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The Transactions P of the Korean Institute of Electrical Engineers

Korean Journal of Air-Conditioning and Refrigeration Engineering

ISO Journal TitleTrans. P of KIEE
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    Korea Citation Index(KCI)

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Title Maximum Capacity Analysis of Parallel-Connected Inverter-Based Slack Generator by Filter Reactance Error
Authors 이수형(Soo Hyoung Lee)
DOI https://doi.org/10.5370/KIEEP.2022.71.4.275
Page pp.275-280
ISSN 1229-800X
Keywords DG acceptability; distributed generation; load sharing; parallel-connected inverter; scale-up of slack generator
Abstract The renewable-energy-penetration is rapidly increasing worldwide. This causes an increase in the inverter ratio in the power system.
This paper analyzes the effect of filter reactance error on the capacity of a scaled-up slack generator. In the scaled-up slack generator, parallel-connected multiple inverters, except the physical slack inverter, share the power supply to the grid by a predetermined ratio based on their capacities. It is inevitable having an error between real and known values of filter reactance. This makes the multiple inverters operate non-identically, so it reduces the maximum potential capacity of the scaled-up slack generator.
The scaled-up slack generator is simulated with parallel-connected eleven inverters, including one physical slack, to get the data for the analysis. The simulation is conducted using a power system computer-aided design/electromagnetic transient including DC (PSCAD/EMTDCTM).