• 한국전기전자재료학회:학술대회논문집
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• 한국전기전자재료학회 2004년도 춘계학술대회 논문집
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• pp.17-20
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• 2004

PV model is presented based on the shockley diode equation. The simple model has a photo-current source, an single diode junction and a series resistance and includes temperature dependences. An accurate PV module electrical model is presented, matching with boost converter MPPT strategy and demosntarted in Matlab for a typical general purpose solar cell. Given solar insolation and temperature, the model returns current vector and MPP.

• 전자공학회논문지C
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• 제34C권12호
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• pp.9-19
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• 1997

This paper describes the design and FPGA implementation of a system control unit within a multiprocessor chip which can be used as a node processor ina massively parallel processing (MPP) caches, memory management units, a bus unit and a system control unit. Major functions of the system control unit are locking/unlocking of the shared variables of protected access, synchronization of instruction execution among four integer untis, control of interrupts, generation control of processor's status, etc. The system control unit was modeled in very high level using verilog HDL. Then, it was simulated and verified in an environment where trap handler and external interrupt controller were added. Functional blocks of the system control unit were changed into RTL(register transfer level) model and synthesized using xilinx FPGA cell library in synopsys tool. The synthesized system control unit was implemented by Xilinx FPGA chip (XC4025EPG299) after timing verification.

• 전기학회논문지
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• 제58권10호
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• pp.1968-1975
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• 2009

The paper proposes a novel control algorithm for tracking maximum power of PV generation system.. The maximum power of PV array is determinated by a insolation and temperature. Prior considered the term in PV generation system is how maximum power point(MPP) is accurately tracked.. The paper proposes a fuzzy neural network(FNN) control algorithm so as to accurately track those maximum power points. The proposed control algorithm comprises the antecedence part of fuzzy rule and clustering method, multi-layer neural network in the consequent part. FNN has the advantages which are depicted both high performance and robustness in fuzzy control and high adaptive control in neural network.. Specially, it can show the outstanding control performance for parameter variations appling to non-linear character of PV array. In this paper, the tracking speed and the accuracy prove the validity through comparing a proposed algorithm with a conventional one.

• 한국정보과학회논문지:컴퓨팅의 실제 및 레터
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• 제5권1호
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• pp.29-42
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• 1999

은행이나 증권시장 혹은 통신 분야와 같은 온라인 트랜잭션처리 (OLTP) 응용 분야들이 계속 증가하고 있으며 그 규모와 복잡성은 매년 405에서 50% 이상 증가하고 있는 것으로 평가되고 있다. 이러한 복잡한 OLTP 응용분야들은 한 대의 개인용 컴퓨터나 워크스테이션으로는 처리가 불가능하며, 슈퍼 컴퓨터나 MPP와 같은 고성능의 컴퓨터를 이용하는 경우에는 방대한 예산이 소요될 것이다. 본 논문에서는 데이터를 공유하는 워크스테이션 클러스터에서 트랜잭션을 병렬로 처리할 수 있는 고성능 트랜잭션처리 시스템인 PHLOX를개발한다. PHLOX는 네트워크 파일 시스템을 이용하여 데이터를 공유함으로써 확장성이 뛰어나며 각 워크스테이션의 메모리 버퍼간에 직접 데이터 전송을 지원함으로써 디스크 액세스빈도수를 줄일 수 있다는 장점을 갖는다.

• 전력전자학회:학술대회논문집
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• 전력전자학회 2017년도 전력전자학술대회
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• pp.136-137
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• 2017

Maximum power point tracking (MPPT) under partial shading condition (PSC) is a challenging process in the PV array system. The shaded PV panel makes different peak patterns on the P-V curve and misguides the MPPT algorithm. Various kinds of global MPP (GMPP) detecting algorithms are used to overcome this issue. Generally, too frequent execution of GMPP tracking algorithm reduces the achievable power of PV panel due to time spent on the scanning process. Thus, partial shading detection algorithm is essential for efficient utilization of solar energy source. While conventional method only detects fast shading patterns, the proposed algorithm always shows superb performance regardless of the speed of partial shading patterns.

