Zero-sequence voltage injection based low-loss neutral-point balancing control of Active Neutral Point Clamped Inverter for multi-load scenarios

multi-electric aircraft technology is in line with the goal of energy saving and emission reduction, so this technology has received widespread attention in the aviation industry. Under the high-voltage DC power supply system inside the airplane, for three-phase motors and other equipment, Active Neutral Point Clamped inverters (ANPC) have attracted widespread attention because of their good power output characteristics. In the field of aircraft industry, the reliability of the equipment has always been a concern. In order to improve the reliability of the equipment, discontinuous pulse width modulation (DPWM) strategy is used in multi-electric aircraft, this modulation strategy can reduce the switching loss of the switching devices, which makes the life of the equipment increase. Based on this, this paper proposes an improved DPWM algorithm adjusts the zero-sequence voltage to solve neutral-point balancing for multi-load scenarios, which is a simple and flexible method. Both ensure the balance of neutral voltage and solve the problem of excessive loss, through SIMULINK simulation to verify the effectiveness of the method, and experiments to verify the feasibility of the proposed method.