introduction
China's urban lighting has been rapidly developed along with the acceleration of China's urbanization process. However, the energy demand and consumption in the development of urban lighting is also increasing. In general, green lighting work still has problems such as high energy consumption, high pollution, and low efficiency.
According to the survey, China's current street lamps are mainly low-efficiency lighting, and the energy utilization rate is low.
In view of the serious pollution, power waste, high energy density and low lighting efficiency in the lighting, researching the street lamp energy-saving control system and promoting street lighting energy-saving and energy-saving will play an active role in promoting the overall development of green lighting.
1 The current shortage of street lighting systems
In modern society, the street lighting of urban charm business cards and windows has created a splendid urban civilization and brought some problems. Energy consumption has become the key to restricting the development of current street lighting systems.
1.1 Large voltage fluctuations - waste of operation
Since the change in the grid load varies with the time period, the corresponding voltage fluctuation is also large. In the middle of the night when there are more pedestrians and vehicles, the voltage is lower and the brightness is darker; in the middle of the night, it is extremely bright, which is caused by the voltage rise due to the change of the grid load. Large voltage fluctuations increase the ratio of electricity to heat conversion, reducing the efficiency of the luminaire and causing waste of electrical energy.
1.2 Line loss is large --- line waste
The street lamp has a long power supply line and low power, so the line loss is large. At the same time, the general 220 V single-phase voltage-powered street lamp has a serious three-phase unbalance, which will cause excessive zero-sequence current and zero displacement. Increased circuit losses.
1.3 extensive management methods - indirect waste
At present, the line control of street lighting is relatively simple, and it is impossible to monitor, record and count the operation results. The discovery of abnormal equipment depends on manual inspection. It is found that the fault is not timely, and the efficiency of handling the fault is not high, which ultimately leads to waste of manpower and material resources.
In order to solve the problems existing in the street lamp system, LED street lamps with the advantages of energy saving, environmental protection and longevity have been highly valued by the low carbon society. Research and development of LED street lamp energy-saving control system, improve resource utilization and save energy, has become the top priority of street lamp energy saving.
2 LED street light energy saving control system based on wireless sensing technology
The LED street lamp energy-saving control system based on the wireless sensor technology can monitor the switch state of the LED street lamp in real time, and simultaneously detect and collect various parameter information of the LED street lamp. All kinds of parameter information (switch status, current, voltage, brightness, temperature, etc.) of the LED street lamp are transmitted to the monitoring center in real time via the wireless sensor node around the LED street lamp. Based on this, the system designs the maintenance plan and issues an alarm to notify the fault handling, saving labor costs, improving the efficiency of fault handling, and realizing the intelligentization of street lamp management.
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