At this year's Hanover Fair Siemens Energy presented smart, eco-friendly solutions for power generation, transmission and distribution. The highlights included a new 2.3-MW gearless wind turbine for low wind speeds, solutions for the connection of offshore wind farms to the grid using high-voltage direct-current transmission technology (HVDC) as well as a charging point, which can charge electric vehicles with a normal battery capacity within an hour. They also featured new gas-insulated switchgear and a prototype of a 72.5-kV circuit-breaker with a vacuum interrupter as the switching element.
For low to moderate wind speeds Siemens Energy has developed a new gearless wind turbine, which the company presented in Hanover. The core feature of the SWT-2.3-113 wind turbine is an innovative drive concept with a compact permanent magnet generator. This type of generator is characterized by its simple, robust design, requiring no power for excitation and control systems and don't need sliprings. This results in high efficiency even at low loads. With a capacity of 2.3 megawatts (MW) and a rotor diameter of 113 meters the new wind turbine is designed to maximize power production at sites with low to moderate wind speeds. It is fitted with the new Siemens B55 Quantum rotor blades. This new blade design boosts efficiency and optimizes performance. A prototype of the new Siemens wind turbine was installed in the Netherlands in early March.
.The Charge CP700A charging point can charge electric vehicles with a normal battery capacity within an hour. The charging power has been doubled to 22 kilowatts (kW) in the new series, which in turn cuts charging time in half. In the fastest operating mode the vehicle is supplied with three-phase AC voltage at a current of 32 amperes (A) and is therefore charged at a power level of 22 kW. Charging is, however also possible both in single- and three-phase mode. The charging point communicates with the vehicle over the charging cable to determine whether the electric car supports charging at maximum current (32 A) or only at a reduced current level (20 A). A standardized IEC 62196-2 Type 2 connector is used for this. The charging point can also be linked to a control center over Ethernet or an integrable GSM/GPRS modem, meaning that it is ready for remote monitoring and maintenance. The charging behavior of the charging point can be remote-controlled to support implementation in a smart grid
Source: Siemens
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