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Design Considerations in Selection and Sizing Large Synchronous Motors as Drivers for Centrifugal Compressors in LNG Applications

机译:选择和施胶大型同步电机的设计考虑因素作为LNG应用中的离心压缩机的驱动器

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摘要

Centrifugal compressors are major components in LNG liquefaction plants. Design considerations for optimal selection and proper sizing of compressor drivers include large starting torque requirements to enable compressor start from settle-out conditions and to prevent flaring the gas. Start-up capabilities of the motor driver can significantly impact the reliability and operability of the compressor train. API 617 on centrifugal compressors refers to API 546 for synchronous motor drivers. In this paper, requirements of API 617 and 546 are reviewed and several important design and sizing requirements are presented. In the effort to optimize plant design, and maintain the performance requirements, the paper discusses optimization options, such as direct on line starting method to explore the motor rating limits, and the use of synchronous motors for power factor correction to eliminate or reduce the need for reactive power compensation by capacitor banks. This paper presents a novel approach to show constant reactive power lines on traditional V curves. It also complements capability curves of synchronous motors with lines of constant efficiency.
机译:离心式压缩机是LNG液化植物中的主要成分。用于最佳选择和适当尺寸的压缩机驱动器的设计考虑包括大的起始扭矩要求,以使压缩机能够从定居条件开始并防止燃烧气体。电机驱动器的启动能力可以显着影响压缩机火车的可靠性和可操作性。离心式压缩机上的API 617是指同步电机驱动器的API 546。在本文中,综述了API 617和546的要求,并提出了几个重要的设计和尺寸要求。在优化工厂设计的努力下,保持性能要求,讨论了优化选项,如直接在线启动方法探讨电机额定值限制,以及使用同步电机的功率因数校正,以消除或减少需求用于电容器组的无功功率补偿。本文介绍了一种新的传统V曲线上恒定功率线的新方法。它还用恒定效率的线条补充了同步电机的能力曲线。

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