POWER-GRID SELF-HEALING SYSTEM AND SELF-HEALING LOGIC THEREOF IN 110KV CHAIN POWER-SUPPLY MODE

摘要

A power-grid self-healing system and a self-healing logic thereof in a 110kV chain power-supply mode. The 110kV chain power-supply mode comprises: two 220kV power source stations, and a plurality of 110kV serial power-supply stations connected in series between the two 220kV power source stations; for one of the plurality of 110kV serial power-supply stations, the switch of a one-side supply line thereof is in an open position, and is an open-loop point. The self-healing system comprises a master station device and a plurality of substation devices connected in series; each of the 220kV power source stations and each of the 110kV serial power-supply stations are respectively provided with a substation device; the master station device is connected to one of the substation devices; the substation device is provided with an analog acquisition interface, a binary-input acquisition interface and a binary-output output interface, and is used to connect a power station to collect analog signals and switch signals of the power station, and to execute a protection control command issued by the master station device. In the event of a grid failure, the system can quickly isolate the failure, and enable a standby power supply, so as to achieve a self-healing function in chain power-supply mode, thus improving the quality of power supply.