分布式能源与电网连接 第42部分：用于控制分布式能源和负载的电压测量的技术要求

[中文适用范围]： IEC TS 62786-42:2026 规定了用于控制连接至配电网的分布式能源资源（DER）和负载的交流电压测量的最低要求。本文件规定了电压幅值测量的特性，以评估其性能（包括电压和频率测量范围、精度、电压和频率工作范围、分辨率等）。本文件描述了电压测量的主要使用场景及其相应的性能水平。本文件描述了评估规定特性的功能性测试原理，并定义了在稳态或动态条件下影响这些性能的相关因素。本文件定义了适用于嵌入在DER或负载控制器内部或作为外部控制系统执行的电压测量的功能性要求。在DER的情况下，本文件是IEC 62786系列其他部分所定义要求的一个子部分。本文件适用于连接至配电网接入点的任何电压等级的DER和负载。本文件未规定用于电压测量的硬件、软件或方法，也未规定与硬件设备相关环境条件的测试（如气候、机械应力、电磁兼容性测试等）。 [外文原描述]： IEC TS 62786-42:2026 defines minimum requirements for AC voltage measurement used to control distributed energy resources (DER) and loads connected to distribution networks. This document specifies the characteristics of voltage magnitude measurement to evaluate their performances (including voltage and frequency measuring range, accuracy, voltage and frequency operating range, resolution, etc). This document describes the main use cases of voltage measurement, with associated level of performances. This document 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 voltage measurement which can be embedded inside DER or loads controller or performed as an external control system. In the case of DER, this document is a subpart of requirements which are defined in the other parts of the IEC 62786 series. This document is applicable to DER and loads regardless of voltage level at the point of connection to the distribution grid. This document does not specify hardware, software or a method for voltage measurement. It does not specify tests linked to environmental conditions associated to hardware devices (climatic, mechanical stress, electromagnetic compatibility test, etc).