基于非线性扰动观测器的光伏并网逆变器直流侧母线电压控制DC-bus Voltage Control for PV Grid-connected Inverter Based on Nonlinear Disturbance Observer
刘鑫蕊;高超;王智良;
摘要(Abstract):
光伏并网发电系统中,当光伏板输出功率突变时,直流侧母线电压波动幅度较大,若控制不当,将直接影响系统的正常工作。为提高母线电压的控制性能,提出一种基于非线性扰动观测器的直接功率控制方法。该方法无需增加额外的传感器,利用扰动观测器,对光伏板输出功率进行实时观测,并将其作为前馈量加入到功率内环,使功率内环给定含有输入功率信息。针对功率内环,重新定义了控制输入量,省去了同步旋转坐标变换环节。详细介绍了观测器及功率内环的设计过程,并给出内外环参数整定方法。最后通过仿真验证了所提方法的正确性和有效性。
关键词(KeyWords): 光伏并网逆变器;直流侧母线电压;非线性扰动观测器;直接功率控制;前馈;双闭环
基金项目(Foundation): 国家自然科学基金资助项目(61573094,61703289)~~
作者(Author): 刘鑫蕊;高超;王智良;
Email:
DOI: 10.13335/j.1000-3673.pst.2019.0223
参考文献(References):
- [1] Liao C Y,Lin W S,Chen Y M,et al.A pv micro-inverter with PV current decoupling strategy[J]. IEEE Transactions on Power Electronics,2017,32(8):6544-6557.
- [2]董密,罗安.光伏并网发电系统中逆变器的设计与控制方法[J].电力系统自动化,2006,30(20):97-102.Dong Mi,Luo An.Design and control strategies of inverters for a grid-connected photovoltaic power system[J].Automation of Electric Power Systems,2006,30(20):97-102(in Chinese).
- [3] Khajehoddin S A,Karimi-Ghartemani M,et al.A review of the single phase photovoltaic module integrated converter topologies with three different DC link configurations[J].IEEE Transactions on Power Electronics,2013,28(7):3245-3254.
- [4] Wang Chengshan, Li Xialin, Guo Li, et al. A nonlineardisturbance-observer-based DC-Bus voltage control for a hybrid AC/DC microgrid[J].IEEE Transactions on Power Electronics,2014,29(11):6162-6177.
- [5] Blaabjerg F,Teodorescu R,et al.Overview of control and grid synchronization for distributed power generation systems[J].IEEE Transactions on Industrial Electronics,2006,53(5):1398-1409.
- [6] Zargari N R, Joos G. Performance investigation of a current-controlled voltage-regulated PWM rectifier in rotating and stationary frames[J].IEEE Transactions on Industrial Electronics,1995,42(4):396-401.
- [7] Timbus A,Liserre M,Teodorescu R,et al.Evaluation of current controllers for distributed power generation systems[J]. IEEE Transactions on Power Electronics,2009,24(3):654-664.
- [8] Noguchi T,Tomiki H,Kondo S,et al.Direct power control of PWM converter without power source voltage sensors[J].IEEE Transactions on Industry Applications,1998,34(6):473-479.
- [9] Zhang Yongchang,Qu Changqi.Direct power control of a pulse width modulation rectifier using space vector modulation under unbalanced grid voltages[J].IEEE Transactions on Power Electronics,2015,30(10):5892-5901.
- [10] Gui Yonghao,Li Mingshen,Lu Jinghang,et al.A voltage modulated dpc approach for three-phase pwm rectifier[J].IEEE Transactions on Industrial Electronics,2018,65(10):7612-7619.
- [11] Gui Yonghao,Kim Chunghun,Chung C C,et al.Improved direct power control for grid-connected voltage source converters[J].IEEE Transactions on Industrial Electronics,2018,65(10):8041-8051.
- [12]梁营玉.不对称电网电压下VSC-HVDC模型预测直接功率控制[J].电网技术,2017,41(8):2455-2461.Liang Yingyu. A model predictive direct power control for VSC-HVDC under unbalanced grid voltages[J]. Power System Technology,2017,41(8):2455-2461(in Chinese).
