Power distribution systems - Project examples
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Eritrea - Solar PV Mini-Grids for two Rural Towns and Surrounding Villages
Eritrea’s energy supply system is characterized by massive dependence on traditional biomass fuels to cover its domestic energy requirements, a lack of easy access by the majority of the country’s population to modern energy; and total reliance on imported oil as a source of modern energy. Less than 10% of Eritreans in rural areas have access to electricity. Therefore, an effort by the Ministry of Energy and Mines and international donor organizations is made to promote rural electrification through sustainable sources.
The present project included the design and tendering of two mini-grid PV systems in Areza and Maidma (total 2.25MWp PV), designed as hybrid plants with storage units (3.4 MWh Li-Ion Battery), and diesel gen-sets (5 gensets; total 1.3 MVA). The renewable energy fraction of the system is higher than 70%. The local distribution grid was designed and tendered by Eritrea Electric Corporation and the generation side was handled by intec.
intec's services
- Detailed demand assessment and forecasts
- Design of the two hybrid systems (PV, diesel, battery storage) including their synchronisation with the distribution system and related components (site assessments, PV energy yield assessments, system sizing, design, project budget) as well as optimization for Levelized Electricity Cost
- Preparation of (a) tender dossier(s) for supply and installation, in compliance with EU/EDF procurement regulations, including BoQ and detailed technical specifications
- Support during the tender period
- Assistance in bid evaluation and contract preparation
Client
Ministry of Energy and MinesFinancing
European CommissionPeriod of implementation
12.2015 - 01.2017 -
Regional - Interconnexion Project CLSG (Phase 1)
The project included Owner's Engineer services for all pre-construction activities (tender documents, tendering, contract negotiations and award) for the construction of the following equipment:
- 1,303 km of 225 kV overhead line across the four countries, initially with one circuit on double circuit steel lattice towers, with OPGW,
- 12 new 225 kV substations, 1 in Côte d'Ivoire, 4 in Liberia, 5 in Sierra Leone and 2 in Guinea,
- installation of compensation equipment, static VAr compensators and shunt reactance in 5 substations,
- development of a control centre in Guinea including a regional SCADA system and frequency control systems, and extension of the NCC in Côte d'Ivoire,
- development of a frequency regulation study and procurement and installation of frequency control equipment.
Construction works are executed under 13 different EPC contracts.
intec's services
intec's experts contributed to the following tasks:
- Data collection and review of existing documentation,
- Review and finalisation of technical specifications and of prequalification and tender documents,
- Assistance during the tendering phase (invitations for prequalifications / tenders; evaluation of prequalifications and bid evaluation including respective reporting),
- Assistance in the finalisation of the EPC contracts (contract negotiations, preparation of contract documents),
- Review of project implementation schedules and preparation of the project implementation plan (PIP).
Client
WAPP Secretariat on behalf of TRANSCO CLSGFinancing
European Investment Bank (EIB) and World Bank (WB)Period of implementation
09.2014 - 12.2016 -
Mali - PASE - Extension of EDM's Transmission and Distribution Networks
The project was part of the "PASE" (Project for the Support to the Energy Sector) for which the World Bank granted a loan to the Government of Mali. The project in general aimed at improving access to electricity, and efficiency in the supply and utilisation of electrical energy. The technical measures of the project included the following components:
- Extension of the MV/LV networks in Bamako and Kati,
- Construction of the 30 kV Kati Substation,
- Reinforcement and extension of the MV/LV networks in Kayes, Sikasso, Koutiala, and Ségou,
- Rehabilitation of the 150 kV lines Bamako - Fana and Fana - Ségou and restructuring of Fana substation connection from T-off to line-in line-out arrangement,
- Extension of the Kalabancoro Substation (transformer 60 MVA, 150/30 kV) and renewal of the 30/15 kV Sotuba Substation,
- Extension of the 15 kV SOGEM Substation in Kodialani and installation of 15 kV outgoing feeders,
- Installation of the second circuit on the 150 kV Kodialani - Sirakoro line.
intec's services
- Overall project management and home-office back-up support for specific tasks,
- Coordination of the detailed implementation plan with EDM,
- Approval of technical documents and implementation studies,
- Technical control of plans and documents,
- Factory acceptance tests, monitoring and control of manufacturing,
- Site supervision,
- Budget control and management,
- Implementation of the quality management plan and the health and safety plans,
- Verification of the environmental protection plan,
- Reporting.
