introduction
The current huge energy consumption and the resulting energy shortages and price increases have made saving energy a very urgent task. The National/Eleventh Five-Year Plan No. 0 proposes/need to save resources as a basic national policy. It is the first time to propose a target of reducing energy consumption per unit of GDP by about 20% during the 11th Five-Year Plan period. The former Ministry of Construction clearly stated in the 5/11-50 Green Lighting Project Planning Outline 6 that the cumulative power saving should reach 25% from 2006 to 2010.
As a new type of green light source, LED cold light source has the characteristics of energy saving, environmental protection and long life, which is the development trend of future lighting. In early 2009, the Ministry of Science and Technology of China launched the “Ten Cities and Ten Thousands of Semiconductors Lighting Demonstration City Program, which covers 21 domestically developed cities such as Beijing, Shanghai, Shenzhen and Wuhan. The implementation of this plan will effectively guide the healthy and rapid development of semiconductor lighting applications in China.
This topic is an intelligent street lamp energy-saving control system based on LED cold light source road lighting, which effectively solves the existing road lighting management system. It is difficult to feedback street lamp status information, there is no timely switch light, and there is basically no power saving effect. problem.
1. LED technology overview
LED (Light Emitting Diode) is a solid-state semiconductor device that directly converts electricity into light [1]. LED light source has the characteristics of high energy saving, environmental protection, long life, small size, strong applicability, high stability, short response time, etc. It can be widely used in various indications, displays, decorations, backlights, general lighting and cities. Night scenes and other fields [2]. Although the price is more expensive than existing lighting equipment, it is still considered an ideal substitute.
In terms of energy saving, LED has DC drive, ultra-low power consumption (single tube <0.1W), compared with traditional light source, LED light source is close to point light source, single-phase light, good light distribution, high light efficiency utilization. In terms of average illuminance, the brightness of a 50W LED lamp can be comparable to that of a 100W high-pressure sodium lamp. If it is in terms of illumination, it is higher. The same lighting effect is more than 50% energy saving than traditional light sources (taking practical applications as an example).
The LED light source is a solid cold light source, epoxy resin package, and there is no loose part in the lamp body, and there are no shortcomings such as filament light emission, heat deposition and the like. When the luminous flux is attenuated to 70%, its lifetime reaches 50,000h, and the life of high-pressure sodium lamps is 10,000~20000h. And its environmental benefits are better, the color of the luminescence is pure, does not contain ultraviolet and infrared radiation, and does not contain mercury, no pollution, waste can be easily recycled. The cold light source is safe to touch and is a typical green lighting source.
2. Overall structure of street lamp energy-saving control system
Considering the requirements of cost, monitoring range, control point setting, and capacity expansion, a combination of wireless communication and power carrier communication is adopted in this design.
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