Most of the industry preferred H- bridge multilevel inverter for DSTATCOM for high power applications or any other reason.
Dstatcom are used to compensate the power quality of reactive power component of load current, fluctuating currents, unbalanced current.
The injected harmonics to the network by an inverter, and the converter operating safety are two important characteristics of a converter working in the power system. The H-Bridge converters used in Dstatcom not only decreases the lower order harmonics of the converter, but also have a suitable safety during the operation. For instance, these converters are hot swap and they can be repaired during operation in the network.
It is caused by relatively simple driver construction in comparison to a driver for 3-level NPC type inverter.
1- matured technology.
2- Easy to control.
However, it has the issue of electrolytic capacitors, and some literature claim that 30% of power electronics failures are caused by these e-caps.
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