Street Lamp Distribution Network Energy Saving System Design Based On Automatic Voltage Regulation And Reactive Compensation

Construction scale of street lighting is increasing with the rapid development of Chinese economy and the deepening of the new urbanization construction. Large amount of electric energy consumption increases environmental pollution and electricity costs. The fact that power distribution network voltage is on the high side may generate a large quantity of heat and accelerate lamp damage. Moreover, Low power factor can induce large loop current and cause electric energy loss in line and distribution transformer. In this paper, a street lamp distribution network energy saving system is designed based on automatic voltage regulation and reactive power compensation. The system consists of monitoring master station, communication network and energy-saving device. Automatic voltage regulation and reactive power compensation technique are firstly comprehensively applied at home to achieve the street lamp energy saving. Moreover, monitoring master station can monitor and deploy in real time. The system does not only achieve energy saving and emission reduction, reduce synthetic operation cost, but also improve the automatic management level of street lamp and reduce traffic accidents. The proposed street lamp energy saving technique is of the lead position in domestic level.The research background and significance is firstly illustrated in the paper. Research status of street lamp monitoring system is deeply investigated and electrical characteristic of high voltage sodium lamp is analyzed. The principles of automatic voltage regulation and reactive compensation are studied. System functional requirements and overall design scheme is proposed based on market requirement and government standard.Secondly, based on Mega128L microcontroller, the hardware design of automatic voltage regulation and reactive compensation energy saving terminal is carried out which include microcomputer minimum system, real time clock interface circuit, human-machine interface, voltage and current sampling circuit, memory module, voltage regulating module, reactive compensation module, GPRS communication interface and RS485 interface circuit.Thirdly, software design of energy saving system is completed. In order to realize the main function of energy saving terminal, main program flow chart, GPRS communication flow chart, real-time clock, voltage regulation flow chart and voltage regulation flow chart are designed. The kernel program for RS485 communication is given. System function framework and client interface of the monitoring master station software of energy saving system is completed.Finally, the street lamp energy saving system is actually operated and energy-saving effect is analyzed. The installation scheme for most street lamp of Jinan city is designed and executed. The calculation and analysis about energy saving is done and the energy-saving effect is remarkable. Attentions on installation maintenance and handling method for common fault are also summarized.This street lamp energy saving system has not only remote monitoring function based on GPRS, but also can achieve reactive power optimization and voltage regulation. The energy-saving effect is outstanding in the same time that normal lighting is guaranteed. The comprehensive management level of street lamp is improved. The designed street lamp energy saving system has capacious market future and has already equipped in large quantities at Jinan, Shenyang and so on.