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http://dx.doi.org/10.6113/JPE.2019.19.2.509

Comparison of Three Active-Frequency-Drift Islanding Detection Methods for Single-Phase Grid-Connected Inverters  

Kan, Jia-rong (Department of Electrical Engineering, Yancheng Institute of Technology)
Jiang, Hui (Department of Electrical Engineering, Yancheng Institute of Technology)
Tang, Yu (Department of Electrical Engineering, Hebei University of Technology)
Wu, Dong-chun (Department of Electrical Engineering, Yancheng Institute of Technology)
Wu, Yun-ya (Department of Electrical Engineering, Yancheng Institute of Technology)
Wu, Jiang (Suzhou Power Supply Company, National Grid Jiangsu Electric Power Co.)
Publication Information
Journal of Power Electronics / v.19, no.2, 2019 , pp. 509-518 More about this Journal
Abstract
A novel islanding detection method is proposed in this paper. It is based on a frequency drooping PLL, which was presented in a previous work. The cause of errors in the non-detection zone (NDZ) of conventional frequency disturbance islanding detection methods (IDM) is analyzed. A frequency drooping phase-locked-loop (FD-PLL) is introduced into a single-phase grid-connected inverter (SPGCI), which can guarantee that grid current is in phase with the grid voltage. A novel FD-PLL IDM is proposed by improving this PLL. In order to verify the performance of the proposed FD-PLL IDM, a full performance comparison between the proposed IDM and typical existing active frequency drift IDMs is carried out, which includes both dynamic performance and steady performance. With the same NDZ, the total harmonic distortion of the grid-current in the dynamic process and steady state is analyzed. The proposed FD-PLL IDM, regardless of the dynamic or steady process, has the best power quality. Experimental and simulation results verify that the proposed FD-PLL IDM has excellent performance.
Keywords
FD-PLL; IDM; NDZ error; Power quality; SFS; Single-phase grid-connected inverter (SPGCI); SMS;
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Times Cited By KSCI : 3  (Citation Analysis)
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