Constant-speed and constant-voltage wind-driven generator
A technology for wind turbines and generators, which is applied in the direction of controlling generators through magnetic field changes, can solve the problems of voltage drop, low wind utilization rate, etc., and achieve the effect of low cost
Inactive Publication Date: 2012-04-11
YONGCHANG INSTR & METER IND TIANTAI COUNTY
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[0002] At present, with the continuous development of renewable energy, energy storage has become a major project in technology. Wind power generation is a relatively common technical means used in renewable energy. It has developed rapidly in recent years, but wind power generators need to Grid-connected use, when running in parallel with a conventional large power grid, there will be responses to grid voltage disturbances including asymmetrical grids, voltage drops, grid voltage harmonics, grid voltage phase and frequency fluctuations, and when the wind speed is greater than the design value (generally at 5 m / s), the current wind turbines can only be used at 5 m / s, and are generally realized with variable pitch technology, resulting in problems such as low utilization of wind
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[0010] Such as figure 1 As shown, a wind turbine with constant speed and pressure. The wind turbine converts wind energy into mechanical energy to drive the generator to rotate to generate electricity. The wind turbine is equipped with a wind speed sensor that measures wind speed. The wind speed information measured by the wind speed sensor is transmitted to the generator. Excitation current controller, the excitation current controller automatically adjusts the size of the excitation current provided to the generator according to the wind speed information after comparison, so that the wind generator outputs a constant voltage.
[0011] The above-mentioned excitation current controller compares the set value with the wind speed information measured by the wind speed sensor based on the relationship curve of the third power of the wind speed and the excitation current proportional to the excitation current, and then adjusts the size of the excitation current until the size of the ...
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The invention belongs to the technical field of wind-driven generators, and relates to a constant-speed and constant-voltage wind-driven generator. A wind machine is used for converting wind energy into mechanical energy for driving the generator to rotate for generating power for the outside; the wind machine is provided with a wind speed sensor for measuring the wind speed; the wind speed information measured by using the wind speed sensor is transmitted to an exciting current controller of the generator; and the exciting current controller is used for automatically adjusting the magnitude of exciting current supplied to the generator by comparing according to the wind speed information, so that the wind-driven generator outputs constant voltage. Due to the adoption of the structure in the wind-driven generator, the wind-driven generator has the advantage of high efficiency, stability, convenience, capability of using wind energy at high or low speed, low cost, stable running and the like.
Description
Technical field [0001] The invention belongs to the technical field of wind generators, and relates to a constant speed and constant voltage wind generator. Background technique [0002] At present, with the continuous development of renewable energy today, energy storage has become a major technology project. Wind power generation is currently a relatively common technical means used in renewable energy. It has developed rapidly in recent years, but wind power generators need Grid-connected use, when running in parallel with a conventional large grid, there will be responses to grid voltage disturbances including asymmetric grids, voltage drops, grid voltage harmonics, grid voltage phase and frequency fluctuations, and when the wind speed is greater than the design value (generally At 5 m / s), current wind turbines can only be used at 5 m / s, which is generally realized with variable pitch technology, which causes problems such as low wind utilization. Summary of the invention [...
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IPC IPC(8): H02P9/14
Inventor 赵光天
Owner YONGCHANG INSTR & METER IND TIANTAI COUNTY