In order to effectively control the power fluctuation caused by the change of wind speed, the control system adopts the method of adjusting the size of the unloaded load. When the difference between the measured power and the power consumption of the lead-acid battery circuit reaches a certain value, the threshold switch is closed, the unloading circuit is put into operation, and the power of the wind turbine is tracked by adjusting the current of the unloading load circuit, thereby controlling the power fluctuation caused by the instantaneous wind speed.

During the charging process of the lead-acid battery, compare the terminal voltage of the lead-acid battery and the set control point voltage, and cut off the solar cell power generation branch and the wind turbine branch in stages; in the discharge process of the lead-acid battery, compare the two A voltage, graded into the solar battery power generation branch and the wind turbine branch. In the case of no wind and no light, when the terminal voltage of the lead-acid battery drops to a certain level, it is necessary to cut off the power supply to the load to prevent the lead-acid battery from being over-discharged.
The tracking curve of the solar cell array under control is shown in Figure 1-1.

As can be seen from Figure 1-1, the system can effectively work at the maximum power point of the solar cell array, and the error is very small.

ZN100 type wind-solar hybrid LED street light controller

ZN100 wind-solar hybrid LED street light controller has the functions of controlling the conversion of solar and wind energy and charging the lead-acid battery and discharging the electric energy to the load, preventing overcharge, overdischarge, short circuit, overvoltage, undervoltage and reverse connection. Unique two-way time control and light control function, use the dial switch and LED digital tube to intuitively set the working time of the street light at night, which enables the LED street light to be fully illuminated in the first half of the night and partially illuminated in the second half of the night to achieve lighting and festivals. The organic combination of electricity, the controller is provided with a lightning protection circuit at the input end of the solar cell and the wind turbine.

The ZN100 wind-solar hybrid LED street light controller contains a three-phase rectifier bridge, which can directly convert the three-phase alternating current generated by the wind turbine into direct current, and has an automatic braking function. The mains standby automatic conversion circuit can also be selected in the controller. The mains standby circuit has an AC/DC power supply with an input power factor greater than 0.95. In order to solve the most unfavorable conditions of cloudy or no wind for several consecutive days, the street lights can work normally. The load of ZN100 wind-solar hybrid LED street light controller is 60~200w high-power LED module. The main technical indicators of ZN100 wind-solar hybrid LED street light controller are as follows.

(1) Constant power of solar cell: 100~120w.
(2) Rated power of wind turbine: 100~400w.
(3) The output power is 200w, each output current: 6~10A.
(4) Rated battery voltage: 12V DC/24V DC.
(5) Maximum charging current: 20A.
(6) ZN100-12 wind-solar hybrid LED street light controller is suitable for 12V light source: ZN100-24 wind-solar hybrid LED street light controller is suitable for 24V light source.
(7) The illuminance of turning on the street light: ≤51x. Turn off the illuminance of street lights: ≥101x.
(8) The first way is light control switch; the second way is light control open, time control close, the time is set to 1~9h. For example, the 168W LED street light is divided into two channels, the first channel is 68W, and the second channel is 100W. The first channel is turned on when the light is ≤51x, and turned off when the light is ≥101x. The time of the second channel is set to 6h. When the light is ≤51x, the second channel is turned on and turned off after 6h. Then the 168W LED street lights are fully lit from 6:00 to 12:00 in the evening, and only 68W from 12:00 to 6:00 in the morning, and the street lights will automatically turn off after dawn.
(9) Wind turbine braking action voltage: 31±0.5V.
(10) Solar battery stop charging voltage: >28.8V, under-voltage protection voltage: 21±0.5V. Charging current after under-voltage protection: ≥0.5A.
(11) Wiring method:
① Connect the “+” and “-” ends of the solar cell module to the terminals 1 and 2 of the first row of the wind-solar hybrid controller respectively.
Solar) terminal.
② Connect the “+” and “-” ends of the battery to 3 and 4 (Battery) of the first row of terminals of the wind-solar hybrid controller respectively.
terminal.
③ Connect the three-phase output end of the wind turbine to the terminals 1, 2, and 3 (Wind) of the second row of the wind-solar hybrid controller respectively.
terminal.
④ Connect the “+” and “-” ends of the first group of LED light sources to the terminals 1 and 2 (LED1) of the third row of terminals of the wind-solar hybrid controller, respectively, and the “+” and “-” ends of the second group of LED light sources. Connect to terminals 3, 4 (LED2) of the third row of terminals.
(12) Time setting: Set the second LED of the street light. The 4-position dial switch is 1 on the top, 0 on the bottom, from high to low from left to right, 0001 for 1, 0010 for 2, 0011 for 3, 0100 for 4, 0101 for 5, 0110 for 6, and 0111 for 7 , 1000 stands for 8, 1001 stands for 9, in order to see the setting intuitively, press the button switch on the left, the digital tube will display the set number, reset the button switch after setting, the digital tube will go out, use dial The advantage of the disk switch is that the set data will not be lost due to power failure.
Combined with the practical application of the specific wind-solar hybrid LED street lights, the solar cell determines the day and night, and realizes unmanned management. The control logic flow chart of wind-solar hybrid LED street light is shown in Figure 1-2, which divides the system into the following three states.
State 1: The voltage of the lead-acid battery is too low and cannot be discharged, otherwise the life of the lead-acid battery will be affected.
Status 2: The voltage of the lead-acid battery is normal and can be charged and discharged.
State 3: The voltage of the lead-acid battery is too high, which will damage the load. It needs to be discharged before it can be connected to the load.