Client
Energie du Mali S.A. (EDM)Financing
International Development Association (IDA)Period of implementation
02.2014 - 07.2016
Eritrea - Solar PV Mini-Grids for two Rural Towns and Surrounding Villages
Eritrea’s energy supply system is characterized by massive dependence on traditional biomass fuels to cover its domestic energy requirements, a lack of easy access by the majority of the country’s population to modern energy; and total reliance on imported oil as a source of modern energy. Less than 10% of Eritreans in rural areas have access to electricity. Therefore, an effort by the Ministry of Energy and Mines and international donor organizations is made to promote rural electrification through sustainable sources.
The present project included the design and tendering of two mini-grid PV systems in Areza and Maidma (total 2.25MWp PV), designed as hybrid plants with storage units (3.4 MWh Li-Ion Battery), and diesel gen-sets (5 gensets; total 1.3 MVA). The renewable energy fraction of the system is higher than 70%. The local distribution grid was designed and tendered by Eritrea Electric Corporation and the generation side was handled by intec.
intec's services
- Detailed demand assessment and forecasts
- Design of the two hybrid systems (PV, diesel, battery storage) including their synchronisation with the distribution system and related components (site assessments, PV energy yield assessments, system sizing, design, project budget) as well as optimization for Levelized Electricity Cost
- Preparation of (a) tender dossier(s) for supply and installation, in compliance with EU/EDF procurement regulations, including BoQ and detailed technical specifications
- Support during the tender period
- Assistance in bid evaluation and contract preparation
Client
Ministry of Energy and MinesFinancing
European CommissionPeriod of implementation
12.2015 - 01.2017Regional - Interconnexion Project CLSG (Phase 1)
The project included Owner's Engineer services for all pre-construction activities (tender documents, tendering, contract negotiations and award) for the construction of the following equipment:
- 1,303 km of 225 kV overhead line across the four countries, initially with one circuit on double circuit steel lattice towers, with OPGW,
- 12 new 225 kV substations, 1 in Côte d'Ivoire, 4 in Liberia, 5 in Sierra Leone and 2 in Guinea,
- installation of compensation equipment, static VAr compensators and shunt reactance in 5 substations,
- development of a control centre in Guinea including a regional SCADA system and frequency control systems, and extension of the NCC in Côte d'Ivoire,
- development of a frequency regulation study and procurement and installation of frequency control equipment.
Construction works are executed under 13 different EPC contracts.
intec's services
intec's experts contributed to the following tasks:
- Data collection and review of existing documentation,
- Review and finalisation of technical specifications and of prequalification and tender documents,
- Assistance during the tendering phase (invitations for prequalifications / tenders; evaluation of prequalifications and bid evaluation including respective reporting),
- Assistance in the finalisation of the EPC contracts (contract negotiations, preparation of contract documents),
- Review of project implementation schedules and preparation of the project implementation plan (PIP).
Client
WAPP Secretariat on behalf of TRANSCO CLSGFinancing
European Investment Bank (EIB) and World Bank (WB)Period of implementation
09.2014 - 12.2016Mali - PASE - Extension of EDM's Transmission and Distribution Networks
The project was part of the "PASE" (Project for the Support to the Energy Sector) for which the World Bank granted a loan to the Government of Mali. The project in general aimed at improving access to electricity, and efficiency in the supply and utilisation of electrical energy. The technical measures of the project included the following components:
- Extension of the MV/LV networks in Bamako and Kati,
- Construction of the 30 kV Kati Substation,
- Reinforcement and extension of the MV/LV networks in Kayes, Sikasso, Koutiala, and Ségou,
- Rehabilitation of the 150 kV lines Bamako - Fana and Fana - Ségou and restructuring of Fana substation connection from T-off to line-in line-out arrangement,
- Extension of the Kalabancoro Substation (transformer 60 MVA, 150/30 kV) and renewal of the 30/15 kV Sotuba Substation,
- Extension of the 15 kV SOGEM Substation in Kodialani and installation of 15 kV outgoing feeders,
- Installation of the second circuit on the 150 kV Kodialani - Sirakoro line.
intec's services
- Overall project management and home-office back-up support for specific tasks,
- Coordination of the detailed implementation plan with EDM,
- Approval of technical documents and implementation studies,
- Technical control of plans and documents,
- Factory acceptance tests, monitoring and control of manufacturing,
- Site supervision,
- Budget control and management,
- Implementation of the quality management plan and the health and safety plans,
- Verification of the environmental protection plan,
- Reporting.
