• Title/Summary/Keyword: Connected System

Search Result 53, Processing Time 0.167 seconds

A Study on the Development of Agricultural and Stockbreeding Products Information System Using IOT Based Connected System IOT (기반 Connected System을 이용한 농축산물정보시스템 구축)

  • Lee, Sung-Ha;Park, Chul-Ju
    • Korea Journal of Artificial Intelligence
    • /
    • v.5 no.2
    • /
    • pp.26-42
    • /
    • 2017
  • This study perceived that there are limits to prompt and accurate monitoring when an accident occurs and the correct information of egg production stage, such as the date of spawning, cleaning, and refrigerating cannot be identified, since eggshell codes using barcode only show numbers identifying a city and province and the name of producers. To fix this problem, this study partially suggested the RFID (Radio Frequency Identification) technology and IoT-based Connected System. The proposed system in this study shares data with related agencies as the system of agricultural and livestock product information runs as the main server, and the database information of the proposed system is provided by farmhouses, distributors, and sellers. Through various media such as a webpage or mobile application built to provide the relevant information, customers can search and obtain information about agricultural and livestock products they want. Since the information on an entire process is open to the public, information ranging from simple to clear, additional ones such as hazardous elements can be viewed.

A Hysteresis Current Controller for PV-Wind Hybrid Source Fed STATCOM System Using Cascaded Multilevel Inverters

  • Palanisamy, R.;Vijayakumar, K.
    • Journal of Electrical Engineering and Technology
    • /
    • v.13 no.1
    • /
    • pp.270-279
    • /
    • 2018
  • This paper elucidates a hysteresis current controller for enhancing the performance of static synchronous compensator (STATCOM) using cascaded H-bridge multilevel inverter. Due to the rising power demand and growing conventional generation costs a new alternative in renewable energy source is gaining popularity and recognition. A five level single phase cascaded multilevel inverter with two separated dc sources, which is energized by photovoltaic - wind hybrid energy source. The voltages across the each dc source is balanced and standardized by the proposed hysteresis current controller. The performance of STATCOM is analyzed by connecting with grid connected system, under the steady state & dynamic state. To reduce the Total Harmonic Distortion (THD) and to improve the output voltage, closed loop hysteresis current control is achieved using PLL and PI controller. The performance of the proposed system is scrutinized through various simulation results using matlab/simulink and hardware results are also verified with simulation results.

Development of Countermeasure for Improving the Power Quality using Coordinated Control of BESS on Electric Vehicle connected System (전기 자동차 계통 연계 시 BESS의 협조제어를 이용한 전력품질 향상 대책 개발)

  • Lee, Soon-Jeong;Kim, Sang-Won;Kim, Jun-Hyeok;Kim, Chul-Hwan
    • Journal of the Korean Institute of Illuminating and Electrical Installation Engineers
    • /
    • v.29 no.6
    • /
    • pp.63-69
    • /
    • 2015
  • Energy Storage Systems (ESSs) are essential in the future power systems because they can improve power usage efficiency. In this paper, we propose the countermeasure for improving the power quality using coordinated control of BESS(Battery Energy Storage System) on EV connected system. To verify the performance of proposed scheme, we simulate on the actual power system of KEPCO and compare the results of voltage variation, frequency variation, and load factor with those of uncoordinated control. From the simulation results, we confirm that frequency and voltage deviation are significantly reduced with proposed coordinated control of BESS.

Economic Analysis on Inter-Connected System of Port Transport and In-land Transportation -A Container Cargo Transport Oriented- (부산항 항만 운송과 육상 교통 연계시스템에 관한 경제성 분석 -컨테이너 화물 운송을 중심으로-)

  • Kwak, Kyu-Seok;Kim, Tae-Gon;Choi, Jae-Soo;Ahn, Ki-Myung
    • Journal of Korean Port Research
    • /
    • v.5 no.1
    • /
    • pp.29-54
    • /
    • 1991
  • In this study, to identify the ineffectiveness of inter-connected system of cargo volume between the Pusan Port and inland areas and also to make more rational suggestions, the following conclusions were drawn by analyzing Container Cargo Traffic from BCTOC to Off-Dock CY: 1. There existed about 30% to 50% reduction in the container transport times when the container transport vehicles were operated during the off-peak period to alleviate the traffic congestion due to mixed traffic. 2. There appeared to be more economic when Off-Dock DY's scattered around the City of Pusan were unified in one ODCY Unit at YangSan, and the Exclusive Overpass Freeway System for the container transport vehicles were constructed and operated on the existing Urban Freeway from BCTOC ti this ODCY Unit (Expected to make about 230 billions Won in net present value by NPV method).

