隨著電力電子技術的迅速發展以及現代工業發展的需要，電力電子元件受到廣泛使用，電網中出現了大量的非線性負載。這些負載如二極體整流器、電動機驅動器、電源供應器及照明器具等設備，在節省能源、提高工作效率與改善人們生活品質方面有著舉足輕重的作用。但同時由於這些負載非線性及多樣性之特點，使得大量的諧波和無效電流注入電網中，嚴重影響電網的供電品質與用戶設備的正常運行。為改善電力品質，近年來，主動式濾波器因能夠對隨時變化之負載諧波和無效電流進行快速補償而逐漸受到重視。
本論文旨在模擬實現三相並聯型主動式濾波器(Active Filter)之負載側綜合補償策略，提出以瞬時無效功率法結合對稱分量法之瞬時對稱分量功率法，完成不同負載條件下之電流補償。並且考慮主動式濾波器之有限輸出容量，進而加入選擇性補償策略，決定諧波、不平衡及無效功率三者之補償優先度，以呈現出本論文提出之方法能夠有效抑制諧波並提升電力品質與主動式濾波器之工作效率。文中將使用Matlab/Simulink 模擬系統架構，在不同模擬情境下進行測試，以全域補償及選擇性補償結果驗證本論文方法之可實性。

With the rapid development of power electronics technology and the needs of modern industrial development, power electronic components are widely used, and a large number of non-linear loads appear in the power grid. These loads, such as diode rectifiers, motor drives, power supplies, and lighting fixtures, play an important role in saving energy, improving work efficiency, and improving people's quality of life. However, due to the nonlinearity and diversity of these loads, a large amount of harmonics and ineffective currents are injected into the power grid, which seriously affects the power quality of the power grid and the normal operation of the user equipment. In order to improve power quality, in recent years, active power filters have received increasing attention due to the ability to quickly compensate for load harmonics and ineffective currents that change over time.
This thesis aims to simulate the load side comprehensive compensation strategy of three-phase parallel active filter (Active Filter), and proposes the instantaneous symmetrical component power method combined with the symmetrical component method by instantaneous reactive power method to complete the current compensation under different load conditions. And considering the finite output capacity of the active filter, and then adding a selective compensation strategy to determine the compensation priority of harmonics, unbalance and reactive power, in order to demonstrate that the method proposed in this paper can effectively suppress harmonics and increase power quality and active filter efficiency. In this paper, Matlab/Simulink will be used to test in different simulation scenarios, and the feasibility of this paper method will be verified by global compensation and selective compensation results.

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