Active dispatch for interconnected power system considering coordination of tie line power schedule and peak climbing demand

Close is the correlation between frequency regulation, peak load and tie-line regulation in the interconnected power system. In the process of peak climbing, how to prevent the impact of the interconnected power system support on the tie-line and solve the problem of AGC units lacking capacity is the key problem in the peak active dispatch. This paper builds a model for coordinating optimal dispatching of peak climbing for the interconnected power system. The units relating to tie-line can be procured by an electrical dissection algorithm in the sending and receiving network at the first peak climbing stage. Then the regulating capacities of NON-AGC units in the sending and receiving network are checked and NON-AGC units are divided into two unit groups, the regulating capacity short and regulating capacity abundant group. In the process of peak climbing, firstly, the units relating to tie-line is dispatched so as to maintain the scheduled power of tie-line. Then various units in the sending and receiving network are coordinated at the same time, including the NON-AGC units and AGC units, as well as the regulating capacity short and regulating capacity abundant unit groups. The case analysis demonstrates the feasibility of the model proposed.