1 Project background
1.1 Current situation
At present, many cities in my country have put the construction of smart cities and urban energy-saving transformations on the agenda, using information technology to improve urban public services and improve the urban living environment, making cities more "smart" and more energy-efficient. As an energy-saving infrastructure, green lighting is an important part of the construction of smart energy-saving cities. With energy shortages, the greenhouse effect becoming more and more serious, and the state and local governments are vigorously calling for energy conservation, emission reduction, and green lighting, effective control of road lighting energy consumption, increase street lamp life, and reduce maintenance and management costs are a modern efficiency-oriented society One of the goals of construction is also the inevitable trend of urban smart construction.
Urban public lighting system is an important public infrastructure closely related to people’s lives. With the acceleration of urbanization, the demand for urban public lighting facilities and the scale of construction are increasing. However, the rapid development of urban public lighting has increased the energy At the same time, there are many shortcomings in management, so that urban public lighting systems generally suffer from high equipment maintenance costs, serious theft of lamps and cables, and energy waste.
The current pressures on urban public lighting systems are as follows: ①increasing personnel and facilities; ②increasing expenditures year by year; ③pressure of energy saving and emission reduction; ④more and more stringent service guarantee requirements. Among them, the "pressure of energy conservation and emission reduction" is the most prominent, and the specific manifestations are as follows: (1) Energy conservation goals in the 12th Five-Year Plan. By 2015, the national energy consumption per 10,000 yuan of GDP will be reduced by 16% compared to 2010 and 32% lower than in 2005; the energy-saving and emission-reduction targets will be rationally allocated to various regions; ②The lighting energy consumption is huge. Lighting accounts for 12% of electricity consumption in our country, and road lighting accounts for 30% of it; ③The lack of electricity is becoming more and more serious. Every city has more or less power shortages, and large-scale power cuts have become the norm during peak power periods.
2 wisdom lighting control system
2.1 Platform construction plan
2.1.1 Lighting Intelligent Monitoring System
The urban lighting intelligent control and management system consists of a monitoring center, a centralized controller, a single lamp controller and a cable monitoring alarm. The centralized controller is installed in the power distribution cabinet and communicates with the monitoring center through the GPRS wireless network, and the monitoring terminal is installed in the lighting terminal. Communicate with the centralized controller by means of power carrier communication. The centralized controller accepts, executes, and forwards the commands of the monitoring center, and controls the switch and brightness of each lamp through the monitoring terminal to achieve flexible remote control. At the same time, the centralized controller can monitor the circuit of each street lamp through the built-in output port, and monitor the real-time status of each lamp through the monitoring terminal. It can also use the analog and digital input ports to monitor the on-site lighting, power consumption and other information Feedback to the monitoring center to realize the scientific management of urban lighting facilities.
System working principle diagram
City Smart Lighting Monitoring Center
Schematic diagram of urban smart lighting
Urban lighting intelligent management and control system—computer login interface
Screenshot of urban smart lighting monitoring software system
2.1.2 Single lamp energy saving management system
The single lamp controller communicates with the intelligent monitoring terminal through the power carrier communication technology to realize the monitoring and control of each lamp, without wiring, easy to install, and realize:
1. Data collection: power consumption, voltage, current, power.
2. Single lamp control: single lamp timing switch, brightness adjustment.
3. Time period control: time period control can be performed as needed.
4. Fault detection: real-time detection of the operating status of a single lamp.
Single light controller is installed at the lower end of the light pole
2.1.2.1 Energy-saving planning scheme
The staff of our company conducted illuminance inspections on the street lights of various roads in September. After statistical analysis, it was found that most of the roads had excessive lighting. In response to this situation, our company carried out energy-saving plans for road lighting.
Lighting mode after renovation
Cross lights, turn on the main lights and turn off the auxiliary lights.
2.1.2.2 Single lamp control energy saving
Based on intelligent lighting control and management, the system provides precise control schemes for light on/off time, assists users in formulating light on/off plans for time-sharing, zone, season, and road segment. It uses a single-lamp controller as the terminal management method to provide The lamp energy-saving control scheme can achieve more than 30% energy saving, and can effectively reduce the lighting time and extend the life of the lamp.
² Single lamp control scheme
With the help of a single lamp controller, the system can monitor each lamp. The system can set a reasonable switch lamp scheme according to environmental conditions such as people flow, traffic flow, and weather, and perform single lamp energy-saving control under the premise of ensuring lighting.
² Manual single lamp control
Manual control can realize flexible and simple control of single or multiple street lights on a road.
2.1.2.3 Single lamp management energy saving
Through the application of lighting single lamp energy-saving management system, the management of urban lighting facilities is specific to each lamp, and the manager of urban lighting can check the working status, current, voltage, fault and other information of each lamp without leaving home. Real-time "online inspection" has changed the way that street lamp maintenance mainly relied on manual inspections and hotline repairs to find faults, saving a lot of office, vehicle, personnel and other costs and energy consumption, reducing overall operation and maintenance costs, and achieving energy saving and consumption reduction purpose.
² Single lamp alarm
Through the single lamp controller, the system can obtain the operating parameters of each lamp such as voltage, current, power factor, etc., combined with the alarm judgment limit set by the system, can determine whether the lamp is abnormal, and further determine the specific type of abnormality. Common alarm types are: lamp damage, lamp flashing, capacitor failure, etc.
