Off-grid wind power generation system and method
A technology of wind power generation system and wind power generator, which is applied in the direction of wind power generation, wind power engine, wind power motor combination, etc., and can solve problems such as low system inertia, decreased system stability, and load power fluctuations
Pending Publication Date: 2021-05-11
SOUTH CHINA UNIV OF TECH
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Problems solved by technology
Of course, the off-grid wind power generation system also faces some technical challenges, such as wind energy fluctuations or intermittent, unpredictable load power fluctuations, and relatively low system inertia will lead to a decrease in system stability
Method used
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[0047] In order to make the purpose, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below with examples and accompanying drawings. It should be noted that the embodiments described here are only for explaining the present invention, and the embodiments of the present invention are not limited thereto.
[0048] Such as figure 1 As shown, the basic structure of this embodiment includes a wind turbine 1, a main load 3, an adjustable heat load 4, a transformer 2 and a control device 5 (robust sliding mode controller). The wind power generator 1 includes a wind turbine 11 and a permanent magnet synchronous generator 12 connected in sequence; the permanent magnet synchronous generator 12 is connected to the main load 3 and the adjustable heat load 4 . This embodiment also provides a power generation method for an off-grid wind power generation system, the basic steps of which include:
[0049] S1, the w...
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The invention discloses an off-grid wind power generation system and method. The system comprises a wind power generator, a main load, an adjustable heat load, a transformer and a control device used for achieving maximum wind energy tracking, wherein the wind driven generator, the transformer and the main load are sequentially connected; the wind driven generator is respectively connected to the adjustable heat load; and the control device is connected to the adjustable heat load. According to the invention, the coordination control task of the system is given to the adjustable heat load instead of being borne by a traditional PWM-driven rectification or inversion device, so that the expensive investment cost of power electronic equipment is reduced, and the designed robust sliding mode controller is quick in response and strong in anti-interference capability, and ensures the stable operation of the system.
Description
technical field [0001] The invention relates to the technical field of wind power generation, in particular to an off-grid wind power generation system and method. Background technique [0002] In recent years, the installed capacity of wind power has grown rapidly, and the total installed capacity of wind power in my country will exceed 30GW by 2020. At present, there are two ways of wind power generation: grid-connected wind power and off-grid wind power. In the grid-connected mode, due to the randomness and intermittent nature of wind energy, wind power generation will bring power quality problems such as voltage and frequency fluctuations to the grid, and even threaten the stability of the grid. In addition, wind farms are usually located in remote areas with abundant wind energy resources but far away from the load center. It requires a long transmission line to transmit electric energy to the grid, and the upgrade and maintenance costs are high. At the same time, alt...
Claims
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IPC IPC(8): F03D9/25F03D7/02F03D7/04H02J3/38
CPCF03D9/25F03D7/0272F03D7/0276F03D7/028F03D7/042H02J3/388H02J2300/28Y02E10/72Y02E10/76
Inventor 吴青华林育庆刘洋
Owner SOUTH CHINA UNIV OF TECH