IEC 61000的这一部分本质上是信息性的，提供了可作为确定干扰装置与低压（LV）公共电力系统连接要求基础的原则指南。就IEC 61000本部分而言，干扰装置是指产生干扰的装置（可能是负载或发电机）:谐波和/或间谐波、电压闪烁和/或快速电压变化和/或电压不平衡。主要目标是为系统运营商或业主提供工程实践指导，这将有助于为所有连接的客户安装提供足够的服务质量。 在解决装置问题时，本报告无意取代排放限值的设备标准。注1:在本报告中，低压（LV）指Un≤ 1 kV。本报告论述了系统吸收干扰的能力分配。它没有解决如何缓解干扰，也没有解决如何增加系统的容量。本技术报告仅适用于连接到低压公共电力系统的装置，该系统提供或可能提供其他低压负载或装置。它适用于超过最小尺寸的大型装置。 该最小尺寸（Smin）由系统操作员或所有者根据系统特性指定。注2:由于该最小尺寸，本报告通常不适用于住宅客户的安装。本技术报告无意为连接至低压系统的单个设备设定排放限值。低压设备的排放限值在适用的IEC产品系列标准中有规定。这些标准中规定的限值是根据对连接到供电系统的装置中产生干扰的设备的数量、类型和使用的假设以及IEC 60725中给出的参考阻抗确定的，该阻抗被认为是小型住宅装置源阻抗的代表。 这些假设可能不适用于较大的低压装置。因此，本报告中的指南旨在提供制定此类大型装置排放限值的方法。注3:遵守通过应用本报告中的方法确定的排放限值并不排除遵守设备排放限值的任何要求（由国家或地区监管要求确定）。本技术报告涉及低压装置发出的低频传导干扰。考虑的干扰有:-谐波和间谐波； -闪烁和快速电压变化不平衡（负序分量）。由于本报告中概述的准则必然基于某些简化假设，因此无法保证该方法始终为所有情况提供最佳解决方案。当全部或部分应用给定的评估程序时，就工程而言，建议的方法应具有灵活性和判断力。系统操作员或所有者负责规定干扰装置与系统连接的要求。 干扰安装应理解为客户的完整安装（即包括干扰和非干扰部件）。本报告提供了制定大型低压装置排放限值的推荐程序。为了使任何网络运营商或所有者能够充分应用本报告，专家需要针对所运营的特定低压网络类型得出适当的系数。注4:在某些情况下，通过为所有低压网络设置一组表格来简化排放限值，可能会导致限值过于保守。本报告的主要部分给出了为低压连接的大型装置分配谐波、电压波动和不平衡排放限值的一般程序。 本报告附件提供了补充信息。附录A给出了配电专家级或国家法规级技术应用的实际示例，以便从通用方法中得出根据其网络的特定特征量身定制的各自限值。附录B给出了配电运营商级基于低压网络本地参数连接特定装置的实际应用示例。附录C和附录D详细介绍了本报告中推导和理解程序的理论基础。

This part of IEC 61000, which is informative in its nature, provides guidance on principles that can be used as the basis for determining the requirements for the connection of disturbing installations to low voltage (LV) public power systems. For the purposes of this part of IEC 61000, a disturbing installation means an installation (which may be a load or a generator) that produces disturbances: harmonics and/or interharmonics, voltage flicker and/or rapid voltage changes, and/or voltage unbalance.The primary objective is to provide guidance to system operators or owners for engineering practices, which will facilitate the provision of adequate service quality for all connected customer installations. In addressing installations, this report is not intended to replace equipment standards for emission limits.NOTE 1 In this report, low voltage (LV) refers to Un ≤ 1 kV. This report addresses the allocation of the capacity of the system to absorb disturbances. It does not address how to mitigate disturbances, nor does it address how the capacity of the system can be increased.This technical report only applies to installations connected to LV public power systems that supply or may supply other LV loads or installations. It is intended to apply to large installations exceeding a minimum size. This minimum size (Smin) is to be specified by the system operator or owner depending on the system characteristics.NOTE 2 Due to this minimum size, this report generally does not apply to residential customer's installations. This technical report is not intended to set emission limits for individual pieces of equipment connected to LV systems.The emission limits for LV equipment are specified in the applicable IEC product family standards. The limits specified in these standards have been determined based on assumptions of the number, type and usage of equipment producing disturbances in an installation connected to a supply system and based on the reference impedance given in IEC 60725 considered to be representative of the source impedance for small residential installations. The assumptions may not apply to larger LV installations. Hence, the guidelines in this report are intended to provide methods for developing emission limits for such large installations.NOTE 3 Compliance with emission limits determined by application of the methods in this report does not preclude any requirement to comply with equipment emission limits (as determined by national or regional regulatory requirements).This technical report deals with low-frequency conducted disturbances emitted by LV installations. The disturbances considered are: - harmonics and interharmonics; - flicker and rapid voltage changes; - unbalance (negative-sequence component).Since the guidelines outlined in this report are necessarily based on certain simplifying assumptions, there is no guarantee that this approach will always provide the optimum solution for all situations. The recommended approach should be used with flexibility and judgment as far as engineering is concerned, when applying the given assessment procedures in full or in part. The system operator or owner is responsible for specifying requirements for the connection of disturbing installations to the system. The disturbing installation is to be understood as the customer's complete installation (i.e. including disturbing and non-disturbing parts). This report provides recommended procedures for developing emission limits for large LV installations. In order for any network operator or owner to fully apply this report, an expert would need to derive appropriate factors for the specific types of LV networks operated.NOTE 4 Simplification of emission limits by setting one set of tables for all LV networks may, in some cases, result in excessively conservative limits. The main part of this report gives the general procedure to allocate emission limits for harmonics, voltage fluctuation and unbalance to large installations connected at LV.Annexes to this report give additional information.Annex A gives a practical example of technical application at distribution expert level or national regulation level, in order to derive their own limits tailored on the specific characteristics of their networks from the general method.Annex B gives an example of practical application at distribution operator level for the connection of specific installations based on the local parameters of the LV network.Annex C and Annex D give details on the theoretical basis for the derivation and the understanding of the procedures in this report.