Scheduling model of power system with renewable energy and transaction mode of direct electricity purchase by large consumers considering network security constraints

The policy of transaction mode of direct electricity purchase by large consumers will further reduce the power system scheduling space. When large-scale non-controllable wind turbines and photovoltaic power stations are connected to the system, the optimal scheduling of the system will face even more severe challenges. In order to analyse the impact of the direct purchase of large consumers on the system capacity of renewable energy, this paper proposes a scheduling model of power system with renewable energy and transaction mode of direct electricity purchase by large consumers considering network security constraints. By taking into account the network security constraints, this model can compute large power system and analyse the impact of the direct electricity purchase unit access node on renewable consumption capacity of the system. To illustrate the effectiveness of the proposed model, a real power system in a northern province of China is used in the case study. The consumed renewable energy is calculated and the reason for the wind and solar power curtailment is analysed. The influence of real-time price, contract size, and the unit access node of the direct electricity purchase on renewable energy consumption capacity of the system is analysed.