Abstract：Space vector pulse width modulation（SVPWM）strategy is one of the key technologies for threelevel

inverters. However，conventional three-level SVPWM often experiences neutral point potential（NPP）

oscillation and high switching loss when addressing the neutral point potential balancing issue. To tackle this

challenge，firstly，the fundamental principles of the traditional nearest three vector（NTV）synthesis strategy and

the virtual space vector pulse width modulation（VSVPWM）strategy were reviewed. And then，the drawbacks of

the NTV approach based on the conventional region partitioning method was analyzed. A dynamic partitioning

method was proposed to resolve the neutral point potential offset caused by conventional partitioning.Furthermore，to counteract the NPP oscillation of the NTV under high modulation，a strategy that employs a synthesis of foureffective voltage vectors was introduced. Compared to VSVPWM，the proposed strategy significantly reduced the inverter's switching loss. Ultimately，the effectiveness and superiority of the proposed algorithm were validated through experimental results.

      Key words：three-level inverter；neutral point potential（NPP） balance；switching loss；seven-segment；

dynamic partition