AMR – not only energy remote reading
•
The primary role of automated meter reading (AMR) systems is to provide
real time energy consumption data to the utility,
– but the cost of retrofitting the existing energy metering system may not
be justified if the meters are used only for reading energy consumption
once a year
•
Benefits of AMR installations are sought out e.g. from development of
– demand side management (e.g. load control and dynamic tariffs)
– network operation and planning
– customer service
•
Current development issues cover measurement features development and
integration of AMR into operational information systems
•
AMR –technology and modern open computer system architecture enable
the development of new functions and business models
New way of distribution network management
by using AMR
•
AMR system can be used as an extension of SCADA and DMS for controlling and
monitoring also the fuse protected networks, especially LV-networks
Asset
management
Control
center
network data
customer data
DMS
SCADA
Substation
automation
Billing
Measurement
data base
AMR system
Balance
settlement
Fault Management –
case: broken zero conductor
•
Network coloring can show where it can be broken
Using AMR in low voltage network
management
•
Traditionally a low voltage (LV) network fault is cleared by blown fuse and
no information is received to the control centre
– the existence of a LV-network fault is usually based on customer calls
– automatic monitoring has been used only in medium voltage networks
•
Using advanced AMR meter as a smart terminal unit and gateway for real
time two-way communication enables alarms on exceptional events, e.g.
network faults and voltage violations
•
Low voltage network management may include functions, e.g, to:
– indicate automatically if a fuse in the low voltage network has burnt or
a conductor is broken
– locate the fault
– isolate the customer from the network if needed
– provide accurate interruption data
– monitor voltages at customer site in real-time
– provide power quality information for customer service
Pilot implementation
•
Pilot implementation and field testing phase is in progress in the pilot
company Koillis-Satakunnan Sähkö Oy after test phase in laboratory in real
time digital simulator (RTDS) environment
Comprehensive network management
•
Using integration of AMR, DMS and QMS (i.e quality monitoring system) in network
operation, asset management, customer service and other functions
Asset
management
Control
center
network data
customer data
Customer service
Billing
QMS
DMS
SCADA
Measurement
data base
Balance
settlement
AMR system
Substation
automation
DMS = Distribution Management System
QMS = Quality Monitoring System
Using AMR in power quality monitoring
•
So far voltage quality is usually monitored temporarily at customer sites
based on customer reclamations
•
Comprehensive and continuous power quality monitoring over entire
distribution network gives however important information for various
operations of distribution company
•
The novel AMR technology makes it possible to integrate basic power quality
functions to AMR meter
– in addition to register interruptions with time-stamps different quantities
for each of the three phases can also be metered depending on the
meter configuration
•
The idea is to gather information from LV-level and integrate it, e.g., with
information from substations and data of network data bases for network
planning and operation, and customer service purposes
AMR in network asset management
•
Network operation
– low voltage network management (e.g. burnt fuse indication)
– information for customer service
– more accurate real-time state estimation of the whole network
• voltages, loads, losses, stressing of components
– optimization of network operation (e.g. topology, voltage control)
•
Power quality monitoring and management
– continuous voltage quality monitoring (actual values / long term statistics)
– interruption registrations
•
Network planning
– more accurate load models for network calculations
– realization on power quality (i.e. interruptions, voltage dips, voltage level)
allocation of measures and investments
– losses, stressing of components