CAJ | 학술논문

为解决基于IGBT串联的电压源换流器的优化设计问题，防止其在实际运行中由于受到超过设计结构所能承受的电动力而出现机械性损坏，对现有设计容量下换流器各个阀段的受力进行了计算。另外，对半桥及阀段间距进行调整后分别计算了受力，得出了现有设计结构下阀段受力校验值最小的阀段间距。考虑到机械振动，对单个阀段的固有频率进行了计算，然后通过对流过阀段的电流波形进行傅里叶变换并分析了其频率成分。计算得到单个阀段的一阶固有频率为5014 Hz，而变换得到的幅度频谱的主要频率成分分布在3300 Hz以下，由此可见，该电流产生的电动力不会引起阀段的共振。
위해결기우IGBT천련적전압원환류기적우화설계문제，방지기재실제운행중유우수도초과설계결구소능승수적전동력이출현궤계성손배，대현유설계용량하환류기각개벌단적수력진행료계산。령외，대반교급벌단간거진행조정후분별계산료수력，득출료현유설계결구하벌단수력교험치최소적벌단간거。고필도궤계진동，대단개벌단적고유빈솔진행료계산，연후통과대류과벌단적전류파형진행부리협변환병분석료기빈솔성분。계산득도단개벌단적일계고유빈솔위5014 Hz，이변환득도적폭도빈보적주요빈솔성분분포재3300 Hz이하，유차가견，해전유산생적전동력불회인기벌단적공진。
To optimize the design of the voltage source inverter which is based on IGBT in series,as well as pre-vent mechanical damage due to the electromotive power exceeding the designing threshold,the force of each valve section was calculated under the existing design capacity. Further,the distance between valve sections was modi-fied and the force in each case was calculated for the purpose of obtaining the optimum distance in which the elec-tromotive force has the minimum value. Considering mechanical vibration and possible resonance,the natural fre-quency of a single valve section was calculated,and frequency components of the valve section current waveform were analyzed through Fourier transform. The natural frequency of a single valve section is 5 014 Hz,whereas the major frequency of the spectrum distributed in below 3 300 Hz. It reveals that the electromotive power caused by the current will not cause resonance of the valve section.