Control method, device and system of frequency converter system and readable storage medium

The invention discloses a control method, device and system of a frequency converter system and a readable storage medium, and the method comprises the steps: transmitting a first pulse signal to a second main control system, and receiving a second pulse signal transmitted by the second main control system; when the state of the first main control system is a working state, detecting whether the first main control system has a fault or not; when it is detected that the first master control system breaks down, the level of the first pulse signal is kept, and the state of the first master control system is switched into a fault state. The problem that when one frequency converter system in the dual-redundancy frequency converter system breaks down, switching to the other frequency converter system is low in switching efficiency is solved, the switching efficiency of the frequency converter system is improved, and load equipment controlled by the frequency converter system can operate continuously and stably. 本申