全部 标题 作者
关键词 摘要

OALib Journal期刊
ISSN: 2333-9721
费用:99美元

查看量下载量

相关文章

更多...

微网逆变器的不平衡电压补偿策略

DOI: 10.13334/j.0258-8013.pcsee.2015.19.013, PP. 4956-4964

Keywords: 微电网,负序,不平衡电压,dq同步旋转坐标系,静止坐标系,虚拟阻抗

Full-Text   Cite this paper   Add to My Lib

Abstract:

对于孤岛模式下运行的三相微电网系统,不平衡负载的应用不仅导致负序电流的无序分配,而且将引起微电网母线电压的不平衡。为了补偿母线不平衡电压,提高负载电流分配效果,提出一种逆变器电压控制策略。首先推导同步旋转坐标下控制器到静止坐标系的通用等效变换表达式,接着分析整个闭环控制系统的频域特性。由于所提电压控制策略中基波正负序电压控制支路相互之间独立解耦,因此可简化虚拟阻抗的设计,在不需要正负序分量分离的前提下,可分别引入虚拟复合阻抗来控制逆变器的基波正负序输出阻抗,通过引入正序虚拟阻抗来改善感性线路阻抗环境下的逆变器基波正序功率分配效果,通过引入负序虚拟阻抗来补偿负序电流在线路阻抗上的电压降落,改善微电网电压的不平衡度,同时减小负序环流。最后通过仿真和实验结果验证了所提方法的正确性和有效性。

References

[1]  王成山,李鹏.分布式发电、微网与智能配电网的发展与挑战[J].电力系统自动化,2010,34(2):10-16.Wang Chengshan,Li Peng.Development and challenges of distributed generation,the micro-grid and smart distribution system[J].Automation of Electric Power Systems,2010,34(2):10-16(in Chinese).
[2]  王成山,王守相.分布式发电供能系统若干问题研究[J].电力系统自动化,2008,32(20):1-4.Wang Chengshan,Wang Shouxiang.Study on some key problems related to distributed generation systems [J].Automation of Electric Power Systems,2010,32(20):1-4(in Chinese).
[3]  Rocabert J,Luna A,Blaabjerg F,et al.Control of power converters in ac microgrids[J].IEEE Trans. on Power Electronics,2012,27(11):4734-4749.
[4]  马添翼,金新民,梁建钢.孤岛模式微电网变流器的复合式虚拟阻抗控制策略[J].电工技术学报,2013,28(12):304-312.Ma Tianyi,Jin Xinmin,Liang Jiangang.Multiple virtual impedance control method of micro-grid converter under island mode[J].Transactions of China Electrotechnical Society,2013,28(12):304-312(in Chinese).
[5]  Savaghebi M,Jalilian A,Vasquez J C,et al.Autonomous voltage unbalance compensation in an islanded droop- controlled microgrid[J].IEEE Transactions on Industrial Electronics,2013,60(4):1390-1402.
[6]  杨新法,苏剑,吕志鹏,等.微电网技术综述[J].中国电机工程学报,2014,34(1):57-70.Yang Xjnfa,Su Jian,Lü Zhipeng,et al.Overview on Micro-grid technology[J].Proceedings of the CSEE,2014,34(1):57-70(in Chinese).
[7]  朱永强,王腾飞.应用于DSTATCOM的负序电流优先补偿策略[J].电网技术,2012,36(8):106-110.Zhu Yongqiang,Wang Tengfei.A negative sequence current preferred compensation strategy applied in DSTATCOM[J].Power System Technology,2012,36(8):106-110(in Chinese).
[8]  魏学良,戴柯,谢斌,等.不平衡负载下并联有源电力滤波器的控制策略[J].中国电机工程学报,2008,28(24):64-69.Wei Xueliang,Dai Ke,Xie Bin,et al.Control scheme for three-phase three-wire shunt active power filter with unbalanced loads[J].Proceedings of the CSEE,2008,28(24):64-69(in Chinese).
[9]  熊桥坡,罗安,马伏军,等.考虑负序补偿的角型链式SVG指令电流提取方法[J].中国电机工程学报,2013,33(27):12-19.Xiong Qiaopo,Luo An,Ma Fujun,et al.A reference current detection method of Delta-connected cascaded SVG considering unbalance compensation[J].Proceedings of the CSEE,2013,33(27):12-19(in Chinese).
[10]  He Jinwei,Li Yunwei.Hybrid voltage and current control approach for DG-Grid interfacing converters with LCL filters[J].IEEE Transactions on Industrial Electronics,2013,60(5):1797-1809
[11]  王晓,罗安,邓才波,等.基于光伏并网的电能质量控制系统[J].电网技术,2012,36(4):69-73.Wang Xiao,Luo An,Deng Caibo,et al.A power quality control system based on grid-connected photovoltaic power generation[J].Power System Technology,2012,36(4):69-73(in Chinese).
[12]  陈燕东,罗安,谢三军,等.一种无延时的单相光伏并网功率控制方法[J].中国电机工程学报,2012,32(25):118-125.Chen Yangdong,Luo An,Xie Sanjun,et al.A single-phase photovoltaic grid-connected power control method without delay[J].Proceedings of the CSEE,2012,32(25):118-125(in Chinese).
[13]  He Jinwei,Li Yunwei,Md Shirajum.A flexible harmonic control approach through voltage-controlled DG-Grid interfacing converters[J].IEEE Transactions on Industrial Electronics,2012,59(1):444-455.
[14]  Cheng Potai,Chen Chienan,Lee Tzunglin,et al.A cooperative imbalance compensation method for Distributed-Generation interface converters[J].IEEE Transactions on Industrial Applications,2009,45(2):805-815.
[15]  周洁,罗安,陈燕东,等.低压微电网多逆变器并联下的电压不平衡补偿方法[J].电网技术,2014,38(2):412-418.Zhou Jie,Luo An,Chen Yandong,et al.Voltage unbalance compensation for Low-Voltage microgrid with multi parallely connected inverters[J].Power System Technology,2014,38(2):412-418(in Chinese).
[16]  Hamzeh M,Karimi H,Mokhtari H.A new control strategy for a Multi-Bus MV microgrid under unbalanced conditions[J].IEEE Transactions on Power Systems,2012,27(4):2225-2232.
[17]  Wang Xiaofei,Blaabjerg F,Chen Zhe.Autonomous control of Inverter-Interfaced distributed generation units for harmonic current filtering and resonance damping in an islanded microgrid[J].IEEE Transactions on Industrial Applications,2014,50(1):452-461.
[18]  Song H S ,Nam K.Dual current control scheme for PWM converter under unbalanced input voltage conditions[J].IEEE Transactions on Industrial Electronics,1999,46(5):953-959.
[19]  Zou Changyue,Liu Bangyin,Duan Shanxu,et al.Stationary frame equivalent model of Proportional- Integral controller in dq synchronous frame[J] IEEE Transactions on Power Electronics,2014,29(9):4461-4465.
[20]  Guerrero J M,Matas J,Vicuna L G de,et al.Decentralized control for parallel operation of distributed generation inverters using resistive output impedance[J].IEEE Transactions on Industrial Electronics,2007,54(2):994-1004.

Full-Text

Contact Us

service@oalib.com

QQ:3279437679

WhatsApp +8615387084133