The same load equilibrium region containing three different scheduling organs

i.e. the national

regional

provincial electric power dispatching centers of power plant are fairly common in China. Because of the relative independence at all levels of scheduling

it is hard to directly apply economical dispatch technique to the multilevel joint scheduling

resulting in cumbersome coordination. In view of the above problems

this paper presents a multistage plan coordination model for hierarchical processing based on constraint adjustment. The basic idea of the model is independent formulation and combined adjustment. First

all levels of scheduling should calculate the initial output plans with their

respective load balance to relax part of the constraints as the premise. The price for adjusting different constraints is set by making the feasibility analysis of the initial plans within the balanced region

while a constrained processing-oriented multi-level planning model is developed with minimum adjustment as the objective. Application of the model in a provincial power network has validated the model’s capability of multi-level coordination

security constrained

economical dispatch with less data shared

and thus improving the planning efficiency.