面向设计的电力同步电压源变换器控制回路交互分析

Federico Cecati, M. Liserre, Y. Liao, Xiongfei Wang, F. Blaabjerg
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引用次数: 2

摘要

功率同步机制与直流链路耦合,因为同步和直流链路的动态都依赖于有功功率。用于频率下垂的有源电力滤波器与惯量仿真相关,惯量仿真影响直流链路电压。此外,低压电网中有功和无功功率之间的耦合表明直流链路和无功控制之间可能存在相互作用。在基于功率同步的变换器中,所有控制回路和直流链路之间的强耦合对稳定性和控制器的整定都提出了挑战。本文研究了考虑各控制回路相互作用的功率同步变换器的整定问题。推导了一个完整的变换器状态空间模型,并提出了一种基于特征值分析的分步调谐方法。实验结果证明了该方法的有效性。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Design Oriented Analysis of Control Loops Interaction in Power Synchronization-based Voltage Source Converter
Power synchronization mechanism is coupled with the dc-link, since both synchronization and dc-link dynamics depend on the active power. The active power filter used in the frequency droop is correlated with inertia emulation, which affects the dc-link voltage. Furthermore, the coupling between active and reactive power in the low-voltage grid suggests a possible interaction between dc-link and reactive power control. The strong coupling between all the control loops and the dc-link in power synchronization-based converters represents a challenge both for the stability and for the controller tuning. This paper addresses the tuning of power synchronization-based converter with consideration of all the control loops interactions. A complete converter state-space model is derived, and a step-by-step tuning procedure based on eigenvalue analysis is proposed. Experimental results are provided to demonstrate the method.
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