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Use of SNMP in the Management of Electrical Energy Measuring Systems

Use of SNMP in the Management of Electrical Energy Measuring Systems. Gustavo Mendes gustavo@dsc.ufcg.edu.br. Introduction. Problem 1 : to manage a complex electrical energy net; Problem 2 : to control the net devices; Problem 3 : imprecision and inefficiency in the gathering;

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Use of SNMP in the Management of Electrical Energy Measuring Systems

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  1. Use of SNMP in the Management of Electrical Energy Measuring Systems Gustavo Mendes gustavo@dsc.ufcg.edu.br

  2. Introduction • Problem 1: to manage a complex electrical energy net; • Problem 2: to control the net devices; • Problem 3: imprecision and inefficiency in the gathering; • Problem 4: how to manage and control this net?

  3. Agenda • SALAMEs architecture • Management Station functions • SNMP(Simple Network Management Protocol) in SALAME system • A MIB to the measuring systems management • Final considerations

  4. SALAMEs architecture RC TC MS TC RC ... TC ... RC ... TC Adapter Adapter Adapter Adapter Adapter Meter Meter Meter Meter Meter • What to manage? MS = Management Station RC = Regional Concentrator TC = Transformer Concentrator

  5. Modules • Management Station[MS]: control and manage devices; • Regional Concentrator[RC]: Data gathering; • Transformer Concentrator[TC]: monitor a set of meters;

  6. Modules • Adapter: gateway between CT and meter; • Meter: conventional meter;

  7. Modules - Communication EG CR CT SNMP MODBUS TCP/IP Adapter-Meter PLC –Power Line Carrier

  8. Management Station Functions • Access Control; • Communication error management; • Remote control of the devices; • Polling of the devices

  9. Management Station Functions • Management of execution logs; • Network devices control; • Reports to the clients;

  10. SNMP in SALAME system • 4 components in Network management systems: • Manageable elements; • Management Station; • Management protocol; • Management informations;

  11. SNMP in SALAME system • Elements of SNMP: • Management stations; • Agents; NMS Agent Send of trap Request made to agent • The answer to the request Communication flow

  12. SNMP in SALAME system • Communication between TCP/IP and SNMP;

  13. SNMP in SALAME system • Structure • Managed objects are disposed hierarchically in a tree; • Each subtree has an specific OID ( Object Identifier ) that is unique; • As example, OID .1.3.6.1.4.1.12214 in SALAME system is the same of .iso.org.dod.internet.private.enterprises. ufcg

  14. SNMP in SALAME system • Structure of the objects in Salame system:

  15. SNMP in SALAME system • SNMP supports 2 kinds of operations: • Get; • Set; Consumption of the Meter x.x.x.x.x.x Management Station Agent(RC)Meter x.x.x.x.x • The agent answer with the consumption of the meter Consumption requisition - GET

  16. SNMP in SALAME system • Changing the adminStatus(off -> on): Set operation to change the adminStatus Management Station Agent(RC)Meter x.x.x.x.x • Answer about the update of the adminStatus Changing adminStatus - SET

  17. SNMP in SALAME system • SNMP allows not only to know if the device is working, but if it´s working well! • SNMP manages physical devices (routers, meters) and softwares(SGBDs and Web Servers)

  18. A MIB to the measuring systems management • Variables for: • Evaluation (ANEEL): DIC, MDIC, FIC; • Management : PhysAddr, HardVersion, SoftVersion, DateAndTime, AdminStatus, OperStatus, ContAbert, CommErr, Temperature; • Consumption: active energy, medium and maximum demand, inductive reactive energy and capacitive reactive energy;

  19. Final considerations • SALAME objectives to reduce the information access time to the companies and the energy consumers; • SNMP simplifies this approach; • The network management becomes a less expensive process;

  20. References • [1] – Lopes, Raquel V., Sauvé, Jacques P., Nicolleti, Pedro S. Melhores práticas para Gerência de Redes de Computadores. Campus, 2003 • [2] – Mauro, Douglas R., Schmidt, Kevin J. Essential SNMP. O´REILLY, 2001

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