基于MPPT梯形电压扰动的直流微电网新型孤岛检测方法Novel Islanding Detection for DC Microgrid Based on MPPT Trapezoidal Voltage Disturbance
陈晓龙;杨志颖;李永丽;李斌;李博通;
摘要(Abstract):
提出了一种基于最大功率跟踪策略(maximum power point tracking,MPPT)施加梯形电压扰动的、适用于含有多个光伏发电系统的直流微电网孤岛检测方法,该方法通过检测并网点电压的变化特性是否符合孤岛情况下的理论分析结果来识别孤岛。首先,根据局部区域微电网内不同光伏阵列(photovoltaic array,PVA)所受光照强度和温度均相同的特点,推导了不同PVA输出电流之间的关系,进而提出了基于环境系数的扰动同步性策略。然后,提出了PVA在端口电压恒定以及变化时分别对应的静态等值电路以及动态等值电路,能够准确反映PVA在不同电压扰动时段的功率变化特性。最后,提出了基于梯形电压扰动的孤岛检测方法,深入挖掘了梯形电压扰动蕴含的冗余判据,提高了孤岛检测的准确性,并利用PSCAD/EMTDC仿真软件验证了所提方法的有效性。
关键词(KeyWords): 孤岛检测;光伏阵列;直流微电网;电压扰动
基金项目(Foundation): 国家自然科学基金青年基金资助项目(51707131)~~
作者(Author): 陈晓龙;杨志颖;李永丽;李斌;李博通;
Email:
DOI: 10.13335/j.1000-3673.pst.2020.0741
参考文献(References):
- [1]孙丰杰,谢宁,王承民,等.2017年国际供电会议配电系统规划研究成果综述[J].电网技术,2018,42(9):2733-2741.Sun Fengjie,Xie Ning,Wang Chengmin,et al.Review of CIRED2017 on power distribution system planning[J].Power System Technology,2018,42(9):2733-2741(in Chinese).
- [2]顾一丰,邱稳斌,李艳君,等.基于虚拟阻抗和锁相环的孤岛检测技术[J].电力系统保护与控制,2018,46(21):78-85.Gu Yifeng,Qiu Wenbin,Li Yanjun,et al.An islanding detection based on virtual impedance and phase-locked loop[J].Power System Protection and Control,2018,46(21):78-85(in Chinese).
- [3]IEEE.IEEE Std.1547-2018.IEEE standard for interconnection and interoperability of distributed energy resources with associated electric power systems interfaces[S].IEEE,2018.
- [4]刘新天,冯嘉骏,何耀,等.基于闭环锁频控制的并网逆变器孤岛检测方法[J].电力系统自动化,2017,41(23):116-123.Liu Xintian,Feng Jiajun,He Yao,et al.Island detection method based on closed-loop frequency-locked control for grid-connected inverters[J].Automation of Electric Power Systems,2017,41(23):116-123(in Chinese).
- [5]杨珮鑫,张沛超.分布式电源并网保护研究综述[J].电网技术,2016,40(6):1888-1895.Yang Peixin,Zhang Peichao.A survey on interconnection protection of distributed resource[J].Power System Technology,2016,40(6):1888-1895(in Chinese).
- [6]丁浩,魏艳君,漆汉宏,等.基于自适应有功电流扰动的孤岛检测[J].电工技术学报,2014,29(8):294-300.Ding Hao,Wei Yanjun,Qi Hanhong,et al.A novel islanding detection based on adaptive active current disturbance[J].Transactions of China Electrotechnical Society,2014,29(8):294-300(in Chinese).
- [7]Samui A,Sanmantaray S R.New active islanding detection scheme for constant power and constant current controlled inverter-based distributed generation[J].IET Generation,Transmission&Distribution,2013,7(7):779-789.
- [8]唐忠,朱瑞婷,张合栋,等.基于无功电流扰动的孤岛与扰动辨识的研究[J].电力系统保护与控制,2016,44(22):159-165.Tang Zhong,Zhu Ruiting,Zhang Hedong,et al.Identification research of the island and the disturbance based on reactive current disturbance[J].Power System Protection and Control,2016,44(22):159-165(in Chinese).
- [9]沈虹,周文飞,王怀宝,等.基于无功电流控制的并网逆变器孤岛检测[J].电工技术学报,2017,32(16):294-300.Shen Hong,Zhou Wenfei,Wang Huaibao,et al.Islanding detection for grid-connected inverter based on reactive current control[J].Transactions of China Electrotechnical Society,2017,32(16):294-300(in Chinese).
