* The percentage of voltage loss per 1 ampere of the three-phase line is % A*km; at 10%, the corresponding cable cross-sectional area is selected. For easy wiring, the distribution cable is a single-core VV cable.
In the same way, the line loss of N2~N8 is calculated, and the corresponding cross-sectional area of ​​the cable is selected.
In the middle of the night when the traffic flow and the flow of people are reduced, the street lights are used to control the throttle sets 1 and 3, and half of the street lights are turned off, which can save a lot of electric energy under the illumination that meets the traffic needs. Turn off the street light as shown in the black circle. At this time, the voltage loss on the loop should be calculated according to the two-phase*zero-line balanced load line of the phase-connected voltage, that is, Aui% = 1.5AU*%IL. At this time, the load calculation current is only 2/3 of the original, then AU1% = =AUa%IL, with the original %, can meet the pressure drop loss requirements. The voltage loss on the N2 loop should be calculated according to the single-phase load line of the phase-connected voltage, ie Au2% = 2Au%IL. At this time, the load calculation current is only 1/3 of the original, then ~2%=2/34% of the Ministry of Aviation Industry The fourth plan is designed and researched. Factory Power Distribution Design Manual Chongqing Lighting Society Outdoor Lighting Committee held ~13th Chongqing Lighting Society Outdoor Lighting Professional Committee organized a special seminar on the application of urban road lighting voltage regulation and energy saving technology. Experts and engineering technicians from the Science and Technology Department of Chongqing Municipal Administration Committee, Lighting Department, Chongqing Street Light Management Office, Chongqing Design Institute Municipal Planning and Design Institute, Chongqing University and other units participated. Invited Dong Haocheng, a senior engineer of the Sichuan Building Materials Design Institute, to introduce a voltage regulator power supply device suitable for gas discharge lamps for road lighting in recent years, introducing its principle and anti-pressure energy-saving effect, participating in the event. The personnel inspected the operation of the Binjiang Road project in Nanchong City designed by the Chongqing Municipal Design Institute Municipal Branch. This event received good results.
The event was chaired by Li Shengtao, deputy director of the Outdoor Lighting Committee of the Chongqing Lighting Society, and Li Shengtao, director of the Municipal Planning and Design Institute of the Municipal Design Institute. Zhao Zhiyu, Engineer of the Municipal Science and Technology Department, and Yao Xiaoli, Lighting Department (Special Secretary) Chen Guangming, senior engineer of the street lamp management office (deputy director of the special committee) participated in the seminar. Associate Professor Yang Chunyu, Associate Professor and Secretary General of Chongqing Lighting Society, and Deng Shenjun, Senior Engineer of the Society, also participated in the seminar.
The Nanchong City Construction Committee of Sichuan Province and Chengdu Sai Lu Debei Power System Engineering Company gave strong support to this special event.
For details on the actual content of the seminar, please refer to the article “Application of Voltage-Regulating Energy-Saving Technology in Urban Road Lighting†in this issue.
(Deng Shenjun)
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