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Energy saving monitoring system of single lamp dimming for urban lighting

release time:2020-06-28publisher:


  Through the monitoring and dimming control of the single light source installed in the urban road, square, tunnel and lighting engineering, the fine management of urban lighting is realized, and the remarkable energy-saving effect is obtained.

  Urban road lighting is the main component of urban public lighting. Urban lighting management is directly related to the travel safety of citizens and the establishment of a good city image. Urban lighting management is an important part of urban public utilities management.

  In order to improve the situation of scattered urban lighting management and failure real-time feedback, many cities have invested a lot of money to install the lighting "three remote" monitoring system. However, this kind of system is only limited to the detection of emergencies and Emergency Scheduling and other simple functions, can not carry out fine fault statistics, can not give early warning to the system, and can not achieve people-oriented dimming control to achieve energy saving About.

  Awlc3000 is a fine management system based on single lamp control, which can obtain all kinds of valuable operation data of the system in a simple way. While providing the basis for the decision-making of the manager, the system automatically adjusts the output power of the light source according to the change of time in an active way, and detects the aged lamps, so as to put the aged lamps in safe operation mode Inform the user to replace the equipment before it fails.

  Awlc3000 single light dimming equipment has two types of driving HID light source and LED light source. At present, LED light source technology has made great progress. It is a very meaningful application of awlc3000 to integrate led into system and hid hybrid management.

1、 Current situation of energy saving technology for urban lighting

  At present, the utilization rate of electric energy of urban street lamp lighting is less than 65%, and the waste of electric energy is quite serious. It is estimated that in a city with 10000 street lamps, the electric energy consumed in street lamp lighting alone each year is more than 20 million kilowatt hours. However, due to the lack of advanced technology and scientific management, the electric energy wasted in street lamp lighting every year is more than 6 million kilowatt hours.

  For any city, street lighting system is undoubtedly an indispensable important infrastructure. When night falls, tens of thousands of street lights light up the streets of the city, from the traffic flow, the surging tide of people, to the night when people are quiet and quiet, the lights guard the night of the city. Now, the reasonable configuration and effective operation of urban lighting system has become an important symbol to measure the appearance and appearance of a city.

  It is worth noting that urban lighting system not only creates a livable environment for the city, but also consumes a lot of electric energy. According to statistics, urban street lighting accounts for about 30% of China's lighting consumption. The annual electricity consumption is about 85 billion kwh, equivalent to 30 million tons of standard coal. Based on China's average electricity price of 0.65 yuan / kWh, the annual expenditure of municipal street lighting alone is as high as 55.2 billion yuan.    However, due to technical reasons, street lighting can not be adjusted in real time according to grid fluctuation, illumination demand and lighting period. At present, the power utilization rate of urban street lighting is less than 65%, and the waste of electric energy is quite serious. It is estimated that a city with 10000 street lamps consumes more than 20 million kilowatt hours of electric energy per year only for street lighting, but due to the lack of advanced technology The technology and scientific management of street lighting waste up to 6 million kilowatt hours of electricity every year.

  Today, energy conservation and emission reduction has become an important national policy in China. In the design and operation of street lighting system, more consideration should be given to energy conservation and utilization. Scientific management and advanced technology are not only important contents of implementing national energy-saving policies, but also an effective way for local governments to reduce financial expenditure.

  As for the huge energy consumption of urban lighting, local governments and street lamp management departments attach great importance to it. How to reduce the power consumption and the cost of electricity has always been an important issue for relevant departments to think about and explore. However, due to the lack of advanced technology and scientific management, many places have taken some energy-saving measures, but the implementation effect is not ideal.

  Many local street light management departments have tried to reduce power consumption by "midnight lights", "separated lights" or "single side lights". These measures do not fully consider the actual lighting needs of modern cities, leaving great hidden dangers for public security management and night traffic safety, which is against the original intention of urban street lamp system planning and setting.

  In some places, led streetlights have been demonstrated on local roads, but the effect is not ideal. The existing problems mainly include: the cost of lamps is too high; the fog penetration is not enough; the LED light distribution curve is not reasonable, resulting in insufficient uniformity of road illumination, zebra effect; Sr value does not meet the standard requirements; light attenuation is large; service life is controversial and maintenance is difficult. In the "design standard of urban road lighting" of our country, the lamps used in road lighting are stipulated: "cut-off lamps or semi cut-off lamps must be used in Expressway and trunk road", "semi cut-off lamps shall be used in secondary trunk road". However, the current LED road lighting lamps do not meet the above requirements.

