Power quality monitoring仪What are the characteristics?

1Passive filter:Passive filters in power systems have advantages such as low cost, simple structure, reliable operation, and convenient maintenance，It is currently the main method of harmonic suppression and reactive power compensation used in power supply and consumption systems。However, it has drawbacks such as large volume and significant impact on filtering performance by the system.

2Parallel active power filter:Can basically overcome the drawbacks of passive filters，And introduced a new concept of dynamic compensation。APFExcept for compensating harmonics，It can also adjust various power quality issues。To achieve high capacity harmonics or diversity of active compensation functions，needAPFWith large device capacity。The research on hybrid compensation schemes is currently in a stage of continuous development and gradual deepening。Conduct in-depth research on this type of regulator，For different load situations，Propose corresponding hybrid compensation measures with good technical and economic performance，It will definitely play a positive role in improving power quality.

3Distribution static compensator:at presentIt has started to be applied in the United States and Japan。Its working principle is similar to that of ordinary static reactive power compensation devices(SVC)totally different，Power system power quality monitoring instrumentControl using switchable power electronic devices and instantaneous and reactive power theory based on coordinate transformation principle，It is a device that can balance high order harmonics and reactive power compensation.

4Power quality regulator:A new type of power quality control and governance device for improving the power quality of medium and low voltage distribution networks，Power system power quality monitoring instrumentComposed of two main components: a current transformer and an energy storage device。Converters are generally standard and based on insulated bipolar transistors(IGBT)Pulse width modulation technology，Compared to traditional power quality regulation methods，The adjustment response is faster, more flexible, more practical, and more reliable.