Generation of High A.C. Voltages Cascaded Transformer - High Voltage Engineering

TL;DR

Cascaded transformers can be used to generate high AC voltage by cascading multiple transformers, reducing weight, cost, and simplifying transportation and erection.

Transcript

yo friends let us talk on generation of high voltage we know that we have a potential transformer this potential transformer can be used to step up the voltage this category is available for single phase as well as for three phase so with the help of this step up transformer the voltage can be increased to the required level in single phase and thr... Read More

Key Insights

• ⚡ Cascaded transformers are used to generate high AC voltage by connecting multiple transformers together in series.
• 🏋️ The weight, cost, and transportation complexity of a transformer unit can be reduced by cascading transformers.
• 😘 The power loading on the lower stages of cascaded transformers is higher, while the current passing through the secondary winding remains the same.
• ⚡ The voltage increases with each stage of the cascaded transformers, resulting in a higher overall output voltage.
• 💭 Cascaded transformers require three windings in n-1 stages, with the nth stage having only two windings.
• ✊ The primary winding of the third stage transformer carries a power loading of "p," while the tertiary winding of the second stage carries twice "p" and the primary winding of the second stage carries twice "p."
• 🍰 The total short circuit impedance of a cascaded transformer can be obtained from the data of individual stages.
• 🥳 The potential transformer used for step-up purposes differs from the cascaded transformer in the number of windings and voltage ratio.

Questions & Answers

Q: What is the purpose of using cascaded transformers to generate high voltage?

Cascaded transformers are used to generate high AC voltage by connecting multiple transformers together in series. This reduces the weight and cost of the overall unit, making transportation and erection easier.

Q: How does the power loading differ in cascaded transformers?

The power loading in cascaded transformers is higher on the lower stages. Each stage of the cascaded transformers carries a current equal to the power divided by the voltage. The primary winding of the third stage transformer is loaded with "p," the tertiary winding of the second stage transformer is loaded with twice "p," and the primary winding of the second stage transformer is loaded with twice "p."

Q: What are the advantages of using cascaded transformers?

The advantages of using cascaded transformers include reduced weight, cost, and simplified transportation and erection. By cascading multiple transformers, the weight of the unit is divided into single units, making it easier to transport and erect.

Q: How does the voltage increase in cascaded transformers?

In cascaded transformers, the voltage increases with each stage. Each stage is connected in series, and the total voltage becomes the sum of the individual voltages of each stage. For example, if each stage voltage is "v," the total voltage will be three times "v" in a three-stage cascaded transformer.

Summary & Key Takeaways

• High voltage can be generated using cascaded transformers, which involves connecting multiple transformers together.

• Cascading transformers reduces the weight and cost of the unit, making transportation and erection easier.

• The power loading on the lower stages of cascaded transformers is higher, but the current passing through the secondary winding of each stage remains the same.