Client
Energie du Mali S.A. (EDM)Financing
International Development Association (IDA)Period of implementation
02.2014 - 07.2016-
Bangladesh - New 132/33 GIS substations, a new cable system and a 4-circuit 132 kV transmission line
The project shall contribute to the Sustainable Power Sector Development Program II by securing proper voltage levels, and thus reducing transmission losses. This improvement of the transmission system is necessary to achieve a sustainable restructuring of the power sector. The project includes the following measures:
- Lot 1 - Substations: Construction of new 132/33 kV GIS substations at Lalbagh and Madertak, and conversion of 132/33 kV Dhanmodi transformer station into a regular substation, including construction of an additional 132 kV bay (one and a half breaker scheme) at Rampura Substation
- Lot 2 - Cable system: Construction of a new 132 and 33 kV underground cable system
- Lot 3 -Transmission lines: Construction of 4-circuit 132 kV overhead transmission lines, including a river crossing
intec's services
- Assistance to PIU in evaluation of bids; Formulation of notice of award recommendation
- Assistance in contract negotiations
- Control of contractor's time schedule
- Assist contractor in obtaining permits and way leave rights
- Approval of Contractor's/Suppliers' design
- Participation in factory acceptance tests
- Approval of final design and as built design
- Supervision of construction
- Budget control and review of invoices
- Monitoring of training programme
- Assistance to PIU in establishing an operations and maintenance concept
- Assistance in commissioning and assistance during defects liability and warranty period
Client
Dhaka Power Distribution Company Ltd. (DPDC)Financing
KfW EntwicklungsbankPeriod of implementation
06.2009 - 06.2016 -
Guinea - Development Scheme for the Electrical Networks of Conakry
With the perspective to develop the country's electricity sector, the Government of Guinea decided to give a new momentum to the country's electrification programme so as to improve citizen's lifestyle, productivity and earnings. For this purpose, the Government sought the financial support of the African Development Bank for the implementation of the rural electrification project.
The study on the development scheme for the electrical networks of Conakry consists of the preparation of a programme for the improvement of electricity allocation from the transmission towards the distribution network by means of the following:
- construction or renovation of substations,
- restructuring and rehabilitation of the medium-voltage network,
- replacement of medium-/low-voltage substations,
- rehabilitation and extension of the low-voltage network.
intec's services
- Inventory and diagnostics of electricity transmission and distribution in Conakry,
- Feasibility and implementation study for the optimum development scheme of the electrical networks and elaboration of the tender dossier,
- Environmental and social impact study.
Client
Electricité de Guinée (EDG)Financing
African Development FundPeriod of implementation
04.2012 - 06.2016 -
Burkina Faso - Reinforcement of Electrical Infrastructure and on Rural Electrification (PRIELER):
Objective of this project was the elaboration of draft studies that deliver sufficient justification for the implementation of the following works:
- Restructuring and extension of the electrical networks of Ouagadougou,
- Construction of the 132 kV interconnection line Zano - Koupèla.
Design studies, preliminary cost estimates, time schedules, detailed design, and tender dossiers were prepared to determine all requirements for an efficient implementation of the two projects.
A feasibility study was carried out for the interconnection line Zano - Koupèla resulting in the detailed design for the line, including line route study, environmental and social impact assessment (ESIA), and the choice of the substation locations.
intec's services
- Determination of the technical feasibility of the two projects;
- Preliminary engineering studies;
- Determination of the economic and financial feasibility of the projects;
- Preparation of detailed design for the two projects;
- Preparation of tender documents;
- Capacity building for the staff of SONABEL and PRIELER through training and transfer of technical know-how.
