摘要
为了提高光伏并网逆变器的防孤岛测试水平、有效地解决传统RLC负载测试条件的限制,提出实时功率匹配的三相四线制背靠背结构电力电子防孤岛保护策略,并研制了30 k W防孤岛保护测试装置,装置输入侧模拟交流电压源实现光伏并网逆变器与测试装置在有功功率、无功功率的高精度匹配,输出侧将从输入侧吸收的有功功率高效逆变反馈给电网。该控制算法采用自适应模糊比例积分(PI)控制。将该装置与传统RLC负载防孤岛测试进行防孤岛性能对比,实验结果证明电力电子防孤岛保护测试装置响应速度快、测试精度高、操作便捷、不受外部环境影响。
In order to improve the anti-islanding level of photovoltaic grid-connected inverter and solve the limitation of traditional RLC load test conditions effectively, a strategy for three-phase four-wire back-to-back electronic anti- islanding protection is proposed with real-time power matching, and a 30 kW electronic anti-islanding protection test device is developed. The input side of the device simulates AC voltage source to realize high accuracy matching of active power and reactive power between photovohaic grid-connected inverter and the test device. The output side of the device feedbacks the active power absorbed from the input side to the power grid efficiently. Adaptive fuzzy PI control is used in the control algorithm. Compared with the traditional RLC load anti-islanding test, experimental re- sults show that the designed electronic anti-islanding protection test device has the advantages of fast response, high test precision, convenient operation, and is not affected by the external environment.
作者
徐在德
范瑞祥
章辉
黄新
李晓龙
刘心悦
XU Zaide1 , FAN Ruixiang1 , ZHANG Hui2, HUANG Xin3, LI Xiaolong4, LIU Xinyue5(1. State Grid Jiangxi Electric Power Research Institute, Nanehang 330096, China;2. Jiangsu Tongxin Electric Technology Co. ,Ltd.,Nanjing 210000, China;3. State Grid Jiangxi Electric Power Company Yiehun Power Supply Braneh,Yichun 336000, China;4 State Grid Shandong Electric Power Company Jining Power Supply Braneh,Jining 272000,China; 5. College of Electrical and Information Engineering, Lanzhou University of Technology, Lanzhou 730050, Chin)
出处
《电力自动化设备》
EI
CSCD
北大核心
2018年第4期139-144,共6页
Electric Power Automation Equipment
关键词
光伏并网逆变器
电子防孤岛保护
三相四线制
逆变器
RLC负载
photovoltaic grid-connected inverter
electronic anti-islanding protection
three-phase four-wire system
electric inverters
RLC load
