What is a disadvantage of conventional transformers?

Despite the widespread use of this equipment in the power system, it has the following disadvantages: Any unwanted changes in the input directly affect the output voltage. Conventional transformers provide a cheap and efficient method to convert voltage and insulation levels. Some advantages of these transformers are:

What are the advantages of a solid-state transformer?

One of the advantages of the proposed solid-state transformer model in Reference 106 is better power factor correction and voltage regulation. It also eliminates voltage sag and voltage swell using the existing STATCOM in the distribution network.

Why do we need a transformer in a power system?

In general, in the power system, transformers are used to step up/step down the voltage. However, traditional transformers do not have the ability to compensate for voltage sag and swell, reactive power, fault isolation, and so on. Solid-state transformers (SST) can overcome these drawbacks.

What problems can a solid-state transformer solve?

A solid-state transformer (SST) can solve these problems in the distribution network not only by facilitating controlled bi-directional distribution of active and reactive powers, but also can provide a robust DC bus to isolate the disturbance on both sides of the transformer.

What are the advantages of SSTs compared to low-frequency transformers?

SSTs can use different switching topologies and provide significant advantages compared to low-frequency transformers. According to Reference 100, SSTs are technically and economically cost-effective. Figure 16 shows a distribution system based on SSTs.

Does a three-phase solid-state transformer improve power quality?

In References 103, 110, a mathematical model of a three-phase solid-state transformer is presented that investigates the effect on power quality improvement.