Oct 13, 2014 - Besides, it send the record to school data center .... school(send warning messages according to the balance and send ... Mass email record.
www.suntrans.net
IoT Based DSM System on Campus Dr . Guilin Zheng Prof. of Wuhan University IEEE Wuhan Section Chair Chair of Guangzhou Suntrans Measurement & Control System Co., Ltd
October, 2014
CONTENT System introduction
1
Implementation scheme 2 Web soft realization
3
Client App realization
4
Application prospect
5
System introduction The system achieves real time electricity consumption monitoring，unsafe load identification and automatic “dangerous load shedding”. Besides，it realizes automatic cut off when users are in arrearage and automatic power supply after paying the fees. Meanwhile, the system is designed to prevent each dormitory’s power load to be less than the configured given threshold. It guarantees the safety of the whole building by keeping them away from fire due to electric overload. Guangzhou Suntrans Measurement & Control System Co., Ltd has been devoting to research on intelligent electricity management system based on IoT since 2000. The present products including smart switch, smart ammeter, smart network data acquiring unit, energy management system software. The serial of products solve the problem of electricity management on school dormitories. It has the advantages of energy saving, smart control, non-technological electricity loss reduction and raises the management level of school on electricity utilization.
System introduction The three step development strategy:
（1）Hardware equipment installation Install the smart ammeters, smart switches, the serial interface server and data acquiring unit
（2）Management software design Put the intelligent electricity management software based on database and IoT into use after finishing configuration with public database interface of school and the cloud side database construction.
（3）Software and hardware debugging Put the software such as electricity management software and communication network and hardware such as Smart switch, smart ammeters, the serial interface server and data acquiring unit together for testing.
CONTENT System introduction
1
Implementation scheme 2 Web soft realization
3
Client App realization
4
Application prospect
5
Implementation scheme This series of products based on IoT platform for intelligent electricity management is self -developed by Suntrans. The overall design is shown in the next page. The key unit of the system is the smart switch. It achieves the propose of electricity load control and management by cooperating with the serial interface server , data acquiring unit and the smart ammeter which is able to identify the load.
Information center of school
Overall structure
Implementation scheme Smart Remote Load Controllers （SRLC）are selected as a core control terminal device and are used for constructing distributed electrical system. They are a typical MPU embedded smart terminal device which are designed based on the patent technology of the AC zero-crossing and have an electric power input interface and multi remote controllable electric output. The main related products include three-phase smart remote load controller (ST-SRC), three-phase smart motor controller (ST-SMC), one-phase four channel smart remote load controller (ST-SRLC-4) and one-phase ten channel intelligent load controller (ST-SRLC-10).
Key technology and product
One-phase 10 Channel Smart Remote Load Controller （ST-SRLC-10）
The characteristics of ST series products which have integrated TCP/IP protocol are no arc, long life, lower power consumption and cost. They support multi-communication mode, such as RS485, CAN, Zigbee, Wi-Fi etc., and can complete the time of a load protection action within only 20ms so that electrical accidents and fire hazards could be prevented effectively.
Implementation scheme produ Key technology and
ct
Single phase smart meter (ST-DDSD5)
Three-phase four-wire smart meter (ST-DTSD-102)
The ST series smart meters are designed based on the advanced kilowatt-hour metering IC, DSP and SMT technologies for realizing real-time, accurate and quick measurement of electric parameters. They are characteristic of long-life ,high reliability, and strong safety. They have a good performance of accurate measuring real-time voltage, current effective value and power factor etc.. They support multi-communication mode, such as RS485, CAN, Zigbee etc., and they have programmable and remote- configurable faction which complete the time of a “load identification” within only 60s.. Besides, they are equipped with LCD display and inner temperature controller.
Implementation scheme Hardware installation
Data acquiring system collects data from ammeters, smart switches and serial interface server. The system communicate with remote server by RJ-45 or GPRS. It also have the function of data storage and data backup. Sketch map of data acquiring system
Implementation scheme Hardware installation
Sketch map of intelligent load management system
The intelligent load management system designed for dormitories realizes load monitoring and online management. The key control unit is ST-SRLC-10. It communicate with the server by RS485-RJ45 switch. With the help of the server software，the system realizes real-time online electricity management.
