摘要:
A power generation system (100) is provided. The system includes a prime mover (110) for transforming a first energy to a second energy. The system also includes an induction generator (120) operatively coupled to the prime mover (110) and configured to generate electrical power using the second energy. The system further includes an inverter (180) electrically coupled to the induction generator (120) for controlling a terminal voltage of the induction generator (120) during a grid-loss condition. The system also includes a power dissipating device (200) operatively coupled to the inverter (180) for dissipating power generated by the induction generator (120) during the grid-loss condition.
摘要:
A wind power generation system 100, 300 including a doubly fed induction generator DFIG 102, 204 of a wind turbine is presented. The DFIG 102, 204 includes a rotor 103, 201 and a stator 101, 203, a rotor-side conversion unit 104, 208 coupled to the rotor, a direct current DC link 108, 209, and at least one line-side conversion unit 106, 210, 210', 210" coupled to the rotor-side conversion unit via the DC link and coupled to the stator of the DFIG. The at least one line-side conversion unit includes exactly one first converter 212, high frequency transformers 214, and second converters 216, where each of the second converters is coupled to the first converter via a respective high frequency transformer, and inverters 218, where each of the inverters is coupled to a respective second converter and includes an alternative current AC phase terminal 222, 224, 226.
摘要:
A hybrid AC and DC distribution system (200) includes a doubly fed induction generator (DFIG) (204;504), a DC distribution bus (214), an AC/DC converter (218;506), an AC distribution bus (216), and a DC/AC converter (220;508). The DFIG includes a rotor (224) and a stator (226), and is configured to generate a first AC power at the rotor and a second AC power at the stator. The AC/DC converter (218;506) is coupled to the rotor and the DC distribution bus (214). The AC/DC converter (218;506) converts the first AC power to a first DC power at a first node (228;510) for delivery to a first load (206,210) through the DC distribution bus. The DC/AC converter is coupled between the first node and a second node (230;512) coupled to the stator (226) and the AC distribution bus (216). The DC/AC converter converts the first DC power to the second AC power at the second node (230;512) for delivery to a second load (206,208) through the AC distribution bus (216).
摘要翻译:混合AC和DC分配系统(200)包括双馈感应发电机(DFIG)(204; 504),DC分配总线(214),AC / DC转换器(218; 506),AC分配总线(216 )和DC / AC转换器(220; 508)。 DFIG包括转子(224)和定子(226),并且被配置为在转子处产生第一AC电力并且在定子处产生第二AC电力。 AC / DC转换器(218; 506)耦合到转子和DC分配总线(214)。 AC / DC转换器(218; 506)将第一AC功率转换为第一节点(228; 510)处的第一DC功率,以通过DC分配总线传送到第一负载(206,210)。 DC / AC转换器耦合在第一节点和耦合到定子(226)和AC分配总线(216)的第二节点(230; 512)之间。 DC / AC转换器在第二节点(230; 512)将第一DC电力转换为第二AC电力,以通过AC分配总线(216)传送到第二负载(206,208)。
摘要:
A control method 300 for increasing reactive power generation of a wind turbine 100 having a Doubly-Fed Induction Generator DFIG 120 includes obtaining 302, by a control device 510 having one or more processors 512 and one or more memory devices 514, wind forecast data of the wind turbine 100. Further, the method 300 includes generating 304, by the control device 510, a real-time thermal model of the DFIG 120 of the wind turbine 100 using the wind forecast data. More specifically, the thermal model defines a thermal capacity for the DFIG 120 that does not exceed system limits. Thus, the method 300 also includes dynamically adjusting 306, by the control device 510, a reactive power set point of the DFIG 120 of the wind turbine 100 based on the real-time thermal model.
摘要:
An uninterruptible power supply (UPS) (120;200) includes a line terminal (202), a load terminal (204), a double-conversion circuit (216) coupled in series, and further includes a bypass circuit (218), and a synchronize circuit (220). The line terminal couples to a doubly fed induction generator (DFIG) (170). The load terminal couples to a load (130) having a demanded power. The double-conversion circuit regulates grid power from the line terminal to the demanded power at the load terminal. The bypass circuit is coupled between the line terminal and the load terminal, and configured to deliver regulated power generated by the DFIG to the load terminal when the grid power is lost. The synchronize circuit is coupled between the double-conversion circuit and the DFIG, and, when the grid power is lost, the synchronize circuit injects a current through the double-conversion circuit and into the DFIG, synchronizing the regulated power generated by the DFIG to the demanded power.