2022 IEEE 5th International Electrical and Energy Conference (CIEEC 2022)

As the increasing degree of penetration of new  energy in the power system, the traditional methods of scheduling and planning are challenged as the wind and solar generations will be the majority power supply in the future China. And the

DC transmission has gradually become the major inter-provincial power transmission, providing the suitable way of consuming clean power through out multiple regions. Thus, a comprehensive model that could take demand side, supply side, and the DC transmission into consideration, and advice confifiguration or planning is proposed in this paper. The supply side resources, like different types of thermal power plants and new energy plants has been studied and modeled in aggregated way. Followed by the modeling of aggregated power grid, demand side, and battery storage, major aspects of power system are presented in mathematical expressions. Object of the model is to maximize the output of wind and solar power output, while satisfying the system constrains. In case study, different confifigurations consisting wind, solar, thermal, and storage units are studied in order to support the DC near-fifield power balance and to reduce dependence to the main grid. The results show that, the proposed time series simulation model could simulate realistic situations  considering the characteristics of new energy and grid operation, and advice future grid planning by giving plausible confifiguration schemes with desired constrains.