与电网的分布式能源连接.第41部分:用于控制分布式能源（DER）和负载的频率测量要求

[中文适用范围]： 本部分IEC 62786作为技术规范，定义了用于控制连接到电力网络的分布式能源（DER）和负载的频率和频率变化率测量的最低要求。 本文件规定了频率和频率变化率测量的特性以评估其性能。它描述了频率和频率变化率测量的主要用例，以及相关的性能水平。它描述了评估指定特性的功能测试原则，并定义了在稳态或动态条件下影响这些性能的影响因素。 本文件适用于频率和频率变化率测量的功能要求，这些测量可以在DER或负载内部或外部进行。对于DER，本文件提供了除IEC 62786其他部分或相关IEC技术委员会（例如TC 82用于光伏系统，TC 88用于风能系统，TC 120用于电能存储系统（EES））制定的标准之外的额外要求。 本文件适用于DER和负载，无论其连接到电网的电压水平如何。 本文件不指定频率或频率变化率测量的硬件、软件或方法。它不指定与硬件设备相关的环境条件测试（气候、超过3 kHz的电磁干扰、机械应力等）。 与时间戳相关的频率和频率变化率测量不在本文件范围内。这些测量已由IEC 60255-118-1涵盖。 与保护功能或保护继电器相关的频率和频率变化率测量不在本文件范围内。这些要求已由IEC 60255-181涵盖。 注：如第一段所述，本文件侧重于用于控制DER和负载的频率和频率变化率测量。但本文件中定义的技术要求，包括声明的特性列表及其相关的功能测试，也可适用于其他需要“快速”频率和ROCOF测量的用途（连接到输电或配电网络的小型或大型发电站、功率计设备、电能质量仪器等）。 [外文原描述]： IEC TS 62786-41:2023 (E), which is a Technical Specification, defines minimum requirements for frequency and rate of change of frequency measurements used to control distributed energy resources (DER) and loads connected to electrical power networks. This document specifies the characteristics of frequency and rate of change of frequency measurements to evaluate their performances. It describes the main use cases of frequency and rate of change of frequency measurements, with associated level of performances. It describes the principle of functional tests to evaluate the specified characteristics and defines the influencing factors that affect these performances, under steady state or dynamic conditions. This document defines the functional requirements applicable to frequency and rate of change of frequency measurements which can be inside or outside the DER or loads. In the case of DER, this document provides requirements additional to those which are defined in the other parts of IEC 62786 or standards produced by the relevant IEC technical committees (e.g. TC 82 for photovoltaic systems, TC 88 for wind systems, TC 120 for electrical energy storage systems (EES)). This document is applicable to DER and loads regardless of the voltage level of the point of connection to the grid. This document does not specify hardware, software or a method for frequency or rate of change of frequency measurement. It does not specify tests linked to environmental conditions associated with hardware devices (climatic, electromagnetic disturbances above 3 kHz, mechanical stress, etc.). Frequency and rate of change of frequency measurements associated with time stamping are not in the scope of this document. These measurements are already covered by IEC 60255 118 1. Frequency and rate of change of frequency measurements associated with protection functions or protection relays are not in the scope of this document. These requirements are already covered by IEC 60255-181.