The control strategies and assessment methods for transmission interface power flow based on hierarchical and divisional dispatch mode

Due to the rapid development of China power source construction, the generation and load in regional power grids are gradually imbalanced, which highlights the contradiction between power source and network distribution and causes the security constraints problems. The paper first presents a divisional control modeling method which significantly reduces the complexity of the flow control. Then, an automatic hierarchical interface control strategy is proposed based on the divisional dispatch mode, which achieves the multi-target and hydro-thermal coordination. In addition, the paper also designs a series of indexes which used to evaluate the control performance for transmission interface control. These indexes provide a basis for decision making on real-time power control. The proposed control strategies and assessment methods have been put into operation in actual power grids. The results are proved to be feasible and effective.