Joint IOU HAN Use Case
Definitions / Assumptions / Actors
* note, only add assumptions if they are specific to the use case
o The “Utility AMI to HAN” interface exists.
o All communications between the Utility AMI network and the HAN Devices are passed
through the AMI Network Gateway.
o A process exists to connect/bind the customer’s HAN to the Utility AMI network.
o HAN communications may be limited to the customer’s HAN, and may securely cross the
“Utility AMI to HAN” interface.
o HAN devices have been safety tested and are approved by a nationally recognized test
facility (Manufacturers to determine).
o HAN devices comply with all applicable FCC requirements.
o Utility AMI interoperable HAN devices are remotely upgradeable.
o The original equipment manufacturer will provide operating manuals and technical
support for HAN devices to the end use customer. This includes installing, operating, and
o If net metering, the home’s electric panel upgrade has occurred and the electrical
circuits and wiring can handle the discharging process.
o For EV/PHEV, the vehicle has some onboard intelligence and communication capability. o Customers can override a non-emergency curtailment request (e.g. pricing events). o Customers can not override an emergency curtailment request.
o Non-Interoperable HAN devices will not participate in Utility sponsored rates and
o In order for customer HAN devices to communicate with the Utility AMI network, suitable
and appropriate security methods (including privacy protection) and capabilities within
the AMI and HAN devices must be implemented.
o The AMI project requirements apply to all customers, specifically to those under 200kW
o The ISO (i.e., transmission operator) and utility have determined that demand response
programs and events (e.g., Critical Peak Pricing) will be necessary for grid management o Load control device(s) at the customer site will take action based on price or specific
event (dependent on presence of the control devices and compliance with Utility
o The meter may serve as the interface between the utility and the customer’s load
control equipment (as opposed to using a separate gateway).
o The customer shall have the ability to pre-program the load control device at their site
to respond to event messages and/or pricing
o The customer shall have the ability to “over-ride” the automated load reduction event
response at their site
o Customers must be enrolled in a demand response program to enable communications
between the utility and the customer’s control devices
o Customers may, but do not have to, negotiate another communication method (such as
cable, DSL, WiMax, city-wide WiFi, etc…) for price, consumption, load, event messages
between their HAN devices and the AMI
o Customers will have the choice of which HAN devices participate in any offered demand
response program (subject to technical conformance with the offered demand response
program from the utility). [For example, the customer may have door open/close
sensors attached to the same HAN as their lights and thermostat and may choose to
only enroll the lights and thermostat in the demand response program.] o The utility AMI gateway sends daily time and rate synchronizations to the IHD. o If a device requires registration with the utility, the device is expected to contain volatile
and non-volatile memory. A portion of the non-volatile memory will retain registration
information in case there is a loss of power. Once power and communication is restored
to the device, it will automatically re-register itself based upon the last known “good”
o The HAN Device is utility compatible, meaning it is technology enabled to interoperate
with the AMI system.
o The AMI system supports meter device-specific, consumer-specific and location-specific
rates/billing. (e.g. Electric Vehicle (EV), Plug in hybrid electric vehicle (PHEV)). o
o All physical and safety requirements are met.
o Display options are supported as required for the specific application including but not
limited to display of utility provided data.
o Utility AMI HAN interface or Utility AMI Gateway – Permits applications such as remote
load control, monitoring and control of distributed generation, in-home display of
customer usage, reading of non-energy meters, and integration with building
o AMI System – “the big picture”, includes Utility AMI HAN interface, AMI meter, AMI
network, Utility AMI network, Meter data management, Utility business processes. o Utility Enterprise System – Includes AMI system, Distributed Automation, and all other
enabling technologies of the utility operation.
o Standard Data Model - The ability to exchange information among multiple vendors’,
customers’ and utility’s equipment in the same system without the cost of specialized
o Security – Those measures that protect and defend information and information systems
by assuring their confidentiality, integrity, access controls, availability and accountability. o Remote Upgrade - The ability to correct defects, enable new features and applications,
change recording and reporting intervals, refresh security, and optimize network
operation without the cost of sending personnel to the customer site. o Network Management - The ability to remotely diagnose system components, and to
monitor and control the communication system.
o Price Event - Refers to a change in pricing sent to the device from the utility. o Emergency Event – CAISO or Utility initiated reliability events.
o Customer Over-Ride - Refers to a person adjusting the functional behavior of a device to
ignore Utility messages.
o Provisioning - Describes the commissioning or binding process of connecting a device to
o Pending Event - Refers to a price event or emergency event that is scheduled but has
not yet happened.
o Active Event - Refers to a price event or emergency event that is underway. o Installed Service Point (ISP) - Uniquely identifies the service delivery point. o Home Area Network (HAN) – customer’s premise communication system.
