Jiajia street lamp annual electricity bill for nearly 100 million

Recently, the author learned from the Nanhu Power Supply Bureau of Jiaxing Electric Power Bureau that by implementing energy-saving lamp promotion and reducing the time for turning on the lights, the annual power consumption of the city's nearly 40,000 street lamps has been greatly reduced from 150 million kwh to more than 30 million kwh. The annual electricity saving fee is nearly 100 million yuan, and the city's green lighting is realized while ensuring normal use.

Beautiful Jiaxing night view


Increase energy-saving lamps to reduce lighting time
Before 1998, there were only 7000 street lamps in the city, and most of them were mercury lamps, which had higher energy consumption. To this end, the power sector has increased the promotion of energy-saving lamps. In addition to the use of energy-saving sodium lamps for new street lamps, the energy-saving sodium lamps have also been consciously replaced in the renovation of old communities and daily maintenance of street lamps. However, this move once raised doubts: the price of sodium lamps is one-third higher than that of mercury lamps. Is such a large investment worthwhile?
“The sodium lamp saves 40% of electricity and has a longer life than the mercury lamp, and the price is only equivalent to the electricity cost saved in half a month.” The relevant personnel of the Nanhu Power Supply Bureau calculated the account for the reporter.
As of the end of last month, the city's local-level street lamps have increased to nearly 40,000, of which more than 90% have adopted energy-saving sodium lamps. In addition, the bureau also actively promoted LED light sources that consume only one-eighth of the incandescent light, and installed solar street lights, wind-solar complementary street lights, high-power energy-saving lamps, etc. in some sections to make energy-saving "addition".
In terms of “subtraction”, in order to shorten the time for turning on the lights, the Nanhu Power Supply Bureau uses sub-time control of the street light switch to form three kinds of lighting modes, such as all-night light, extinction after 22 o'clock, and extinction after 24 o'clock. Electricity is 50%.



Adding technology to reduce human error "In order to ensure the normal use of street lamps and achieve urban green lighting, we have also opened up new ways of saving energy in science and technology." The relevant personnel of Nanhu Power Supply Branch said that the second "addition" of street lamp energy saving is the introduction of street lamps. Intelligent control system.
The system adopts the method of “light control priority and time control guarantee”, which can realize the integration and smooth control of street lamps, and has on/off lamp illumination limit and last time limit. Once the sensitivity of the photosensitive probe outside the intelligent control is low, the measured value is low. At the lower end of the illuminance, the computer automatically sends a command via the wireless network. Whether it is sunny or rainy days, it can accurately control the time when the street lights are turned on and off, to avoid energy waste caused by early opening or late closing.
According to statistics, only the use of this technology addition of energy-saving technology, urban nearly 40,000 street lamps can reduce electricity costs by 15% a year, while avoiding the error caused by manual lighting.
In addition, Nanhu Power Supply Branch has introduced high-tech accessories such as variable power ballasts and streetlight power savers to reduce losses. At present, the urban area adopts the road of variable power ballast, the street lamp power saving rate is about 35%; and the road with the street lamp power saver can save more than 30%.

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