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Powering sensors through optical fibers

IP.com Disclosure Number: IPCOM000198730D
Original Publication Date: 2010-Aug-23
Included in the Prior Art Database: 2010-Aug-23
Document File: 2 page(s) / 102K

Publishing Venue

Siemens

Related People

Juergen Carstens: CONTACT

Abstract

The power supply for electronic devices in wind turbine blades is usually realized by external power supplies. If electronic devices such as sensors are implemented in the blade of a wind turbine, external power supplies are used and the power is transmitted from the hub to the devices by cables. However, the use of cables along the blades can be very critical if the blade is exposed for a lightning strike. In case that the blade is hit, the emerging energy goes through the power cables and enters the electronic system of the turbine and can cause extreme damage to the electric system. A lightning strike occurs very often during the lifetime of a turbine, especially if the turbine is installed offshore. To protect the turbine, the blade is provided so far with a number of earth connected lightning receptors. In the tip of the blade a receptor is installed. If a lightning strikes the blade, the current from the lightning follows the special designed protection cable that leads along the blade to the ground beneath the turbine. If the current goes through the designed receptor and cabling, the high amount of current does not damage the installations inside the turbine. The receptors are installed from the outside and can be changed after a lightning strike. The rotor blades are the most exposed parts of the turbine and are the highest point of the structure. The rotor blades consist of essentially non-conducting materials and can be dangerous to the surroundings if damaged. If the power cabling leads to the sensors along the lightning protection wire, the cables can be damaged or simply melted by the power of the lightning.

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Powering sensors through optical fibers

Idea: Jimmi Andersen, DK-Brande; Dr. Andreas Ziroff, DE-M√ľnchen

The power supply for electronic devices in wind turbine blades is usually realized b supplies. If electronic devices such as sensors are implemented in the blade of a wi external power supplies are used and the power is transmitted from the hub to the d However, the use of cables along the blades can be very critical if the blade is expo strike. In case that the blade is hit, the emerging energy goes through the power ca electronic system of the turbine and can cause extreme damage to the electri
strike occurs very often during the lifetime of a turbine, especially if the turbine is installe protect the turbine, the blade is provided so far with a number of earth connect
In the tip of the blade a receptor is installed. If a lightning strikes the blade, the cu lightning follows the special designed protection cable that leads along the blad beneath the turbine. If the current goes through the designed receptor and cabling current does not damage the installations inside the turbine. The receptors are installe

    y external power
nd turbine,
evices by cables. sed for a lightning bles and enters the c system. A lightning
d offshore. To ed lightning receptors. rrent from the
e to the ground

, the high amount of d from the

st exposed parts of essentially non-
e power cabling
d or simply melted

Electric energy is nverted to electric tip deflection,

of sensors that need electrical power and are located in

                                                     used for powering de along the blade rim web. The solar panel is placed next to the sensor to avoid unnecessary cabling (see Figure 2). The solar panel is serviceable on the outside by a lead-in on the...