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    • 2. 发明公开
    • Method for operating a power dissipating unit in a wind turbine
    • 用于操作风力涡轮机中的功率消散单元的方法
    • EP2918826A1
    • 2015-09-16
    • EP15159313.4
    • 2010-12-16
    • Vestas Wind Systems A/S
    • Gupta, Amit KumarSahukari, Sridhar
    • F03D7/02F03D7/04F03D9/00H02J3/38H02P3/22
    • F03D7/042F03D7/0272F03D7/0284F03D9/255F05B2270/1016H02J3/386H02P3/22H02P2101/15Y02E10/723Y02E10/763
    • A variable speed wind turbine (1) is provided. The wind turbine comprises a generator (101), a power converter (102)for converting at least a portion of electrical power generated by the generator wherein the power converter (102) comprises a generator side converter (110), a grid side converter (111) and a DC link (112) therebetween, a power dissipating unit (105) operatively coupled to the DC link (112) and a controller (121). The controller is adapted to determine power extracted from the wind, power supplied by the wind turbine and power loss in the power dissipating unit, determine the difference between the power extracted from the wind and the sum of the power supplied by the wind turbine and the power loss in the power dissipating unit and activate the power dissipating unit when the difference between the power exceeds a predefined power difference threshold.
    • 提供了一种变速风力涡轮机(1)。 风力涡轮机包括发电机(101),用于转换由发电机产生的电力的至少一部分的电力转换器(102),其中电力转换器(102)包括发电机侧转换器(110),电网侧转换器 (112)和功率消耗单元(105),所述功率消耗单元(105)可操作地耦合到所述DC链路(112)和控制器(121)。 控制器适于确定从风中提取的功率,由风力涡轮机供应的功率和功率消耗单元中的功率损耗,确定从风中提取的功率与由风力涡轮机供应的功率之和与 当功率之间的差异超过预定功率差阈值时,在功率消耗单元中的功率损失并且激活功率消耗单元。
    • 6. 发明公开
    • Method for operating a power dissipating unit in a wind turbine
    • Verfahren zum Betreiben einer Stromverteilereinheit在einer风力发电机
    • EP2360375A2
    • 2011-08-24
    • EP10195387.5
    • 2010-12-16
    • Vestas Wind Systems A/S
    • Gupta, Amit KumarSahukariI, Sridhar
    • F03D7/02F03D7/04F03D9/00
    • F03D7/042F03D7/0272F03D7/0284F03D9/255F05B2270/1016H02J3/386H02P3/22H02P2101/15Y02E10/723Y02E10/763
    • A variable speed wind turbine is provided. The wind turbine comprises a generator, a power converter for converting at least a portion of electrical power generated by the generator wherein the power converter comprises a generator side converter, a grid side converter and a DC (direct current) link therebetween, a power dissipating unit operatively coupled to the DC link and a controller. The controller is adapted to determine a DC link voltage error signal, the DC link voltage error signal being the difference between a function of an actual DC link voltage and a function of a predefined reference DC link voltage, determine a DC link error power based on the DC link voltage error signal, determine a feed forward power and generate a duty ratio for operating the power dissipating unit based on the DC link error power and the feed forward power.
    • 提供了一种变速风力涡轮机。 风力涡轮机包括发电机,用于转换由发电机产生的电力的至少一部分的功率转换器,其中功率转换器包括发电机侧转换器,电网侧转换器和它们之间的DC(直流)连接,功率消耗 可操作地耦合到DC链路的单元和控制器。 控制器适于确定直流链路电压误差信号,直流链路电压误差信号是实际直流链路电压的功能与预定义的参考直流链路电压的函数之间的差异,基于 DC链路电压误差信号,基于直流链路误差功率和前馈功率确定前馈功率并产生用于操作功率耗散单元的占空比。