With the growing connectedness of modern power grid, the blackout accident has a significant negative impact on people’s living and national economic development. Therefore, researching on the blackstart problem is of great theoretical value and practical significance.Customer’s total outage cost is used to evaluate the impact of the blackout accident. According to the mutual effects between units starting up and loads restoration during blackstart process, an optimal power system blackstart model considering both parts is presented in this paper, which is to minimize the total outage cost while subjected to generator technical requires, system frequency stability, system reserve capacity and system real power balance constraints. On this basis, added considering network security and load flow constraints, a more comprehensive power system blackstart model integrating units starting up, network reconfiguration and loads restoration is built.To solve such a complex, multi-stage, non-linear and mixed-integer problem directly, nonlinear constraints including unit outage cost, unit starting up, unit largest output power, load power, direct power, line recovery and bus recovery are linearized by integer algebra techniques, transforming the derived formulation into the mixed-integer linear programming model. This complicated problem is modeled by the GAMS and solved by the CPLEX.4units and3loads system, IEEE30-bus system and IEEE118-bus system studies demonstrate the effectiveness of the presented approach. |