This thesis contribution involves improving the initial concept of the GISEle tool, and apply it to a real case rural electrification planning under the supervision of the partner company Enel Global Infrastructure and Networks S.r.l (Enel GI&N). The results obtained by the least-cost topology of GISEle was considered too simplistic when compared to the real distribution grids. The goal is to better represent the hierarchical structure of an electric network that is usually composed by a high power main branch that connects densely populated areas, and its low power derivations (called collaterals) that connects sparse populated areas. The results of this rural electrification analysis, which focus only on the topological aspect and does not consider other important factors such as system reliability and quality of service, suggests that that it is possible to reach up to 100% of the local population through an expansion of the distribution network. The new main branch and collaterals approach that was developed, managed to reduce up to 47% the total investment cost in line deployment in respect to the initial GISEle approach. With the previous assumptions, the total length of lines necessary to achieve 100% electrification was 1635 km, with a total investment cost of 33.93 million euros.The average cost per person connected went from 5212 euros in the standard approach to 2785 euros using the main branch and collaterals (if households are considered, the average cost is 17199 euros in the standard approach and 9190 with the main branch and collaterals approach).This cost reduction suggests that an optimized electrification strategy through better routing could shift the balance point between on-grid and off-grid solutions such as the use of microgrids and PV generation. Within this thesis work, the tradeoff between the percentage of people connected and the cost per person connected and, due to DSO request, the cost necessary to achieve 100% electrification was assessed. The results validate not only the technicality of the approach proposed, by the cost optimization achieved, but also the topological aspect of the grid created by GISEle, which is similar to the existent MV distribution grid.
Questo contributo di tesi si pone come obiettivo il miglioramento delle funzionalità dello strumento GISEle e l’applicazione di detto Strumento su un caso di elettrificazione di un area rurale, con il supporto della società partner Enel Global Infrastructure and Networks S.r.l (Enel GI&N).I risultati di questa analisi di elettrificazione rurale, che si concentrano solo sull’aspetto topologico e non rendono in considerazione altri fattori importanti come l’affidabilità del sistema e la qualità del servizio, suggeriscono che è possibile un’espansione della rete di distribuzione che raggiunge il 100% della popolazione locale. Il nuovo approccio dorsali e derivazioni sviluppato, è riuscito a ridurre fino al 47% del costo totale dell’investimento nella distribuzione in linea rispetto all’approccio GISEle iniziale. La lunghezza totale delle linee necessarie per raggiungere l’elettrificazione al 100% era di 1635 km, con un costo di investimento totale di 33,93 milioni di euro. Il costo per persona collegato è passato da 5212 euro nell’approccio standard a 2785 euro utilizzando i dorsali e derivazioni. Se si considerano le cliente, l’approccio standard ha portato a 17199 euro per cliente connesso, mentre l’approccio principale di filiali e collaterali 9190 euro. Esiste un compromesso tra la percentuale di persone connesse e il costo per persona connessa che è stato valutato nell’ambito di questo lavoro di tesi, tuttavia, a causa della richiesta del DSO, il raggiungimento dell’elettrificazione al 100% è stato impostato come prioritario.I risultati confermano non solo la tecnicità dell’approccio proposto, dall’ottimizzazione dei costi raggiunta, ma anche l’aspetto topologico della rete creata da GISEle, che è simile alla rete di distribuzione MT esistente.
GIS-based strategy for distribution grid planning in rural areas
GADELHA TEIXEIRA FILHO, VINICIUS
2018/2019
Abstract
This thesis contribution involves improving the initial concept of the GISEle tool, and apply it to a real case rural electrification planning under the supervision of the partner company Enel Global Infrastructure and Networks S.r.l (Enel GI&N). The results obtained by the least-cost topology of GISEle was considered too simplistic when compared to the real distribution grids. The goal is to better represent the hierarchical structure of an electric network that is usually composed by a high power main branch that connects densely populated areas, and its low power derivations (called collaterals) that connects sparse populated areas. The results of this rural electrification analysis, which focus only on the topological aspect and does not consider other important factors such as system reliability and quality of service, suggests that that it is possible to reach up to 100% of the local population through an expansion of the distribution network. The new main branch and collaterals approach that was developed, managed to reduce up to 47% the total investment cost in line deployment in respect to the initial GISEle approach. With the previous assumptions, the total length of lines necessary to achieve 100% electrification was 1635 km, with a total investment cost of 33.93 million euros.The average cost per person connected went from 5212 euros in the standard approach to 2785 euros using the main branch and collaterals (if households are considered, the average cost is 17199 euros in the standard approach and 9190 with the main branch and collaterals approach).This cost reduction suggests that an optimized electrification strategy through better routing could shift the balance point between on-grid and off-grid solutions such as the use of microgrids and PV generation. Within this thesis work, the tradeoff between the percentage of people connected and the cost per person connected and, due to DSO request, the cost necessary to achieve 100% electrification was assessed. The results validate not only the technicality of the approach proposed, by the cost optimization achieved, but also the topological aspect of the grid created by GISEle, which is similar to the existent MV distribution grid.File | Dimensione | Formato | |
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https://hdl.handle.net/10589/153500