SMART ENERGY METER DCU
DCU(Concentrator) is the key equipment in the low voltage power line carrier electric energy meter reading system. The downlink channel has a low voltage power line carrier and RS485 serial communication channel. It can copy automatically by the carrier channel and store all kinds of the carrier communication function of intelligent instrument, data acquisition module, and other various carrier equipment power, and can through the RS485 channel 485 electric energy meter data acquisition outside; Also can pass the uplink channel data interaction with host or handheld devices, its uplink channel uses a public network, support the client and server two communication modes, and uses the modular design, it can directly change the communication mode by replacing the communication module.
It is in accordance with the relevant standards of IEC, the communication agreement between the main station and concentrator of the state grid power information acquisition system, and the relevant technical conditions and type specifications of the state grid.
1.Event recording data
Electric energy meter data collection:The terminal can collect the corresponding data items of the specified meter in real time.
2.Data management and storage
Event recording data：Event recording data recorded by concentrators and electric energy meters.
Automatic supplementary reading, the concentrator should have automatic supplementary reading function to the electric energy meter that has not read the data within the specified time.
The data of the electric energy meter is collected automatically according to the electric energy meter reading scheme set by the main station.
Real-time and current data:Generate and store real-time and current data.
Historical daily date:The data collected by the terminal will form various historical date data at the end of the day (at midnight of the next day) and keep the data of the last 62 days.
Historical monthly data:The data collected by the terminal will generate various historical monthly data at the end of the month (at the end of the month (at the end of the month (on the first day of the month) and keep the monthly data of the last 12 months.
Search the electric energy meters:Support the function of searching electric energy meters.
Report the electric energy meter incident:Terminal monitor the operation condition of electric energy meter, electric energy meter open cover records, electric energy meter terminal block open cover records, electric energy meter tripping events, electric energy meter closing, electric energy meter reset events, etc., according to the requirements of the event log and abnormal data recorded in time.
3.Parameter Settings and queries
Current time reading and synchronization time:The terminal shall be able to receive the clock call and timing commands of the master station or local handheld device. The timing error shall not exceed 5s. The running time error of the terminal clock within 24 hours is less than 0.5 s. After the power is out of power, the clock keeps working normally. The local channel can broadcast the time to the electric energy meter in the system.
Terminal parameter Settings and queries: The terminal can be set and query terminal file, communication address, terminal configuration and configuration parameters, communication parameters, and so on by the main station and handheld device.
4.The data transfer
Communication with the main station:
1.According to the requirements of the command of the main station, the terminal regularly or randomly sends to the main station all kinds of information such as power collected and stored by the terminal, maximum demand, power indication, and state quantity, etc.
2.The communication protocol with the main station conforms to Q/GDW 1376.1-2013 communication protocol of power user electricity information acquisition system: communication protocol between the main station and the acquisition terminal.
3.The terminal has flow control measures.
Communicate with the electric energy meter: The terminal communicates with the electric energy meter and copies and stores the data of the electric energy meter according to the set copying interval. The data forwarding command of the main station can be accepted, and the data of the electric energy meter can be transmitted directly to the main station through the remote channel.
Local status indication: With power supply, working status, communication status, and other indicators.
User data interface: The terminal has a local maintenance interface, which can be used for terminal parameter settings, software upgrading, etc. The local user interface can provide the user data service function.
Self - check, abnormal record: The terminal can automatically carry out self-inspection and find the abnormal equipment should have the function of event recording and alarm.
Terminal initialization: After receiving the initialization command issued by the main station, the terminal initializes the hardware, parameter area, and data area respectively. The parameter area is set as the default value and the data area is reset.
The remote upgrade:
1.Software upgrade: terminal software can be upgraded online through remote communication channels.
2.Breakpoint continuation: when the terminal downloads remote software, the terminal software has a breakpoint continuation capability.
3. Terminal version information: the terminal can query terminal version information by local display or remote call testing.
4.Traffic statistics: the terminal can count the communication traffic with the main station.
Module information: The terminal can read and store the wireless public network communication module model, version, ICCID, signal strength, and other information.
The terminal can read and store local communication module supplier, model, and software version information
7.Grounding resistance capability
The power of the concentrator by the effective earthing system or of a three-phase four-wire distribution network-neutral point grounding system power supply, 10% in ground fault and relatively overvoltage, under the condition of no grounding of two relatively voltage will be 1.9 times of the nominal voltage; In this case, the concentrator will not be damaged. After the power supply returns to normal, the concentrator will work normally and the data will not be changed.