Aktiver harmonischer Filter (Ahf) und passiver harmonischer Filter (PHF) sind zwei verschiedene Arten von Geräten, die zur Filterung in Stromversorgungssystemen verwendet werden. They have significant differences in structure, working principle and performance. Here are the main differences between them:
1. Structure and Composition:
Aktiver harmonischer Filter: AHF uses active control technology, usually composed of power electronic devices and control circuits, which can actively generate opposite harmonics or clutter signals and inject them into the power grid to achieve a filtering effect.
Passiver harmonischer Filter: PHFr is a passsive filter, which is mainly composed of passive components such as inductors, capacitors and resistors, and relies on inherent frequency characteristics to achieve filtering functions.
2. Filtering Principle:
Aktiver harmonischer Filter: AHF interferes with harmonics or clutter signals in the power grid through active control technology, and has good filtering effect and dynamic response capability.
Passiver harmonischer Filter: PHF uses the frequency characteristics of passive components such as inductors, capacitors and resistors to filter out signals at specific frequencies, and the filtering effect is relatively weak.
3. Performance Comparison:
Aktiver harmonischer Filter: AHF has good filtering effect and dynamic response capability, and can quickly and effectively suppress harmonics and clutter in the power grid.
Passiver harmonischer Filter: PHF is simple in design and low in cost, but its filtering effect and dynamic response capability are relatively weak, so it is suitable for some occasions that do not require high filtering performance.
To sum up, there are obvious differences between active harmonic filter and passive harmonic filter in terms of filtering principle, structure and performance. When selecting a filter, the respective advantages and disadvantages should be weighed based on system requirements and economic considerations, and the most suitable filter type should be selected to ensure the normal operation and stability of the power system.
