Urban Street Light Energy Saving Technology and Energy Saving Strategy

Urban Street Light Energy Saving Technology and Energy Saving Strategy Ma Jun (Chuzhou City Lighting Management Office, Luzhou, Shanxi 034000, China) System discusses in detail, and points out that when selecting street lighting energy saving solutions, relevant energy-saving products should be selected in combination with actual conditions to give full play to Its energy-saving effect.

Urban street lights are an important aspect of China's electricity consumption. With the increasingly tense energy supply, the voice of energy conservation is increasing. With the advancement of the "Green Lighting Project", China's lighting design and lighting product development trends are facing a "green revolution."

It will aim to save energy and resources; protect the earth's ecological environment; improve lighting quality and improve comfort and health. At present, the lighting power consumption accounts for about 15% of the country's total power consumption. Since the road lighting is now centralized with many professional three-way control street light management systems, such as the "Dandong Sanan company's street light control system," many cities have already started street lighting. Exploration of energy-saving work.

1 Mainly used street lamp energy saving technology midnight lamp mode. Midnight lights refer to street lights in small and medium-sized cities. In the latter part of the night when there is less traffic and traffic, and the brightness does not need to be too high, the way to achieve street light separation and the two rows of street lights are turned on to save energy. This type of investment is small and can be achieved only by laying two cables of relatively small size.

Single light control. Nowadays, many cities have squares, parks and other places equipped with landscape lights with large wattages and many light sources. After 12 o'clock in the evening, or after entering the cold winter, few people come out to exercise or hang out. Even without it, by installing a single light controller of Sanan Company on each single lamp, it is possible to achieve a separate on/off control of each lamp, thereby saving energy and saving energy.

Streetlight Saver. Now the street lamp energy saver has become a relatively common energy-saving product. It integrates intelligent technology, electromagnetic technology, data control technology in the body, has a very good adjustment function to achieve energy-saving effect, adjustable energy-saving rate, switch street lamp The time is adjustable, no pollution to the grid voltage, easy operation, uniform illumination, energy saving rate can reach 25% to 45%, some Power Saver also has power factor compensation.

Other energy-saving technologies and programs. The light source can be replaced by a metal halide lamp or an LED lamp to replace the traditional neon lamp. Lamps can use ip protection grade, high reflection efficiency of lighting fixtures. In addition, electrical appliances use energy-saving ballasts instead of ordinary ballasts, which can save about 5% of energy; or use inductive dimming ballasts to set more taps in ballasts and use regulators to pre-set the time. Adjust the output voltage to adjust the output current to achieve the purpose of saving power. This approach has a very good energy-saving effect, and the illumination can also achieve the corresponding effect. Or use solar street lighting system. Below we will briefly discuss these two kinds of energy-saving lamps.

2 Using Electronic Ballast Energy Saving Technology Solutions In lighting projects, ballasts are indispensable important members, and its development has also received more and more attention. For road lighting, new roads mainly use cost-effective lamps and light sources, and the old road uses new energy-saving products. Therefore, the use of energy-saving ballasts is a good street lighting energy-saving strategy. High-pressure sodium lamp electronic ballasts have superior energy-saving performance compared to traditional inductive ballasts. Taking 250W as an example, the first is low power consumption, strong illumination, and constant power output. The power consumption of the electronic ballast is only 12W, while the power consumption of the magnetic ballast itself is about 40W. In the case of the same illumination, the input power of the electronic ballast is 283.5W, while the traditional magnetic ballast is 315W. Save 30W. In addition, the use of electronic ballasts after voltage increase is more energy-efficient, because the electronic ballast has a constant output power, the voltage is between 170V ~260V, the output power is always 250W, and the inductance ballast is in the back In the middle of the night about 6h basically work at 320W. Electronic ballast also has a power automatic adjustment function, for the street lamp, in the case of no one in the middle of the night, the electronic ballast can reduce the sodium lamp power to 150W , thereby effectively reducing power consumption. Electronic ballast power factor is 0.98, while the inductance ballast does not add compensation capacitance is about 0.4, plus the compensation capacitor is only 0.7~0.8, sodium lamp works under the control of the electronic ballast is 250W, and the ballast in the inductor The power under the control of the device is about 320W, and its apparent power is respectively: 255VA and 400VA, with a difference of 145VA, that is, the flow rate required for the single sodium lamp of the electronic ballast is 145VA more than that of the use of an inductive ballast. It can reduce the capacity of the transformer and the wire diameter of the cable, thus greatly saving the investment cost; in the expansion, it is not necessary to increase the transformer.

