New concepts on MV distribution from insulated shield wires of HV lines
- Rome Univ. (Italy)
- L'Aquila Univ. (Italy). Ist. di Fisica
- Volta River Authority (GH)
The paper deals with the problem of the most cost effective power supply to the villages and communities of developing countries, located along the route of HV lines, up to 100 km distant from the HV/MV transformer stations. In the first part of the paper a novel solution is presented. This consists of: (i) insulation of the shield wire(s) of an HV line, and wire(s) energization at MV (10 to 34.5 kV) from the closest transformer station; (ii) supply of villages along the line route by means of standard MV/LV distribution transformers connected between the shield wire(s) and ground. Four different schemes are presented, two of them suitable for single-phase distribution, the others for 3-phase supply. The behaviour in steady-state and in transient conditions is analyzed. The second part of the paper reports the positive results of 33 months of operation of an experimental scheme tested in Ghana for supply of single-phase and 3-phase loads from the two insulated shield wires of a 161 kV line. Finally the paper describes the distribution schemes along 407 km of new 161 kV lines in Northern Ghana, where the novel solution is applied to supply power to both domestic and industrial loads in 12 small towns with a design aggregate load of 5000 kW.
- OSTI ID:
- 5429462
- Journal Information:
- IEEE Transactions on Power Delivery; (USA), Vol. 4:4; ISSN 0885-8977
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
POLICY AND ECONOMY
24 POWER TRANSMISSION AND DISTRIBUTION
20 FOSSIL-FUELED POWER PLANTS
DEVELOPING COUNTRIES
HVDC SYSTEMS
GHANA
ELECTRIC POWER
RURAL AREAS
POWER SUPPLIES
COST BENEFIT ANALYSIS
DESIGN
ELECTRICAL INSULATION
ELECTRICAL TRANSIENTS
LOAD MANAGEMENT
PLANNING
POWER DISTRIBUTION SYSTEMS
TRANSFORMERS
AFRICA
DC SYSTEMS
ELECTRICAL EQUIPMENT
ELECTRONIC EQUIPMENT
ENERGY SYSTEMS
EQUIPMENT
MANAGEMENT
POWER
POWER SYSTEMS
TRANSIENTS
VOLTAGE DROP
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200300 - Electric Power Engineering- Power Transmission & Distribution- (-1989)
200104 - Fossil-Fueled Power Plants- Components