Implementation scheme Hardware installation
The electrical connect graph of smart meter and smart switch
Implementation scheme Software realization
safety certification system User layer UI layer
Take the electricity management system for student dormitory in Wuhan University for example. The overall design of the system is made of six part: UI layer, control layer, business rule layer, data center, data communication layer and data access layer.
Control layer Business layer
Data center
Data query & communication layer
Structure of the system software
Implementation scheme
The system satisfies all the requirements for the present dormitory management. The design conforms with the regulations of MVC which separate model, view and controller. Besides, it not only suitable for student dormitory，but also suitable for faculty dormitory and school public electricity. The well-designed user interface, business configuration implementation and database management make the system flexible, convenient and administrable.
The topology of the system network
Implementation scheme Software and hardware debugging
The placement of electric control cabinets
The front view of electric control cabinet
Implementation scheme Software and hardware debugging
air-condition cabinet
Lighting distribution cabinet
The view of electric control cabinet
The inner structure of electric control cabinet
Implementation scheme SRLC-10
Software and hardware debugging
SRLC-10 in working condition
Single phase smart meter
Single phase smart meter in working condition
Three phase smart meter in working condition
Implementation scheme Software and hardware debugging
The staff on-site debugging
CONTENT System introduction
1
Implementation scheme 2 Web soft realization
3
Client App realization
4
Application prospect
5
Technical indicators num
content
1 Each room has two meters separately measuring lighting &socket electricity consumption and air-condition electricity consumption. 2 Power supply is remote controllable for each room. 3 The management software has interface with school public database, campus card system and short message platform provided by school. 4 The management software stores the data of power consumption , power factor and expenses situation every 10 minutes. 5
The system sends insufficient balance warning, cuts off /recovers power supply according to expenses and electricity consumption situation.
6
The software adopts the pattern of multi-level authorization management. The center administrator authorizes each building administrator to recover power supply for each room.
7 8 9 10 11 12
Users can pay charge and query for balance and power consumption information through the Internet. Be able to response to query for power consumption history curve and history overload event. The number of users must be above 20,000. Besides, the target can be extended to 200,000。 The system must be able to recovery data when the Internet or electricity is turned off. High-power resistive loads identification and power supply limitation. Automatic cut off when overload and recovery of power supply after 3 minutes.
13 The system disables after 4 times continuous cut off. The power supply will not recover until the administration unlock the system. 14 Automatic power supply cut off when overload or using resistive load of 100W- 300W. 15 Automatically take the power subsidy into account. 16 The system can be put into use or suspended at regular time. 17 The system is able to settle accounts when students check out or change rooms.
Web soft realization The intelligent electricity management system has been applied in Wuhan University. It will act as an electricity “big data” system and collect a large amount of parameters data from the student’s dormitories, such as voltage, current, power, power factor, electricity consumption, switch state, payment records, deduction records and so on.
Log in
The login interface
Web soft realization System function-Electricity management and remote control Each room has two meters separately measuring lighting and socket electricity consumption and air-condition electricity consumption. Power supply is remote controllable for each room. The system sends insufficient balance warning, cuts off /recovers power supply according to expenses and electricity consumption situation. Besides, it send the record to school data center and accept the load control command from the central server. The management software stores the data of power consumption , power factor and expenses situation every 10 minutes, which makes it possible for responding to students query for information of those information through Campus Network. Support history data statistics, query and analysis.
