A High-Performance SPWM Controller for Three-Phase UPS Systems Operating Under Highly Nonlinear Loads
A High-Performance SPWM Controller for Three-Phase UPS Systems Operating Under Highly Nonlinear Loads
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DOI：
10.1109/tpel.2012.2227817
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发表时间：
2013-08
影响因子：
6.7
通讯作者：
B. Tamyurek
中科院分区：
文献类型：
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作者：
B. Tamyurek
针对三相不间断电源（UPS）系统在高非线性负载下运行的特点，设计了一种高性能的正弦脉宽调制（SPWM）控制器。经典的SPWM方法在控制UPS输出电压的有效值方面是非常有效的。然而，它是不够好的补偿谐波和失真所造成的特别是由整流器负载的非线性电流。失真在高功率下变得更加严重，其中开关频率由于效率问题而必须降低。本研究提出了一种新的设计策略，克服了经典RMS控制的局限性。它有效地将内环添加到闭环控制系统中，从而能够成功地减少谐波并补偿输出端的失真。Simulink是用来分析，开发和设计的控制器使用的逆变器的状态空间模型。该控制器是由德州仪器公司在TMS320 F2808 DSP实现的，并使用三相10 kVA Transformer隔离UPS在所有类型的负载条件下的性能进行了实验评估。总之，实验结果表明，控制器成功地实现了稳态有效值电压调节规格以及总谐波失真和主要UPS标准的动态响应要求。
This paper presents the design of a high-performance sinusoidal pulsewidth modulation (SPWM) controller for three-phase uninterruptible power supply (UPS) systems that are operating under highly nonlinear loads. The classical SPWM method is quite effective in controlling the RMS magnitude of the UPS output voltages. However, it is not good enough in compensating the harmonics and the distortion caused specifically by the nonlinear currents drawn by the rectifier loads. The distortion becomes more severe at high power where the switching frequency has to be reduced due to the efficiency concerns. This study proposes a new design strategy that overcomes the limitations of the classical RMS control. It adds inner loops to the closed-loop control system effectively that enables successful reduction of harmonics and compensation of distortion at the outputs. Simulink is used to analyze, develop, and design the controller using the state-space model of the inverter. The controller is implemented in the TMS320F2808 DSP by Texas Instruments, and the performance is evaluated experimentally using a three-phase 10 kVA transformer isolated UPS under all types of load conditions. In conclusion, the experimental results demonstrate that the controller successfully achieves the steady-state RMS voltage regulation specifications as well as the total harmonic distortion and the dynamic response requirements of major UPS standards.