Abstract: As new energy source accounts for more than 20% in some power grids, grid operation faces many new difficulties and challenges. There is an urgent need that these new energy source, especially the photovoltaic power generation system with insulated gate bipolar transistor（IGBT）-based inverters, supports the fast power control and primary frequency/voltage regulations. For this reason, a system 100 ms-level fast power regulation scheme for new energy sources was proposed. This paper put forward an upgrading scheme for the existing stability control system, in order to realize the two-way rapid adjustment of the power generation, rather than tripping the whole plant. Meanwhile, a fast power control device was designed, supported by the leaping maximum power point tracking（MPPT） algorithm and integrated inverter power platform. The scheme has been applied in China’s Tibet Power Grid. The actual test results on site indicated that the power control response time inside the station is within 30 ms, and the power control response time of the entire network in Tibet is within 60 ms, satisfying the design goal of less than 100 ms. The test and operation results of the Tibet Power Grid verify the effectiveness and advancement of the technology.