Optimal number, type and location of remotely controlled and supervised devices in distribution networks

2015 ◽  
Author(s):  
Zeljko Popovic ◽  
Stanko Knezevic ◽  
Branislav Brbaklic
Keyword(s):  
Distribution Networks ◽  
Optimal Number

scholarly journals Management of Water Distribution Systems in PDA Condition with Isolation Valves

Proceedings ◽  
2018 ◽  
Vol 2 (11) ◽  
pp. 672 ◽  
Author(s):  
Attilio Fiorini Morosini ◽  
Olga Caruso ◽  
Paolo Veltri
Keyword(s):  
Distribution Systems ◽  
Water Distribution ◽  
Distribution Networks ◽  
Optimal Number ◽  
System Control ◽  
Pipe Failure ◽  
Reliable System ◽  
Network Nodes ◽  
Pipe Burst

The correct management of Water Distribution Networks (WDNs) allows to obtain a reliable system. When a pipe failure occurs in a network and it is necessary to isolate a zone, it is possible that some nodes do not guarantee service for the users due to inadequate heads. In these conditions a Pressure Driven Analysis (PDA) is the correct approach to evaluate network behavior. This analysis is more appropriate than the Demand Driven Analysis (DDA) because it is known that the effective delivered flow at each node is influenced by the pressure value. In this case, it is important to identify a subset of isolation valves to limit disrupting services in the network. For a real network, additional valves must be added to existing ones. In this paper a new methodological analysis is proposed: it defines an objective function (OF) to provide a measure of the system correct functioning. The network analysis using the OF helps to choose the optimal number of additional valves to obtain an adequate system control. In emergency conditions, the OF takes into account the new network topology obtained excluding the zone where the broken pipe is located. OF values depend on the demand deficit caused by the head decrement in the network nodes for each pipe burst considered. The results obtained for a case study confirm the efficiency of the methodology.

Decision support system to divide a large network into suitable District Metered Areas

2012 ◽  
Vol 65 (9) ◽  
pp. 1667-1675 ◽  
Author(s):  
Ricardo Gomes ◽  
Alfeu Sá Marques ◽  
Joaquim Sousa
Keyword(s):  
Water Distribution ◽  
Simulated Annealing Algorithm ◽  
Distribution Networks ◽  
Economic Benefits ◽  
Optimal Number ◽  
Large Network ◽  
Entry Points ◽  
The Difference ◽  
Large Water ◽  
Hydraulic Simulator

This paper presents a new approach to divide large Water Distribution Networks (WDN) into suitable District Metered Areas (DMAs). It uses a hydraulic simulator and two operational models to identify the optimal number of DMAs, their entry points and boundary valves, and the network reinforcement/replacement needs throughout the project plan. The first model divides the WDN into suitable DMAs based on graph theory concepts and some user-defined criteria. The second model uses a simulated annealing algorithm to identify the optimal number and location of entry points and boundary valves, and the pipes reinforcement/replacement, necessary to meet the velocity and pressure requirements. The objective function is the difference between the economic benefits in terms of water loss reduction (arising from the average pressure reduction) and the cost of implementing the DMAs. To illustrate the proposed methodology, the results from a hypothetical case study are presented and discussed.

scholarly journals Modelling water quality in drinking water distribution networks from real-time direction data

2012 ◽  
Vol 5 (1) ◽  
pp. 39-45 ◽  
Author(s):  
S. Nazarovs ◽  
S. Dejus ◽  
T. Juhna
Keyword(s):  
Real Time ◽  
Water Distribution ◽  
Flow Direction ◽  
Distribution Network ◽  
False Negative ◽  
Water Distribution Network ◽  
Distribution Networks ◽  
Optimal Number ◽  
Negative Results ◽  
Time Flow

