分布式能源与电网连接第3部分：固定式电池储能系统的附加要求

[中文适用范围]： 本部分 IEC 62786 是一项技术规范，提供了分布式电池储能系统(BESS)与配电网互联的原则和技术要求。适用于与配电网互联的 BESS 的设计、运行和测试。包括 BESS 的附加要求，如连接方案、开关设备选择、正常运行范围、抗扰性、频率偏差的有功功率响应、电压变化和电压波动的无功功率响应、EMC 和电能质量、接口保护、连接和开始发电、有功功率管理、监控、控制和通信以及并网测试。 本文件考虑的固定式 BESS 包括铅酸、锂离子、液流和钠硫电池等电化学形式，通过双向 DC-AC 功率转换器与中压(MV)或低压(LV)配电网互联。本文件将规定分布式 BESS 的有功和无功功率响应以及并网测试，作为 IEC TS 62786-1:2023 的补充。 本文件规定了与标称频率为 50 Hz 或 60 Hz 的配电网连接的分布式 BESS 的接口要求。 注：移动电能存储设备(如电动汽车)正在考虑用于未来的版本。 [外文原描述]： IEC TS 62786-3:2023, which is a Technical Specification, provides principles and technical requirements for interconnection of distributed Battery Energy Storage System (BESS) to the distribution network. It applies to the design, operation and testing of BESS interconnected to distribution networks. It includes the additional requirements for BESS, such as connection scheme, choice of switchgear, normal operating range, immunity to disturbance, active power response to frequency deviation, reactive power response to voltage variations and voltage changes, EMC and power quality, interface protection, connection and start to generate electric power, active power management, monitoring, control and communication, and grid-connected tests. The stationary BESSs considered within the scope of this document include electrical forms such as lead-acid, lithium-ion, liquid flow and sodium-sulfur batteries, interconnected to medium voltage (MV) or low voltage (LV) distribution networks via bidirectional DC to AC power converters. This document will specify active and reactive power response and grid-connected testing for distributed BESS, as a supplement for IEC TS 62786-1:2023. This document specifies interface requirements for connection of distributed BESS with the distribution network operating at a nominal frequency of 50 Hz or 60 Hz.