Evaluation of New Energy Accommodation Capacity of Power System Based on Time Series Production Simulation

The main factors limiting the grid-connected accommodation of new energy are theoretically studied from the standpoint of new energy accommodation. As assessment indices of the grid connection's capability for new energy accommodation, the amount of abandoned electricity, the rate of abandoned electricity, and the number of hours of power generating utilization are utilized. An annual time series production simulation model is established that takes into account the grid connection of large-scale new energy generation while taking into account factors like system peaking capacity, power balance, system reserve capacity, conventional unit output, system transmission capacity, and energy storage constraints, among others. The accommodation simulation is performed using a power grid from a new energy enrichment region in northwest China as an example. The calculations' outcomes attest to the validity of the suggested approach. On this basis, the installed capacity of new energy is used as a variable in a sensitivity analysis to explore the limit of new energy accommodation capacity under the current power supply planning and assess the rationale of the new energy development planning. In the end, a quantitative analysis of the promotion impact of flexibility measures on utilization of new energy is conducted, and new ideas for power system energy planning are suggested.