• Title/Summary/Keyword: Distribution System Planning

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Power Distribution System Planning with Demand Uncertainty Consideration

  • Wattanasophon, Sirichai;Eua-arporn, Bundhit
    • Journal of Electrical Engineering and Technology
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    • v.3 no.1
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    • pp.20-28
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    • 2008
  • This paper proposes a method for solving distribution system planning problems taking into account demand uncertainty and geographical information. The proposed method can automatically select appropriate location and size of a substation, routing of feeders, and appropriate sizes of conductors while satisfying constraints, e.g. voltage drop and thermal limit. The demand uncertainty representing load growth is modeled by fuzzy numbers. Feeder routing is determined with consideration of existing infrastructure, e.g. streets and canals. The method integrates planner's experience and process optimization to achieve an appropriate practical solution. The proposed method has been tested with an actual distribution system, from which the results indicate that it can provide satisfactory plans.

Determination of the Transportation Cycle Time and the Vehicle Size in a Distribution System (물류시스템에서 수송주기와 차량크기의 결정)

  • Chang Suk-Hwa
    • Journal of Korean Society of Industrial and Systems Engineering
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    • v.27 no.4
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    • pp.23-32
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    • 2004
  • This paper addresses a model for the transportation planning that determines the transportation cycle time and the vehicle size to minimize the cost in a distribution system. The vehicle routing to minimize the transportation distance of the vehicles is also determined. A distribution system is consisted of a distribution center and many retailers. Products are transported from distribution center to retailers according to transportation planning. A model is assumed that the time horizon is continuous and infinite, and the demand of retailers is constant and deterministic. Cost factors are the transportation cost and the inventory cost, which the transportation cost is proportional to the transportation distance of vehicle when products are transported from distribution center to retailers, and the inventory cost is proportional to inventory amounts of retailers. A transportation cycle time and a vehicle size are selected among respective finite alternatives. The problem is analyzed, and a illustrative example is shown.

A Studyon Implementation of TPBS (Transportation-planning Programming Budgeting System) (교통기획예산제도(TPBS) 도입방안에 관한 연구)

  • 김종민
    • Journal of Korean Society of Transportation
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    • v.13 no.1
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    • pp.153-165
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    • 1995
  • The budget management in Korea is one-year budget system which is just following int he steps of last years budget plan. This system towards traditional item-by-item and restriction-centered budget system. The budget distribution without establishing and considering rational policy goals and directions have brought inefficient resource allocations. In order to promote the implementation of transportation planning, there are some alternatives like introduction of top-down planning system preparing for the provincial self-government era. In this study, the most efficient alternatives to promote the existing management system is referring by foreign countries transportation planning examples(BVWP system in Germany). First of all, mid-long term transportation and budget planning should be established and then make decisions of resource availability and allocation. In order to provide ration budget planning, introduction of Transportation Planning Programming Budget System(TPBS) has been judged as one of the method of unifying the sysematic transportation improvement planning and budgeting. All transporation planning and related activites can not be expressed in quantity and due to the limitation of excessive cost of analyzing transportation planning and ranking priority, here after, the continuous study to minimize the evaluation cost and introduction of TPBS should be done.

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Optimal Capacity and Allocation Distributed Generation by Minimization Operation Cost of Distribution System (배전계통 운영비용의 최소화에 의한 분산전원의 최적 용량과 위치결정)

  • 배인수;박정훈;김진오;김규호
    • The Transactions of the Korean Institute of Electrical Engineers A
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    • v.53 no.9
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    • pp.481-486
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    • 2004
  • In operation of distribution system, $DG_s$ Distributed Generations) are installed as an alternative of extension and establishment of substations and transmission and distribution lines according to increasing power demand. In operation planning of $DG_s$, determining optimal capacity and allocation gets economical pro(it and improves power reliability. This paper proposes determining a optimal number, size and allocation of $DG_s$ needed to minimize operation cost of distribution system. Capacity of $DG_s$ (or economical operation of distribution system estimated by the load growth and line capacity during operation planning duration, DG allocations are determined to minimize total cost with power buying cost. operation cost of DG, loss cost and outage cost using GA(Genetic Algorithm).

Development of Genetic Algorithm for Production and Distribution Management in Multiple Supplier Network Environment of Robot Engineering Industry (로봇 산업의 다중 공급망 환경을 고려한 생산 및 분배 관리를 위한 유전 알고리듬 개발)

  • Jo, Sung-Min;Kim, Tai-Young;Hwang, Seung-June
    • Journal of Information Technology Applications and Management
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    • v.20 no.2
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    • pp.147-160
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    • 2013
  • Today, the management environments of intelligence firm are changing the way of production planning and logistics management, and are changing the process of supply chain management system. This paper shows the development of information system software for intelligence enterprises is used in supply chain management for robot engineering industry. Specifically, supply chain management system in this paper has been developed to analyze the impact of multi plant and multi distribution environment, showing the process analysis and system development of hierarchical assembly manufacturing industry. In this paper we consider a production planning and distribution management system of intelligence firm in the supply chain. We focus on a capacitated production resource and distribution volume allocation problem, develop a mixed integer programming model, and propose an efficient heuristic procedure using a genetic algorithm to solve it efficiently. This method makes it possible for the population to reach the feasible approximate solution easily. The proposed regeneration procedures, which evaluate each infeasible chromosome, makes the solution converge to the feasible approximate solution quickly.

