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首页> 外文期刊>IEEE Transactions on Industrial Electronics >A Unified Phase-Shift Modulation for Optimized Synchronization of Parallel Resonant Inverters in High Frequency Power System
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A Unified Phase-Shift Modulation for Optimized Synchronization of Parallel Resonant Inverters in High Frequency Power System

机译：统一相移调制，用于优化高频电力系统中并联谐振逆变器的同步

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摘要

High frequency alternating current (HFAC) has already been applied in many power distribution systems due to outstanding merits. The circulation current control of the high frequency resonant inverter in parallel connection is more complicated than the low frequency counterpart. Methods from topology, modulation, and control perspectives have already been proposed; however, most of them are difficult to simultaneously accomplish the synchronization of magnitude and phase in high frequency circumstance. In this paper, a new modulation called as unified phase-shift modulation (PSM) is proposed to integrate the regulations of magnitude and phase. The unified PSM in steady state completely removes the modulation coupling between magnitude and phase so that the controllers of magnitude and phase can be independently accomplished without interactions. The operation scope of unified PSM is determined by zero voltage switching and total harmonic distortion of the resonant inverter. A prototype with two parallel inverters is established to verify the effectiveness with an operation frequency of 25 kHz and a full bridge output voltage of 40 V peak. The results of simulation and experiment prove that the unified PSM is superior over the existing PSM in HFAC circumstance. The controllers of magnitude and phase integrated by the proposed modulation can accomplish optimized output synchronization in the parallel single-stage resonant inverter.
机译：由于具有突出的优点，高频交流电（HFAC）已应用于许多配电系统中。并联的高频谐振逆变器的循环电流控制比低频谐振器复杂。已经从拓扑，调制和控制的角度提出了方法。然而，它们中的大多数在高频情况下难以同时完成幅度和相位的同步。在本文中，提出了一种称为统一相移调制（PSM）的新调制方式，以整合幅度和相位的规则。稳定状态下的统一PSM完全消除了幅度和相位之间的调制耦合，因此幅度和相位的控制器可以独立实现，而无需交互作用。统一PSM的工作范围由零电压开关和谐振逆变器的总谐波失真决定。建立了带有两个并联逆变器的原型，以在25 kHz的工作频率和40 V峰值的全桥输出电压下验证有效性。仿真和实验结果表明，在HFAC环境下，统一的PSM优于现有的PSM。通过所提出的调制集成的幅度和相位控制器可以在并联单级谐振逆变器中实现优化的输出同步。

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