交流自調諧濾波器與可控電抗器

摘要：交流調諧濾波器結構簡單，可靠性較高，運行費用較低，廣泛應用在諧波治理電路中。本文論述了交流調諧濾波器的工作原理和固有缺點，濾波器參數變化所引起的失諧是導致濾波性能惡化的主要原因。磁閥式可控電抗器具備近似線性的伏安特性、較小的有功損耗以及較快的響應速度等特點，而且制造工藝簡單、成本低廉、高次諧波小。利用磁閥式可控電抗器電感可以連續調節的特點，可以保持濾波器在諧振點附近工作，大大提高濾波的效果。介紹了新型自動連續調諧濾波器的原理結構及其關鍵部件，它具有自適應能力，可跟蹤諧波變化，使濾波器始終工作在諧振點附近，而且能夠抑制諧波放大，從經濟角度考慮也比較實用，指出用有源技術增強LC調諧濾波器對參數變化的自適應能力是濾波裝置今后的一個發展方向。 敘詞：調諧濾波器；可調電抗器；諧波 Abstract：Tuned AC Filter has their advantages such as simple structure, high operation reliability, low operation cost and so on, and are used widely in harmonic filtering circuit. The principle and the inherent demerits of tuned AC filter are discussedthe detuning due to variation of filter parameters is the main cause of deterioration of filtering performanceMagnetic valve controllable reactor has the near-linear voltage-current characteristic, little loss and high response speed etc. while it is cheap, manufactured easily and has low harmonics, the tunable filter can be kept working on the resonance frequency for the continuous adjusting characteristic of magnetic valve controllable reactor. The newly developed auto-tuned filters are introduced in this paperIt has self-adaptive ability, tracks the change of harmonic, so the filter works around the resonant point, and more it can restrain the magnify of harmonic, it is practical in view of economy. It is the tendency to have the tuned AC filter gain the adaptability to network frequency excursions and filter component variations using active techniques Keyword：tuned filtertunable reactorharmonics