Flexible Adjustment Method for Power Grid with High-Proportion Clean Energy

Aiming at the influence of the access of high-proportion clean energy into the power grid, a comprehensive regulation model for such multiple energy as hydropower, thermal power, time-shiftable load, battery energy storage, electric thermal storage and nuclear power as well as the tie line and frequency was proposed. Through combing the operational characteristics, the operation process of power grid was divided into normal regulation domain, abnormal regulation domain and emergency control domain, and the unconventional peak regulation of thermal power unit was classified into the abnormal regulation domain. The flexible adjustment precaution calculation and monitoring method for the power was established, which could provide the basis for the monitoring and control of the operation of power grid. The results show that the characteristics of each stage in the operation of power grid are different, and the required adjustment variables are also different. Similarly, the characteristics of each operation variable are different. Therefore, the division of three operational domains is in line with the actual operation of power grid.