Yonghwan Cho
North Carolina State University
5 Papers
25 Citations
Yonghwan Cho is an academic researcher from North Carolina State University. The author has contributed to research in topics: Voltage droop & Rectifier. The author has an hindex of 3, co-authored 5 publications.
Chat about Author
Papers
Design consideration of volt-VAR controllers in distribution systems with multiple PV inverters
Mahsa Ghapandar Kashani,Yonghwan Cho,Subhashish Bhattacharya +2 more
- 01 Sep 2016
TL;DR: In this paper, an analytical approach to study the stability of local voltage control in high PV penetrated distribution systems with advanced Volt-VAR control functions is employed, where the transient of inverter VoltVAR Control interactions and dynamics of the interconnected feed-back loops in the distribution circuits are investigated.
16
Seamless black start and reconnection of LCL-filtered solid state transformer based on droop control
Yonghwan Cho,Yongsu Han,Richard Beddingfield,Jung-Ik Ha,Subhashish Bhattacharya +4 more
- 01 Sep 2016
TL;DR: In this paper, a seamless black start control strategy is proposed for an SST-based smart grid system that has fault ride-through capability when it is islanded from the grid, and a method is developed to achieve smooth reconnection to the grid after a fault is cleared.
7
Comparative evaluation of SiC devices for PWM buck rectifier based active front end converter for MV grid interface
Sachin Madhusoodhanan,Yonghwan Cho,Arun Kadavelugu,Subhashish Bhattacharya,David Grider,Sei-Hyung Ryu,Anant K. Agarwal,Scott Leslie +7 more
- 28 Oct 2013
TL;DR: A current source based PWM buck rectifier with Silicon Carbide (SiC) devices, different from the traditional GTO based current source rectifier, is used to grid tie with 3-phase, 4.16 kV grid.
3
A multi-loop controller for LCL-filtered grid-connected converters integrated with a hybrid harmonic compensation and a novel virtual impedance
Yonghwan Cho,Maziar Mobarrez,Subhashish Bhattacharya +2 more
- 01 Mar 2017
TL;DR: In this paper, a multi-loop controller is proposed as one possible alternative to the conventional grid current controller to improve the harmonic compensation performance by using both HCCs and HVCs, which is a hybrid harmonic compensation (HHC).
3
Synchronous frame full-order observer design for three-phase buck-type PWM rectifier
Yonghwan Cho,Yongsu Han,Sachin Madhusoodhanan,Jung-Ik Ha,Subhashish Bhattacharya +4 more
- 01 Oct 2016
TL;DR: Using the proposed observer, the number of actual sensors needed for a buck-type rectifier control system can be reduced while maintaining fast dynamic performance and steady-state accuracy.
1