  There are also some places that have tried to implement local power-saving technology transformation (the technology adopted includes single lamp reactive compensation technology, chopper voltage regulation technology, fixed voltage reduction technology, transformer tap voltage regulation technology, etc.), but in general, these technologies do not fully consider the electrical characteristics of the lamp, or there are obvious defects in the technology itself, which often cause stroboscopic and arc extinction of the lamp . the service life is greatly shortened, or it obviously affects the reality of street lamps

Wireless network topology

2.2 some groups of monitoring center

  Awlc3000 monitoring center is composed of communication network, central server and platform support software.

2.2.1 communication network

  The communication network is composed of optical fiber, router and switch. The bandwidth of optical fiber should not be less than 8m, and the router should have firewall function.

  When users apply for optical fiber to network operators, they need to bind a static IP, and it is necessary to apply for a domain name and resolve to the static IP.

2.2.2 central server

  The central server is the key equipment to support the operation of the platform. It is recommended to install windows 2008 operating system and SQL 2005 database. The central server is required to be enterprise level with memory no less than 4G. The recommended brand and model are Lenovo Wanquan T260 G3 d5603.

2.2.3 communication management software

  The communication management software runs on the central server, connects with remote GPRS equipment through the Internet, and provides data service to the remote client, so that the remote client can exchange data with any GPRS monitoring terminal connected to the server through the Internet.

  Communication management software is the core support software of the system platform. If the software can not operate normally, it will cause the system can not access normally, but it will not affect the automatic operation of peripheral equipment.

2.2.4 data management software

  Data management software is used by administrators to input system information and register system users. Administrators can use the software to realize the following functions:

  ● Create and edit monitoring zones

  ● Add and delete monitoring equipment

  ● register, delete new users, set and change user login password

  The software supports parallel setup of multiple systems (one monitoring center supports multiple user systems at the same time), and it can also support hierarchical operation of systems (a user system is divided into multiple subsystems, and users can only see subsystems corresponding to other levels after logging in, which is used for hierarchical management of large systems).

2.2.5 map service software

  The GIS Engine of awlc3000 uses Baidu map, and the map service software is a service software that downloads java code to the map window of client users to obtain Baidu map data.

  Baidu map is a free network resource, which has the characteristics of exquisite map, clear landmark, detailed data, and satellite imaging data. Some economically developed cities have made 3D digital cities. The map service software can obtain the corresponding service port and provide GIS engine link for the client software.

2.2.6 client scheduling software

  Dispatching client software is the software for users to manage the system. It is installed in the remote (LAN or Internet). The client software is mainly divided into three functional parts. The first is the device tree window on the left side of the window. After the client logs in normally, it downloads system information from the server randomly to form the tree structure diagram of the system.

  The main window is the electronic map window, which displays the position and coordinates of the system equipment, and can switch between the satellite map model and the ordinary plane map.

Under the window of dispatching terminal is the status blue, which is used to display various operation information and alarm information of system equipment.

2.2.7 intelligent platform

  The intelligent * * * platform can be used as a simplified version of portable monitoring terminal, mainly for the convenience of maintenance personnel and on-site technical personnel to consult equipment information, emergency operation, etc.

2.3 composition of peripheral hardware

  Awlc3000 peripheral equipment refers to the equipment installed in all parts of the city to form the system communication, measurement and control.

2.3.1 lighting monitoring terminal

  Awlc3000 system adopts LXD series lighting monitoring terminal, recommended model: lxd3618. Its performance indexes are as follows:

  ● communication mode: GPRS (built-in communication module), supporting IP and domain name connection settings;

  ● communication interface: two channel RS485, speed 38400bps;

  ● switch control output: 6 channels;

  ● branch current acquisition: 12 channels (differential signal);

  ●  collection of three-phase voltage, current and power, and recording of accumulated electric quantity;

  ● the real-time clock error is less than 15s / day, and the power is cut off and maintained;

  ●  two way access control;

  ●  16 sets of switch task reservation, supporting sunrise and sunset control mode;

  ● 16 groups of dimming tasks are reserved, and the single lamp concentrator works together through 485 bus;

2.3.2 wireless single lamp concentrator

  ● air speed: 20kbps

  ● superior interface: RS485 / 19.2kbps (connected to monitoring host)

  ● wireless power: 10MW

  ● free band: 780mhz (China) / 868mhz (Europe)

  ● subnet node: maximum support 384 points

  ● auto scheduling: 8 auto tasks can be preset

  ● orientation identification: 8 directions

  ● clock synchronization: it is synchronized with the time service center server of Chinese Academy of Sciences once a day

