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실 계통 연계 1.5MW급 DFIG 풍력발전 시뮬레이터의 응동특성 분석
최영도(Choy, Young-Do),전영수(Jeon, Young-Soo),전동훈(Jeon, Dong-Hoon),신정훈(Shin, Jeong-Hoon),김태균(Kim, Tae-Kyun),정병창(Jeong, Byung-Chang) 한국신재생에너지학회 2009 신재생에너지 Vol.5 No.3
The effect of change in DFIG (doubly-fed wind power generator) rotating speed and active power on the grid was analyzed to understand the characteristics of wind power using the wind power simulator connected to the grid at Gochang Power Quality Test Center. Electric power quality improvement devices (DVR, STATCOM, SSTS) and electric power quality disturbance application devices for 22.9 kV grid are equipped at Gochang Power Quality Test Center. Induction motor and VVVF inverter were used to emulate the blade of a wind power generator, and a simulator for Cage wound induction generator and DFIG was developed. The trial line were assumed to be 20 km and 40 km in length, and variable wind speed pattern was set using wind speed data from Ducjeokdo to verify the power characteristics of the wind power generator according to rotating speed.
피치각을 고려한 풍력발전기 출력특성 시뮬레이션 모델의 응용
송승호(Seung-Ho Song),정병창(Byung-Chang Jeong) 전력전자학회 2006 전력전자학술대회 논문집 Vol.- No.-
본 논문에서는 블레이드 피치각 변동을 포함한 풍력발전기 출력특성 시뮬레이션 모델을 개발하였으며, 피치각 변동이 필요한 경우를 각각 비상정지, 기동원활, 출력제한의 3가지 사례 연구를 통해 개발된 모델의 검증 수행하였다. 비상정지의 상황에서 풍력발전기의 출력특성을 모의하였고, 초기 정지 상태에서 블레이드 기동을 위한 초기 피치각 설정 및 변동하는 회전속도에 맞는 블레이드 변동 지령 값을 구현하였으며, 정격 풍속이상에서 피치각을 감소시키는 제어기를 구현하여 정격이상의 출력 발생이 제한되는 것을 시뮬레이션을 통하여 확인하였다.
PSCAD/EMTDC를 이용한 고창 시험 설비 단지 1.5MVA 풍력 시스템 모델 개발
윤동진(Dong-Jin Yun),한병문(Byung-Moon Han),최영도(Young-Do Choy),전영수(Young-Soo Jeon),정병창(Byoung-Chang Jeong),정용호(Yong-Ho Chung) 대한전기학회 2008 대한전기학회 학술대회 논문집 Vol.2008 No.11
This study proposes a model of 1.5MVA wind power system in Go-chang field demonstration and performs simulation according to variable wind speed. 1.5MVA wind power system was verified by computer simulations with PSCAD/EMTDC software. Terminal voltage, grid voltage and active/reactive power can be observed through the simulation results.
컴퓨터 시뮬레이션과 실규모 하드웨어시뮬레이터를 이용한 계통연계 풍력발전의 응동특성 분석
윤동진(Dong-Jin Yun),한병문(Byung-Moon Han),최영도(Young-Do Choy),전영수(Young-Soo Jeon),정병창(Byoung-Chang Jeong),정용호(Yong-Ho Chung) 대한전기학회 2009 대한전기학회 학술대회 논문집 Vol.2009 No.7
This paper describes comparative analysis results about the dynamic interaction of interconnected wind power system using the actual-size hardware simulator and the simulation model with PSCAD/EMTDC. The hardware simulator, which is composed of 2.0㎹A induction motor with drive system and 1.5㎿ doubly-fed induction generator, was built and tested in Go-Chang Test Site of KEPCO for analyzing the dynamic interaction with the interconnected distribution system. The operation of hardware simulator was verified through comparative analysis between experimental results and simulation results obtained by simulation model with PSCAD/EMTDC. The developed hardware simulator and simulation model could be effectively used for analyzing the dynamic interaction, which has various phenomena depending on the wind variation and the network state of interconnected power system.
