Scholarly publications exist on several aspects of adjustable-speed drives (ASDs). Their application considerations, benefits, specifications, and operation are well understood. Medium-voltage (MV) drives have been applied not only to upstream, midstream, and downstream industries of the oil and gas value chain but also in other industries such as pulp and paper, cement, water and waste water, power generation, and test stands. This has been possible because of reliable highcapacity power semiconductor devices. Heat loss is a major contributor to the lifecycle cost of an installation of MV drives. This is not understood initially but becomes significant when assessed over a 25-year life span. Air-cooled drives are specified at large horsepower ratings or in places with high or low ambient temperatures without fully understanding the long-term impact to reliability, safety, and running costs. On another note, line-side harmonics is also of concern not only to the power delivery apparatus of an operator?s plant but also to the utility providers. IEEE Standard 519-1992, which was revised in 2014, is often specified for MV drives, but the application and understanding of the standard are inconsistent among industry participants. This article addresses the foregoing two issues. First, it describes conventional and nonconventional methods for managing heat that the industry has developed and will cover application considerations when specifying, evaluating, procuring, and installing those solutions. The final part of the article reviews IEEE Standard 519-2014 and how it is applied in the context of an MV drive. Further, the article briefly touches online-side harmonic mitigation techniques that are employed and how to specify them to best avoid issues. Guideline for practicing engineers to familiarize themselves with the heat and harmonic issues of MV drives and how to tackle them successfully are also covered in this article.

中文翻译：

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热量和谐波：风冷 MV 可调速驱动器中最重要的问题以及如何处理？

关于可调速驱动器 (ASD) 的几个方面的学术出版物存在。它们的应用注意事项、优点、规格和操作都很好理解。中压（MV）驱动不仅应用于油气价值链的上、中、下游行业，还应用于制浆造纸、水泥、水与废水、发电、测试等其他行业站立。由于可靠的大容量功率半导体器件，这成为可能。热损失是中压变频器安装生命周期成本的主要贡献者。这一点最初不被理解，但在 25 年的寿命中评估时变得重要。风冷驱动器被指定为大马力额定值或环境温度高或低的地方，而没有完全了解对可靠性、安全性和运行成本的长期影响。另一方面，线侧谐波不仅与运营商工厂的输电设备有关，而且与公用事业供应商有关。2014 年修订的 IEEE 标准 519-1992 经常被指定用于中压变频器，但行业参与者对该标准的应用和理解不一致。本文针对上述两个问题进行了探讨。首先，它描述了行业开发的用于管理热量的传统和非常规方法，并将涵盖在指定、评估、采购和安装这些解决方案时的应用注意事项。文章的最后一部分回顾了 IEEE 标准 519-2014 以及如何将其应用于中压变频器的环境中。此外，本文还简要介绍了所采用的在线侧谐波抑制技术以及如何指定它们以最好地避免问题。本文还介绍了实践工程师熟悉中压变频器的热量和谐波问题以及如何成功解决这些问题的指南。