SVG机间谐波交互对子模块直流电压的影响分析与抑制方法Analysis of Influence of Harmonic Interaction Between SVGs on Sub-module DC Voltage and Suppression Method
陈继开;王鹏;徐永海;姜齐荣;李国庆;
摘要(Abstract):
为确保风电区域网内动态无功合理分布和电压达标,大量静止无功发生器(static var generator,SVG)被接入风场和风场汇流站,但由于SVG机间交互作用导致的设备负交互问题也开始显现。针对此类问题,首先分析H桥级联型SVG双机拓扑结构,针对双机载波异步条件下产生的机间高次谐波电压差进行数学推导,研究高次谐波环流对SVG内H桥子模块电容直流电压动态稳定性的影响。通过对各H桥子模块电容吸收有功功率差异的推导分析,发现非特征谐波与H桥子模块直流电压失衡之间的内在联系,指出当谐波环流导致非特征次谐波越限时,将会引发各H桥模块直流电压不平衡,并且提出一种直流电压均衡控制策略来解决SVG直流电压失衡的问题,实现各H桥子模块直流电压稳定,最后通过仿真验证了理论分析和所提控制策略的正确性。
关键词(KeyWords): SVG;非特征次谐波;谐波交互;直流电压失衡;抑制方法
基金项目(Foundation): 吉林省发改委技术研究开发项目(2019C058-6);; 吉林省科技厅国际科技合作项目(20190701014GH)~~
作者(Author): 陈继开;王鹏;徐永海;姜齐荣;李国庆;
Email:
DOI: 10.13335/j.1000-3673.pst.2019.1226
参考文献(References):
- [1] Alsumiri Mohammed,Li Liuying,Jiang Lin,et al.Residue theorem based soft sliding mode control for wind power generation systems[J].Protection and Control of Modern Power Systems,2018,3(1):1-12.
- [2]刘扬,唐飞,施浩波,等.一种考虑风电场并网的电力系统在线同调识别策略[J].电网技术,2019,43(4):1236-1245.Liu Yang,Tang Fei,Shi Haobo,et al.An online coherency identification strategy for power system considering wind farm integration[J].Power System Technology,2019,43(4):1236-1245(in Chinese).
- [3]张哲原,李凌,丁苏阳,等.风电场柔性并网辅助系统及其优化模型[J].电网技术,2019,43(4):1120-1127.Zhang Zheyuan,Li Ling,Ding Suyang,et al.Modeling and operation strategy research on flexible wind farm grid-connection auxiliary system[J].Power System Technology,2019,43(4):1120-1127(in Chinese).
- [4] Muyeen S M.A combined approach of using an SDBR and a STATCOM to enhance the stability of a wind farm[J].IEEE Systems Journal,2015,9(3):922-932.
- [5] Moharana A,Rajiv K,Ravi S.SSR alleviation by STATCOM in Induction-Generator-Based wind farm connected to series compensated line[J].IEEE Transactions on Sustainable Energy,2014,5(3):947-957.
- [6]胡应宏,邓春,王劲松,等.变流器并列运行系统中非特征谐波环流分析及其抑制方法[J].电网技术,2016,40(7):2169-2174.Hu Yinghong,Deng Chun,Wang Jinsong,et al.Analysis on non-characteristic harmonic circulating current in parallel inverter system and its suppression measures[J].Power System Technology,2016,40(7):2169-2174(in Chinese).
- [7] Zhang S,Jiang S,Lu X,et al.Resonance issues and damping techniques for grid-connected inverters with long transmission cable[J].IEEE Transactions Power Electron,2014,29(1):110-120.
- [8] Bai Z H,Ma H,Xu D,et al.Resonance damping and harmonic suppression for grid-connected current-source converter[J]. IEEE Transactions on Industrial Electronics,2014,61(7):3146-3154.
- [9] Lu M H, Blaabjerg F, Wang X F. Resonance interaction of multi-parallel grid-connected inverters with LCL filter[J]. IEEE Transactions Power Electron,2017,32(2):894-899.
- [10]胡伟,孙建军,马谦,等.多个并网逆变器间的交互影响分析[J].电网技术,2014,38(9):2511-2518.Hu Wei,Sun Jianjun,Ma Qian,et al.Analysis on interactive influences among multi grid-connected inverters[J].Power System Technology,2014,38(9):2511-2518(in Chinese).
- [11] Kwon J B,Wang X F,Blaabjerg F,et al.Harmonic interaction analysis in a grid-connected converter using harmonic state-space(HSS)modeling[J].IEEE Transactions on Power Electronics,2017,32(9):6823-6835.
- [12] Yang D S,Wang X F,Blaabjerg F.Sideband harmonic instability of paralleled inverters with asynchronous carriers[J].IEEE Transactions on Power Electronics,2018,33(6):4571-4577.
- [13] Huang M,Cheng W,Chi K,et al.Effects of interaction of power converters coupled via power grid:A design-oriented study[J].IEEE Transactions on Power Electronics,2015,30(7):3589-3600.
- [14] Behrouzian E,Bongiorno M,Teodorescu R.Impact of switching harmonics on capacitor cells balancing in phase-shifted PWM-based cascaded H-bridge STATCOM[J]. IEEE Transactions on Power Electronics,2017,32(1):815-824.
- [15]姜卫东,汪磊,马炜程,等.一种电流跟踪误差补偿的三相有源电力滤波器的无差拍控制方法[J].中国电机工程学报,2016,36(20):5605-5615.Jiang Weidong,Wang Lei,Ma Weicheng,et al.A control based on current tracking error compensation of deadbeat control for a three-phase active power filter[J].Proceedings of the CSEE,2016,36(20):5605-5615(in Chinese).
- [16]葛帅.基于模糊控制的有源滤波器直流母线电压控制[J].电子科技,2013,26(6):25-27.Ge Shuai.Hybrid active power filter DC bus control based on dual fuzzy control[J].Electronic Science and Technology,2013,26(6):25-27(in Chinese).
- [17] He Y J,Duan W Y,Fu Y B.Research on DC voltage balancing control method of star connection cascaded H-bridge static var generator[J].IET Power Electronics,2016,9(7):1505-1512.
- [18]何英杰,付亚斌,段文岩.一种星接H桥级联型SVG直流侧电压均衡控制方法研究[J].电工技术学报,2016,31(11):13-21.He YingJie,Fu Yabin,Duan Wenyan.Research on DC voltage balancing control method of star connection cascaded H bridge static var generator[J].Transactions of China Electrotechnical Society,2016,31(11):13-21(in Chinese).
- [19]靳艳,黄晶晶,同向前,等.基于级联STATCOM的CPS-SPWM脉冲相移技术[J].电力系统保护与控制,2015,43(14):120-125.Jin Yan,Huang Jingjing,Tong Xiangqian,et al.Pulse phase shifting technology of CPS-SPWM for cascaded STATCOM[J]. Power System Protection and Control,2015,43(14):120-125(in Chinese).
- [20]张兴,余畅舟,刘芳,等.光伏并网多逆变器并联建模及谐振分析[J].中国电机工程学报,2014,34(3):336-345.Zhang Xing,Yu Changzhou,Liu Fang,et al.Modeling and resonance analysis of muti-paralleled grid-tied inverters in PV systems[J].Proceedings of the CSEE,2014,34(3):336-345(in Chinese).