Web soft realization System function-Electricity management and remote control
Integrated management interface- Dormitory management center
Related explain 1. Function list 2. Search criteria 3. Student number 4. Meter type 5. Lighting & socket electricity 6. Total number of rows 7. Query 8. Refresh webpage 9. Order 10. Area 11. Building number 12. Unit number 13. Room number 14. Administrator of the dormitory 15. Meter type 16. Remaining of electricity use 17. Remaining of subsidy electricity use 18. Account balance 19. Present status 20. Meter status (green-ON; red-OFF) 21. View
Web soft realization System function-Electricity management and remote control
The management and control interface : lighting & socket Dormitory management center
Related explain 1. Function list 2. Electricity consumption status 3. Area 4. Building 5. Unit 6. Room number 7. Meter type： lighting &socket 8. Current 9. Voltage 10. Power 11. Power factor 12. smart meterreading 13. Expense status 14. Account balance 15. Remaining of subsidy electricity use 16. The number of students in one room 17. Switch status 18. Batch processing option
Web soft realization System function-Electricity management and remote control
The management interface : air-condition
Related explain 1. Function list 2. Electricity consumption status 3. Area 4. Building 5. Unit 6. Room number 7. Meter type： air-condition 8. Current 9. Voltage 10. Power 11. Power factor 12. smart meter reading 13. Expense status 14. Account balance 15. Remaining of subsidy electricity use 16. The number of students in one room 17. Switch status 18. Batch processing option
Web soft realization System function-Electricity management and remote control
The electricity consumption historical data of dormitory
Related explain: 1. Function list 2. Electricity consumption history data 3. Area 4. Building 5. Unit 6. Room number 7. Meter type： air-condition or lighting &socket 8. Current 9. Voltage 10. Power 11. Power factor 12. smart meterreading 13. Expense status 14. Account balance 15. Remaining of subsidy electricity use 16. The number of students in one room 17. Switch status 18. Batch processing option
Web soft realization System function-Electricity management and remote control Related explain 1.Function list 2.Electricity consumption history data 3. Area 4. Building 5. Unit 6. Floor 7. Room number 8. Query time 9. Meter type： lighting and socket 10. Parameter： electricity consumption
Electricity consumption curve for single room on Oct.13,2014
Web soft realization System function-Electricity management and remote control Related explain 1.Function list 2.Electricity consumption history data 3. Area 4. Building 5. Unit 6. Floor 7. Room number 8. Query time 9. Meter type： lighting and socket 10. Parameter：current
The current curve of one room on Oct.13,2014
Web soft realization System function-Electricity management and remote control Related explain 1.Function list 2.Electricity consumption history data 3. Area 4. Building 5. Unit 6. Floor 7. Room number 8. Query time 9. Meter type： lighting and socket 10. Parameter：voltage
The voltage curve of one room on Oct.13,2014
Web soft realization System function-Electricity management and remote control
Related explain 1.Function list 2.Electricity consumption history data 3. Area 4. Building 5. Unit 6. Floor 7. Room number 8. Query time 9. Meter type： lighting and socket 10. Parameter：power
The power factor curve of one room on Oct.13,2014
Web soft realization System function-Electricity management and remote control
Related explain 1.Function list 2.Electricity consumption history data 3. Area 4. Building 5. Unit 6. Floor 7. Room number 8. Query time 9. Meter type： lighting and socket 10. Parameter：power factor
The power factor curve of one room on Oct.13,2014
Web soft realization The limitation of high-power electricity load The system must be able to recovery data when the Internet or electricity is turned off. Automatic cut off when overload and recovery of power supply after 3 minutes. The system disables after 4 times continuous cut off. The power supply will not recover until the administration unlock the system. Automatic power supply cut off when overload or using resistive load of 100W- 300W.