• 한국조명전기설비학회:학술대회논문집
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• 한국조명전기설비학회 2009년도 춘계학술대회 논문집
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• pp.317-320
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• 2009

Under partial shading condition, the multiple local maxima can be existed on the output characteristics of PV array. In case of the conventional MPPTs (i.e P&O or IncCond), the failure of maximum power point tracking could be occurred under partial shading condition(PSC). The problems are deduced by the analysis of conventional MPPTs. In this paper, a real maximum power point tracking for PV array under partially shaded condition is proposed. And proposed MPPT is analyzed by case study. It is confirmed by simulation results that the proposed MPPT can track the real MPP under partial shading condition.

• 전력전자학회:학술대회논문집
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• 전력전자학회 2014년도 전력전자학술대회 논문집
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• pp.361-362
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• 2014

본 논문은 PV cell의 전기적 등가회로에 대하여 테브난-노턴 분석방법을 통하여 3개의 대표적인 운전점에서 I-V 특성곡선의 접선의 기울기를 $R_s$와 $R_{sh}$ 및 $R_{MPP}$에 관련되는 값으로써 정량적으로 구하는 방법을 제시한다. 이 값들은 PV cell의 전류방정식에서 파생되는 4원 1차 연립방정식의 경계조건은 만족함으로써 전기적 등가회로의 4가지 요소에 대한 값을 구할 수 있는 길이 열린다. 제안된 방법은 제조사가 datasheet에서 특성을 보장하는 초기 PV cell 제품에 대한 I-V 특성뿐만 아니라, 열화가 진행된 PV cell의 실제적인 I-V 특성을 정확히 시뮬레이션 할 수 있다는 장점이 있다.

• Toxicological Research
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• 제9권2호
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• pp.217-224
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• 1993

1-Methyl-4-phenyl-1,2,3,6-tetrahydropyridine (MPTP) is a well-known dopamine neuron-specific toxin. But the involvement of oxidative damage in the pathogenesis of MPTP-induced parkinsonism is still uncertain. In this study, by using 2',7',-dichlorofluorescin diacetate(DCFH-DA) that detects intracellular oxidative processes, the effect of MPTP on dichlorofluorescein fluorescence in dissociated cells from fetal rat mesencephalon in culture was investigated. At 7th day in culture, cells were loaded with DCFH-DA, and exposed to 1 mM MPTP or MPP+. MPTP induced dichlorofluorescein-fluorescence which was peaked at 3 min and mostly faded away 30 min after MPTP treatment.

• 전력전자학회:학술대회논문집
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• 전력전자학회 2015년도 추계학술대회 논문집
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• pp.31-32
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• 2015

본 논문에서는 전하 균등화를 해주는 동시에 차동전력조절 방식(Differential Power Processing, DPP)을 추가하여 최대 전력점(Maximum Power Point, MPP)을 추종하는 회로를 제안한다. 이를 통하여 본 논문에서는 PV모듈을 제어를 하고, 동시에 벅-플라이백 컨버터를 이용하여 전하 균등화를 할 수 있다. 본 논문에서의 전력조절기는 포워드컨버터로 구성 되어 있고, 주 컨버터인 전하균등화회로는 벅-플라이백컨버터로 구성하였다. 컨버터의 입력은 PV모듈을 직렬로 연결, 출력은 배터리를 직렬로 연결하여 제안한 기능을 구현하였다. 이에 따른 조건을 수식으로 증명하였다.

• 한국시뮬레이션학회논문지
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• 제7권1호
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• pp.69-83
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• 1998

In this paper, we present the results of simulation by running parallel VHDL simulation on typical MPP(Massively Parallel Processor) systems such as IBM SP2 and SGI Origin 2000. Parallel simulation uses the synchronous protocol and parallel program is implemented using MPI(Message Passing Interface) based on message passing model, so that it can urn on any parallel programming environment which supports MPI, a standard communication library. And then GVT(Global Virtual Time) computation for parallel simulation is based on the global broadcasting with MPI＿Bcast(), which is a standard function in MPI and piggybacking. Our benchmark exhibits that as size of VHDL grows, the parallel simulation has a better performance compared with the sequential simulation. In addition, we also show the results of comparison between IBM SP2 and SGI Origin 2000 by applying the same application to those indirectly.