摘要
孤岛检测是并网型光伏逆变器接入分布式发电系统的一个重要要求,其性能的优劣直接影响逆变器的安全可靠运行。孤岛检测的性能取决于所采用的孤岛检测策略,而其中参数的合理设置至关重要。分析了抛物线型滑模频移(PSMS)孤岛检测法的工作原理,通过对公共耦合点(PCC)电压频率在电网失压后偏移轨迹的分析,推导出不同参数下PSMS算法孤岛检测的盲区分布,并详细给出了无检测盲区的相关参数的优化过程。最后,通过实验验证了该方法的正确性及可靠性。
An important requirement for the connection of grid-connected photovohaic inverter to the distribution netw- orks is the capability of islanding detection.The advantage and disadvantage of the detection performance directly rel- ate the safe reliable operation of the grid-connected inverter.The performance of islanding detection method is subjected to the adopted strategy and related to the reasonable parameter setting.The mechanism of parabolic slide-mode frequ- ency shift（PSMS） method is analyzed.Based on analysis the frequency deviation in grid disconnected,the relationship between the non-detection zone and different parameters with PSMS method is deduced.The detailed process for para- meter optimization is presented.Finally,the experimental results verify the validity and reliability of the PSMS method.
出处
《电力电子技术》
CSCD
北大核心
2016年第6期51-54,共4页
Power Electronics
基金
高等学校博士学科点专项科研基金(20121333-110007)
河北省应用基础研究计划重点基础研究项目(13964304D)~~
关键词
光伏逆变器
孤岛检测
抛物线型滑膜频移
photovohaic inverter
islanding detection
parabolic slide-mode frequency shift
