Harmonic currents, which are high-frequency currents base on multiples of the base value of 50 Hz. These extra currents can overload the capacitor and cause it to overheat. The higher the level of harmonic current, the greater the load.
Static Var generators are base on inverters, so they are completely insensitive to harmonic currents. In fact, Sine-x technology can be use to reduce “power factors” and harmonic currents through a single device.
Resonance is the best no-no in any system. If the power of the inductor ра is equal to a certain frequency, system resonance may occur. This often leads to excessive voltages flowing through the system. In the case of linear loads. The possibility of resonance is easy to imagine. Since the study is only necessary at a frequency of 50 Hz. When applying nonlinear loads such as matching currents. The system can resonate at different frequencies. The consequences of which can be catastrophic due to high voltages throughout the network.
Static Var generators do not use Power Factor Correction Capacitors to generate k-VAR emitters, so no resonance can occur.
Blocking inductors
Power capacitors base on many common capacitors are equip with interconnect inductors. These inductors are specially design to stop one or two harmonic currents (usually fifth through seventh). However, the harmonic currents that create nonlinear loads occur at infinite frequency. So when the fifth and seventh are block, the capacitors can absorb other harmonics. Another often overlook area. In the design of power factor systems is that the output voltage of the lock chamber is up to 10% higher than the input. Therefore, an appropriate voltage capacitor should be select for reliable operation.
Static-Var generators are not sensitive to harmonic currents, so they do not need a stop block.
Overheating
The effects of overheating capacitors, especially modern self-heating capacitors, can be very dangerous. Overheating can be cause by both overloading and poor ventilation . Which can lead to rapid damage or damage to the condenser. Failure can even “escape” almost immediately.
StaticVar generators are inverter-base and feature factory-built ventilation systems. At extreme temperatures, it simply slips.
Overvoltage Motor start capacitors are very susceptible to damage from overvoltage. The surge is often thought of as a simple transfer of power. But in fact connecting and disconnecting the through power factor correction contactor. When changing power factor requirements will cause large voltage shifts across the capacitor terminal. In especially when the capacitor is half charge.
Static-Var generators are infinitely variable in name. So “steps” are not turn on or off, eliminating the risk of transient overvoltage.
