被动式防孤岛保护装置设计  

Design of Passive Anti-island Protection Device

作　　者：洪广焦 HONG Guangjiao(CHINT Eelectric.,Ltd.,Shanghai 201600,China)

机构地区：[1]正泰电气股份有限公司,上海201600

出　　处：《电工技术》2020年第16期52-54,共3页Electric Engineering

摘　　要：针对目前光伏发电存在的孤岛现象,设计了一种被动式防孤岛保护装置。通过软硬混合测频策略,提高了频率测量准确度,解决了传统频率保护在逆变器启动时容易误动的难题;采用双串口通信方式,实现全双工数据交互,提高抗干扰能力;设计了一种滑窗采样方法,满足交直流开关量检测需求,简化硬件电路。Aiming at the island phenomenon of photovoltaic power generation,a passive anti-island protection device was designed.The accuracy of frequency measurement was improved through the strategy of soft-hard hybrid frequency measurement,which solved the problem that the traditional frequency protection was easy to misoperate when the inverters started up.The dual serial communication mode was adopted to realize full-duplex data interaction and improved the anti-interference ability.A sliding window sampling method was designed to meet the requirements of AC/DC switching detection and the hardware circuit was simplified.

关 键 词：双串口 开关量 防孤岛 过零点测频 滑窗 

分 类 号：TM61[电气工程—电力系统及自动化]