WIND TURBINE GENERATOR SYSTEM AND LIGHTNING PROTECTION DEVICE THEREOF

摘要

A lightning protection device for a wind turbine generator system includes at least a blade arrester, a down lead of a blade connected to the blade arrester, a lightning-proof element of a pitch bearing, a lightning-proof element of a rotor bearing. The lightning-proof element of the pitch bearing is arranged at the blade root, with one end connected to the down lead of blade and the other end connected to the lightning-proof element of the rotor bearing. The lightning protection device forms a lightning current conducting path passing through a cavity of the pitch bearing, a hollow of a rotor shaft and a cavity of the rotor bearing. A wind turbine generator system having the above mentioned lightning protection device is provided.

主权项

1. A lightning protection device for a wind turbine generator system including a rotor connected with a hub and at least one rotor blade, wherein the rotor blade is connected to the hub via a blade pitch bearing, the hub is connected to a hollow rotor shaft and the hollow rotor shaft is supported by at least one rotor bearing, and wherein the pitch bearing has a cavity therein and the rotor bearing has a cavity defined by the inner diameter of each bearing,the lightning protection device includes:
a blade arrester located near the blade tip and at the side of the blade, a down lead of blade connected to the blade arrester, a lightning-proof element of the pitch bearing and a lightning-proof element of the rotor bearing, wherein the lightning-proof element of the pitch bearing is provided at the blade root, one end of the lightning-proof element of the pitch bearing is connected to the down lead of blade and the other end is connected to the lightning-proof element of the rotor bearing; wherein the lightning-proof device forms a lightning current conducting path which is passing through the cavity of the pitch bearing, the hollow portion of the hollow rotor shaft and the cavity of the rotor bearing.