  • PDF

A current control of Grid-connected system using DFT Method (DFT를 이용한 계통연계 시스템의 전류제어)

  • Park, M.Y.;Lee, S.H.;LIM, S.K.;Yang, H.Y.;Park, S.J.
    • Proceedings of the KIPE Conference
    • /
    • 2011.07a
    • /
    • pp.500-501
    • /
    • 2011
  • 신재생 에너지를 계통과 효율적으로 연계하기 위해서는 일정한 DQ파형이 필요하다. 하지만 부하의 변동으로 전류가 작을 경우 노이즈의 영향으로 제어에 어려움을 겪게 된다. 따라서 본 논문에서는 효율적인 전류 제어를 하기 위해 DFT 기법을 사용하여 노이즈를 제거하고 기본파 전류 파형을 추출하여DQ 변환을 수행한다.

  • PDF

Micro Mold System for Functional Polymer (기능성 고분자소재 성형용 마이크로 금형 시스템)

  • Heo Y. M.;Shin K. H.;Yoon G. S.;Jung W. C.
    • Proceedings of the Korean Society for Technology of Plasticity Conference
    • /
    • 2004.10a
    • /
    • pp.267-270
    • /
    • 2004
  • In Micro injection process, it is needed to the technique of making micro die, Rapid Thermal Pressing (RTP) and other techniques. Those techniques are independent. But the mutual connected system of techniques is needed. The target of this paper is the design of micro mold and the development of the entire micro injection techniques for functional polymer.

  • PDF

A Study on Effective Using Method of Apparel CAD System in Clothing Industrial (의류산업에 있어서의 어패럴 CAD 시스템의 활용실태 분석)

  • 한경희;이정순
    • The Research Journal of the Costume Culture
    • /
    • v.6 no.4
    • /
    • pp.149-161
    • /
    • 1998
  • The purpose of this study was to present the effective activation of apparel CAD system and for this, the investigation of actual condition of CAD using companies and comparative inspection with the advanced study were carefully considered. The results were as follows : 1. The investigation result of the system using enterprises is that the direct effect from the operation of the CAD system after its introduction was the promptness, ad the indirect effect of it was the growth of operation level and operating reliance. 2. The problem originated from the system was the uncertainty of employer effectiveness and the financing source for it when introduced, and the lack of consciousness of it when operated. 3. The using level in pattern manufacturing function was lower than that in grading and marking. Therefore, as the full automation in CAD system is a part of CIM construction and the direction to which apparel companies should go, a firmly connected system between management & the persons in charge in apparel companies, facility supplying companies, universities & other educational institutes, and the Government should be duly constructed first of all n order to achieve this aim.

  • PDF

Design of Non-isolated 2-stage Boost Converter Using Coupled Inductors (결합인덕터 방식을 이용한 비절연형 2단 부스트 컨버터 설계)

  • Kim, Kyu-Dong;Kim, Jun-Gu;Hwang, Sun-Hee;Won, Chung-Yuen;Jung, Yong-Chae
    • Proceedings of the KIPE Conference
    • /
    • 2011.07a
    • /
    • pp.25-26
    • /
    • 2011
  • In some cases of grid connected system using photovoltaic modules, high voltage step up ratio is required. In this paper, non-isolated 2-stage cascaded boost converter with coupled inductor is proposed. Due to reduce the input current ripple and size of the inductor by using coupled inductor method, this topology is suitable for MIC(Module Integrated Converter). The operational characteristic of the proposed topology is verified through the theorical analysis, simulation and experimental waveform.

  • PDF

A Study on System Analysis for Evaluation of Interconnected Line of North-South Korea (남북한 전력연계선로 평가를 위한 계통 분석에 관한 연구)

  • Cha, Jun-Min;Shin, Joong-Rin;Choi, Jae-Seok;Rho, Dae-Seok
    • Proceedings of the KIEE Conference
    • /
    • 2001.07a
    • /
    • pp.544-546
    • /
    • 2001
  • This paper presents the results of power flow of North-South Korea system with interconnected cases which were proposed by various present studies. PSS/E and PowerWorld Simulator were used to analyze the inter connected system with several interconnected lines alternatives. The results would be very useful to select the best alternative for interconnection with considering several evaluation terms.

  • PDF

A Study on Evaluation of Tie Lines between North and South Korea and its Selection of the Best Alternative (남북한 연계선로 평가 및 최적안 선정에 관한 연구)

  • Cha, Jun-Min;Rho, Dae-Seok;Choi, Jae-Seok;Kim, Hong-Rae;Shin, Joong-Rin
    • Proceedings of the KIEE Conference
    • /
    • 2001.11b
    • /
    • pp.414-417
    • /
    • 2001
  • This paper presents the results of power flow of North-South Korea system with interconnected cases which were proposed by various present studies PSS/E and PowerWorld Simulator were used to analyze the inter connected system with several interconnected lines alternatives. The results would be very useful to select the best alternative for interconnection with considering several evaluation terms.

  • PDF