Dual control system and method of medium-speed diesel engine

Herein is directed to a redundant control system and method for medium-speed diesel engines, redundancy in accordance with one embodiment of the present disclosure control system, the main controller, a row of the engine by controlling the speed governor (Governor) when a failure occurs in the main controller of operation it is included in the unit controller, and a communication connecting means for data exchange between the main control group and the sub-controller to be, and the main control groups perform at least one task (task) for detecting the abnormality by itself, the first includes a self-diagnostic module, and the sub controller for executing a self-diagnosis (Built-in Test) in order to diagnose the abnormality of the task (task) is at least one task to detect the abnormality by itself ( perform the task), and a second self-running self-diagnosis (Built-in Test) in order to diagnose the abnormality of the task (task) It may include a single module. In accordance with one embodiment of the present specification, by the controller, and automatically switch no more than a switch of the speed governor (Governor) according to a periodic diagnosis result when abnormality occurs after starting the diesel engine, the controller is malfunctioning partner controllers of the controller controls the speed governor it is possible in continuous operation without stopping the engine. Accordingly, an effect of enabling a stable operation of the engine.