Control method, device, system and storage medium

A control system comprising:

• a three-phase three-level power supply circuit including busses;
• a first load connected to one of the buses;
• a second load connected to two of the buses;
• a first control device;
• and
• a second control device;
• wherein:
• the three-phase three-level power supply circuit is configured to rectify an input alternating current signal to obtain a direct current signal and provide a working power supply for the first load, the second load, the first control device, and the second control device;
• the first control device is configured to:
• in response to detecting a target-type fault, determine a control signal for instructing the first load to stop operating, the target-type fault being correlated with the second load;
• and
• send the control signal to the second control device via a target communication channel, to instruct the second control device to control the first load to stop operating;
• and
• the second control device is further configured to manage and control the second load.