Certification and accreditation systems, as internationally recognized means to verify capabilities and build trust, play a significant role in ensuring quality and safety, promoting technological advancement, and fostering social development. These systems originated in the UK, were refined in developed regions such as Europe and the United States, and were introduced to China in the 1980s. Countries with high proportions of renewable energy installations, such as Germany and Spain, have established third-party grid integration certification schemes for renewable energy power generation, driving continuous development and progress in grid integration technologies.