Ma Chao-Tsung, Gu Zhen-Huang
Department of Electrical Engineering, CEECS, National United University, Miaoli 36063, Taiwan.
Micromachines (Basel). 2020 Jan 24;11(2):134. doi: 10.3390/mi11020134.
Renewable energy (RE)-based power generation systems and modern manufacturing facilities utilize a wide variety of power converters based on high-frequency power electronic devices and complex switching technologies. This has resulted in a noticeable degradation in the power quality (PQ) of power systems. To solve the aforementioned problem, advanced active power filters (APFs) with improved system performance and properly designed switching devices and control algorithms can provide a promising solution because an APF can compensate for voltage sag, harmonic currents, current imbalance, and active and reactive powers individually or simultaneously. This paper demonstrates, for the first time, the detailed design procedure and performance of a digitally controlled 2 kVA three-phase shunt APF system using gallium nitride (GaN) high electron mobility transistors (HEMTs). The designed digital control scheme consists of three type II controllers with a digital signal processor (DSP) as the control core. Using the proposed APF and control algorithms, fast and accurate compensation for harmonics, imbalance, and reactive power is achieved in both simulation and hardware tests, demonstrating the feasibility and effectiveness of the proposed system. Moreover, GaN HEMTs allow the system to achieve up to 97.2% efficiency.
基于可再生能源（RE）的发电系统和现代制造设施使用了各种各样基于高频电力电子器件和复杂开关技术的功率转换器。这导致电力系统的电能质量（PQ）明显下降。为了解决上述问题，具有改进系统性能以及经过合理设计的开关器件和控制算法的先进有源电力滤波器（APF）可以提供一个很有前景的解决方案，因为APF能够单独或同时补偿电压暂降、谐波电流、电流不平衡以及有功和无功功率。本文首次展示了一种使用氮化镓（GaN）高电子迁移率晶体管（HEMT）的数字控制2 kVA三相并联APF系统的详细设计过程和性能。所设计的数字控制方案由三个以数字信号处理器（DSP）为控制核心的II型控制器组成。使用所提出的APF和控制算法，在仿真和硬件测试中均实现了对谐波、不平衡和无功功率的快速准确补偿，证明了所提系统的可行性和有效性。此外，GaN HEMT使系统效率高达97.2%。
