Feedforward Compensation of the ESS Low-Frequency Current Ripple in the Three-Ports ANPC Converter

S. A. Teston, Kaio Vinícius Vilerá, M. Mezaroba, C. Rech
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引用次数: 1

Abstract

This paper proposes a feedforward control to mitigate the low-frequency current ripple in the secondary dc port current of the three-ports active neutral-point-clamped converter (ANPC-3P). This low-frequency current ripple is caused by the low-frequency voltage ripple at the inverter dc buses. Current ripple is an important design parameter for energy storage systems (ESS) and must be kept low to extend the ESS life cycle. Low-frequency current ripple is difficult to filter and thereby it should be avoided. In this paper, ESS current control system is composed of a proportional-integral (PI) controller associated with a proposed feedforward action. This control scheme is capable of generating a dc current without low-frequency ripple. The ac output current (grid current) is controlled by a resonant controller. The theoretical propositions are validated by simulation results.
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三端口ANPC变换器中ESS低频纹波的前馈补偿
针对三端口有源中性点箝位变换器(ANPC-3P)直流二次端口电流中的低频纹波,提出了一种前馈控制方法。这种低频电流纹波是由逆变器直流母线上的低频电压纹波引起的。电流纹波是储能系统的一个重要设计参数,为了延长储能系统的寿命周期,必须将电流纹波控制在较低的水平。低频电流纹波难以滤波,应尽量避免。在本文中,ESS电流控制系统由一个比例积分(PI)控制器和一个前馈动作组成。该控制方案能够产生无低频纹波的直流电流。交流输出电流(栅极电流)由谐振控制器控制。仿真结果验证了理论命题的正确性。
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Dynamic Analysis of Self-excited SRG Operating in Open Loop Predictive Voltage Control Operating at Fixed Switching Frequency of a Neutral-Point Clamped Converter Feedforward Compensation of the ESS Low-Frequency Current Ripple in the Three-Ports ANPC Converter Comparative study of RC snubber configurations in switching circuits Steady-State Characterization of the Three-Phase Isolated DC-DC Bidirectional Converter with LLC Resonant Tank
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