VAAS is a multifunctional electrical safety active defense device that combines voltage short-term interruption support, voltage temporary drop regulation, voltage temporary rise regulation, load interference suppression, three-phase imbalance suppression, etc. It can seamlessly manage problems such as power shaking and voltage short-term interruption in real time.
The VAAS can cut off voltage sag power source for short time, typically 1~3s, and supply power to load during the voltage sag moment. It can support power supply, adjust the voltage sag, adjust and the voltage raise, eliminate the load reference and provide real time monitoring of fault arc.
VAAS consists of a thyristor bypass section, a converter section, and a supercapacitor energy storage section. The thyristor bypass section is used to quickly turn off the thyristor in case of abnormal system voltage. The inverter section is used to store energy for energy storage devices and output compensation voltage. The filtering part ensures that the generated load side voltage meets the requirements.