北极星储能网讯,5月7日,中电联发布关于征求国家标准《户用光储一体机技术要求》意见的函。文件适用于220/380V电压等级的单相或三相户用光储一体机的设计、制造、试验、检测、运行、维护和检修。编制说明提出,为及时解决新能源+储能”技术快速发展中出现的新情况、新问题,促进户用光储一体机又好又快发展,巫需标准标准户用光储一体机技术要求。其中针对户用光储一体机电气性能部分方面要求如下:
过载能力:户用光储一体机交流侧电流在110%额定电流下,持续运行时间不应少于10min;户用光储一体机交流侧电流在120%额定电流下,持续运行时间不应少于1min。
充放电转换时间:户用光储一体机从90%额定功率充电到90%额定功率放电的转换时间以及90%额定功率放电到90%额定功率充电的转换时间均不应大于100 ms。
并离网切换时间:
户用光储一体机的并网转离网切换时间应满足以下要求:
a) 户用光储一体机接收外部计划性孤岛指令时,从接收到切换指令到完成建立负载额定电压的主动并网转离网切换时间不应大于200 ms;
b) 户用光储一体机自主识别计划性孤岛时,从电网中断到完成建立负载额定电压的被动并网转离网切换时间不应大于2 s。
户用光储一体机由离网转为并网模式时,应在电网端口电压、频率和相位角满足同期条件后,切换时间宜不超过200 ms。
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