Title: Facts and myths about Open Protocols
1 Facts and myths about Open Protocols
Interoperability A way forward
Surendra JhaloraMIOS forum, IEEMA
2Open Standard Interoperability
- Different interpretation by different people
- Attributes of an open standard
- Accessible to all, free of charge
- All details documented properly
- Open to public use/input/ comment
- Interoperability - The capability to communicate,
execute programs, or transfer data among various
functional units in a manner that requires the
user to have little or no knowledge of the unique
characteristics of those units.
3The Need
- With the growth in AMR systems, there is a need
for - Reading of different makes and models of meters
through a common software - Seamless system integration in case of meter
replacement/ new meter addition - High speed data transfer, large data volume,
exceptional events notification and selective
data transfer - High system performance for old as well new
meters
Open protocol for energy meters like IEC 62056/
DLMS, ANSI, IEEE, MODBUS as per SRS of RAPDRP
Can these different open protocols really
provide interoperability?
4MODBUS Protocol
- Widely used for different applications
- Parameters with their configurations are
published. - Register mapping Two different manufacturers
can map same set of data on different MODBUS
registers. - Data type Different data type can be defined
for same parameter. - Scaling Basic Unit these can be different for
different make of meters and with different
resolution.
5IEC 62056
- An open standard for data transfer from energy
meters - Manufacturer specific objects
- Parameters which are not defined in standard can
be mapped as manufacturer specific objects. - Similarly, there can be manufacturer specific
profiles. - Display representation is not standardized.
- Selection of security levels has been left with
manufacturer.
6Conclusion
- MODBUS
- Has dependency on manufacturer specific register
mapping, data type and scaling. - Is nothing but a proprietary protocol in absence
of above information. - IEC 62056
- Interoperable only up to a certain level.
- Most of the meter parameters, as used in India,
are not standardized. Hence, different makes of
meters define different manufacturer specific
objects.
Too many options multiple implementations can
hamper interoperability.
7Conclusion
- Meter/ make specific implementation is must in
common data retrieval software. - Issues with Open protocols
- Insufficient specification coverage
- Too many options for implementation
- Provision for independent implementation with
manufacturer - Compliance testing is not an Interoperability
Testing
Open protocols does not provide interoperability,
until all parameters are clearly defined with
details.
8What We Need..
- Vision for next 5-10 years is the key.
- Critically review the future requirements of
Electricity metering and AMR/ RMR systems. - Migration from AMR to AMI
- Define metering parameters clearly for different
applications and segments. - Define system performance parameters and
implementation plans.
9Future Migration
AMR Automatic Meter Reading
AMI Advance Metering Infrastructure
SMART GRID
Are we on this path ?
10How AMI differs from AMR?
11Key Drivers for AMI
- AMI drivers in India -
- Demand shortage
- Revenue protection
- Loss reduction
- Energy accounting
- Load control
- System automation
- Better system economics
- Many more.
- Energy conservation
- Consumer involvement
- Reduce carbon emission
- Load management
- Better system planning
- Drivers may be different for different
countries.
12AMI Putting things simply
WAN
N M S
Blue blocks are electronic devices
Yellow blocks are communication link
13AMI System Note the multiplicity of each element
14Requirements for future metering system
- Define metering parameters for different
applications - Segments Grid metering, Feeder meter, HT
consumers, DT metering, LT consumers, Domestic
consumers - Parameters -
- Tariffs
- Energy types
- Demand registers
- Load survey
- History
- Tamper detection recording
- Events and alarms
- Load control parameters
- Energy auditing parameters
Standardization of parameters to achieve
interoperability
15Requirements for future metering system
- Define system performance parameters
- Data storage
- Throughput required (data volume and speed)
- Data selectivity
- Flexibility of configurations
- Security levels
- Compatibility with communication technologies
- Consumer interface and engagement
Conduct pilots prior to large scale rollout
16Thanks
17Global AMI Migration Experiences
18Australia AMI
- Govt. formed industry strategy group for planning
and implementation of AMI trials and roll out. - Developed state-wide set of core functionality
and service level requirements. - Cost benefit analysis done for various
functionalities. - Trials are mainly about technologies (excludes
customer response or pricing trials). DLC, Mesh
Radio, PLC trials being done. - Roll out planned for typically 2.4M meters, in
3-4 yrs duration.
19UK AMI
- Drivers
- CO2 reduction under Climate Change Program
- The Energy End-Use Efficiency and Energy Services
Directive (ESD) - Energy Efficiency Commitment (EEC)
- SRSM (suppliers requirement for smart meters) by
ERA - All the stake holder inputs in the requirement
specification - Vision and Migration being defined
- Pilots underway
- Govt. approved to change 46Mn meters in next 10
years