논문 해외 국제전문학술지(SCI급) Design and Implementation of Novel Fault Ride through Circuitry and Control for Grid-Connected PV System
- 학술지 구분 국제전문학술지(SCI급)
- 게재년월 2022-08
- 저자명 D. Kim, U. F. Ramadhan, A. U. Islam, S. Jung
- 학술지명 Sustainability
- 발행처명 MDPI
- 발행국가 해외
- 논문언어 외국어
홈페이지논문 초록 (Abstract)
This paper provides a comparison of a designed method of a fault ride through (FRT) circuit, i.e., switch-type fault current limiter (STFCL) and bridge-type fault current limiter (BFCL), to optimize the electrical parameters of grid-connected solar systems (PVSs) under asymmetric single line-to-ground fault and symmetric three-phase fault. The main differences between switch- and bridge-type fault current limiters is the electric component devices such as the bridge rectifier, snubber capacitor, energy absorption bypass and current-limiting inductors. In addition, the designed FRT performance with the inverter control are analyzed in-depth, e.g., a well-adjusted proportional integral (PI) and proposed steepest descent (SD) controller are compared in the fault condition. To compare the proposed method with the conventional method, the AC power and voltage on a common coupling point (PCC) and DC link voltage of the PV system are analyzed with a MATLAB/Simulink model of a 100 kW three-phase grid-connected photovoltaic system. The simulation results of the proposed FRT circuit and SD controller verify the stability improvement and vibration-free and fast and robust responses of electrical parameters on both PV grid sides during asymmetric disturbances. Keywords: renewable energies; photovoltaic system (PVS); fault ride through (FRT) circuitry; point of common coupling (PCC); switch-type fault current limiter (STFCL); bridge-type fault current limiter (BFCL)