Abstract. Modelling of contamination spread and location of a contamination source in a water distribution network is an important task. There are several simulation tools developed, however the significant part of them is based on hydraulic models that need node demands as input data that sometimes may result in false negative results and put users at risk. The paper considers applicability of a real-time flow direction data based model for contaminant transport in a distribution network of a city and evaluates the optimal number of flow direction sensors. Simulation data suggest that the model is applicable for the distribution network of the city of Riga and that the optimal number of sensors in this case is around 200.

scholarly journals Modelling water quality in drinking water distribution networks from real-time direction data

2012 ◽  
Vol 5 (1) ◽  
pp. 31-46
Author(s):  
S. Nazarovs ◽  
S. Dejus ◽  
T. Juhna
Keyword(s):  
Real Time ◽  
Distribution System ◽  
Water Distribution ◽  
Flow Direction ◽  
Distribution Network ◽  
Water Distribution Network ◽  
Distribution Networks ◽  
Optimal Number ◽  
Time Flow ◽  
Drinking Water Distribution

Abstract. Modelling of contamination spread and location of contamination source in a water distribution network is an important task. The paper considers applicability of real-time flow direction data based model for contaminant transport for a distribution network of a city. Simulations of several contamination scenarios are made to evaluate necessary number of flow direction sensors. It is found that for a model, containing major pipes of Riga distribution system, sensor number decrease from 927 to 207 results in average 20% increase of simulated contaminated length of pipes. Simulation data suggest that optimal number of sensors for Riga model is around 200.

scholarly journals SAIFI AND SAIDI INDICATIVE RELIABILITY FIGURES OF RURAL ELECTRIC NETWORKS WITH SMART ISLAND RECLOSERS

2019 ◽  
Vol 51 (3) ◽  
pp. 83-92
Author(s):  
L.P. Andrianova ◽  
◽  
V.Yu. Kabashov ◽  
D.S. Khairislamov ◽  
◽  
...  
Keyword(s):  
Distribution Networks ◽  
Network Reconstruction ◽  
Optimal Number ◽  
Electrical Network ◽  
Annual Number ◽  
Investment Efficiency ◽  
Electric Networks ◽  
New Consumer ◽  
Annual Duration ◽  
Responsible Consumer

The paper describes principles of improving the reliability of rural distribution networks of 6–35 kV based on smart switching devices, reclosers with specialized integrated controllers. The typical places to install reclosers for the radial and ring feeders are shown. They are mounted when a new consumer is connected and balance membership is delimited. It is also done to identify a responsible consumer with an indicated connection diagrams. The choice of the optimal number of reclosers for the radial and ring feeders according to indicative figures RNRE and ARAE, characterizing the relative efficiency of network reconstruction by reducing the number of consumer outages per year, and the average investment efficiency in network reconstruction when installing reclosers, is justified. There is presented a method to find SAIFI and SAIDI indicative reliability figures that characterize the average annual number of customer disconnections and the average annual duration of one disconnection in the electrical network.

scholarly journals Optimal Placement of Remote-Controlled Switches in Distribution Networks in the Presence of Distributed Generators

Energies ◽  
2019 ◽  
Vol 12 (6) ◽  
pp. 1025 ◽  
Author(s):  
Maziar Isapour Chehardeh ◽  
Constantine J. Hatziadoniu
Keyword(s):  
Cost Function ◽  
Distribution Networks ◽  
Optimization Method ◽  
Test System ◽  
Optimal Number ◽  
Optimal Placement ◽  
Expected Cost ◽  
Protective Devices ◽  
Distributed Generators ◽  
Optimum Placement

A two-level optimization method is presented to find the optimal number and location of conventional protective devices to be upgraded to remote-controlled switches (RCSs) for an existing distribution network (DN). The effect of distributed generation (DG) on this problem is considered. In the first level, a nonlinear binary program is proposed to maximize the restored customers subject to technical and topological constraints. All feasible interchanges between protective devices and ties involved in the restoration, when a fault occurs at all possible locations are found considering switching dependencies. In the second level, a nonlinear cost function, combining the expected cost of interruptions (ECOST) and the switch cost, is minimized with respect to the location of RCSs. The expected cost function is computed based on the optimum restoration policies obtained from the first level. The optimum placement of RCSs using the proposed algorithm is tested on a 4-feeder 1069-node test system and compared to the solution obtained with a genetic algorithm (GA) on the same system.

