Control method, device and system of solar controller
A solar controller and controller technology, applied in the field of solar power supply, can solve problems such as difficult expansion, inconvenient installation, uneven charging of multiple controllers, etc.
Active Publication Date: 2021-01-12
BEIJING EPSOLAR TECH
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Problems solved by technology
However, since each controller in the system will have sampling deviation, in the application where the photovoltaic panels are not connected in parallel but the battery is connected in parallel, there will be a problem of uneven charging of multiple controllers
The current control method of the existing solar controller adopts a hardware method for parallel current sharing, which is difficult to expand and inconvenient to install, resulting in high labor costs
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[0029] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions of the present invention will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the present invention, not all of them. the embodiment. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.
[0030] At present, in the application of multi-unit PV (photovoltaic, photovoltaic power generation) panels not in parallel but batteries in parallel, MPPT solar charge controllers have the problem of uneven charging of multiple controllers. The main reason for this problem is due to the Each controller will have sampling deviation. It is impossible for all controllers to enter the c...
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The present invention provides a solar energy controller control method, device and system. The method is applied to a current-sharing control unit; the current-sharing control unit is connected witha plurality of MPPT (Maximum Power Point Tracking) solar energy controllers; and the input ends of the MPPT solar energy controllers are connected with corresponding light cell panels, and the outputends of the MPPT solar energy controllers are connected with a storage battery pack to charge the storage battery pack. The method comprises the steps of: obtaining state information of the pluralityof MPPT solar energy controllers, wherein the state information comprises a working state, a working mode and working parameters, and the working mode comprises a maximum power point tracking mode ora voltage-limiting and current-limiting relative constant duty cycle mode; according to the working state, determining a main controller and a slave controller from the MPPT solar energy controllers;and according to the working modes, the working parameters and a predetermined parameter threshold value of the main controller and the slave controller, updating the working modes of the main controller and the slave controller. The solar energy controller control method, device and system can achieve parallel connection current-sharing control of the solar energy controller so as to improve theservice life of the products, support hot plug, are convenient for power extension through software networking and are convenient to install.
Description
technical field [0001] The invention relates to the technical field of solar power supply, in particular to a control method, device and system of a solar controller. Background technique [0002] With the development of science and technology, solar power generation technology is more and more used in industrial production and people's life. Photovoltaic power generation is a kind of solar power generation technology. It is based on the principle of photovoltaic effect to generate electric energy. Using solar cells to directly convert sunlight energy into electric energy is a clean power generation technology. [0003] At present, MPPT (Maximum Power Point Tracking, maximum power point tracking) solar charge controller is mostly used to control the process of photovoltaic panels charging the battery. However, since each controller in the system will have sampling deviation, in the application where the photovoltaic panels are not connected in parallel but the batteries are...
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IPC IPC(8): H02J7/35
CPCH02J7/35Y02E10/56
Inventor 杨汝军孙本新赵涛
Owner BEIJING EPSOLAR TECH