- [10]Park S,Kwon M,Choi S.Reactive power P&O anti-islanding method for a grid connected inverter with critical load[J].IEEE Transactions on Power Electronics,2019,34(1):204-212.
- [11]邹培源,黄纯.基于模糊控制的改进滑模频率偏移孤岛检测方法[J].电网技术,2017,41(2):574-580.Zou Peiyuan,Huang Chun.An improved slip mode frequency shift islanding detection method based on fuzzy control[J].Power System Technology,2017,41(2):574-580(in Chinese).
- [12]Malakondailah M,Boddeti K K,Naidu B R,et al.Second harmonic impedance drift-based islanding detection method[J].IET Generation,Transmission&Distribution,2019,13(23):5313-5324.
- [13]陈巧地,张兴,李明,等.基于阻抗辨识的下垂控制并网逆变器孤岛检测方法[J].电力系统自动化,2020,44(7):123-129.Chen Qiaodi,Zhang Xing,Li Ming,et al.Impedance identification based islanding detection method for grid-connected inverter with droop control[J].Automation of Electric Power Systems,2020,44(7):123-129(in Chinese).
- [14]崇志强,戴志辉,焦彦军.基于负序电流注入的光伏并网逆变器孤岛检测方法[J].电力系统保护与控制,2014,42(24):65-71.Chong Zhiqiang,Dai Zhihui,Jiao Yanjun.Islanding detection method based on grid-connected photovoltaic converter and negative sequence current injection[J].Power System Protection and Control,2014,42(24):65-71(in Chinese).
- [15]王雪,雷胜华,胡文平,等.基于自适应负序电压正反馈的孤岛检测方法[J].电力自动化设备,2016,36(12):36-42.Wang Xue,Lei Shenghua,Hu Wenping,et al.Islanding detection based on adaptive positive feedback of negative-sequence voltage[J].Electric Power Automation Equipment,2016,36(12):36-42(in Chinese).
- [16]Song W W,Chen Y F,Wen A,et al.Detection and switching control scheme of unintentional islanding for“hand-in-hand”DC distribution network[J].IET Generation,Transmission&Distribution,2019,13(8):1414-1422.
- [17]Papadimitriou C N,Kleftakis V A,Hatziargyriou N D.A novel method for islanding detection in DC networks[J].IEEE Transactions on Sustainable Energy,2017,8(1):441-448.
- [18]Seo G S,Lee K C,Cho B H.A new DC anti-islanding technique of electrolytic capacitor-less photovoltaic interface in DC distribution systems[J].IEEE Transactions on Power Electronics,2013,28(4):1632-1641.
- [19]贾科,朱正轩,方煜,等.基于谐波阻抗量测得多端口光伏直流配电网孤岛检测法[J].电网技术,2019,44(4):1229-1238.Jia Ke,Zhu Zhengxuan,Fang Yu,et al.Islanding detection method of multi-port photovoltaic DC distribution network based on harmonic impedance measurement[J].Power System Technology,2019,44(4):1229-1238(in Chinese).
- [20]吴志程,江智军,杨晓辉.一种基于功率闭环控制的改进全局MPPT方法[J].电力系统保护与控制,2018,46(1):57-62.Wu Zhicheng,Jiang Zhijun,Yang Xiaohui.An improved global MPPT method based on power closed-loop control[J].Power System Protection and Control,2018,46(1):57-62(in Chinese).
- [21]张晓娜,高德东,刘海雄,等.一种新型光伏阵列多传感器故障检测定位方法[J].可再生能源,2016,34(2):166-172.Zhang Xiaona,Gao Dedong,Liu Haixiong,et al.A noval method for multi-sensor fault detection and positioning of photovoltaic array[J].Renewable Energy Resources,2016,34(2):166-172(in Chinese).
- [22]潘学萍,张源,鞠平,等.太阳能光伏电站等效建模[J].电网技术,2015,39(5):1173-1178.Pan Xueping,Zhang Yuan,Ju Ping,et al.Equivalent modeling for photovoltaic power station[J].Power System Technology,2015,39(5):1173-1178(in Chinese).
- [23]闫凯,张保会,瞿继平,等.光伏发电系统暂态建模与等值[J].电力系统保护与控制,2015,43(1):1-8.Yan Kai,Zhang Baohui,Qu Jiping,et al.Photovoltaic power system transient modeling and equivalents[J].Power System Protection and Control,2015,43(1):1-8(in Chinese).