IEC TS 61400-26-4:20 24是一项技术规范，规定了用于识别和报告可靠性指标的术语和信息类别。这些定义适用于关键部件、任何数量的风力涡轮机、风力涡轮机类型的机队、风力发电站或风力发电站组合。从公共耦合的角度来看，风力发电站由所有WTGS（风力涡轮发电机系统）、功能服务和工厂元件的平衡组成。 本文件提供了关于可靠性方法的指南，并附有关于使用的信息性附件。 它扩展了IEC 61400-26-1中的信息模型，认识到可用性和可靠性是相互关联的。

IEC TS 61400-26-4:2024, which is a Technical Specification, specifies terms and information categories for identification and reporting of reliability metrics. The definitions are applicable to key components, any number of wind turbines, fleets of wind turbine types, a wind power station or a portfolio of wind power stations. The wind power station is made up of all WTGSs (Wind Turbine Generator Systems), functional services and balance of plant elements as seen from the point of common coupling.
This document provides guidelines regarding reliability methodologies with informative annexes regarding use.
It expands on the information model in IEC 61400-26-1, recognizing that availability and reliability are interrelated.