A Calculation Model of Maximum Power Receiving Capacity Considering Multi-DC Power Regulation and Security Constraints

Due to environmental protection requirements and government policies, local power plants in load centers are gradually shut down and the proportion of power receiving increases. Thus, research on the maximum power receiving capacity is of significance. But how to coordinate units and multi-DC power in calculation, while take the security and economy into consideration, poses challenges. An optimization model of maximum power receiving capacity calculation is proposed in this paper, considering multi-DC power regulation and security constraints. DC power flow equations and power generation scale limit around multi-DC landing points are used as constraints for security of receiving-end power system. Unit commitment and multi-DC power regulation are coordinated as decision variables. The model gives decisions for a sequence of periods, and maximizes overall power receiving capacity of multiple operation modes. The model is designed as a problem of Mixed Integer Linear Programming (MILP), to meet accuracy and performance requirements. Finally, IEEE 14 test case is conducted to verify its correctness and effectiveness. The maximum power receiving capacity is obtained under a variety of operation modes. And PSD-BPA power flow results also support this conclusion.