컴퓨터시뮬레이션과 실용량 하드웨어시뮬레이터를 이용한 계통연계 풍력발전의 성능비교분석
윤동진(Dong-Jin Yun),오승진(Seung-Jin Oh),한병문(Byung-Moon Han),정병창(Byoung-Chang Jeong),정용호(Yong-Ho Jung),최영도(Young-Do Choy),전영수(Young-Soo Jeon) 대한전기학회 2009 전기학회논문지 P Vol.58 No.3
This paper describes comparative analysis results about the dynamic interaction of interconnected wind power system using the actual-size hardware simulator and the simulation model with PSCAD/EMTDC. The hardware simulator, which is composed of 2.0MVA induction motor with drive system and 1.5MW doubly-fed induction generator, was built and tested in Go-Chang Test Site of KEPCO for analyzing the dynamic interaction with the interconnected distribution system. The operation of hardware simulator was verified through comparative analysis between experimental results and simulation results obtained by simulation model with PSCAD/EMTDC. The developed hardware simulator and simulation model could be effectively used for analyzing the dynamic interaction, which has various phenomena depending on the wind variation and the network state of interconnected power system.
Jong Hoon Lee(이종훈),Minyong Kang(강민용),Jae Hoon Chung(정재훈),Hyun Hwan Sung(성현환),Hwang Gyun Jeon(전황균),Byung Chang Jeong(정병창),Seong Soo Jeon(전성수),Hyun Moo Lee(이현무),Se Hoon Park(박세훈),Binnari Kim(김빛나리),Ghee 대한비뇨기종양학회 2019 대한비뇨기종양학회지 Vol.17 No.2
Purpose: The efficacy of nivolumab in metastatic renal cell carcinoma (mRCC) has been proven. However, the nivolumab experience in Korean patients with mRCC is still poorly reported. We report initial experiences with the efficacy and safety of nivolumab in patients with mRCC. Materials and Methods: We retrospectively reviewed records for 25 patients with mRCC who had failed targeted therapy and were treated by nivolumab (2 ㎎/㎏, every 2 weeks) at a single institution. The primary endpoint was objective response rate (ORR), and secondary endpoints were progression-free survival (PFS), safety profiles, and ORR in a programmed cell death receptor ligand 1 (PD-L1) expression subgroup. Results: The median age was 60 years and 16 patients (64%) were male. Objective responses were achieved in 8 patients (32.0%) (complete response, 1; partial response, 7). Median PFS was 3.0 months (95% confidence interval, 1.46–4.53). Treatment-related adverse events (AEs) of any grade were observed in 19 patients (76.0%) with 6 (24.0%) experiencing grade 3 to 4 treatment-related AEs. In subgroups by PD-L1 expression levels classified as 1% or greater and less than 1%, ORR was 50% and 0%, respectively. Conclusions: This study showed the efficacy and safety of initial experiences with nivolumab in Korean patients with mRCC who had failed targeted therapy. Our results were comparable to recent clinical trials on nivolumab in mRCC.
정현우(Hyunwoo Chung),송완(Wan Song),유재호(Jae Ho Yoo),강민용(Min Yong Kang),전황균(Hwang Gyun Jeon),정병창(Byong Chang Jeong),서성일(Seong Il Seo),전성수(Seong Soo Jeon),최한용(Han Yong Choi),김찬교(Chan Kyo Kim),박병관(Byung Kwan 대한비뇨기종양학회 2017 대한비뇨기종양학회지 Vol.15 No.2
Purpose: We compared biopsy results and surgical outcomes of magnetic resonance imaging (MRI)-guided biopsy with transrectal ultrasonography (TRUS)-guided biopsy to demonstrate efficacy of MRI-guided biopsy on previous biopsy negative patients. Materials and Methods: We retrospectively reviewed data of 120 patients who were categorized into MRI-guided biopsy groups (n=20) and TRUS-guided biopsy groups (n=100). All patients were diagnosed with prostate cancer (PCa) and had undergone radical prostatectomy (RP) after MRI-guided or TRUS-guided repeat biopsy between January 2010 and March 2016. Detection rate of significant cancer and Gleason score upgrading and downgrading were examined, in addition to biopsy results and subsequent RP outcomes. Results: Median values for prostate-specific antigen level of the TRUS-guided biopsy group and the MRI-guided biopsy group were 6.67 and 5.86 ng/mL (p=0.303), respectively. Median prostate volume of each group (34.1 mL vs. 23.5 mL, p=0.007), number of positive cores (2.0 vs. 3.0, p=0.001) and maximum cancer/core rate (30.0% vs. 60.0%, p<0.001) were statistically different. Positive core rates of each group were 21.9% and 87.1%, respectively. Pathologic T stage was the only variable that showed difference in surgical outcomes (p=0.002). Most of PCa was confirmed as clinically significant PCa after RP in MRI-guided biopsy group (95%). Conclusions: MRI-guided biopsy showed higher positive core rate and detection rate of clinically significant PCa than TRUS-guided biopsy in repeat biopsy setting. Prospective multicenter large-scale study and accumulation of data is expected to further define superiority of the MRI-guided biopsy.