- [13]杨卫朋,张爱民,李俊刚,等.电压不平衡条件下VSC-MVDC系统PID加谐振滑模直接功率控制[J].电网技术,2018,42(8):2399-2407.Yang Weipeng,Zhang Aimin,Li Jungang,et al.PID plus resonant sliding mode direct power control for VSC-MVDC system under unbalanced grid voltage conditions[J].Power System Technology,2018,42(8):2399-2407(in Chinese).
- [14] Yao Jun,Li Hui,Liao Yong,et al.An improved control strategy of limiting the DC-link voltage fluctuation for a doubly fed induction wind generator[J].IEEE Transactions on Power Electronics,2008,23(3):1205-1213.
- [15]姜世公,王卫,王盼宝,等.基于功率前馈的单相光伏并网控制策略[J].电力自动化设备,2010,30(6):16-22.Jiang Shigong,Wang Wei,Wang Panbao,et al.Power feed-forwardbased control strategy of grid-connected single-phase PV system[J].Electric Power Automation Equipment,2010,30(6):16-22(in Chinese).
- [16] Sato A,Noguchi T.Voltage-source PWM rectifier-inverter based on direct power control and its operation characteristics[J]. IEEE Transactions on Power Electronics,2011,26(5):1559-1567.
- [17]沈瑶,罗安,陈燕东,等.基于功率前馈的光伏并网控制方法及稳定性分析[J].电网技术,2014,38(9):2449-2454.Shen Yao,Luo An,Chen Yandong,et al.A power feedforward-based control approach for grid-connection of photovoltaic generation and its stability analysis[J].Power System Technology,2014,38(9):2449-2454(in Chinese).
- [18] Ge Junjie,Zhao Zhengming,Yuan Liqiang,et al.Energy feed-forward and direct feed-forward control for solid-state transformer[J].IEEE Transactions on Power Electronics,2015,30(8):4042-4047.
- [19] Ciobotaru M,Teodorescu R,Blaabjerg F.Control of single-stage single-phase PV inverter[C]//2005 European Conference on Power Electronics and Applications.2005,Dresden,Germany:1-10.
- [20] Karimi-Ghartemani M,Khajehoddin S A,Jain P,et al.A systematic approach to DC-bus control design in single-phase grid-connected renewable converters[J].IEEE Transactions on Power Electronics,2013,28(7):3158-3166.
- [21] Davari M,Mohamed Y A I.Dynamics and robust control of a grid-connected VSC in multiterminal DC grids considering the instantaneous power of DC-and AC-side filters and DC grid uncertainty[J].IEEE Transactions on Power Electronics,2016,31(3):1942-1958.
- [22] Liu Jianxing,Vazquez s,Wu Ligang,Gao Huijun,et al.Extended state observer-based sliding-mode control for three-phase power converters[J].IEEE Transactions on Industrial Electronics,2017,64(1):22-31.
- [23] Lu Jinghang,Golestan s,Savaghebi M,et al.An enhanced state observer for DC-link voltage control of three-phase AC/DC converters[J].IEEE Transactions on Power Electronics,2018,33(2):936-942.
- [24]杨林,曾江,黄仲龙.线性自抗扰技术在LCL逆变器并网电流控制及有源阻尼中的应用[J].电网技术,2019,43(4):1378-1386.Yang Lin,Zeng Jiang,Huang Zhonglong.Application of linear active disturbance rejection technique in grid-connected current control and active damping of LCL type inverter[J].Power System Technology,2019,43(4):1378-1386(in Chinese).
- [25]袁晓冬,楼冠男,陈亮,等.基于线性自抗扰的微电网平滑切换控制策略[J].电网技术,2017,41(12):3824-3831.Yuan Xiaodong,Lou Guannan,Chen Liang,et al.Control strategy for microgrid seamless switching via linear active disturbance rejection[J].Power System Technology,2017,41(12):3824-3831(in Chinese).
- [26]刘思佳,庄圣贤,陈希.光伏并网逆变器的电流扰动观测控制方法研究[J].中国电机工程学报,2014,34(33):5811-5818.Liu Sijia,Zhuang Shengxian,Chen Xi.Research on the control method of current disturbance observers for photovoltaic grid-connected inverters[J].Proceedings of the CSEE,2014,34(33):5811-5818(in Chinese).
- [27] Yang Jun,Li Shihua,Yu Xinghuo.Sliding-mode control for systems with mismatched uncertainties via a disturbance observer[J].IEEE Transactions on Industrial Electronics,2013,60(1):160-169.