A study on the Mid-Long Planning of Distrubution System in ChangWon City (창원시 비전계통 중장기 계획에 관한 연구)

  • Choi, Sang-Bong;Moon, Young-Whan;Chang, Jung-Tae;Hwang, Soo-Chun;Kim, Dong-Myung
    • Proceedings of the KIEE Conference
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    • 1995.07b
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    • pp.565-567
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    • 1995
  • Though he is a experienced expert, it takes much time and considerable effort to review this items in detail since the widespread terms to plan distribution system is considered. Therefore it needs software system for planning of distribution system to solve much time and human resoureces due to manipulate many data and calculate sophiscated technology. The object this study raises its availability by assisting distribution works such as load forecast, substation planning in ChangWon city based on CADPAD software package.

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Heuristic for Distribution Planning in Capacitated Multi-echelon Supply Chains (생산 능력 제한이 있는 다계층 공급사슬의 분배계획을 위한 발견적 기법)

  • Kwon, Ick-Hyun;Shin, Hyun-Joon;Kim, Sung-Shick
    • IE interfaces
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    • v.19 no.2
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    • pp.124-132
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    • 2006
  • The system under study is a single item, multi-echelon distribution system with a capacitated production facility. All the nodes at the downstream ends are demand-sites, i.e., ordered items are delivered to the customers from the node. Also any transshipment depots in the midstream can be demand-sites as well. For a given planning period, at each of demand-site, demand is forecasted and known. Our objective is to minimize the average system cost per period which is the sum of holding and backorder costs in the entire network. Due to the capacity restrictions, it is difficult to establish efficient distribution planning. To overcome such a difficulty and obtain a reasonable and better solution, we convert this problem into a single machine earliness and weighted tardiness scheduling. We propose a simple but cost-effective heuristic for this problem. The experimental results showed that the proposed heuristic obtained much better solutions compared with another approach.

Distribution Planning for Capacitated Supply Chains Using Tabu Search Approach (타부 탐색을 이용한 생산능력 제한하의 공급망 분배계획)

  • Kwon, Ick-Hyun;Baek, Jong-Kwan;Kim, Sung-Shick
    • IE interfaces
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    • v.18 no.1
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    • pp.63-72
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    • 2005
  • In this paper, we present a distribution planning method for a supply chain. Like a typical distribution network of manufacturing firms, we have the form of arborescence. To consider more realistic situation, we investigated that an outside supplier has limited capacity. The customer demands are given in deterministic form in finite number of discrete time periods. In this environment, we attempt to minimize the total costs, which is the sum of inventory holding and backorder costs over the distribution network during the planning horizon. To make the best of the restricted capacity, we propose the look-ahead feature. For looking ahead, we convert this problem into a single machine scheduling problem and utilize tabu search approach to solve it. Numerous simulation tests have shown that the proposed algorithm performs quite well.

The Optimum Valuation Model Construction Planning Of Port EDI System (항만물류 EDI 시스템의 최적평가모델 구축방안)

  • 한계섭;김현수;박남규;최형림;조재형
    • Proceedings of the Korea Association of Information Systems Conference
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    • 2001.12a
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    • pp.14-30
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    • 2001
  • At present, EDI system is indispensable process in Port and e-logis industry. Using EDI system service has been variably applicable Client/Server system base on 2-Tier, Web EDI and skill oriented distribution object. Up to date, EDI System has been Closed. Moreover it raised several points on User. For settling the problem, A study make progress with Web EDI system, XML/EDl system, distribution object technology based on 3-Tier. This Study produce several EDI system and Service. With a Result of study as the central figure, All kinds of System and Service make a comparative study synthetically in port and e-logis industry. As a result of Study, this paper make an Model Construction Planning for estimating the Port EDI System.

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A Study on the determination for Planning Levels of Harmonics in Distribution Systems (배전 계통에서의 고조파 계획레벨 결정을 위한 연구)

  • Jeon, Young-Jae;Cho, Num-Hun
    • Proceedings of the KIEE Conference
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    • 2003.07a
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    • pp.30-32
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    • 2003
  • This paper presents the determination procedure for planning levels of harmonics in distribution systems. Planning levels should be determinated by considering the system property, operation codition, and others based on compatibility levels. In this paper international standards for harmonics are studied and the determination procedure for planning levels is deduced.

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