SHORE CONVERTER SKIN

Three level converter – in 3 level converter switches are controlled in such away that AC voltage at the output of converter has 3 voltage levels, +Vdc/2, 0, -Vdc/2. Two level converter – 2 level converter means switches are controlled in such away that AC voltage has only +Vdc/2 and –Vdc/2 voltage levels. Stores the energy and smooth’s the DC voltageĪC filter act as high pass filter which bypasses the high frequency components to ground and reduces the harmonics in the input AC voltage Types of Voltage Source Converter (VSC) – Overview The transformer has the main purpose of transforming the AC voltage in to a level suitable to the converter.Ĭonverter reactor blocks the harmonic current and limit the short circuit current Usually, the converters are connected to the AC system via transformers. Main components of Voltage Source Converter Requires conventional AC transformer 7.Good in reactive power control 8.Used for power transfer from remote areas with renewable energy.Voltage polarity remains constant at the DC link.Capacitive energy storage hence the name voltage source.Provides ease of control as it can be turned off at any instance of AC voltage.Has lower current and voltage carrying capability.Voltage source converter works on IGBT technology for power conversion.Requires AC and DC filter for harmonics and distortion removal.Current polarity remains constant at the DC lines.

Inductive energy storage, hence the name current source converter.Turns off only at the zero current crossing.Has high current and voltage carrying capability in the order of kV and kA.LCC also known as current source converter works on thyristor based technology for power conversion.DC power generated is fed to onshore converter station where DC is converted back to AC.Supply from the transformer is fed to Valves room where AC power is converted to HVDC, in between these two AC reactors are used for protection aginst such as surge current, etc.AC power generated from wind farm is fed to Transformer to boost the voltage level through switchgears for safety and protection purpose.The least breakeven distance is for submarine cables.Break-even distance vary’s for Overhead lines, submarine cables and underground cables.

Decreased transmission cost above the breakeven distance as compared to HVAC transmission.

SHORE CONVERTER SKIN

Helps in transferring more power due to less losses (no reactive power loss, least corona loss, no skin effect, no induction losses).HVDC helps in interconnecting two AC power with different characteristics such as frequency.Once converted to AC it is fed to grid distribution network, from where it reaches to end consumers after going through again different step down processesįollowing is the reason why HVDC is preferred.

Shore converter