Client
Société National d'Electricité du Burkina - SONABELFinancing
African Development BankPeriod of implementation
07.2011 - 03.2016
Bangladesh - New 132/33 GIS substations, a new cable system and a 4-circuit 132 kV transmission line
The project shall contribute to the Sustainable Power Sector Development Program II by securing proper voltage levels, and thus reducing transmission losses. This improvement of the transmission system is necessary to achieve a sustainable restructuring of the power sector. The project includes the following measures:
- Lot 1 - Substations: Construction of new 132/33 kV GIS substations at Lalbagh and Madertak, and conversion of 132/33 kV Dhanmodi transformer station into a regular substation, including construction of an additional 132 kV bay (one and a half breaker scheme) at Rampura Substation
- Lot 2 - Cable system: Construction of a new 132 and 33 kV underground cable system
- Lot 3 -Transmission lines: Construction of 4-circuit 132 kV overhead transmission lines, including a river crossing
intec's services
- Assistance to PIU in evaluation of bids; Formulation of notice of award recommendation
- Assistance in contract negotiations
- Control of contractor's time schedule
- Assist contractor in obtaining permits and way leave rights
- Approval of Contractor's/Suppliers' design
- Participation in factory acceptance tests
- Approval of final design and as built design
- Supervision of construction
- Budget control and review of invoices
- Monitoring of training programme
- Assistance to PIU in establishing an operations and maintenance concept
- Assistance in commissioning and assistance during defects liability and warranty period
Client
Dhaka Power Distribution Company Ltd. (DPDC)Financing
KfW EntwicklungsbankPeriod of implementation
06.2009 - 06.2016Guinea - Development Scheme for the Electrical Networks of Conakry
With the perspective to develop the country's electricity sector, the Government of Guinea decided to give a new momentum to the country's electrification programme so as to improve citizen's lifestyle, productivity and earnings. For this purpose, the Government sought the financial support of the African Development Bank for the implementation of the rural electrification project.
The study on the development scheme for the electrical networks of Conakry consists of the preparation of a programme for the improvement of electricity allocation from the transmission towards the distribution network by means of the following:
- construction or renovation of substations,
- restructuring and rehabilitation of the medium-voltage network,
- replacement of medium-/low-voltage substations,
- rehabilitation and extension of the low-voltage network.
intec's services
- Inventory and diagnostics of electricity transmission and distribution in Conakry,
- Feasibility and implementation study for the optimum development scheme of the electrical networks and elaboration of the tender dossier,
- Environmental and social impact study.
Client
Electricité de Guinée (EDG)Financing
African Development FundPeriod of implementation
04.2012 - 06.2016Burkina Faso - Reinforcement of Electrical Infrastructure and on Rural Electrification (PRIELER):
Objective of this project was the elaboration of draft studies that deliver sufficient justification for the implementation of the following works:
- Restructuring and extension of the electrical networks of Ouagadougou,
- Construction of the 132 kV interconnection line Zano - Koupèla.
Design studies, preliminary cost estimates, time schedules, detailed design, and tender dossiers were prepared to determine all requirements for an efficient implementation of the two projects.
A feasibility study was carried out for the interconnection line Zano - Koupèla resulting in the detailed design for the line, including line route study, environmental and social impact assessment (ESIA), and the choice of the substation locations.
intec's services
- Determination of the technical feasibility of the two projects;
- Preliminary engineering studies;
- Determination of the economic and financial feasibility of the projects;
- Preparation of detailed design for the two projects;
- Preparation of tender documents;
- Capacity building for the staff of SONABEL and PRIELER through training and transfer of technical know-how.
Client
Société National d'Electricité du Burkina - SONABELFinancing
African Development BankPeriod of implementation
07.2011 - 03.2016-
Guinea - Regional Dispatching Centre in Conakry
Construction of a regional dispatching centre (RDC) in Conakry in order to manage the MV systems, to optimize energy distribution in the different quarters of Conakry and to reduce losses. The RDC will complete the EMS functions of the national dispatching centre (NDC), and certain interfaces will be integrated to ensure the ex-change of information between the two dispatching centres.
intec's services
Phase I - Detailed Design
- Network study, including load distribution in the city's distribution network, definition of the telecontrol cri-teria and of the dispatching centre's special requirements
- Design study: definition of the SCADA/DMS system architecture and of communication protocols, inventory of equipment in the MV/LV distribution substations and adaptation works, recommendations for the structure of dispatching, assessment of costs, preparation of the project schedule and the draft design report.