Web soft realization The limitation of high-power electricity load
Related explain 1. Function list 2. Load power limitation 3. Order 4. Area 5. Building number 6. Unit number 7. Meter type 8. Initially limited power 9. Edit
The power of electrical appliances setting
Web soft realization The limitation of high-power electricity load Related explain 1. Function list 2. Overload log 3. Inquiry 4. Order 5. Record time 6. Area: : Information Engineering District 7. Building number 8. Unit number 9. Room number 10. Meter type: lighting & socket electricity or air conditioning 11. Content
The overload record
Web soft realization The unsafe load identification Related explain 1. function list 2. unsafe load log 3. inquiry 4. order 5. record time 6. area : Information Engineering District 7. building number 8. unit number 9. room number 10. meter type: lighting and socket 11. content
The record of power off owing to use unsafe load
Web soft realization The unsafe load identification The system realize “unsafe load” identification function through a variety of
electrical
parameters measured by smart electric meter and then implement power-off control for “unsafe load“. Managing and controlling high-power load and unsafe load can be completed intelligently （unsafe load： resistive load （such as Electro thermal cup ,egg boilers , Electric blanket and Electric kettle,etc）, Mixed Load with reactive power compensation （such as Fans, small washing machine, large battery equipment, large rechargeable batteries and motors more than 100W,etc） load which power greater than or equal 60W （ adjustable ） The system can be designed to automatically restore power three times in an hour after power off owing to unsafe load . The fourth to restore power requires students to apply and submit a report and manager restore power by hand through software or switch placed in electric control cabinet . Thus management efficiency is improved and electrical safety is guarantee.
Web soft realization The unsafe load identification
Electro thermal cup
Electric blanket
Electric kettle
Web soft realization Authorization management
Management software has function of graded authorization. Center administrators can authorize to each administrator of a building. The administrator of a building is the directly manager of the dormitory electricity information. They are responsible for power management and dormitory management. Students can query electricity information and control electrical equipment of their dormitory through computers or mobile phones and other smart devices.
Web soft realization Authorization management Related explain 1. Function list 2. Authorization management 3. Adjunction 4. Deletion 5. Order 6. Role 7. Creator 8. Outline 9. Edit 10. Deletion The assignment of management role
Web soft realization Authorization management
Related explain 1. Function list 2. Role 3. Function configuration area 4. Role modification 5. Function available
Management role and graded authorization rights assignment
Web soft realization Recharge and deduction Users can recharge, query the balance and electricity information through computer or mobile phone. The system has the function of subsidized lighting electricity consumption. It can display all personnel information of a room and automatically add subsidized electricity to the corresponding account according to the number of staff and subsidy standards. Subsidized electricity and purchased electricity will be calculated separately.
Management software exchange information with the school public databases(share students accommodation information) ,campus card system(recharge and purchase electricity) and messaging platform provided by the school(send warning messages according to the balance and send notification messages after recharge).
Web soft realization Recharge and deduction Related explain: 1. Function list 2. Basic information about electricity consumption 3. Area 4. Building 5. Unit 6. Room number 7. Account administrator 8. Student number 9. Electricity for aircondition available 10. Account balance of air-condition 11. Remaining electricity use for lighting @ socket 12. Subsidy electricity use 13. Recharge electricity use 14. Account balance of lighting & socket 15. Sum of balance 16. recharge
The basic information of electricity usage-student interface
Web soft realization Recharge and deduction
Related explain 1. Function list 2. Recharge record 3. Query 4. Data export 5. Order 6. Recharge time 7. Meter type 8. User 9. Recharge amount
Student interface-recharge record
Web soft realization Recharge and deduction
Related explain 1. Function list 2. Meter type 3. Query 4. Data export 5. The time of take cost 6. Fee deduction time 7. Fee deduction amount 8. Power consumption 9. Account balance
Student interface-deduction record（Air conditioning）
Web soft realization Recharge and deduction Related explain 1. Function list 2. Expense record 3. Query 4. Data export 5. The time of take cost 6. Meter type 7. Fee deduction amount 8. Power consumption 9. Account balance
Student interface-deduction record（lighting & socket electricity）
Web soft realization Specific function setting Related explain 1. Function list 2. Order 3. Area 4. Building 5. Unit 6. Room number 7. Student number 8. Student name 9. Account administrator 10. Batch processing option
