Optimal Partition for Power System Restoration

The reasonable and scientific partitions of power system is very helpful to speed up the black-start restoration by recovering each subsystem in parallel. A new partitioning model and effective solving algorithm for parallel restoration of power grids is proposed. Firstly, a new partitioning model is built according to the practical process of system restoration, which is a large mixed integer nonlinear programming(MINP) problems. Secondly, in order to overcome the difficulty of directly solving a large MINP issue, a step by step solving algorithm is designed: firstly, non-black-start-generators (NBSG) are divided into subsystem based on electrical distance and adjust it to make the total output of each subsystem as balanced as possible; secondly, load buses are divided into subsystems based on the results of power flow tracing calculation and adjust it to make the power mismatch between generation and load requirement in each subsystem as small as possible. The samples demonstrate the effectiveness and correctness of the model and algorithm proposed.