论文信息 - Single-Phase-to-Ground Fault Location Method Based on SOGI

Single-Phase-to-Ground Fault Location Method Based on SOGI

Most fault location methods depend on the exact extraction of fault transient feature. However, due to the weak grounding current, arc grounding and intermittent problems, it is difficult to extract the fault transient feature. Based on second-order generalized integrator (SOGI), a single-phase-to-ground fault section location method for neutral point ungrounded system is proposed to address this problem in this paper, which avoids the extraction of fault transient feature. Firstly, the fundamental wave phases of zero sequence voltage and zero sequence current are extracted by second-order generalized integrator. Then, the fault position is located based on their phase difference. Finally, the proposed strategy is tested by the simulation data and the field data. The test results show that the method proposed in this paper can accurately locate fault position. Moreover, the phase extraction method based on SOGI is more accurate than traditional Euler method.

Baikui Li

[1] Frede Blaabjerg,et al. Proportional-resonant controllers and filters for grid-connected voltage-source converters , 2006 .

[2] Liu Hu,et al. Motor speed estimation method based on second order generalized integrator-frequency locked loop , 2015, 2015 34th Chinese Control Conference (CCC).

[3] Rahman Dashti,et al. Single phase fault location in electrical distribution feeder using hybrid method , 2016 .

[4] Sabha Raj Arya,et al. SOGI–FLL Based Adaptive Filter for DSTATCOM Under Variable Supply Frequency , 2017 .

[5] Li Li,et al. A Frequency-Fixed SOGI-Based PLL for Single-Phase Grid-Connected Converters , 2017, IEEE Transactions on Power Electronics.

[6] Lixiang Wei,et al. Faulted Phase Location Identification for Adjustable Speed Drives in High-Resistance Grounding System , 2018, IEEE Transactions on Industry Applications.