² Single lamp failure report
Analyze and summarize the operation of a single lamp every night, generate a single lamp failure report, and feed it back to the maintenance department for troubleshooting. The system can query, count, and print by day, month, year or immediate needs.
Process diagram
Single lamp control and operation status query interface screenshot
Screenshot of single lamp status statistics interface
Screenshot of the meter reading interface
Screenshot of the statistics interface of electric energy meters
Screenshot of data collection interface
Screenshot of the voltage and current line graph interface
2.1.3 Centralized Controller
The centralized controller realizes the management and control of its control nodes through power line carrier communication, and realizes the communication with the monitoring center through GPRS wireless communication.
The centralized controller has built-in related software programs to form an intelligent control network on the power line to realize the management and control of the circuits and street lights.
The centralized controller can realize the following functions:
2.1.3.1 Remote control function
The system provides a variety of control methods, including independent control methods such as time control, light control, and manual control, as well as complex control methods such as mutual combination and special control.
- Time control
According to the local latitude and longitude coordinates, the annual sunrise and sunset times are calculated, and after adjustment, the annual light switching schedule is issued to the intelligent monitoring terminal to realize automatic light switching control.
- Light control
Realize on-demand light switch control according to illuminance.
- Manual control
Under special conditions, the switch light control of any loop can be realized through the manual control function of the system.
- Plan control
In order to meet the special requirements for lighting time in some special periods (holidays, major national events), the system provides a plan management function, which can set a set of switch lights for special periods, and will not affect the switch control of street lights at other times .
2.1.3.2 Telemetry function
The system obtains the operating parameter information of street lighting facilities through the telemetry function. The main parameters include: three-phase voltage, three-phase current, power factor, active power, reactive power, branch current, etc.
The monitoring center has a periodic automatic inspection mechanism. The system automatically conducts inspections according to the set time period. At the same time, the system also allows monitoring personnel to conduct manual inspections at any time.
2.1.3.3 Remote signaling function
The system can directly obtain the operating status of street lighting facilities through the remote signaling function. Once an abnormality is found in a certain state, the abnormal information will be sent to the monitoring center as soon as possible.
2.1.3.4 Remote adjustment function
The system can realize the management of the remote monitoring terminal through the remote adjustment function, and can adjust the working status and working parameters of the monitoring terminal to better monitor and manage the street lighting facilities.
2.1.3.5 Query statistical analysis function
System data is divided into two types: operating parameter data and statistical analysis data. The display methods of these two data are different. The operating parameter data is generally displayed in the form of data reports, while the statistical analysis data can be displayed using reports and graphs (curve Chart, bar chart, pie chart) and other methods.
2.1.3.6 Satellite automatic time calibration function (GPS)
The GPS equipment installed in the monitoring center collects satellite reference time and proofreading the server time to ensure the accuracy and consistency of all server clocks in the monitoring center. The monitoring center sends timing instructions to the intelligent monitoring terminal regularly to ensure the accuracy and consistency of the time between the monitoring center and the intelligent monitoring terminal.
2.1.3.7 Alarm management function
There are two sources of system alarm data: remote measurement data and remote signaling data. By analyzing remote measurement and remote signaling data, abnormal operation status of the equipment can be detected and alarm records can be generated. The generated alarm records will be permanently stored for query, statistics, and analysis; At the same time, the alarm information will be notified to the user in a variety of ways (text, sound, and information prompt window).
2.1.3.8 System Security Management
In order to regulate the operation of the system and enhance the safety of the system, the system adopts strict safety management measures.
The system defines a variety of user roles. Each role has its own independent operation authority and user interface. After logging in to the system, users can only complete various operations permitted by their authority.
All operations after the user logs in to the system must be recorded in a log and stored forever, so that when abnormal operations occur, the problem can be traced back and responsibilities are clearly defined.
In order to ensure the integrity and security of the business data, the data must be encrypted when storing and transmitting the business data.
2.1.4 Urban lighting mobile monitoring system
The urban lighting mobile monitoring system is a street lamp mobile management platform that integrates single lamp control, equipment operation monitoring, line detection, fault alarm, and personnel positioning based on the mobile phone operating system. The use of the system is not restricted by time, place, or space. It effectively solves the problems of emergency control when street light managers are not in the monitoring center, and equipment maintenance personnel can detect the repair of faulty street lights on the spot, which is helpful for rapid emergencies. Disposal to achieve "zero distance" emergency handling and command. The application of the system will make the urban lighting management work more convenient and faster, and the work efficiency of the inspection service team will be significantly improved. Mobile monitoring system diagram
Features
Remote control function: The mobile terminal can control any or all monitoring terminals to switch lights within the authority.
Telemetry function: The mobile terminal can detect current, voltage, power factor, power consumption, contactor status, short circuit, open circuit and other data, and send the detection results back to the monitoring center.
Remote signaling function: You can view the alarm information of the monitoring terminal or receive fault parameters through the mobile terminal
GIS geographic information: The mobile terminal can query location information, facility distribution, loop layout, and real-time operating data.
Single lamp control energy saving: The mobile terminal can control the implementation area, the road or a single lamp, and set a scientific lighting plan according to the traffic situation of the road or landscape to achieve energy saving.
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