CAJ | 학술논문

针对低风速段开关磁阻风力发电机的运动电动势低于发电电动势、导致发电区间小于励磁区间的问题，将Z源网络耦合到励磁电源与不对称半桥功率变换器之间，强化励磁电压，加快励磁电流上升速度，减小励磁区间，提高低速发电效率；同时给励磁电容充电，实现快速自励；并通过Z源网络实现滤波，节省成本，减小体积。 Matlab仿真实验表明：与传统不对称半桥功率变换器相比，基于Z源网络新型功率变换器能明显提高SRG在低速段风能利用率和发电效率。20 kW小功率样机测试结果也验证了新型Z源网络功率变换器能优化开SRG低速性能。
침대저풍속단개관자조풍력발전궤적운동전동세저우발전전동세、도치발전구간소우려자구간적문제，장Z원망락우합도려자전원여불대칭반교공솔변환기지간，강화려자전압，가쾌려자전류상승속도，감소려자구간，제고저속발전효솔；동시급려자전용충전，실현쾌속자려；병통과Z원망락실현려파，절성성본，감소체적。 Matlab방진실험표명：여전통불대칭반교공솔변환기상비，기우Z원망락신형공솔변환기능명현제고SRG재저속단풍능이용솔화발전효솔。20 kW소공솔양궤측시결과야험증료신형Z원망락공솔변환기능우화개SRG저속성능。
In low wind speed, the motional electromotive force of switched reluctance generation( SRG) is lower than the generation electromotive force, resulting in generate electricity interval less than the excita-tion interval. Aiming at these problems, Z-source network was coupled between the excitation power source and asymmetrical half-bridge power converter. It has many advantages, such as strengthen the ex-citation voltage, accelerating the rising speed of excitation current, shrinking excitation interval, increas-ing the efficiency of low speed power generation, and charging the excitation capacitor to achieve rapid self excitation. The cost can be saved, and volume can be reduced with self-filter by Z-source network. MATLAB simulation result shows that the new power converter based on Z-source network can improve the low speed wind energy utilization and SRG power generation efficiency, compared with the traditional asymmetrical half-bridge power converter. Small power prototype test result also verified that the new Z-source network power converter can optimize SRG low performance.