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首页> 外文期刊>IEEE Transactions on Industrial Electronics >Evaluation of Techniques for Cross-Coupling Decoupling Between Orthogonal Axes in Double Synchronous Reference Frame Current Control
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Evaluation of Techniques for Cross-Coupling Decoupling Between Orthogonal Axes in Double Synchronous Reference Frame Current Control

机译：双同步参考系电流控制中正交轴间交叉耦合解耦技术的评价

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Current control in voltage source converters under balanced conditions is often performed by proportional–integral (PI) controllers in a single synchronous reference frame (SRF). The cross-coupling between its $dq$-axes is usually decoupled by a state-feedback (SF) decoupling technique, and less frequently by an alternative procedure based on complex vectors (CVs). In case of imbalance, the single SRF is commonly replaced by PI controllers in a pair of SRFs rotating with opposite sequences, which is known as double SRF control (DSRFC). It is generally assumed that the SF decoupling strategy can be applied to decouple the cross-coupling between the orthogonal axes of each SRF in DSRFC, as for a single SRF structure. This paper proves that the SF technique does not produce a noticeable improvement in DSRFC, because the terms added to each SRF interfere with those added to the opposite-sequence SRF; in addition, it is shown that the CV decoupling strategy, which has not been applied to DSRFC before, provides an enhancement in axes decoupling for low bandwidth values. Experimental results confirm the theory.
机译：电压源转换器在平衡条件下的电流控制通常由比例积分（PI）控制器在单个同步参考帧（SRF）中执行。它的$ dq $轴之间的交叉耦合通常通过状态反馈（SF）解耦技术进行解耦，而通过基于复矢量（CV）的替代过程进行耦合的可能性较小。在不平衡的情况下，单个SRF通常由一对相反方向旋转的SRF中的PI控制器代替，这称为双SRF控制（DSRFC）。通常认为，对于单个SRF结构，SF去耦策略可以应用于DSRFC中每个SRF正交轴之间的交叉耦合解耦。本文证明了SF技术不会在DSRFC中产生明显的改进，因为添加到每个SRF的术语会干扰添加到反向序列SRF的术语。此外，还表明，以前未应用于DSRFC的CV去耦策略为低带宽值的轴去耦提供了增强。实验结果证实了这一理论。

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