Phase II - Tender Documents
- Elaboration of the technical specifications and definition of the scope of supply
- Preparation of the instructions to tenderers, the general and special contract conditions and of adminis-trative and technical tender forms.
Phase III - Tender Procedure and Award of Contract for Supply and Works
- Assistance to EDG in launching the tender
- Bid evaluation
- Contract negotiations.
Training: During all three phases of the project, the Consultant will integrate the project counterparts into his team in order to provide them with on-the-job training.
Client
Electricité de Guinée (EDG)Financing
Electricité de Guinée (EDG)Period of implementation
04.2015 02.2016 -
Pakistan - Study to Determine the Limit of Integrating Intermittent Renewable (Wind & Solar) Resources onto Pakistan National Grid
The Government of Pakistan encourages the development of renewable energy to close the gap between electricity demand and supply. The National Transmission and Dispatch Company (NTDC) is already in the process of integrating wind power, and many large and small solar parks have been added to NDTC's pipeline. NDTC requested to conduct the present power system study to clarify the limits of integrating RE into Pakistan's grid. The study includes the following subjects:
- Planning studies (load flow, dynamic and transient stability, impact of fault levels on substation protection and design, reactive power and voltage control, power quality issues, system flexibility requirements, system's frequency response)
- Operational studies (operation and control strategy, dispatch policy, methodology to forecast wind and solar power availability, determination of active spinning reserve)
- Financial analysis (determination of financial impact of wind and solar energy resources on Pakistan's overall energy mix)
All activities are closely coordinated with NTDC and the Alternative Energy Development Board (AEDB).
intec's services
- Overall project management and coordination;
- Data collection and organisation of local support activities;
- Coordination of planning studies;
- Development of the methodology to forecast wind and solar power availability;
- Presentation, discussion and agreement with NTDC and AEDB of the operational studies;
- Financial analysis, i.e. the determination of the financial impact of wind and solar energy resources on Pakistan's overall energy mix and the corresponding consumer prices. This analysis considers cost and price projection scenarios for the time horizon until the year 2022 and an assessment of the financial benefits of the Clean Development Mechanism (CDM).
Client
Advanced Engineering Associates International, Inc.Financing
USAID Energy Policy ProgramPeriod of implementation
11.2014 - 12.2015 -
Palestine - Solar PV for the North Gaza Emergency Sewage Treatment Plant
The Palestinian Water Authority (PWA) commissioned Phase 1 of the "North Gaza Emergency Sewage Treatment (NGEST) Project", which requires a total of 12 MW of electric power under full operation conditions. Several potential sources of power supply for the NGEST had been considered, but all of them were discounted for various reasons.
The present study, commissioned by the World Bank in collaboration with PWA and the Palestinian Energy and Natural Resource Authority (PENRA), assessed the feasibility of supplying NGEST with electricity generated from solar power sources.
intec's services
Assessment of life-cycle electrical load of the NGEST plant (max. 12 MW at full operation)
List and review options for power supply to NGEST (on-site diesel generation, additional power supply from Israel through a dedicated feeder, additional supply through expansion of the GPP's capacity - practicability, risks and assessment of levelized costs)
Assessment of the feasibility of solar PV power generation to meet at least part of NGEST's demand, i.e.
- resource availability - collection and interpretation of available data
- back-up power supply / batteries
- local infrastructure issues
- conceptual design and detailed costing
- preliminary environmental and social impact assessment
- economic and financial analysis
- development of an EPC contract format and determination of operation and maintenance requirements
- assessment of the potential impact of the local political environment on the project.