Mass email record
Web soft realization Related explain 1. Function list 2. Switch operation at regular time
Specific function setting
3. Electricity consumption for lighting and socket 4. Power supply time 5. Cut off time 6. Confirm 7. Add 8. Delete 9. Holiday 10. Air-condition 11. Season 12. Spring 13. Starting time 14. Ending time 15. Edit 16. Delete
The time setting for power turned on and turned off
Web soft realization Related explain
Specific function setting
1. Function list 2. Account frozen & thaw 3. Query 4. Account frozen 5. Account thaw 6. Order 7. Area 8. Building 9. Unit 10. Room number 11. air-condition state 12. Remaining of electricity use for lighting 13. Account status 14. Account frozen/thaw 15. Batch processing option
The freeze or thaw of account when change room and check out
Web soft realization Log management
Related explain 1. Function list 2. Operation log of central administrator 3. Query 4. Order 5. Operation time 6. IP address 7. operator 8. content The operation log of center administrator
Web soft realization Log management Related explain 1. Function list 2. Switch operation log 3. Query 4. Order 5. Record time 6. Area 7. Building 8. Unit 9. Room number 10. Operator 11. Meter type 12. Content
Operation (power turn off and on) by soft log
Web soft realization Log management Related explain 1. Function list 2. Diary of cut off when the money is not sufficient 3. Order 4. Record time 5. Area 6. Building 7. Unit 8. Room number 9. Meter type 10. Content The log of power turned off
Web soft realization Log management
Related explain 1. Function list 2. Login diary 3. Order 4. Login time 5. Login account 6. Login IP 7. Login result
The login log of system
Web soft realization Log management Related explain 1. Function list 2. Check out/change room record 3. Order 4. Record time 5. Student number 6. Name 7. Type 8. Previous area 9. Previous building 10. Previous room number 11. Present area 12. Present building 13. Present room number
The log of change room and check out
Web soft realization Data statistics and data query Related explain 1. Function list 2. Electricity consumption and expense statics 3. Order 4. Area 5. Building 6. Unit 7. Date 8. Equipment type 9. Meter type 10. Power consumption 11. Expense A dormitory building electricity consumption and cost statistics
Web soft realization Data statistics and data query Related explain 1. Function list 2. Loss statistics contrast 3. Area 4. Building 5. Unit 6. Date 7. Equipment type 8. Meter type 9. Electricity consumption Single-phase smart meter
Three-phase smart meter
Three-phase and single-phase smart meter electricity consumption statistics of a building， Loss Statistics Online
Web soft realization Three-phase smart meter monitoring Related explain 1. Function list 2. Electricity status of three phase meter 3. Rime 4. Area 5. Building 6. Unit 7. Meter type 8. Voltage of phase a 9. Voltage of phase b 10. Voltage of phase c 11. Current of phase a 12. Current of phase b 13. Current of phase c 14. Active power 15. Reactive power 16. Electricity consumption -day 17. sum of electricity consumption
The state parameters of three-phase smart meter
Web soft realization Three-phase smart meter monitoring Related explain 1. Function list 2. Electricity consumption history data of three phase meter 3. Rime 4. Area 5. Building 6. Unit 7. Meter type： air-condition 8. Electricity consumption on current month 9. Meter reading at the end of each month The historical data of three-phase smart meter
Web soft realization Three-phase smart meter monitoring
Related explain 1. Function list 2. Area 3. Building 4. Unit 5. Meter type：lighting & socket or air-condition 6. Rime 7. Query 8. Restore display
Three-phase smart meterhistorical data curve
Web soft realization Three-phase smart meter monitoring
Related explain 1. Function list 2. Area 3. Building 4. Unit 5. Meter type： hot water 6. Time 7. Query 8. Restore display
Three-phase smart meterhistorical data curve-hot water
Web soft realization Three-phase smart meter monitoring Related explain 1. Function list 2. Electricity consumption history data 3. Order 4. Area 5. Building 6. Unit 7. Meter type： air-condition 8. Time 9. Current of phase a 10. Current of phase b 11. Current of phase c 12. Voltage of phase a 13. Voltage of phase b 14. Voltage of phase c 15. Active power 16. Reactive power Three-phase electricity meter historical data of electricity use
CONTENT System introduction
1
Implementation scheme 2 Web soft realization
3
Client App realization
4
Application prospect
5
Client App realization App function introduction The development of the App is based on the two operating systems-Android and iOS. The functions and interfaces are the same when running on the two operating systems. Here are the functions: 1. Users can log in the system to gain authority. 2. Users can inquiry the student information, the dorm information, the account information, the electrical parameter and the electricity state. 3. Users can inquiry the historical data and the historical graphs of the electricity, the electricity bills and the status logs. 4. Users can control the switches. 5. Users can modify their password and phone number. 6. Users can recharge for account. 7. Users can find a room or student in dormitory quickly through search.
