Wind power generation controller
A controller and generator technology, applied in the direction of collectors, control systems, control generators, etc., can solve the problem of not being able to achieve the maximum power point tracking pulse charging at the same time, and achieve the effects of simple circuit, reduced power consumption and reliable operation
Active Publication Date: 2015-02-11
GUANGZHOU HKUST FOK YING TUNG RES INST
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Problems solved by technology
Apparently, the circuit topology of the above-mentioned small wind power generator controller requires the battery to be directly connected in parallel with the DC bus to maintain the voltage stability of the DC bus, so it is impossible to directly use this method for pulse charging of the lead-acid battery. Machine controller can not achieve maximum power point tracking (MPPT) and pulse charging at the same time
Method used
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Embodiment 1
[0027] First, some terms used in this embodiment will be briefly explained.
[0028] Boost conversion circuit: The conversion circuit whose average value of the DC output voltage is higher than the input voltage is called a boost conversion circuit, also known as a boost circuit.
[0029] The duty cycle refers to the ratio of the conduction time of the switch tube in the boost conversion circuit to the duty cycle of the switch tube. For example, the pulse sequence with a pulse width of 1 μs and a signal period of 4 μs has a duty cycle of 0.25.
[0030] Pulse Width Modulation (PWM) is the abbreviation of "Pulse Width Modulation" in English, referred to as Pulse Width Modulation. It keeps the working cycle of the switching tube unchanged, changes the conduction time of the switching tube, and keeps the cycle of the output voltage waveform unchanged. Only the pulse width is changed. Width, this is the basic idea of pulse width modulation (PWM).
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The invention discloses a wind power generation controller. The wind power generation controller is provided with an input port, a direct current output port and a storage battery connecting port, the input port is connected with a power generator, the direct current output port is connected with a load, and the storage battery connecting port is connected with a storage battery. The wind power generation controller comprises a main circuit and a control circuit, wherein the main circuit comprises a rectifying circuit, a fore-stage boosting conversion circuit, a voltage stabilizing circuit, a post-stage boosting conversion circuit and a charging switch, the charging switch is connected with a diode in parallel, the voltage stabilizing circuit is used for absorbing a negative pulse which is released by pulse charging of the storage battery, and maintaining the stable voltage of the direct current output port, the charging switch is used for providing a charging passage for a positive pulse, the control circuit comprises a processor, the processor is used for receiving an input signal obtained by the main circuit, and generating and outputting the control signal to the main circuit, the processor is used for changing the duty cycle of a pulse width modulation signal of the fore-stage boosting conversion circuit so as to change the output current, the output power of the power generator is detected to track the maximum power point, and the processor is used for changing the current size of the negative pulse according to the duty ratio of a pulse width modulation signal of the post-stage boosting conversion circuit.
Description
technical field [0001] The invention belongs to the technical field of wind power generation, and in particular relates to a small wind power generation controller. Background technique [0002] Maximum power point tracking (Maximum Power Point Tracing, MPPT) technology and lead-acid battery pulse charging technology are two important technologies in small wind power generation. MPPT technology can make small wind turbines always have the maximum capture rate of wind energy under different wind speed conditions, so that the output power can reach the maximum. Lead-acid battery pulse charging technology can improve the active material inside the battery, shorten the charging time, and prolong the service life of the battery. [0003] In order to realize the simple control method and track the maximum power point of the mountain climbing method, the circuit topology generally adopted by the controller of the existing off-grid small wind turbine is as follows: the three-phase ...
Claims
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IPC IPC(8): H02P9/00H02J7/14G05F1/67
CPCY02T10/92H02P9/00G05F1/67H02J7/1415H02J7/1492
Inventor 欧宝星傅秀聪吴池力赵汝恒黄俊伟李跃鹏朱龙潜
Owner GUANGZHOU HKUST FOK YING TUNG RES INST