The intelligent LED Taineng street lamp with wind and solar complementation has more practical and economic significance in application than the traditional street lamp. On the basis of solar street lamps, combined with the advantages of wind and solar complementation, the author designed a new intelligent LED solar street lamp system based on wind and solar complementation. The system samples the output voltage of the wind turbine, the voltage of the solar cell terminal, the battery voltage, the ambient brightness and temperature, and then enters the ARM processor for calculation, which can achieve high-precision control of the street lamp brightness. At the same time, the battery has the automatic selection function. The street lamp system can achieve significant energy saving and emission reduction, green and environmental protection effects.

1 Introduction

As new energy sources, solar energy and wind energy are both clean and environmentally friendly and "inexhaustible", and are being widely used. LED is small, durable, long life and green

It has gradually replaced the traditional street lighting with its features of high efficiency and energy conservation. Considering the economy, reliability and safety of street lamps, LED solar street lamp system of wind and solar complementary type [1] can be adopted. Although the total amount of solar radiation reaching the earth's surface is large, the energy density is very low; In addition, due to the influence of natural conditions such as day and night, season, altitude and random weather factors, the solar energy reaching a certain ground is intermittent and unstable. Therefore, the wind and solar complementary type can make up for these shortcomings of solar energy [1-2].

2 System composition

This paper designs an intelligent LED solar street light system based on wind and solar complementation. The so-called intelligent system is based on wind turbine and solar cell of wind and solar complementation

Main, supplemented by ordinary 220V AC supplementary power. The system designed in this paper is mainly divided into four parts, namely: power supply part of street lamp system, street lamp controller part, system power storage part, and street lamp output part.

2.1 Power supply design of street lamp system

The design block diagram of the power supply part of the street lamp system is shown in Figure 2. This part mainly includes photoelectric detector, wind speed sensor, solar cell, wind turbine, mains power supply, MOSFET (switch tube). The photoelectric detector is used to detect the light intensity of the external environment, that is, to determine whether it is day or night, so as to adjust the power supply type of the system. During the day, solar cells and wind turbines charge the batteries. At night or when there is no wind, LED street lamps are powered by batteries. When the battery power supply is insufficient, mains power is supplied. The purpose of the wind speed sensor is to monitor the wind speed and transmit the detection signal to the control part of the system. The selection of solar cells and wind turbines should take into account the capacity of batteries and local weather conditions. The technical parameters that determine wind power generation mainly include rated wind speed, output power and voltage.

2.2 Design of street lamp controller

The design block diagram of street lamp controller is shown in Figure 3. This part mainly includes ARM processor, equalization circuit, voltage and current acquisition circuit, fan overload protection circuit, charge discharge and power supply switching circuit. ARM processor adopts LM3S9B96, which is the core of the whole system. After analyzing and processing the data collected by the acquisition module, the processor controls the charge discharge and power supply switching circuit, the fan overload protection circuit voltage and current acquisition circuit, and finally the equalization circuit makes adjustments. ARM processor controls the circuit of charge discharge and power supply switching through PWM [3].

2.3 Design of system power storage

This part is mainly the battery, which also plays an important role in the whole system. The output of solar cells and wind turbines is stored in the battery. When the battery is overcharged, the solar cell stops charging, and the output of the wind turbine is switched to unloading, which also stops charging the battery. The capacity and voltage of the battery are the primary considerations. The capacity of the battery in this system is affected by weather conditions, lighting time and brightness of street lamps, etc.