scholarly journals Detecting the Fault Section in the Distribution Network with Distributed Generators Based on Optimal Placement of Smart Meters

2019 ◽  
Vol 19 (2) ◽  
pp. 28-34 ◽  
Author(s):  
Majid Dashtdar ◽  
Masoud Dashtdar
Keyword(s):  
Fault Location ◽  
Voltage Drop ◽  
Distribution Network ◽  
Distribution Networks ◽  
Optimal Number ◽  
Optimal Placement ◽  
Voltage Distribution ◽  
Smart Meters ◽  
Good Efficiency ◽  
Medium Voltage

AbstractOne of the most important issues in employing distribution networks is detecting the fault location in medium-voltage distribution feeders. Due to the vastness of distribution networks and growing distributed generation (DG) sources in this network, detection is difficult with the common methods. The aim of this paper is to present a method based on voltage distributed meters in a medium-voltage distribution network (by smart meters installed along the feeder) in order to detect the fault location in the presence of DG sources. Due to vastness of distribution network and cost of installing smart meters, it is not economically possible to install meters in all the Buses of the network. That’s why in this article, combination of genetic and locating algorithms and fault-based on voltage drop has been used to suggest a method to optimize the meter locations. In order to evaluate the efficiency of the method suggested, first we determine the optimal number and location of the meters and then we apply the fault that has been simulated in different Buses of the sample network, using PSCAD/EMTDC software. After results analysis, the fault location is estimated by MATLAB. Simulation results show that the fault locating method by optimal number of meters has good efficiency and accuracy in detecting faults in different spots and in different resistance ranges.

scholarly journals A Cost-Benefit Analysis of Capacitor Allocation Problem in Radial Distribution Networks Using an Improved Stochastic Fractal Search Algorithm

Complexity ◽  
2020 ◽  
Vol 2020 ◽  
pp. 1-32
Author(s):  
Phuoc Tri Nguyen ◽  
Thi Nguyen Anh ◽  
Dieu Vo Ngoc ◽  
Tung Le Thanh
Keyword(s):  
Radial Distribution ◽  
Large Scale ◽  
Cost Benefit Analysis ◽  
Search Algorithm ◽  
Cost Benefit ◽  
Distribution Networks ◽  
Optimal Number ◽  
Solution Quality ◽  
Radial Distribution Networks ◽  
Stochastic Fractal Search

This research proposes a modified metaheuristic optimization algorithm, named as improved stochastic fractal search (ISFS), which is formed based on the integration of the quasiopposition-based learning (QOBL) and chaotic local search (CLS) schemes into the original SFS algorithm for solving the optimal capacitor placement (OCP) in radial distribution networks (RDNs). The test problem involves the determination of the optimal number, location, and size of fixed and switched capacitors at different loading conditions so that the network total yearly cost is minimized with simultaneous fulfillment of operating constraints. Also, the hourly on/off scheduling plans of switched shunt capacitors (SCs) considering a modified cost objective function are obtained. The proposed ISFS algorithm has been tested on two IEEE 69-bus and 119-bus RDNs and a practical 152-bus RDN. For clarifying the effectiveness and validation of the ISFS, the simulated results have been compared with those of other previously utilized solution approaches in the literature as well as the original SFS. From result comparison, the proposed ISFS outperforms other previous approaches regarding solution quality and statistical performance for the compared cases, especially in the complex and large-scale networks. Notably, compared with the original SFS, the proposed ISFS shows a significantly better performance in all the tested cases.

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