATCOM). Based on the proposed SMV algorithm, the number of voltage sensors is substantially reduced. Only three voltage sensors are required to obtain dc capacitor voltages from the inverter output voltage. The paper also presents a new dc voltage balance control method that combines the phase shifting technique and sinusoidal pulsewidth modulation (SPWM) strategy for the control of H-bridge dc capacitor voltages. The performance of CHB inverter- based STATCOM system, the accuracy of the developed SMV detector and the effectiveness of the proposed dc voltage balance control are verified by simulations in Simulink environment and experiments based on the dSPACE prototype system.