摘要
针对逆变器输出功率和负载功率平衡无法检测出孤岛运行的特殊现象,提出一种新型低压反孤岛保护策略,通过控制自适应可变负载,更快速、准确地破坏分布式光伏发电孤岛运行条件,实现孤岛切除。试验验证了该方案既能弥补被动式检测盲区,又能去除操作过电压的隐患,同时还能消除开关频繁带来的问题,增加了主动性,提高了精确性,增强了实用性。
According to the balance phenomenon of the output power of the inverter and the load power which can＇t detect the island, a new type of low voltage anti-islanding protection strategy is put forward.Through controlling adap- tive variable load, the new device can destruct the islanding operation of distributed photovoltaic power generation conditions more quickly and accurately and remove the island.The new method can make up for the test of the pas- sive detection blind area and eliminates the switching overvohage problems.Meanwhile it also eliminates the switching frequency operation problems.Test results are that the initiative is increased and the accuracy and practice are improved.
出处
《电力电子技术》
CSCD
北大核心
2015年第12期35-38,共4页
Power Electronics
基金
芜湖市科技计划重点项目(2014cxy05)
安徽高校自然科学研究重大项目(KJ2015ZD06)~~
关键词
分布式发电
反孤岛保护
自适应可变负载
distributed generation
anti-islanding protection
adaptive variable load
