POWER TRANSMISSION APPARATUS, POWER RECEPTION APPARATUS, METHOD FOR CONTROLLING WIRELESS POWER TRANSMISSION SYSTEM, AND STORAGE MEDIUM

A wireless power transmission system wirelessly transmits power from a power transmission apparatus to a power reception apparatus. The system performs detection processing using a first detection method for detecting an object different from the power reception apparatus. The system determines whether a predetermined condition related to a state of at least either one of the power transmission apparatus and the power reception apparatus is satisfied. Then, the system performs object detection processing using a second detection method, different from the first detection method, according to a result of the determination regarding whether the predetermined condition is satisfied.