CAJ | 학술논문

调制策略是三电平中点钳位(neutral point clamped， NPC)变流器的关键技术之一。三电平查表法空间矢量脉宽调制(space vector pulse width modulation，SVPWM)策略实现复杂，为此，基于三电平正弦波脉宽调制(sinusoidal pulse width modulation，SPWM)策略与SVPWM策略的基本原理，提出了2种三电平SVPWM 策略的快速等效实现方案，即调制波等效方案和导通时间等效方案。调制波等效方案研究三电平 SVPWM 策略的等效调制波，而导通时间等效方案则通过三电平SPWM策略作用下各开关管导通时间计算三电平 SVPWM 策略对应各开关管导通时间，研究结果验证了三电平SVPWM策略2种等效方案的理论一致性。仿真和实验表明所提2种三电平SVPWM策略的快速等效方案具有实现简单、计算时间少，结果更精确的特点。
조제책략시삼전평중점겸위(neutral point clamped， NPC)변류기적관건기술지일。삼전평사표법공간시량맥관조제(space vector pulse width modulation，SVPWM)책략실현복잡，위차，기우삼전평정현파맥관조제(sinusoidal pulse width modulation，SPWM)책략여SVPWM책략적기본원리，제출료2충삼전평SVPWM 책략적쾌속등효실현방안，즉조제파등효방안화도통시간등효방안。조제파등효방안연구삼전평 SVPWM 책략적등효조제파，이도통시간등효방안칙통과삼전평SPWM책략작용하각개관관도통시간계산삼전평 SVPWM 책략대응각개관관도통시간，연구결과험증료삼전평SVPWM책략2충등효방안적이론일치성。방진화실험표명소제2충삼전평SVPWM책략적쾌속등효방안구유실현간단、계산시간소，결과경정학적특점。
Modulation strategy is one of the key issues of three-level neutral point clamped (NPC) converter. In allusion to the complicated implementation of space vector pulse width modulation (SVPWM), based on the three-level sinusoidal pulse width modulation (SPWM) strategy and the basic principle of SVPWM strategy the fast equivalent implementation algorithm of two kinds of three-level SVPWM strategies, namely the modulation-wave equivalent algorithm and the turn-on time equivalent algorithm, are proposed. The modulation-wave equivalent algorithm researches the equivalent modulation-wave under three-level SVPWM strategy, and through the turn-on time of each switch transistor controlled by three-level SPWM the turn-on time equivalent algorithm calculates corresponding conducting time of each switch transistor under three-level SVPWM strategy. Results of both simulation and experiments show that the proposed two kinds of three-level SVPWM strategies possess the advantages of simple implementation, short computing time, and the obtained results are more accurate.