The Difference Of Static Var Generator Used In 3 Phase 3 Wire And 4 Wire System
Reactive power compensation plays a vital role in ensuring the stability and high efficiency of the power system. It involves the use of devices such as static var generator to minimize the effect of reactive power on the system. However, the application of these devices in the three-phase three-wire system and the three-phase four-wire system is different.
In a three-phase three-wire system, reactive power is often generated by loads such as motors and transformers. To compensate for this,static var generator are used to generate reactive power in the form of capacitive or inductive currents to counteract the reactive power produced by these loads.
Three-phase four-wire systems, on the other hand, have an extra neutral wire that creates a separate path for single-phase loads. In this case, reactive power is generated by the load or transmission line, causing voltage drops, poor power factor, and equipment stress. To alleviate these challenges, a combination of passive and active compensation techniques are used.
One technique used in both systems is the SVG static variable generator. Based on switching technology, the device injects or absorbs reactive power from the system depending on the load conditions.
In three-phase three-wire systems, SVG static var generators can be used to inject reactive power when required – eg in the case of heavily loaded motors – and to absorb reactive power when the load decreases. This can ensure a stable power factor and improve system stability.
Likewise, in three-phase four-wire systems, SVG static var generators can provide accurate and responsive compensation for voltage and power factor problems. By controlling the inductance and capacitance of the system, the device improves voltage regulation, reduces harmonic distortion, and mitigates voltage dips and swells.
Based on the requirements of three-phase three-wire and three-phase four-wire system of power grid, Xi’an Noker Electric has developed compensation equipment based on these two systems respectively, which can meet the requirements of the system. The three-phase three-wire system collects the three-phase reactive power, and the three-phase four-wire system needs to increase the reactive power above the neutral line. To sum up, the application of reactive compensation technologies such as three-phase three-wire system, three-phase four-wire system reactive compensator and SVG static reactive generator are different. However, both systems share a common goal: to improve the stability, reliability and efficiency of the grid.
Post time: Apr-03-2023