| 摘要 |
PROBLEM TO BE SOLVED: To provide a method for driving a pitch system in a wind energy facility, even in a case of moderate network overvoltages, permitting the continued operation of the pitch system.SOLUTION: A pitch system includes at least one network voltage measuring device 5, and each of input rectifiers 1 includes at least one semiconductor switching element 6. The semiconductor switching element can block a flow of current from a supply network 3 into each of the input rectifiers 1. If each network voltage measuring device 5 measures the voltage of the supply network 3, and the measured voltage of the supply network 3 or a value calculated from a plurality of measured voltages exceeds a first voltage value, each of the semiconductor switching elements 6 blocks the flow of current from the supply network 3 into each of the input rectifiers 1, and each pitch drive 2 is supplied with electric power by an emergency power storage device 4 connected to the pitch drive 2. |
