scholarly journals Appraisal of Aggregate Technical, Commercial and Collection Losses in Nigerian Electricity Distribution System

2021 ◽  
Vol 17 (4) ◽  
pp. 286-294
Author(s):  
U.A. Dodo ◽  
M. N. Nwohu ◽  
I.N. Abubakar ◽  
M.A. Dodo
Keyword(s):  
Power System ◽  
Distribution System ◽  
Distribution Systems ◽  
Collection Efficiency ◽  
Point Of View ◽  
Electricity Distribution ◽  
Policy Makers ◽  
Reliable Parameter ◽  
Distribution Company ◽  
The Cost

From a practical point of view, no power system is free of losses. Power system losses, especially in distribution systems are usually high and result in increasing the cost of operations to the electric utilities and the price tag of electricity to the consumers. Aggregate Technical, Commercial and Collection (ATC&C) losses is a reliable parameter that reveals the true energy and revenue loss conditions of distribution systems. In this paper, mathematical models were developed for the determination of billing efficiency, collection efficiency, and ATC&C losses using Life Camp Area Office’s network of Abuja Electricity Distribution Company Plc Nigeria, as a case study. The average billing efficiency, collection efficiency and ATC&C losses for the period under review were found to be 89.73%,84.80%, and 23.79% respectively. An understanding of appraisal of these losses is important to the power system Engineers, energy policy makers, and the power firms as it enables areas of high losses in the network to be identified, which will give room for credible investment plans and subsequent monitoring of the losses. Keywords: ATC&C losses, billing, energy, distribution system, revenue

scholarly journals Smart grids concept in electrical distribution system

2012 ◽  
Vol 16 (suppl. 1) ◽  
pp. 205-213 ◽  
Author(s):  
Zeljko Popovic ◽  
Bratislava Radmilovic ◽  
Vladan Gacic
Keyword(s):  
Power Distribution ◽  
Distribution System ◽  
Smart Grids ◽  
Distribution Systems ◽  
Business Processes ◽  
Cost Effective ◽  
Electrical Distribution Systems ◽  
Electrical Distribution ◽  
Distribution Company ◽  
The Cost

This paper defines key business processes in electrical distribution systems and key elements and priority components that should be (re)defined in these processes in order to enable the goals of smart grids concept to be fulfilled in the cost effective way. Activities undertaken in the Power Distribution Company of ?Elektrovojvodina? (Serbia), which provide the basis for fulfilling the Smart Grids goals and thus enable full implementation of smart grids concept are presented in details.

scholarly journals Flexibility Enhancement in an Islanded Distribution Power System by Online Demand-Side Management

2019 ◽  
Vol 217 ◽  
pp. 01020 ◽  
Author(s):  
Margarita Chulyukova ◽  
Nikolai Voropai
Keyword(s):  
Power System ◽  
Power Distribution ◽  
Distribution System ◽  
Distribution Systems ◽  
Load Shedding ◽  
Load Management ◽  
Daily Maximum ◽  
Power Distribution Systems ◽  
Power Distribution System ◽  
Islanded Operation

The paper considers the possibilities of increasing the flexibility of power distribution systems by real-time load management. The principles of the implementation of special automatic systems for this purpose are proposed. These systems enable some loads of specific consumers of the power distribution system switched to islanded operation to “shift” from the daily maximum to the minimum, which makes some generators available to connect certain essential consumers disconnected earlier by under-frequency load shedding system to the power system. The approach under consideration is illustrated by a power system with distributed generation.

scholarly journals Assessment of electricity distribution business model and market design alternatives: Evidence for policy design

2018 ◽  
Vol 31 (1) ◽  
pp. 40-59 ◽  
Author(s):  
Guillermo Ivan Pereira ◽  
Patrícia Pereira da Silva ◽  
Deborah Soule
Keyword(s):  
Business Model ◽  
Delphi Study ◽  
Distribution System ◽  
Policy Design ◽  
Market Design ◽  
Electricity Sector ◽  
Policy Framework ◽  
Electricity Distribution ◽  
Policy Makers ◽  
Evidence For Policy