o Health Check - Operation performed by HAN device to determine proper functionality.
o Neighborhood Area Network (NAN) – communication system between multiple customer
o System Owner - The entity responsible for oversight and control of the entire system. o System Operator - The entity responsible for operation and control of a specific and
defined geographic / service area.
o Manufacturer - The entity responsible for production of the HAN device. o Installer - The entity responsible for placing the HAN device in service within the
o PCT - The Programmable Communicating Thermostat in the customer’s premise.
o In Home Display (IHD) - a standalone device and simply receives data and displays
information. It has minimal intelligence and storage capacity and receives data from the
AMI system through the Utility AMI gateway.
o A charging interval is the period of time that is bound by a start and stop of charging. Actors:
Actor Name Actor Type Actor Description
Customer Person Receives pricing and event information from the AMI.
Pre-programs responses to events into their load
controller(s). Needs to reduce their load throughout
the event to reduce energy costs or receive financial
HAN Devices Devices Equipment owned by the Customer (or, in some
cases, the Utility) and operating on the same HAN
as the Utility HAN devices and providing energy
management services to the AMI.
Customer Device(s) Any user interface available to the customer to Interface and/or System display information related to load management
and/or Utility HAN behavior, including but not
limited to a PCT, In-home LCD display, Personal
Computer, Fridge Magnet, and EMS etc… Connects
to, commissions and configures HAN devices in the
customer premises. Configures appropriate
demand response information such as price,
consumption, load or event responses. May store
data for customer audit and analysis. May be an
Energy Management System such as HomeSeer.”
AMI System The AMI system is made up of systems that are
required to enable remote two-way communications
with meters and data storage (e.g. MDMS and MS).
Metering System System System that can communicate with AMI meters (MS) remotely (e.g. program meters, test meters, retrieve
data). This system is a component of the AMI.
Utility AMI Device The logical network interface between the AMI and Gateway the HAN regardless of how that interface is embodied
– e.g. meter, substation, aggregator, set-top box,
DSL router, WiMAX box, etc
Customer System System that provides utility employees ability to
Service System view customer specific information regarding billing, (CSS) tariffs, programs, metering, interval usage, etc.
(e.g. system used by the call center)
AMI and/or HAN System Logical software entity that provides appropriate Trust Center security interactions to establish proper credentials
for AMI to HAN interaction(s).
System Automated Data System that can communicate with AMI remotely Collection (e.g. program meters, test meters, retrieve data). System (ADCS) This system is a component of the AMI.
Utility HAN Devices Equipment directly connected to load devices
capable of receiving curtailment, pricing, load, and event messages and carrying out the requests or
otherwise responding to them. Would also include
Customer Interface devices or systems described
below. The Utility HAN is a combination of three
things: 1) AMI meter (with HAN interface) and 2)
the customer selected or utility-supplied set of HAN-
Connected Control Equipment and 3) Customer
Interface. All devices on the Utility HAN, working in
concert, switch loads on or off or reduce load in
response to events or messages communicated by
the AMI system (AMI Meter). At least one device
needs to follow the pre-programmed rules (e.g.
PCT). The rest may be pre-programmed to respond
to messages or events, or may be programmed by
the Customer Interface.“
Customer HAN Device Customer device that coordinates the HAN Gateway commissioning and behavior. Customer device that
interfaces to, and routes network traffic between,
the HAN, external, non-HAN networks (such as
premises WiFi, cable, DSL, satellite, etc… networks)
and the Customer HAN Interface. May or may not
be the Premises Gateway.
Customer HAN Devices Equipment owned by the Customer and operating
on the same HAN as the Utility HAN devices and
providing non-utility use case services (such as
security, child monitoring, home entertainment or
other services). Prior to installation/provisioning a
subset of Customer HAN Equipment could be
attached to (or part of) load bearing equipment and
be capable of participation in AMI programs.
Pool Pump Devices The controller is a separate device and resides Controller between the timer and the pool pump. The
controller has minimal intelligence and sends and
receives signals through the HAN.
Customer Person or Intelligent system that consumer interacts to work
Representative System with a business (e.g. utility).
HAN Device Application Computer logic that automates certain registration Registration activities on behalf of a device or consumer.
In Home Display Device A standalone device and simply receives data and
(IHD) displays information. It has minimal intelligence
and storage capacity and receives data from the
AMI system through the Utility AMI gateway.
Energy Application Computer program used primarily for controlling Management energy-controllable devices (e.g. pool pump, PCT, System (EMS) light ballasts). Program may reside within a PCT,
computer, cable settop box, “smart” IHD, or other
computing device with ability to display parameters
and accept user input.