现代电子技术
現代電子技術
현대전자기술
Modern Electronics Technique
2015年
18期
16-18
,共3页
张建%陆庆%郑崇伟%戴瑜兴
張建%陸慶%鄭崇偉%戴瑜興
장건%륙경%정숭위%대유흥
逆变器%LCL滤波器%谐波频谱%参数优化
逆變器%LCL濾波器%諧波頻譜%參數優化
역변기%LCL려파기%해파빈보%삼수우화
inverter%LCL filter%harmonic spectrum%parameter optimization
为了减少逆变器中的谐波干扰,常采用LCL滤波器,该滤波器性能优良,被广泛采用,但目前LCL滤波器的电感电容仍然较大,系统成本仍较高,据此提出一种新型的设计方法,即通过逆变器输出的高次谐波峰值及其频谱,采用直线交截法依次获得谐振频率等相关滤波参数.与此同时,在此基础上对基于谐波频谱的LCL滤波器的各参数再次进行优化,然后通过与未经优化的LCL滤波器进行性能分析比较,从理论上揭示了该滤波器的优越性.最后通过在三相并网逆变器上进行实验验证,最终设计出了总电感电容较小,且满足并网要求的LCL滤波器.
為瞭減少逆變器中的諧波榦擾,常採用LCL濾波器,該濾波器性能優良,被廣汎採用,但目前LCL濾波器的電感電容仍然較大,繫統成本仍較高,據此提齣一種新型的設計方法,即通過逆變器輸齣的高次諧波峰值及其頻譜,採用直線交截法依次穫得諧振頻率等相關濾波參數.與此同時,在此基礎上對基于諧波頻譜的LCL濾波器的各參數再次進行優化,然後通過與未經優化的LCL濾波器進行性能分析比較,從理論上揭示瞭該濾波器的優越性.最後通過在三相併網逆變器上進行實驗驗證,最終設計齣瞭總電感電容較小,且滿足併網要求的LCL濾波器.
위료감소역변기중적해파간우,상채용LCL려파기,해려파기성능우량,피엄범채용,단목전LCL려파기적전감전용잉연교대,계통성본잉교고,거차제출일충신형적설계방법,즉통과역변기수출적고차해파봉치급기빈보,채용직선교절법의차획득해진빈솔등상관려파삼수.여차동시,재차기출상대기우해파빈보적LCL려파기적각삼수재차진행우화,연후통과여미경우화적LCL려파기진행성능분석비교,종이론상게시료해려파기적우월성.최후통과재삼상병망역변기상진행실험험증,최종설계출료총전감전용교소,차만족병망요구적LCL려파기.
In order to reduce the harmonic interference in inverter,LCL filter was adopted and popularized due to its per-fect performance,but at present,the inductance capacitance of the traditional LCL filter is still relatively large,so the system cost is high. In view of this,a new-type design procedure is proposed in this paper,with which high-order harmonic peak output by inverter and its spectrum are obtained,and resonant frequency and other related filtering parameters are got with the linear intercept method in proper order. On this basis,the various parameters of LCL filter are optimized again,and then the opti-mized filter is compared with unoptimized LCL filter to do further analysis. The superiority of the new-type filter was revealed. Af-ter experimental verification on three-phase grid-connected inverter,a new-type LCL filter that satisfied the requirements of LCL filter with small inductance capacitance was designed.