The transition toward smart electricity distribution grids is transforming the European electricity sector. This has contributed to increased attention by policy makers regarding the future role of electricity distribution system operators in a more flexible, digital, and renewables-based electricity system. A better understanding on how to support the adaptation of the electricity distribution industry can contribute to the introduction of an effective policy framework. Our research provides evidence for policy design by presenting the results of a Policy Delphi study focused on business model and market design adaptation alternatives. We highlight the importance of supporting innovation and a more proactive approach to adaptation from both distribution system operators and regulators. Our findings support the importance of electricity distribution for neutral market facilitation, contributing to market development and enabling new market players. The results obtained support policy makers working on electricity sector adaptation and can contribute to the ongoing market redesign efforts under the Energy Union.

scholarly journals Bi-Level Operation Scheduling of Distribution Systems with Multi-Microgrids Considering Uncertainties

Electronics ◽  
2020 ◽  
Vol 9 (9) ◽  
pp. 1441
Author(s):  
Saeid Esmaeili ◽  
Amjad Anvari-Moghaddam ◽  
Erfan Azimi ◽  
Alireza Nateghi ◽  
João P. S. Catalão
Keyword(s):  
Distribution System ◽  
Distribution Systems ◽  
Optimization Problem ◽  
Point Of View ◽  
Mixed Integer ◽  
Wholesale Market ◽  
System Operator ◽  
Level Model ◽  
Upper Level ◽  
Operation Scheduling

A bi-level operation scheduling of distribution system operator (DSO) and multi-microgrids (MMGs) considering both the wholesale market and retail market is presented in this paper. To this end, the upper-level optimization problem minimizes the total costs from DSO’s point of view, while the profits of microgrids (MGs) are maximized in the lower-level optimization problem. Besides, a scenario-based stochastic programming framework using the heuristic moment matching (HMM) method is developed to tackle the uncertain nature of the problem. In this regard, the HMM technique is employed to model the scenario matrix with a reduced number of scenarios, which is effectively suitable to achieve the correlations among uncertainties. In order to solve the proposed non-linear bi-level model, Karush–Kuhn–Tucker (KKT) optimality conditions and linearization techniques are employed to transform the bi-level problem into a single-level mixed-integer linear programming (MILP) optimization problem. The effectiveness of the proposed model is demonstrated on a real-test MMG system.

scholarly journals Optimized Planning of Distribution Grids Considering Grid Expansion, Battery Systems and Dynamic Curtailment

Energies ◽  
2021 ◽  
Vol 14 (17) ◽  
pp. 5242
Author(s):  
Ouafa Laribi ◽  
Krzysztof Rudion
Keyword(s):  
Distribution System ◽  
Distribution Systems ◽  
Storage Systems ◽  
Planning Method ◽  
Battery Systems ◽  
Planning Algorithm ◽  
Reinforcement Measures ◽  
The Cost ◽  
Grid Reinforcement ◽  
Distribution Grids

The increasing integration of renewable energies into the grid is calling for the expansion of the power transport capacities in the distribution system. Yet, the expansion of the grid could require long authorization procedures and cannot be always asserted. Therefore, a higher utilization of the existing grid is becoming increasingly necessary today. This paper proposes a new time series-based planning method for distribution systems using classical grid expansion instruments as well as innovative planning instruments such as battery storage systems (BSS) and dynamic power curtailment (DPC). These planning instruments could be applied individually or combined. The aim of the BSS and DPC application is to enable a higher utilization of the grid at minimal costs. The proposed method, which has been implemented as an automated planning algorithm, determines the cost-optimal grid reinforcement measures that ensure the prevention of prognosticated congestions in the considered grid. Furthermore, the application of the proposed planning method on the considered power system has proven that a combination of BSS and grid expansion could be more economical than an individual application of BSS and grid expansion.

scholarly journals Novel Approach For Minimal Injected Harmonics At Distribution Level – Svc

2011 ◽  
pp. 90-94
Author(s):  
V. Lakshmi Devi ◽  
T. Phanindra
Keyword(s):  
Power Factor ◽  
Distribution System ◽  
Distribution Systems ◽  
Reactive Power ◽  
Low Cost ◽  
Harmonic Distortion ◽  
Voltage Regulation ◽  
Novel Approach ◽  
Artificial Neural Network Ann ◽  
The Cost

