In remote mountainous areas and rural areas, due to the lack of electricity, there are almost no street lamps installed on rural roads, which is very unfavorable for residents to travel at night. The use of wind energy and solar energy in power generation has gradually matured, and the grid connection of wind solar complementary street lamp power generation system has further advanced its industrial technology. In remote mountainous areas, rural areas and other areas, where air pollution is relatively low, buildings are less sheltered, the terrain is open, and solar energy and wind energy are sufficient, landscape resources can be fully considered and complementary street lamps can be installed to improve the living environment of residents.

Scenery complementary lamps

The operation process of each part of the system is: the controller detects the output voltage and current of the photovoltaic cell, calculates the maximum power point of the photovoltaic array output according to the output voltage and current value of the photovoltaic array, controls the DC/DC circuit through the MPPT algorithm, so that the DC/DC output voltage is always higher than the current voltage of the battery, and then improves the charging efficiency of the battery; When the output voltage and current of the photovoltaic cell system are abnormal or have problems, cut off the photovoltaic power generation system and maintain it.

The controller starts the fan power generation system according to the measured wind speed, and the three-phase communication voltage output by the fan is filtered through uncontrolled rectification. After the controller detects the output voltage and current, it provides the battery with a suitable charging voltage according to the voltage of the battery; When the battery is full and the fan communication output voltage is too high, the controller starts the unloading circuit to maintain the fan. When strong wind exceeds the wind speed requirement of the fan, the fan will automatically brake and the controller will block the fan power generation system until the wind speed is normal. The controller handles the storage battery. After patrolling the voltage, current and temperature of the storage battery, it controls the charging and discharging of the storage battery, and carries out over charging and over discharging maintenance on the storage battery. The system control circuit landscape complementary street lamp control system circuit is mainly divided into four parts: photovoltaic power generation, wind turbine power generation, battery management, LED current control. The circuits and control methods of each part are as follows. The problem of photovoltaic power generation with photovoltaic power conversion circuit is that the output characteristics of photovoltaic cells are greatly affected by the external environment, and the changes of cell surface temperature and sunlight intensity can lead to significant changes in the output characteristics.

Under a given temperature and light intensity, photovoltaic cells will reach the maximum output power at a specific operation point, which is called the Maximum Power Point. However, because the output characteristics of solar cells are chaotic and nonlinear, it is difficult to determine its mathematical model, and the maximum power can not be obtained by analytical method. In order to make the battery always work at the maximum power point during charging, the Maximum Power Point Tracking (MPPT) technology came into being. It participates in the maximum power tracking link between photovoltaic cells and batteries, which can not only track the maximum output power of photovoltaic arrays, but also output a stable voltage to charge the batteries. Its purpose is to enable the solar panel to adjust its operating point rapidly to maintain the maximum power point when the environment changes.