1. Overview

Street lighting is an indispensable public facility in daily life. Currently, cities and towns are facing higher requirements for road lighting due to the shortage of electricity resources, energy conservation and emission reduction, urban renewal, and the construction of new cities. The management mode of urban road lighting was relatively crude and empirical, which differed from the construction concepts of smart cities and low-carbon cities. With the development of electronic technology, communication technology, and computer technology, intelligent street lighting management systems have become possible. By using this system, information on the operation process of each street lamp and surrounding environment can be collected, and a reasonable street lamp operation mode can be formulated to improve the management level of street lamps, reduce power consumption and management costs. The centralized controller is an important hub of the intelligent street lamp control system, installed on the low voltage side of the low voltage distribution transformer in the road light box transformer. It communicates bidirectionally with the street lamp management main station through GPRS and other communication methods to complete the monitoring and control of the street lamps. This product adopts an ARM core microcontroller and an independent embedded operating system, which is easy to operate and install, making it the best choice for intelligent street light control systems.

This concentrator mainly consists of nine parts: power unit, GPRS communication unit, multiple local communication and meter reading communication units, AC sampling unit, processor unit, carrier communication unit, LCD display, real-time clock and data storage unit.

As shown in Figure 1, specifically

2. Key Features

◇ Normal operating temperature:- 25 ° C to 70 ° C Maximum operating temperature:- 40°C～80c>
Relative humidity: 259% 6RH~950% 6RH
◇ Insulation resistance not less than 2MQ
◇ Insulation strength Insulation strength withstand 4kV/50Hz
◇ Impulse voltage
Capable of withstanding short-term impact of standard lightning wave with an amplitude of 6kV (1.2uS/30uS)
◇ Anti grounding fault capability
When exposed to 1.9 times the standard voltage for a long time, this device will not be damaged. After the power supply is restored, the equipment works normally.
◇ Anti electromagnetic interference capability
Complies with the requirements of GB/T17626 standard
◇ Electric energy
Complies with the requirements of GB/T17215 standard
◇ Power consumption
Static power consumption:< 4.5W

3. Reference standards

GB/T22264.1-2008 Installed digital display electrical measuring instruments Part l: Definitions and general requirements
Q/GDW 1374.2-2013 "Technical Specification for Power User Electricity Information Collection System Part 2: Technical Specification for Centralized Meter Reading Terminal" (State Grid Corporation of China)
Q/GDW 1374.3-2013 "Technical Specification for Power User Electricity Information Collection System Part 3: Technical Specification for Communication Unit" (State Grid Corporation of China)
Q/GDW 1375.2-2013 "Technical Specification for Inspection of Electric Power User Information Collection System Part 2: Concentrator Type Specification" (State Grid Corporation of China)
OfGDW 1379.3-2013 "Technical Specification for Inspection of Electricity User Information Collection System Part 3: Technical Specification for Inspection of Centralized Meter Reading Terminals" (State Grid Corporation of China)
Q/GDw 1379.4-2013 "Technical Specification for Inspection of Electric Power User Information Collection System Part 4: Technical Specification for Inspection of Communication Units" (State Grid Corporation of China)
Q/GDW 1379.4-2013 "Technical Specification for Inspection of Electric Power User Information Collection System Part 4: Technical Specification for Inspection of Communication Units" (State Grid Corporation of China)
Q/GDW 1379.4-2013 "Technical Specification for Inspection of Electric Power User Information Collection System Part 4: Technical Specification for Inspection of Communication Units" (State Grid Corporation of China)

4. Data transmission interface

5. Main functions of street lamp concentrator

Read the single lamp data from the terminal module for collection, storage, and preprocessing.
Convey the control instructions from the control center to the terminal module (single point, group, special scenario control, etc.).
According to the instructions from the control center, upload the processed technical parameters of the switch box and street lights for daily operation management and power assessment.
Analyze communication data from terminal modules, identify lighting faults, and alert the control center.
The system composed of the street lamp concentrator and each terminal creep module can maintain a constant power at each lighting point in the event of voltage fluctuations in the control box, ensuring uniform illumination at the beginning and end of the wire bag, and eliminating voltage overload at night. Thus achieving the goal of energy conservation and extending the service life of the light source.
Through the data exchange between the street lamp concentrator and the terminal energy-saving module, the system can control the lighting facilities in different time periods and areas. Through current limiting regulation. Up to 54% energy savings can be achieved in the second half of the night (at a constant voltage of 220 volts). The system can be automatically controlled according to pre-set settings, or manually controlled according to actual needs.
◇ Data storage function. When the street lamp concentrator operates independently, this design ensures that even in the event of communication line failures, data loss will not occur in the short term. Including electricity consumption information and single lamp fault information.
◇ Remote meter reading function, capable of automatically reading meter data according to various national grid regulations.
Automatically generate sunrise and sunset times based on the latitude and longitude information of the street lamp concentrator, and automatically adjust the on/off time of the street lamp every day.
◇ Four circuit control function: To turn on or off the street lamp, the entire circuit where the Lu lamp is located must be powered on or off through circuit control (even if a single lamp fails, it will not affect the normal operation of the street lamp). When the street lamp is working normally, data from single points, groups, special scenarios, etc. must be collected and controlled
◇ 3.5 The impulse voltage can withstand a short-term impulse of standard lightning waves with an amplitude of 6kV (1.2uS/30uS)