Soft cut-in control device and control method for permanent magnet direct drive wind turbine
A permanent magnet direct drive and control device technology, which is applied in circuit devices, wind power generation, AC network circuits, etc.
Inactive Publication Date: 2018-06-15
华能新能源股份有限公司辽宁分公司 +3
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[0004] Aiming at the problem that inrush current is easy to occur in the process of wind turbine grid connection, the present invention provides a soft grid connection control device and control method for permanent magnet direct drive wind turbines, including: MPU controller, rectifier, LC filter, Boost converter, inverter Transformer bridge, LCL filter, first drive module, second drive module, auxiliary load, first contactor, second contactor, first voltage sensor, second voltage sensor, third voltage sensor, fourth voltage sensor and current sensor; where,
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[0056] In the following description, for purposes of explanation, numerous specific details are set forth in order to provide a thorough understanding of one or more embodiments. It may be evident, however, that these embodiments may be practiced without these specific details. In other instances, well-known structures and devices are shown in block diagram form in order to facilitate describing one or more embodiments.
[0057] Specific embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings.
[0058] like figure 1 As shown, the soft grid-connected control device for the permanent magnet direct drive wind turbine provided by the embodiment of the present invention includes: MPU controller 1, rectifier 2, LC filter 3, Boost converter 4, inverter bridge 5, LCL filter 6 , auxiliary load Rz, first contactor K1, second contactor K2, first drive module 7, second drive module 8, first voltage sensor UT1, second voltage s...
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The invention provides a soft cut-in control device and control method for a permanent magnet direct drive wind turbine. The device comprises an MPU controller, a rectifier, an LC filter, a Boost converter, an inverter bridge, an LCL filter, a first driving module, a second drive module, an auxiliary load, a first contactor, a second contactor, a first voltage sensor, a second voltage sensor, a third voltage sensor, a fourth voltage sensor, and a current sensor. According to the soft cut-in control device and control method of the present invention, the auxiliary load is introduced to a grid connection side, so that the permanent magnet direct-drive wind turbine can operate in a loaded manner before grid connection, and therefore, the defect of poor stability during no-load grid connectionoperation can be avoided; and a support vector machine prediction model is adopted to control the output voltage of the permanent magnet direct drive wind turbine, so that the amplitude, frequency, and phase of the output voltage of the permanent magnet direct drive wind turbine can be better consistent with the amplitude, frequency, and phase of the voltage of a power grid, and therefore, impacton the power grid during the grid connection can be reduced.
Description
technical field [0001] The present invention relates to the technical field of wind power generation, and more specifically, to a soft grid-connected control device and a control method for a permanent magnet direct-drive wind turbine. Background technique [0002] With the continuous development of social economy and the aggravation of energy crisis, the development and utilization of renewable energy has been paid more and more attention in the world today. Wind power has the advantages of cleanness and rich reserves, and its development advantages in many renewable energy sources are very obvious. The grid-connected power generation mode is the main form of large-scale wind power exploitation and utilization. During the transition process of wind turbines connected to the grid, it is easy to generate a large inrush current, which will affect the grid. With the continuous increase of wind turbine capacity, how to realize its soft grid connection has become an urgent prob...
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IPC IPC(8): H02J3/38
CPCH02J3/386Y02E10/76
Inventor 黄海燕吕建波黄力哲葛建宏刘长良刘卫亮
Owner 华能新能源股份有限公司辽宁分公司