Adaptive control method for brightness of street lamp using solar energy for power supply

Abstract

The invention discloses an adaptive control method for the brightness of a solar street lamp, and the method is applicable to a solar street lamp provided with a singlechip, an MPPT (maximum power point tracking) circuit, an overcharge / overdischarge protection unit and a remaining power calculating unit, and is characterized by comprising the following steps: step one, predicting the remaining power by measuring the internal resistance of a battery; and step two, carrying out adaptive adjustment on the brightness: calculating the power consumption of the lamp on the same day based on the charging capability and the remaining power of the battery of the solar energy street lamp on the same day, and calculating the brightness of the solar street lamp at each time slot indirectly. Compared with the prior art, the brightness of the street lamp is adjusted to lead the battery to be at a high potential for a long term and work under the condition of less charging and discharging for a long term, thus the purposes of prolonging the service life of the battery, lowering the cost and improving the reliability of a solar street lamp system can be achieved.

Description

technical field [0001] The invention relates to the technical field of solar energy environmental protection applications, in particular to a control system for improving the reliability of circuit lamps powered by pure solar energy. Background technique [0002] In the prior art, as a street lamp system powered solely by solar energy, there are still many technical problems, which directly affect its cost and use effect. At present, the problems and cost of solar street lamps mainly include the following points: [0003] 1) The battery life of solar street lights is generally not long [0004] The cost of solar street lights is mainly concentrated on batteries, battery panels and LEDs. The life of battery panels is about 15 years, and the life of LEDs is 5 years. With the gradual decline in the cost of battery panels and LEDs, battery costs basically account for 30%-40% of the cost of the whole lamp, so how to control the cost of the battery will be the key to cost contro...

AI Technical Summary

Problems solved by technology

[0006] 2) The uneven distribution of solar energy throughout the year increases the difficulty of design

[0012] 3) Uneven brightness

[0013] This problem is due to the fact that the solar street lights have not established a network with each other, resulting in a lack of communication between the lights, resulting in a large difference in the brightness of the lights, uneven brightness, and even inconvenience and danger to drivers.

[0014] 4) Unreliable use in continuous rainy days

[0015] When there is continuous rainfall, normal lighting cannot be guaranteed, which will cause inconvenience to travel

[0016] 5) Unreasonable post-maintenance causes solar street lights to fail to optimize their work, and maintenance is inconvenient

[0017] The working status and environment of each component of the street lighting system are not monitored, there is no early warning function, and precise control cannot be performed. Maintenance is only performed when the lights are not on, and the system cannot be guaranteed to work in the best state; if the system is to be repaired It is very inconvenient to upgrade software without establishing a network, which increases maintenance costs

[0018] In general, all current contradictions and problems are directly or indirectly related to system energy and its optimal use. Cost and reliability issues are often the "bottleneck" problems in the current promotion of solar street lights.

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