Electrical distribution system suffers from various problems like reactive power burden, unbalanced loading, voltage regulation and harmonic distortion. Though DSTATCOMS are ideal solutions for such systems, they are not popular because of the cost and complexity of control involved. Phase wise balanced reactive power compensations are required for fast changing loads needing dynamic power factor correcting devices leading to terminal voltage stabilization. Static Var Compensators (SVCs) remain ideal choice for such loads in practice due to low cost and simple control strategy. These SVCs, while correcting power factor, inject harmonics into the lines causing serious concerns about quality of the distribution line supplies at PCC. This paper proposes to minimize the harmonics injected into the distribution systems by the operation of TSC-TCR type SVC used in conjunction with fast changing loads at LV distribution level. Fuzzy logic system and ANN are going to be used solve this nonlinear problem, giving optimum triggering delay angles used to trigger switches in TCR. The scheme with Artificial Neural Network (ANN) is attractive and can be used at distribution level where load harmonics are within limits. Verification of the system and by using mat lab / simulink with proper modeling.

scholarly journals Designing the Analytical Base for Optimal Allocation of Stocks in Supply Chains

2018 ◽  
Vol 19 (4) ◽  
pp. 346-355 ◽  
Author(s):  
Lukinskiy Valery ◽  
Lukinskiy Vladislav
Keyword(s):  
Supply Chains ◽  
Inventory Management ◽  
Distribution System ◽  
Distribution Systems ◽  
Optimal Allocation ◽  
Point Of View ◽  
Efficiency Increase ◽  
Multi Level ◽  
Key Aspects ◽  
Management Issues

Abstract The carried out studies show that from the point of view of the issue of efficiency increase of logistical systems, there are several key aspects. Firstly, choice of methods for managing the triad of logistics functions ‘inventory management - warehousing – transportation’, where the inventory management issues are considered as the most relevant ones. Secondly, there is recognized the need to move the studies of multi-level systems within the framework of the concept of supply chain management. Nowadays, supply chains, which are represented by the distribution system, are widespread in practice. The most common of them are two-level ones with a central supplier at the second level and a certain number of companies at the first level; and multi-level systems of the distribution configuration network in which multi-nomenclature stocks are located. The article is devoted to the design and enhancement of analytical platform for inventory management in such distribution systems.

scholarly journals Evaluation of Distribution System Reliability Indices Using Fuzzy Reasoning Approach

2021 ◽  
Vol 5 (3) ◽  
pp. 1-8
Author(s):  
A. Paci ◽  
R. Bualoti ◽  
M. Çelo
Keyword(s):  
Fuzzy Logic ◽  
System Reliability ◽  
Distribution System ◽  
Weather Conditions ◽  
Electrical Current ◽  
Point Of View ◽  
Reliability Indices ◽  
Distribution Company ◽  
Distribution System Reliability ◽  
Current Loading

The most fundamental problems in the distribution system are the quality, the continuity, and the power supply. Political and economic changes were accompanied by changes in the structure of the electric load in the distribution network. Lack of investment and aging of the distribution company assets was accompanied by a decrease in the reliability of the distribution system. Identification and classification of assets from the point of view of their maintenance and replacement was one of the problems that were posed to the engineers. Fuzzy logic can be successfully used to evaluate distribution system reliability indices. In this paper fuzzy logic is used to evaluate the distribution system reliability indices of lines and transformers using six input variables. These variables considered the most important are: Age, Operation, Maintenance, Electrical current loading, Exposure and Weather conditions (Wind or Temperature). The fuzzy inferences knowledge-based IF-THEN rule is developed using Matlab Fuzzy software. The detailed analysis of the fuzzy system surfaces shows that the factors taken in consideration are dynamically and accurately connected to each other. The constructed rules based in engineering experience accurately represent the Reliability Indices.

scholarly journals Food products distribution systems redesign in the food corporation acquisition and fusion conditions

2009 ◽  
Vol 27 (No. 4) ◽  
pp. 223-227 ◽  
Author(s):  
I. Gros ◽  
J. Dyntar ◽  
S. Grosová
Keyword(s):  
Distribution System ◽  
Food Industry ◽  
Distribution Systems ◽  
Distribution Channel ◽  
Mineral Waters ◽  
Channel Structure ◽  
New Mineral ◽  
The Czech Republic ◽  
Distribution Costs ◽  
The Cost

The distribution channel structure significantly affects the distribution costs, and in the food industry the distribution costs have very often an important share on the total products cost. In the food industry, merger & acquisition conditions in the Czech Republic are the expected synergic effects. One of them is the cost saving following up from the redesign of the distribution system. On the case of a real project of the new mineral waters distribution system, the authors demonstrate their methodology and methods for the distribution system redesign, which integrates together the problem of the distribution object location with the distribution strategy choice and transport system design.

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