What are the different types of HVDC converters?
As for the technology of the HVDC transmission system, two main types of converters are: 1. line-commutated HVDC (LCC-HVDC), and 2. voltage-source HVDC (VSC-HVDC).
Why transformers are not used in DC supply?
As mentioned before, transformers do not allow DC input to flow through. This is because a change in current cannot be generated by DC; meaning that there is no changing magnetic field to induce a voltage across the secondary component.
What type of transformer is used in substation?
Substation transformers are most often offered with one of 3 different fluids: Mineral oil or silicone transformer oil. Primary voltages of a substation transformer usually ranges from 2.4 kV to 69 kV in 225 through 20,000 kVA sizes, but 600 volt through 35 kV secondary voltage ratings are also available.
Which transformer is used in industry?
These transformer types, as well as transformers with direct connection to a rectifier are called special-purpose or industrial transformers, whose design is tailor-made for high-current solutions for industry applications. Contents: Electric arc furnace transformers (EAF) DC electric arc furnace transformers (DC EAF)
What is current source converter?
In a current source converter (CSC), the DC current is kept constant with a small ripple using a large inductor. The direction of power flow through a CSC is determined by the polarity of the DC voltage, whereas the direction of current flow remains the same.
Why voltage sourced converters are preferred than current sourced converters for facts application?
In offshore HVDC grids, MMC is becoming the preferred power electronic converter for converting between AC and DC as it presents several benefits: (i) the ability to reverse the power flow without reversing the polarity of the DC voltages by DC current reversal; (ii) modularity and scalability features, making it …
Is DC transformer possible?
Transformer only works on AC and can’t be operated on DC i.e. it has been designed to be operated only and only on alternating current and voltage.