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Seong-Jae Jang(장성재),Hyo-Ryong Seo(서효룡),Gyeong-Hun Kim(김경훈),Sang-Soo Park(박상수),Sang-Yong Kim(김상용),Minwon Park(박민원),In-Keun Yu(유인근) 대한전기학회 2009 대한전기학회 학술대회 논문집 Vol.2009 No.7
This paper deals with operational characteristic analysis of a single-phase PCS (Power Conditioning System) for PV (Photovoltaic) power generation system with AF (Active Filter) function. The theory of dq transformation has been applied to the control strategy of a single-phase PV power generation system to implement the AF function. Application of the virtual two-phase using phase-shift makes it possible to use the dq theory for the single-phase PV power generation system. The authors are sure that the proposed system is a very useful to compensate harmonics caused by nonlinear loads in a single-phase utility system. In this paper, not only a theoretical aspect of the single-phase PV-AF system is discussed, but also the DSP (Digital Signal Processor) based experiment results are presented to demonstrate the effectiveness of the single-phase PV-AF system.
Novel control algorithm for smart PCS with harmonics and reactive power compensation
Hyo-Ryong Seo(서효룡),Seong-Jae Jang(장성재),Sangsoo Park(박상수),Sang-Yong Kim(김상용),Gyeong-Hun Kim(김경훈),Minwon Park(박민원),In-Keun Yu(유인근) 대한전기학회 2009 대한전기학회 학술대회 논문집 Vol.2009 No.7
A significant number of renewable energy systems have been connected to the grids as supplement power source. The renewable energy systems require control algorithm to maintain the power-supply reliability and quality. This paper proposes a novel control algorithm for smart Power Conditioning System (PCS) with harmonics and reactive power compensation. The smart PCS is used to feed Photovoltaic (PV) power to utility and compensate harmonics and reactive power at the same time. The experimentation is carried out on the proposed grid-connected PV generation system, and controlled by digital signal processor. The grid-connected PV generation system injects PV energy into the grid and performs as Active Filter (AF) and Static Synchronous Compensator (STATCOM) without additional devices. The experiment results show that the proposed control algorithm is effective for smart PCS with harmonics and reactive power compensation.
Development of a Low Cost VI-Tracer for PV System using LabVIEW and DSP
Sang-Yong Kim(김상용),Sangsoo Park(박상수),Seong-Jae Jang(장성재),Gyeong-Hun Kim(김경훈),Hyo-Ryong Seo(서효룡),Minwon Park(박민원),In-Keun Yu(유인근) 대한전기학회 2009 대한전기학회 학술대회 논문집 Vol.2009 No.7
This paper deals with development of a low cost VI(Voltage-Currrent)-tracer for PV(Photovoltaic) system using LabVIEW and DSP(Digital Signal Processor). Although the conventional VI-tracer is a high cost equipment, it can't abstract the detailed parameters of solar cell. To overcome above mentioned disadvantages, in this paper, a converter type VI-tracer is developed. The DSP, which controls the buck-boost DC-DC converter, is used to implement the proposed VI-tracer algorithm. The proposed VI-tracer can abstract more detailed parameters of solar cell; A(temperature constant), Rs(series resistance), and Rsh(parallel resistance). The authors emphasize that the proposed VI-tracer can satisfy the users who need to get various parameters. A comparison between the proposed VI-tracer and the conventional VI-tracer is presented to show the effectiveness of the proposed system.
Sangsoo Park(박상수),Sang-Yong Kim(김상용),Seong-Jae Jang(장성재),Gyeong-Hun Kim(김경훈),Hyo-Ryong Seo(서효룡),Minwon Park(박민원),In-Keun Yu(유인근) 대한전기학회 2009 대한전기학회 학술대회 논문집 Vol.2009 No.7
PV (Photovoltaic) power generation system has been widely studied as a clean and renewable power source. Tracking the MPP (maximum power point) of a PV array is usually an essential part of a PV system. This paper describes POS (Photovoltaic Output Sensorless) MPPT method and optimization technique of its operational characteristics for grid-connected PV generation system. A DC-DC converter has been used to step-up the PV voltage and DC-AC converter has been used for connecting the system to the grid. Optimization technique has been implemented to optimize the current and voltage controller gain parameters and duty ratio increment of DC-DC converter. Simulation results reveal that the proposed control has better response.