  ● power input: DC12V

2.3.3 wireless single lamp information unit

  ● air speed: 20kbps

  ● wireless power: 10MW

  ● free band: 780mhz (China) / 868mhz (Europe)

  ● lower level interface: RS485 / 19.2kbps (connected to dimming equipment)

  ●Addressing capability: it can access 8 dimming modules at the same time

  ● power input: DC12V

2.3.4 dimming module of high pressure sodium lamp

  ● rated input voltage: AC220 ± 15%

  ● input current: 1.2A

  ● starting current: < 0.3A

  ● input power: 265w

  ● power factor: > 0.98 (input AC220V, full load)

    > 0.95 (input AC220V, half load)

  ● total current harmonic: < 10%

  ● current peak ratio: < 1.7

  ● input voltage frequency: 50-60Hz

  ● efficiency: > 94%

  ● dimming power window: 50% ~ 100%

  ● fault protection: lamp failure protection, lamp aging protection, short circuit protection, overheating protection, ignition failure protection

  ● communication interface: RS485

  ● baud rate: 9.6kbps

  ●Automatic dimming: 5 sections automatic

  ● operation mode: when networking, the central scheduling takes priority, and when there is no networking, it enters the automatic mode

    Instruction control: addressing mode and attribute mode

  ● ambient temperature: - 20 ° C ~ + 50 ° C

  ● environmental humidity: 98% condensation, or intermittent water immersion

2.3.5 networking dimming LED lamps

   lamp structure: tennis racket mesh heat dissipation hole

   light source structure: integrated light source (COB)

   rated input voltage: AC220 ± 15%

   input voltage frequency: 50-60Hz

   efficiency: > 94%

   dimming power window: 50% ~ 100%

   fault protection: lamp failure protection, lamp aging protection, short circuit protection, overheating protection, ignition failure protection

   communication interface: RS485

   baud rate: 9.6kbps

   Automatic dimming: 5 sections automatic

   operation mode: when networking, the central scheduling takes priority, and when there is no networking, it enters the automatic mode

  Instruction control: addressing mode and attribute mode

   lamp power: 80 ~ 180W

   single bead light source power: 40 ~ 60W

   color: warm white 2700 ~ 3200K, positive white 6000 ~ 6500k

3、 Awlc3000 core value

  People oriented, lighting on demand, fine management

3.1 people oriented

  People oriented lighting is to consider the lighting design in combination with the changes of people's behavior and surrounding environment. Awlc3000 dimming technology covers high-pressure sodium lamp and LED lighting, which can cover most of the current urban public lighting sources. Awlc3000 can achieve the most comfortable lighting effect by adjusting the output power of the light source, fully reflecting the "people-oriented" lighting concept.

3.2 on demand lighting

  "On demand lighting" is moderate lighting. The phenomenon of excessive lighting and huge waste of electric energy is common in urban roads, highways and tunnels in China. The energy consumption of excessive lighting is as high as 50% - 90%. Awlc3000 adjusts the output power of the light source according to the actual needs to achieve the goal of moderate lighting.

3.3 fine management

  The core work of urban lighting management is to manage lighting facilities to ensure their integrity. Lighting and light source management is the main content of lighting management. Awlc3000 can provide real-time and detailed single lamp information. Managers can quickly and comprehensively understand the lighting status information of the whole city without relying on manual inspection for statistics. Compared with the traditional management mode, fine management based on real-time single lamp data has incomparable efficiency advantages and ensures the integrity rate of facilities Meet the requirements.

4、 Awlc3000 system principle and key technology

  At present, in the field of energy conservation and monitoring of urban lighting in China, awlc3000 can bring the advantages of energy conservation and monitoring to the extreme, which is a relatively comprehensive package solution.

  Energy saving principle of frequency conversion dimming

  Take the high-pressure sodium lamp as an example, the traditional driving device of high-pressure sodium lamp has an inductive ballast and a trigger. When the high-pressure sodium lamp is ignited, the inductive ballast limits the voltage between the two electrodes of the sodium lamp between 90 ~ 110V. However, since the whole load circuit is connected to the 220 V mains power supply circuit, the inductive ballast as one of the loads needs to consume a certain amount of energy; at the same time, due to the use of inductance element, the inductive ballast can be used as one of the loads The power factor of the circuit is very low (usually less than 0.5), which will increase the current and increase the additional loss of the circuit. As a voltage sensitive light source, the actual output power of the high-voltage sodium lamp is greatly affected by the voltage fluctuation. In the latter half of the night, due to the light power load of the society,

5、 Product photos