ABSTRACT
Computer programs are available to select the smallest solar array size for a given electrical load requirement based on continuous availability of solar energy, the storage battery operating parameters such as battery discharge rate, charge efficiency, maximum battery discharge allowed and annual battery self-discharge, and optimum tilt angle for the solar panels with most uniform output over the entire year. Based on the electrical power consumption requirements, the computer program will determine a least-expensive solar array design, number of solar modules required, and the storage battery specifications. In 1992, aerospace scientists presented the concept of a “solar power satellite” (SPS) system [1], which will convert the solar energy in space for use on earth. This SPS system converts the solar energy directly into electricity and feeds it to microwave generators forming part of a planar, phased-array transmitting antenna. This high-gain, electronic steering antenna would direct a microwave beam to one or more high-gain receiving antennas at appropriate locations on earth. This high power microwave energy would be efficiently converted into electricity, which can be transmitted and distributed for customer use. This SPS system will be discussed later on with emphasis on reliability and economics.
