POWER TRANSMISSION SYSTEM INCLUDING MULTIPHASE ALTERNATING-CURRENT POWER SUPPLIES AND LOADS, AND CAPABLE OF TRANSMITTING POWER BETWEEN DIFFERENT TYPES OF POWER SUPPLIES AND LOADS

The power transmitter apparatus is provided with code modulators which modulate powers of phase components of three-phase alternating-current power to generate code-modulated waves, respectively, by code modulation using modulation codes based on code sequences different from each other, and transmits the code-modulated waves to the at least one power receiver apparatus via the transmission path. The power receiver apparatus is provided with code demodulators, each of which demodulates one code-modulated wave of the received code-modulated waves to generate code-demodulated power by code demodulation using a demodulation code based on a code sequence identical to the code sequence of the modulation code used for the code modulation of the one code-modulated wave, the code-demodulated power being generated as power of one of phase components of multiphase alternating-current power.