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194 kilowatt solar photovoltaic flat panel power system for the combined Beverly High School/C. H. Patten Vocational High School, Beverly, Massachusetts. Final technical report, October 1, 1978-March 31, 1979

Technical Report ·
OSTI ID:5354946
;
The 194 kW system consists of the photovoltaic array, the inverter/control subsystem, the building and utility interface, and the monitoring subsystem. The photovoltaic array consists of 56 separate subarrays of 112 photovoltaic modules each, deployed in rows on the southerly facing slope north of the school building. The wiring scheme permits individual modules to be disconnected without a radical change in subarray output current. Power is transmitted at 4160 V from the inverters and a step-up transformer to the main 4160 V utility feed line in the school. Separate metering measures power bought and sold. At the optimum tilt angle of 40/sup 0/, the array provides 232 MWh of ac energy annually, or 17% of the school load. It provides a good match to the summer daily load profile, resulting primarily from the central air-conditioning. Some power is sold to the utility throughout the year, mainly on weekends. The immediate impact is an $8000 saving in the annual utility bill. Levelized busbar energy costs are reduced from $2/kWh to $1/kWh when site-specific parameters are used in the analysis instead of the JPL-specified nominal values. A fault detection and isolation scheme which can find a single module failure is incorporated into the monitoring subsystem.
Research Organization:
Solar Power Corp., Woburn, MA (USA)
DOE Contract Number:
AC04-78ET23064
OSTI ID:
5354946
Report Number(s):
DOE/ET/23064-1
Country of Publication:
United States
Language:
English

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Related Subjects

14 SOLAR ENERGY
140600* -- Solar Energy-- Photovoltaic Power Systems
BUILDINGS
CONTROL
CONTROL SYSTEMS
DESIGN
DIAGRAMS
ECONOMIC ANALYSIS
ECONOMICS
EDUCATIONAL FACILITIES
ELECTRICAL EQUIPMENT
ELECTRONIC CIRCUITS
ELECTRONIC EQUIPMENT
ENVIRONMENTAL IMPACTS
EQUIPMENT
EQUIPMENT INTERFACES
FABRICATION
INTERCONNECTED POWER SYSTEMS
INVERTERS
MASSACHUSETTS
MATHEMATICAL MODELS
MONITORING
NORTH AMERICA
NORTH ATLANTIC REGION
OPTIMIZATION
PERFORMANCE
PHOTOVOLTAIC POWER SUPPLIES
PLANNING
POWER CONDITIONING CIRCUITS
POWER RANGE 100-1000 KW
POWER SUPPLIES
POWER SYSTEMS
PROCUREMENT
QUALITY CONTROL
SCHOOL BUILDINGS
SHADING
SOLAR EQUIPMENT
SPECIFICATIONS
SYSTEMS ANALYSIS
USA