Journal of Dalian Maritime University >
2015 , Vol. 41 >Issue 3: 115 - 123
DOI: https://doi.org/10.16411/j.cnki.issn1006-7736.2015.03.021
Parallel operation for the micro-source inverters based on adaptive sliding-mode and droop controls
Received date: 2014-08-28
Revised date: 2014-10-27
Online published: 2014-10-27
To solve load disturbance and power sharing accuracy problems of parallel micro-source inverters, a new three-loop control strategy based on the combined three-phase four-wire inverter topology was conducted. And the control strategy was composed of the sliding-mode voltage inner loop, virtual output impedance loop and power outer loop. The adaptive robust three-order sliding-mode control was used in the voltage inner loop to improve the dynamic characteristic and disturbance rejection performance. On the basis of analyzing the inverter equivalent output impedance of sliding-mode voltage inner loop, the effect of the output impedance and line impedance on power sharing was analyzed, and the virtual impedance feedback gains were designed for the inverters with different power ratings, so the equivalent output impedances of inverters can be resistive and meet the requirements of power sharing.Finally, the transient droop terms were added into the conventional power outer loop to eliminate the low frequency oscillation and improve the dynamic response. Simulation analysis and single-phase experiment results varified the effectiveness and robustness of the proposed control strategy.
ZHANG Qin-jin , LIU Yan-cheng , WANG Chuan , NING Wang . Parallel operation for the micro-source inverters based on adaptive sliding-mode and droop controls[J]. Journal of Dalian Maritime University, 2015 , 41(3) : 115 -123 . DOI: 10.16411/j.cnki.issn1006-7736.2015.03.021
［1］NIKKHAJOEI H, LASSETER R H. Distributed generation interface to the certs microgrid［J］. IEEE Transactions on Power Delivery, 2009, 24(3): 1598-1608.
［2］王成山, 武震, 李鹏. 微电网关键技术研究［J］. 电工技术学报, 2014, 29(2): 1-12.
WANG Cheng-shan, WU Zhen, LI Peng. Research on key technologies of microgrid［J］. Transactions of China Electrotechnical Society, 2014, 29(2): 1-12.(in Chinese)
［3］ 赵冬梅, 张楠, 刘燕华, 等. 基于储能的微网并网和孤岛运行模式平滑切换综合控制策略［J］. 电网技术, 2013, 37(2): 301-306.
ZHAO Dong-mei, ZHANG Nan, LIU Yan-hua, et al. Synthetical control strategy for smooth switching between grid-connected and islanded operation modes of microgrid based on energy storage system［J］. Power System Technology, 2013, 37(2): 301-306.(in Chinese)
［4］MAJUMDER R. Some aspects of stability in microgrids［J］. IEEE Transactions on Power Systems, 2013, 28(3): 3243 -3252.
［5］ZHAO Bo, ZHANG Xue-song, CHEN Jian. Integrated microgrid laboratory system［J］.IEEE Transactions on Power Systems, 2012, 27(4): 2175-2185.
［6］高晓芝, 李林川, 张蕾. 含电压源型逆变器和同步电机接口的微网控制［J］. 电力系统保护与控制, 2012, 40(23): 145-150.
GAO Xiao-zhi, LI Lin-chuan, ZHANG Lei. Microgrid control with voltage source inverter interface and synchronous generator interface［J］.Power System Protection and Control, 2012, 40(23): 145-150.(in Chinese)
［7］WANG Cheng-shan, LI Yan, PENG Ke, et al. Coordinated optimal design of inverter controllers in a micro-grid with multiple distributed generation units［J］. IEEE Transactions on Power Systems, 2013, 28(3): 2679-2687.
［8］王旭斌, 李鹏. 微网孤岛运行模式下的新型负荷分配控制策略［J］. 电网技术, 2014, 38(1): 181-187.
WANG Xu-bin, LI Peng. A novel load distribution and control strategy for microgrid in autonomous operating mode［J］.Power System Technology,2014,38(1): 181-187.(in Chinese)
［9］ 苏虎, 曹炜, 孙静, 等. 基于改进下垂控制的微网协调控制策略［J］. 电力系统保护与控制, 2014, 42(11): 94-98.
SU Hu, CAO Wei, SUN Jing, et al. Micro-grid coordinated control strategy based on improved droop control［J］. Power System Protection and Control, 2014,42(11):94-98.(in Chinese)
［10］荆龙, 黄杏, 吴学智. 改进型微源下垂控制策略研究［J］. 电工技术学报, 2014, 29(2): 145-152.
JING Long, HUANG Xing, WU Xue-zhi. Research on improved microsource droop control method［J］. Transactions of China Electrotechnical Society, 2014, 29(2): 145-152.(in Chinese)
［11］张平, 石健将, 李荣贵, 等. 低压微网逆变器的“虚拟负阻抗”控制策略［J］. 中国电机工程学报, 2014, 34(12): 1844-1852.
ZHANG Ping, SHI Jian-jiang, LI Rong-gui, et al. A control strategy of ‘virtual negative’ impedance for inverters in low-voltage microgrid［J］. Proceedings of the CSEE, 2014, 34(12): 1844-1852.(in Chinese)
［12］张明锐, 杜志超, 王少波. 微网中下垂控制策略及参数选择研究［J］. 电工技术学报, 2014, 29(2): 136-144.
ZHANG Ming-rui, DU Zhi-chao, WANG Shao-bo. Research on droop control strategy and parameters［J］. Transactions of China Electrotechnical Society, 2014, 29(2): 136-144.(in Chinese)
［13］吕志鹏, 苏剑, 李蕊, 等. 不同功率等级微源逆变器并联控制新方法［J］. 电工技术学报, 2013, 28(7): 191-198.
LV Zhi-peng, SU Jian, LI Rui, et al. New power control strategy on paralleled micro-source inverters with different power levels［J］. Transactions of China Electrotechnical Society, 2013, 28(7): 191-198.(in Chinese)
［14］GUERRERO J M, MATAS J, VICUNA L G, 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.
［15］De D, RAMANARAYANAN V. Decentralized parallel operation of inverters sharing unbalanced and nonlinear loads［J］. IEEE Transactions on Power Electronics, 2010, 25(12): 3015-3025.
［16］MOHAMED Y A I, ZEINELDIN H H, SALAMA M M A, et al. Seamless formation and robust control of distributed generation microgrids via direct voltage control and optimized dynamic power sharing［J］. IEEE Transactions on Power Electronics, 2012, 27(3): 1283-1294.
［17］李立, 黄松柏, 汪洪亮. 基于电压/电流控制模式的组合式三相逆变器［J］. 电机与控制学报, 2011, 15(2): 63-70.
LI Li, HUANG Song-bai, WANG Hong-liang. Combined three-phase inverter operating in voltage or current control mode［J］. Electric Machines and Control, 2011, 15(2):63-70.(in Chinese)
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