Communicationless hot-swap paralleling of three-phase inverters with isochronous frequency

2008 IEEE International Symposium on Industrial Electronics Pub Date : 2008-11-18 DOI:10.1109/ISIE.2008.4677171

D. Neacşu

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引用次数: 2

Abstract

This paper presents a technology used for communicationless hot-swap parallel operation of three-phase inverters with isochronous frequency. This novel technology is implemented within auxiliary power distribution systems used to deliver 50 Hz, 60 Hz or 400 Hz three-phase, four-wire power to remote locations from a variable DC power supply (engine, generator, battery bank). The regulation of the output voltage waveform during operation of each individual converter is ensured with a special algorithm. Blanking time, zero-current clamping, and the cross-coupling inductive terms are compensated from the instantaneous phase current. This new algorithm allows multiple identical units to work on the same three-phase AC bus in a parallel manner. The parallel operation includes a start-up and synchronization algorithm able to provide hot-swap operation. The conventional droop coefficient method is herein transformed into a non-linear controller able to satisfy the requirements of isochronous frequency operation. Such requirement is imposed by operation of military or medical equipments based on a constant grid frequency.

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等时频率三相逆变器无通信热插拔并联

提出了一种实现同步频率三相逆变器无通信热插拔并联的技术。这项新技术在辅助配电系统中实现，用于从可变直流电源(发动机，发电机，电池组)向远程位置提供50 Hz, 60 Hz或400 Hz三相四线电源。通过一种特殊的算法来保证各变换器运行时输出电压波形的调节。下料时间、零电流箝位和交叉耦合电感项由瞬时相电流补偿。这种新算法允许多个相同的单元以并行的方式在同一三相交流总线上工作。并行操作包括能够提供热插拔操作的启动和同步算法。本文将传统的下垂系数法转化为一种能够满足频率同步运行要求的非线性控制器。这种要求是由于军事或医疗设备基于恒定的电网频率运行而产生的。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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2008 IEEE International Symposium on Industrial Electronics

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