Selective Harmonic Compensation (SHC) PWM for Grid-Interfacing High-Power Converters
Selective Harmonic Compensation (SHC) PWM for Grid-Interfacing High-Power Converters
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DOI：
10.1109/ecce.2011.6064322
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发表时间：
2011-11
影响因子：
6.7
通讯作者：
Hua Zhou;Y. Li;N. Zargari;Zhongyuan Cheng
中科院分区：
文献类型：
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作者：
Hua Zhou;Y. Li;N. Zargari;Zhongyuan Cheng
补偿电网接口转换器系统（例如驱动系统的有源前端整流器或分布式发电系统中的并网逆变器）中的电网背景谐波是减少网侧电流谐波的有效方法。然而，这种谐波补偿在中压高功率应用（>1 MVA）中尤其具有挑战性。这主要是由于高功率转换器（300-800 Hz）的低开关频率操作，以保持低功率损耗。因此，具有相对高的开关频率的有源电力滤波器的传统任务在这里不容易实现。本文提出了一种新的脉宽调制技术，命名为选择性谐波补偿（SHC），它主动补偿电力系统的背景谐波，但仍然工作在非常低的开关频率。现呈列拟议特别资助委员会的详情。文中给出了SHC在大功率电流型整流器上的应用实例。仿真和实验结果表明，所提出的SHC方案可以有效地补偿系统的背景谐波，改善线电流谐波性能。
Compensating the grid background harmonics in a grid-interfacing converter system, such as a drive system's active-front-end rectifier or a grid-connected inverter in a distributed generation system, is an effective method of reducing line side current harmonics. However, this harmonic compensation is particularly challenging in medium-voltage high-power applications (>1 MVA). This is mainly due to the low-switching frequency operation of high-power converters (300-800 Hz) to maintain low power loss. Therefore, the traditional tasks of active power filters with relatively high-switching frequency cannot be easily realized here. This paper proposes a new pulse width modulation technique, named selective harmonic compensation (SHC), which actively compensates the power system background harmonics, but still operates at very low-switching frequencies. Details of the proposed SHC are presented. An SHC application example on a high-power current-source rectifier is provided in this paper. The simulations and experiments show that the proposed SHC scheme can effectively compensate the system background harmonics and improve the line current harmonic performance.