Client
World BankFinancing
World BankPeriod of implementation
12.2014 - 12.2015
Guinea - Regional Dispatching Centre in Conakry
Construction of a regional dispatching centre (RDC) in Conakry in order to manage the MV systems, to optimize energy distribution in the different quarters of Conakry and to reduce losses. The RDC will complete the EMS functions of the national dispatching centre (NDC), and certain interfaces will be integrated to ensure the ex-change of information between the two dispatching centres.
intec's services
Phase I - Detailed Design
- Network study, including load distribution in the city's distribution network, definition of the telecontrol cri-teria and of the dispatching centre's special requirements
- Design study: definition of the SCADA/DMS system architecture and of communication protocols, inventory of equipment in the MV/LV distribution substations and adaptation works, recommendations for the structure of dispatching, assessment of costs, preparation of the project schedule and the draft design report.
Phase II - Tender Documents
- Elaboration of the technical specifications and definition of the scope of supply
- Preparation of the instructions to tenderers, the general and special contract conditions and of adminis-trative and technical tender forms.
Phase III - Tender Procedure and Award of Contract for Supply and Works
- Assistance to EDG in launching the tender
- Bid evaluation
- Contract negotiations.
Training: During all three phases of the project, the Consultant will integrate the project counterparts into his team in order to provide them with on-the-job training.
Client
Electricité de Guinée (EDG)Financing
Electricité de Guinée (EDG)Period of implementation
04.2015 02.2016Pakistan - Study to Determine the Limit of Integrating Intermittent Renewable (Wind & Solar) Resources onto Pakistan National Grid
The Government of Pakistan encourages the development of renewable energy to close the gap between electricity demand and supply. The National Transmission and Dispatch Company (NTDC) is already in the process of integrating wind power, and many large and small solar parks have been added to NDTC's pipeline. NDTC requested to conduct the present power system study to clarify the limits of integrating RE into Pakistan's grid. The study includes the following subjects:
- Planning studies (load flow, dynamic and transient stability, impact of fault levels on substation protection and design, reactive power and voltage control, power quality issues, system flexibility requirements, system's frequency response)
- Operational studies (operation and control strategy, dispatch policy, methodology to forecast wind and solar power availability, determination of active spinning reserve)
- Financial analysis (determination of financial impact of wind and solar energy resources on Pakistan's overall energy mix)
All activities are closely coordinated with NTDC and the Alternative Energy Development Board (AEDB).
intec's services
- Overall project management and coordination;
- Data collection and organisation of local support activities;
- Coordination of planning studies;
- Development of the methodology to forecast wind and solar power availability;
- Presentation, discussion and agreement with NTDC and AEDB of the operational studies;
- Financial analysis, i.e. the determination of the financial impact of wind and solar energy resources on Pakistan's overall energy mix and the corresponding consumer prices. This analysis considers cost and price projection scenarios for the time horizon until the year 2022 and an assessment of the financial benefits of the Clean Development Mechanism (CDM).
Client
Advanced Engineering Associates International, Inc.Financing
USAID Energy Policy ProgramPeriod of implementation
11.2014 - 12.2015Palestine - Solar PV for the North Gaza Emergency Sewage Treatment Plant
The Palestinian Water Authority (PWA) commissioned Phase 1 of the "North Gaza Emergency Sewage Treatment (NGEST) Project", which requires a total of 12 MW of electric power under full operation conditions. Several potential sources of power supply for the NGEST had been considered, but all of them were discounted for various reasons.
The present study, commissioned by the World Bank in collaboration with PWA and the Palestinian Energy and Natural Resource Authority (PENRA), assessed the feasibility of supplying NGEST with electricity generated from solar power sources.
intec's services
Assessment of life-cycle electrical load of the NGEST plant (max. 12 MW at full operation)
List and review options for power supply to NGEST (on-site diesel generation, additional power supply from Israel through a dedicated feeder, additional supply through expansion of the GPP's capacity - practicability, risks and assessment of levelized costs)
Assessment of the feasibility of solar PV power generation to meet at least part of NGEST's demand, i.e.
- resource availability - collection and interpretation of available data
- back-up power supply / batteries
- local infrastructure issues
- conceptual design and detailed costing
- preliminary environmental and social impact assessment
- economic and financial analysis
- development of an EPC contract format and determination of operation and maintenance requirements
- assessment of the potential impact of the local political environment on the project.