Analysis on Influence of Inverter-interfaced Generator on Element of Phase Selectors

作者：Chen, Shi^*; Tai, Nengling; Fan, Chunju; Liu, Jian; Hong, Shubin

来源：Automation of Electric Power Systems, 2017, 41(12): 106-112 and 187.

DOI：10.7500/AEPS20160511005

• Fault analysis
• Inverter-interfaced generator
• Low-voltage ride-through
• Negative-sequence currents
• Phase selector
• Positive-sequence components
• Symmetrical components
• Two-phase current difference

The positive-sequence control strategy is adopted for the integration of large-scale use of inverter-interfaced generators (IIGs) under fault conditions, and the fault current supplied by IIGs only consists of positive-sequence components. Such being the case, the positive- and negative-sequence current distribution coefficients on the IIG side are no longer equal any more. Based on this fault characteristic, the performance of the two traditional phase selectors for transmission lines emanating from IIGs, e.g., the phase selector of the sudden-change of two-phase current difference and the phase selector of the phase comparison of symmetrical components, are analyzed. The phase selectors on the IIG side fail to operate, whereas those on the system side can still make correct decisions. Simulation results based on PSCAD validate the effectiveness of the analysis. Finally, prospective phase selector criterion for systems containing IIGs is proposed.

• 出版日期2017
• 单位上海交通大学