串聯式主動電力濾波器因其主要處理電力系統上電壓之電力品質的問題，故又稱為動態電壓補償器(Dynamic Voltage Restorer , DVR)。其功能為解決電力線上發生單相或多相短路而造成的驟降及其他相伴的品質問題，故主要硬體建構在三相四線式的「直流-交流轉換器」之架構，又因欲快速地做出適當的補償動作，使得在負載端所得到的電壓能維持如同原本未發生問題的電壓情況。因此，如何快速地偵測及補償將是本文著重的課題。 文中主要介紹了串聯式主動電力濾波器的基本概念、架構、補償方法，並在策略的部分做了效能及特性上的比較，且為了克服三相不平衡的情況，幾個能分析正、負相序的演算法也一併列入說明。最後，透過軟體模擬與比較來找出最佳補償方法，並且實現於數位訊號處理器和硬體迴圈，以驗證其效能和可行性。藉由觀察量測到的電壓波形訊號，可以明顯看出許多驟降問題得到改善，使負載端電壓得以維持在一定大小，以保護後端的敏感性負載。 ;Series active power filter which is also named as ‘Dynamic Voltage Restorer (DVR)’ is mainly designed for solving the ‘sag’ or ‘swell’ phenomenon which may also accompany with other voltage quality problems on the distribution line or micro-grid system. To deal with the single or multiple phases voltage magnitude variation as well as some power quality problems, ‘three-phase four-wire’ inverter is adopted. As the sag (swell) event happening, the DVR must detect the voltage vector (both magnitude and phase), compute the appropriate quantity which is needed to be compensated, and then restore the load voltage to pre-sag condition as soon as possible. The functions, configuration, and the comparison of compensating strategies of DVR will be presented here. In addition, some introductions of analyzing Positive-Negative Sequence component algorithm for overcoming the unbalanced sagging are included. At last, the simulations are carried out by software. In order to show the efficiency and be used in practice, the best method is realized on Digital Signal Processor (DSP) and Hardware in the Loop (HIL) experimental platform. By observing the voltage waveform, lots of sagging problem have been improved and maintained the load voltage to a standard level.
