Container type DC deicing system and control method

The invention provides a container type DC deicing system and a control method. The topology of a main circuit of the DC deicing system is of a three-phase chain structure. Each phase is formed by an upper bridge arm, a lower bridge arm and corresponding bridge arm electric reactors. Each bridge arm is formed by connecting N full-bridge power modules in series. A common connection point where the head ends of the upper bridge arms of the three phases are connected is used as the positive pole of a DC bus. A common connection point where the tail ends of the lower bridge arms of the three phases are connected is used as the negative pole of the DC bus. The DC deicing system is installed in a container and is divided into two power boxes and a switching box according to functions, so the container type DC deicing system is clear in structural division, convenient to transport and simple in switching operation. The container type DC deicing system has the functions of reactive compensation and DC deicing, is convenient to transport due to the fact that the DC deicing system is installed in the container, and is clear in functional and structural division and fewer in required switching switches, and the purpose that DC output voltages starting from the zero voltage can be continuously adjusted through the adoption of a common connection point potential deviation control method can be achieved.