ZHANG Chunjiang,XU Jingyuan,QING Hongyang,et al.Seamless Transferring Control Strategy for Master-Slave Microgrid Inverter in Whole Off-grid Process[J].Automation of Electric Power Systems,2022,46(23):125-133.
ZHANG Chunjiang,XU Jingyuan,QING Hongyang,et al.Seamless Transferring Control Strategy for Master-Slave Microgrid Inverter in Whole Off-grid Process[J].Automation of Electric Power Systems,2022,46(23):125-133. DOI: 10.7500/AEPS20210914002.
Seamless Transferring Control Strategy for Master-Slave Microgrid Inverter in Whole Off-grid Process
The master inverter of the master-slave microgrid system generally adopts the
PQ
-
V
/
F
control method. In the case of the unintentional islanding
the transferring from the grid-connected mode to the island mode will lead to the uncontrollable voltage during the islanding detection. To solve the above problem
a combined seamless transferring control method based on the additional current controller and the voltage retainer is proposed. In the grid-connected operation
the additional current loop and the inductor current loop jointly adjust the grid-connected current. In the island operation
the additional current loop exits
and the voltage controller acts as the voltage outer loop to adjust the output voltage with the inductor current inner loop. During the islanding detection
the voltage controller is used as the retainer to maintain the controller output in the island mode. The inverter output voltage is maintained by the additional current controller and the voltage retainer to avoid the voltage violation. Simulation and experimental results verify that the proposed control strategy can achieve seamless transferring of operation modes under the unintentional island condition.
LE Jian , LIAO Xiaobing , ZHANG Yantian , et al . Review and prospect on distributed model predictive control method for power system [J]. Automation of Electric Power Systems , 2020 , 44 ( 23 ): 179 - 191 .
WU Yuqi , YE Yuqing , MA Xiao , et al . Pre-synchronization scheme with voltage fluctuation suppression and frequency out-of-limit avoidance for grid connection of islanded microgrid [J]. Automation of Electric Power Systems , 2021 , 45 ( 14 ): 56 - 64 .
SHEN Xia , SHUAI Zhikang , SHEN Chao , et al . Review on operation and control of AC microgrid under large disturbance [J]. Automation of Electric Power Systems , 2021 , 45 ( 24 ): 174 - 188 .
CHEN Xin , JI Qiuhua , LIU Fei . Smooth transferring control method of microgrids based on master-slave configuration [J]. Transactions of China Electrotechnical Society , 2014 , 29 ( 2 ): 163 - 170 .
ZHENG Feng , YE Tao , LI Shichun , et al . Research on grid-connected/islanded smooth transition of microgrid based on generalized control algorithm of energy storage [J]. Proceedings of the CSEE , 2019 , 39 ( 10 ): 2840 - 2853 .
AHMED I , SUN L T , CHEN X . A novel control scheme for microgrid inverters seamless transferring between grid-connected and islanding mode [C]// 2017 China International Electrical and Energy Conference (CIEEC) , October 25-27 , 2017 , Beijing, China .
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 .
LI H J , WANG J , HU A P , et al . Smooth switching control strategy for microgrid based on state following controller [C]// 2018 2nd IEEE Conference on Energy Internet and Energy System Integration (EI2 ), October 20-22 , 2018 , Beijing, China .
ZHANG Liming , HOU Meiyi , ZHU Guofang , et al . Seamless transfer strategy of operation mode for microgrid based on collaborative control of voltage and current [J]. Automation of Electric Power Systems , 2019 , 43 ( 5 ): 129 - 135 .
MENG X , LIU Z , ZHENG H Y , et al . A universal controller under different operating states for parallel inverters with seamless transfer capability [J]. IEEE Transactions on Power Electronics , 2020 , 35 ( 9 ): 9794 - 9812 .
FANG Hongwei , TAO Yue , XIAO Zhaoxia , et al . Robust control and circulating current analysis for grid-connected parallel inverters [J]. Transactions of China Electrotechnical Society , 2017 , 32 ( 18 ): 248 - 258 .
DAI Wei , QIN Wenping , REN Chunguang , et al . Adaptive virtual impedance control based on decoupling droop in microgrid with synchronous generators [J]. Proceedings of the CSEE , 2020 , 40 ( 14 ): 4486 - 4495 .
AN R H , LIU Z , LIU J J . Successive-approximation-based virtual impedance tuning method for accurate reactive power sharing in islanded microgrids [J]. IEEE Transactions on Power Electronics , 2021 , 36 ( 1 ): 87 - 102 .
CHAI Xiuhui , ZHANG Chunjiang , ZHAO Xiaojun , et al . Self-recovery droop based active synchronization control and parameter optimization of distributed generator [J]. Automation of Electric Power Systems , 2020 , 44 ( 19 ): 128 - 133 .
GANJIAN-ABOUKHEILI M , SHAHABI M , SHAFIEE Q , et al . Seamless transition of microgrids operation from grid-connected to islanded mode [J]. IEEE Transactions on Smart Grid , 2020 , 11 ( 3 ): 2106 - 2114 .
CHEN Jie , NIU Bowen , ZHANG Junwen , et al . Hybrid control strategy for the seamless transfer of microgrids [J]. Proceedings of the CSEE , 2015 , 35 ( 17 ): 4379 - 4387 .
IEEE recommended practice for utility interface of photovoltaic (PV) systems: IEEE Std.929—2000 [S]. 2000 .
Frequency Regulation Method for Motor Load Participating in Fast Frequency Response in Independent Microgrids
Equivalent Projection Based Cooperative Optimal Operation Method for Multi-microgrid Flexible Distribution System
Review of Stability Analysis Methods and Improvement Measures for Power System Dominated by Multiple Virtual Synchronous Generators
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Related Institution
Guangxi Key Laboratory of Power System Optimization and Energy Technology (Guangxi University)
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Key Laboratory of Guangxi Electric Power System Optimization and Energy-saving Technologys (Guangxi University)
Key Laboratory of Modern Power System Simulation and Control & Renewable Energy Technology, Ministry of Education (Northeast Electric Power University)
School of Electrical Engineering, Southeast University