An inverter mppt control device, method and inverter
A technology of a control device and a control method, which is applied in the equal direction of converting irreversible DC power input into AC power output, can solve problems such as energy loss, and achieve the effect of solving algorithm failure
Active Publication Date: 2017-06-16
SUNGROW POWER SUPPLY CO LTD
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[0005] In view of this, the present invention provides an inverter MPPT control device and method, which effectively solves the problem of energy loss in the prior art when the input side sensor or sampling circuit fails
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[0033] For the sake of reference and clarity, the descriptions, abbreviations or abbreviations of technical terms used in the following are summarized as follows:
[0034] MPPT: Maximum power point tracking, maximum power point tracking.
[0035] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative work shall fall within the protection scope of the present invention.
[0036] See attached image 3 , Is a flowchart of an inverter MPPT control method provided by the present invention. The MPPT control method is applied to figure 2 In the MPPT control device shown, the MPP...
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The invention provides an MPPT (maximum power point tracking) control method for an inverter. The method includes the steps of acquiring current and voltage signals on the direct-current side and current and voltage signals on the alternating-current side, calculating direct-current power and alternating-current power according to the signals, judging whether or not the direct-current power and the alternating-current power satisfy a first preset condition, judging MPPT power direction change through the alternating-current power if yes, and judging MPPT power direction change through the direct-current power if not. The MPPT control method has the advantages that by means of detecting the direct-current power and the alternating-current power, when a sensor or a sampling circuit on one input side fails, MPPT power direction change is judged by the power on the other side, so that MPPT redundancy control is achieved, and problems of algorithm invalidation, energy loss and electricity generation device halt caused by the fact that the sensor or the sampling circuit on the input side fails in the prior art are solved.
Description
Technical field [0001] The invention relates to the field of electric power generation control, and more specifically, to an inverter MPPT control device, method and inverter. Background technique [0002] With the continuous development of the social economy, the demand for electricity continues to increase, and conventional energy sources are increasingly depleted. Furthermore, the power system is gradually developing towards new energy and renewable energy. The output energy of new energy and renewable energy is affected by many factors. For example, the output power of photovoltaic panels in a photovoltaic system changes significantly due to changes in light intensity and temperature. In order to improve the working efficiency of the inverter device, it is necessary to make it work at the maximum power point of the input source. [0003] Usually, the MPPT algorithm is used to track the maximum power point. The specific MPPT algorithm achieves the goal of tracking fastness and...
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IPC IPC(8): H02M7/42
CPCH02M7/44
Inventor 潘年安程林陶磊钱永恒孙龙林
Owner SUNGROW POWER SUPPLY CO LTD