DEVICE AND METHOD FOR SELF-HEALING CONTROL OF MULTI-LEVEL POWER GRID

摘要

A device and method for self-healing control of multi-level power grid are provided in the present invention. The requirements to be satisfied by the present invention are that: interaction and balance between power supply and load are implemented; coordination and cooperation between various distributed power supplies, micro-grid in each level, and main grid are controlled; interconnection or islanding state of the localized grid is identified automatically; and energy supply is guaranteed maximumly. The device for self-healing control of multi-level power grid is connected in one or more levels of the multi-level power grid, and the device includes: a parameter collecting and monitoring unit, a central processing unit, a human-machine interface and configuration parameter setting and inputting unit, and a coordination control unit. The device uses frequency as the information carrier to represent the power grid connection state and the area coverage hierarchy, enables the load and power supply in the power grid to identify the state of their localized grid by themselves, and performs automatic switching according to the preset strategy; the device uses frequency as the information link, implements power supply and demand matching by self-adjustment between the power supply and the load in the system, and guarantees the automatic balance and stabilization of the power grid both in the status of interconnection and the status of islanding.