Because the electronic ballast has the characteristics of bright day, wide frequency operating voltage, anti-interference, etc., thereby extending the service life of the bulb. According to the calculation of the replacement lamp rate of 87%, the replacement of the sodium lamp is approximately every year, and the use of electronic ballasts only needs to be replaced after 3 to 5 years. At least one street lamp can save one lamp every year. One street lamp needs to replace the sodium lamp once a year. The labor cost is much higher than the cost price of a sodium lamp. After using an inductive ballast, there is no need to replace the sodium lamp within one year, which can save the cost. When the sodium lamp is started, the electronic ballast start current is 0.35A, and the inductance ballast is 4A~5A. In normal operation, the lamp current is 1.2A. In this case, the sodium lamp of the inductance ballast is used and the current at start is normal. 3 times to 4 times of working time, and the use of electronic ballasts, the transformer capacity and the cable diameter can be significantly reduced, significantly reducing the investment cost of infrastructure. The rated working frequency of the electronic ballast is 35kHz~45kHz, which is far higher than the 50Hz of the mains. Therefore, the high pressure sodium lamp driven by the electronic ballast is good in color rendering and has no flicker. In addition, the electronic ballast has the power of the power factor control circuit and the power control circuit, and is not affected by the fluctuation of the power grid voltage, and can provide excellent road illumination. Traffic eyes do not fatigue at night, thereby reducing the incidence of traffic accidents.

The use of electronic ballasts will not cause interference to the power grid. After replacing the traditional inductive ballasts, electronic ballasts can significantly reduce the consumption of non-ferrous metals such as copper and steel, and have good economic and social benefits.

3 Use of solar street light system to achieve effective energy-saving solar streetlights take sunlight as energy source, solar panels charge batteries during the day, and power supply for light sources at night, which eliminates the need for complex and expensive pipeline laying, and can be used to adjust the layout of lights, saving energy and pollution without pollution. No manual operation is required, stable and reliable, saving electricity costs and maintenance-free. The use of solar street lights combined with a new generation of light sources (LED) collocation scheme to achieve green environmental protection and long-term benefit.

Solar street light is using solar panels, daytime Shanxi construction bookmark5 Fang Meiqi, Zhang Shuren. Complex system modeling and simulation. Beijing: Renmin University of China Press, 2011. (Continued from page 215) Solar radiant energy is received and converted into electrical energy. After charge and discharge controller is stored in the battery, the illuminance gradually decreases at night and the charge and discharge controller detects After this value, the battery discharges to the lamp 1. After the battery is discharged for 10 hours, the charge and discharge controller operates, and the battery discharge ends.

Solar street light system. The main function of the function road lighting system is to ensure road safety, improve road transport efficiency, ensure personal safety, and provide a comfortable environment. On the basis of meeting the functional needs of road lighting, the energy efficiency of road lighting systems will be improved, system power consumption will be reduced, energy will be saved, and pollution will be reduced to achieve the goals of energy conservation and environmental protection. In addition, we must consider the local light resources, local rainy weather conditions, and the fact that the panels are covered by dust, temperature, controllers, and batteries, etc. In the specific design of solar street lighting system should fully consider the local conditions. To make good use of the battery, you can ensure that the street lamp can still operate normally in the rainy days of 3d~5d. When the cloudy day exceeds the maximum number of days, the street light automatically switches to the mains lighting, and the sunny street light automatically switches to solar lighting. After the darkness, the street light will be automatically turned on, and the street light will go off automatically after dawn. When the power is turned off for a short period of time, various parameters set by the user can be saved. Since solar street lights need to absorb sunlight, solar panels are generally installed on the poles toward the direction of the sun. Generally, a plurality of solar panels are selected to make up the required power of the components. 2. When the battery is connected, the individual monomers need to be considered. The unbalanced effect between the batteries, under normal circumstances, the number of parallel groups does not exceed 4 groups. Currently, the industry uses maintenance-free, waterproof lead-acid batteries or gel batteries.

Solar street lights should also be equipped with the now popular LED energy-saving lamp heads, LED lamp heads have the characteristics of environmental protection, pollution, low power consumption, high luminous efficiency, long life, etc., therefore, LED street lamps will become the best choice for energy-saving renovation, so that both extended The service life also plays a role in saving energy and reducing consumption.

4 Other considerations when designing a street light energy saving plan After 10 o'clock in many small and medium-sized cities in China, after 12 o'clock in the big city, some non-prosperous streets have almost no vehicles and pedestrians, and these roads still maintain a high degree of illumination. There is no need, especially residential roads in residential areas, because the residents in the community have already had a rest, but there is no need to maintain high illumination. That is, when the pedestrians are less active at night, the power of the bulb is appropriately reduced, so that the bulb is operated at 60% to 70% of the rated power, which not only can save a large amount of power, but also can prolong the service life of the bulb and the ballast, thereby saving a lot of Maintenance costs. Although the lamp power is reduced by 30% to 40%, the street can also ensure that there is no blind area for road lighting, and it can fully guarantee the safe passage of the road.

In short, China's electricity demand is too large at this stage, and electricity consumption has long been in short supply. Saving energy has always been an important measure for energy reduction and emission reduction in China. Therefore, when selecting high-efficiency energy-saving street lamps, more investigations should be made, and some relevant energy-saving measures should be selected in combination with actual conditions. The product can not only play its due role but also ensure high efficiency and energy saving.

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