Space Demonstration Experiment Towards Practical Solar Power Satellite

In Japan, Solar Power Satellite (SPS) is being developed as a promising power generation system. In recent years, it has also been studied as a lunar energy system. For a practical SPS, a long-distance Wireless Power Transmission (WPT) technology is one of the inherent and most critical technologies. Some demonstration experiments of the WPT system were conducted toward a practical SPS in Japan. We will introduce demonstrations conducted on the ground and the space experiment currently underway.