Electricity utilization economy of low-carbon park considering system responsibility optimization

The low-carbon park with a high proportion of renewable energy has the capability for self-generation and self-use, significantly reducing the need for purchased electricity. However, due to limited self-balancing ability, the park still relies on the power system to ensure reliable power supply. Against this backdrop, traditional charging for transmission and distribution solely based on electricity consumption is no longer suitable, and may mislead the park’s reasonable investment. Thus, a flattier capacity transmission and distribution tariff metering method based on the park's grid connection capacity is provided. The method would contribute to establishing a sound electricity pricing mechanism, and ensuring that the park fairly shares system responsibilities. Firstly, the flat-tier capacity electricity price is calculated by converting the two-part tariff corresponding to the voltage level of the park's grid connection point. Secondly, under the electricity spot market price, an optimal dispatch model for the low-carbon park, which considers system responsibility optimization, is built. Finally, actual data of two provinces is applied to analyzing the impact of different regions and park types on the electricity utilization economy in the park. The results provide a reference for future investment planning for consuming local clean energy project of the park.