风能发电系统.第12-4部分:风力涡轮机功率性能试验的数值现场校准

[中文适用范围]： IEC 61400-21-3 为确定风力涡轮机（WT）谐波模型的应用、结构和推荐指南提供了基础原则。本技术报告中的谐波模型是指代表不同类型的风力涡轮机与所连接网络相互作用产生的谐波发射的模型。本文件侧重于提供关于风力涡轮机谐波模型的技术指南，详细描述了模型的应用、结构以及验证。通过引入对风力涡轮机谐波性能表示的共同理解，本文件旨在使谐波模型的整体概念更贴近行业（例如供应商、开发商、系统运营商、学术界等）。本文件提出了一种标准化的风力涡轮机谐波模型表示方法。该谐波模型将在与海上和陆上风电场（WPP）的电气基础设施的设计、分析和优化相关的许多电气工程领域得到广泛应用。 [外文原描述]： IEC TR 61400-21-3:2019 provides guidance on principles which can be used as the basis for determining the application, structure and recommendations for the WT harmonic model. For the purpose of this Technical Report, a harmonic model means a model that represents harmonic emissions of different WT types interacting with the connected network. This document is focused on providing technical guidance concerning the WT harmonic model. It describes the harmonic model in detail, covering such aspects as application, structure, as well as validation. By introducing a common understanding of the WT representation from a harmonic performance perspective, this document aims to bring the overall concept of the harmonic model closer to the industry (e.g. suppliers, developers, system operators, academia, etc.). A standardized approach of WT harmonic model representation is presented in this document. The harmonic model will find a broad application in many areas of electrical engineering related to design, analysis, and optimisation of electrical infrastructure of onshore as well as offshore WPPs.