Detailed explanation of
distribution network automation terminal DTU The distribution automation terminal DTU has a flexible configuration configuration function, a WEB publishing function, and an independent protection plug-in function. It is a new type of distribution network automation terminal integrating DTU, line protection and communication equipment management. The functional modules of
DTU power distribution terminal can monitor 10~35KV line voltage, line current, zero sequence current, equipment status and other operation and fault information in real time, and can complete remote signaling, remote measurement, and remote control functions to realize real-time monitoring of distribution network automation. The protection function of the power distribution terminal DTU can realize the function of detecting and removing line faults on the spot.
The distribution network automation terminal DTU also adopts a distributed design mode, with powerful software and hardware configuration configuration functions, which not only meets the real-time requirements of DTU, but also realizes the data storage and recording function, and at the same time realizes the independent configuration function of line microcomputer protection. Successfully solved the problem of coexistence of measurement and control, protection, and communication compatibility.
Main functions
1. Collect line fault information and complete fault identification.
2. Execute remote control commands to realize the function of fault isolation and power restoration.
3. Realize the measurement of the voltage, current, active power, reactive power, power factor, frequency or harmonic value of multiple lines, collect the direct current and transmit it to the higher-level device.
4. Receive and execute the remote control commands from the superior device and send back for verification.
5. Receive and execute time synchronization commands.
6. With the functions of program self-recovery and equipment self-diagnosis.
7. With channel monitoring function.
8. It can be connected to multiple power sources, and can be automatically and seamlessly switched on when the main power source loses power.
9. It can communicate with other systems in the substation for information exchange.
10. It has the function of receiving and executing reset commands.
11. With the intelligent maintenance function of the battery.
12. It has the function of communicating with two or more master stations.
13. Support multiple communication methods such as telephone dial-up, wireless, optical fiber, Ethernet, RS232/485, etc.
14. Rich communication protocols, supporting all currently popular protocols (such as 101, 104, CDT, MODBUS).
The distribution network automation terminal DTU is generally installed in conventional switching stations (stations), outdoor small switching stations, ring network cabinets, small substations, box-type substations, etc., to complete the position signal, voltage, current, and active power of the switchgear , Reactive power, power factor, electrical energy and other data acquisition and calculation, the switch is opened and closed, to realize the fault identification and isolation of the feeder switch and the restoration of power supply to the non-fault section. Some DTUs also have the functions of protection and automatic input of backup power.
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