Client App realization
The page of login-it can remember the username and password and can login automatically.
Login page
Client App realization The main page for administrators. The administrators can inquiry the electricity state of the dorms, control the switches, and inquiry the information of students.
The electricity state of dorms. page
The students info. page
Client App realization
The page of dorm-users can inquiry account info, electricity state, electrical parameter, dorm details and the members information.
Dorms' comprehensive information-lighting and sockets
Dorms' comprehensive information-air condition
Client App realization
The page of student information. The users can inquiry the student ID, faculty, major phone number, dorm detail and other members' info.
The detailed student information
Client App realization The page for historical data and curve of electricity consumption-users can check the historical data and curve of electricity consumption, voltage, current, power and power factor in last 24 hours, 7 days or 30days.
The historical data and curve of electricity consumption
The historical data and curve of current
Client App realization
The page for Electricity Billsit includes records of spending and recharge, in which users can view data for selected month. Users can also click the recharge button to jump to recharge website.
The page of electricity bills
Client App realization
The page of dorms‘ electricity status-both the records of operating and interruption. The interruption records can be divided into three parts: insufficient balance, unsafe load and overload. Users can choose the year and month as they want.
The page of dorms' electricity status logs
Client App realization
The page of searching -administrators can find a dorm or student quickly though searching by the student ID, student name or room number.
The page of searching
The page of searching
Client App realization
The setting page: The users can modifying login password and telephone number, check version, log out or exit application
The Settings Page For Application
The About Page For Application
Client App realization
The modification of password and related information
The modifying password page
The modifying tel. page
CONTENT System introduction
1
Implementation scheme 2 Web soft realization
3
Client App realization
4
Application prospect
5
Application prospect (1) Data acquisition Allow online dynamic monitoring of electrical parameters, such as voltage, current, power, power
Application Advantages
factor and so on, as well as identifying different types of real time loads in order to make intelligent decisions to optimize electrical power production and consumption. (2) Data processing Allow fast and intelligent load protection by analyzing and processing the collected data. For example, the situation of over voltage, under voltage, over-current and shortage of the three phase (3) Electricity control Allow remote sensing, measuring and control of the process of electricity flow by Smart remote load controller (SRLC). (4) Communication network Allow communication by combining all kinds of networks possibly present between vastly distributed smart load controllers, meters and the “cloud” management center. (5) Load analysis and identification Allow accurate analysis and identification of different real time loads, enhance intelligent energy saving and power coordination in order to make better use of electricity by accurate use of forecast model and provide scientific decision on a basis for power management departments.
Application prospect The system was based on Smart Remote Load Controller（SRLC）and smart meters which
Promotion
achieved real-time online monitoring, control and remote management of dynamic load. The system lets either managers or students to be able to take care of the matters relative to electricity by smartphones, IPad or any kind of terminal through the usage of campus Intranet or WLAN of Wuhan University. A student is authorized to be able to monitor information of electric system in ones dormitory, as well as the administrative manager of the building which could also monitor and control all the room facilities in the relative authorized buildings. This system was a breakthrough which achieved a transparent IoT system in managing electricity supply to the buildings and easily let students play a role in monitoring their power consumption process and pay bill by the usage of their smart phones. Not only the application and popularization of the technology could provide a more convenient, transparent and remote controllable electricity system but also it could effectively improve power management technology in order to improve energy efficiency and energy management. The application of the IoT system will reduce 98% of each building’s employee workload, as well as enhances the electrical supply safety and intelligent management level of student dormitory buildings.
Guangzhou Suntrans Measurement & Control System Co., Ltd
www.suntrans.net
