20220525Final Approved Tariffs.pdf

ROCKY MOUNTAIN
POWER
I.P.U.C. No.1
Second Revision of Sheet No. 13R.1
Canceling First Revision of Sheet No. 13Rl
to
ELECTRIC SERVICE REGULATION NO. 13
STATE OT'IDAHO
Curtailment Plan for Electric Energy
INTRODUCTION:
The Idaho Public Utilities Commission orderedrthe Company and other suppliers of electric service operating
in the State of Idaho to adopt provisions relating to electric service curtailment. This document summarizes
the curtailment plan employed by the Company to temporarily intemrpt electric service to its customers during
emergencies and power shortages. It is intended to provide equitable procedures for the curtailment of power,
minimize adverse impacts to essential servicesn and customers, while maintain overall system reliability.
The curtailment plan is operational 24 hours a day, 365 days a year, to help ensure that the Company is able
Match customer demand and electrical supply generation;
Maintain the integrity of the electrical network;
Deploy available resources to restore electrical supply to normal as soon as is practicable;
Apply existing processes to keep customers and stakeholders informed of the state and progress of the
incident or emergency;o Utilize communication avenues to appeal to customers to reduce electricity consumption;o Coordinate with appropriate agencies to provide options to lessen the impact to customers;o Meet applicable operating standards.
Operating Standards
The Company is a member of the Western Electricity Coordinating Council (WECC), one of the eight
Regional Entities of the North American Electric Reliability Corporation (NERC). The Company also
supports Regional Reliability Coordinators, who monitor voltages, frequencies, and other reliability indices.
WECC develops and implements Regional Reliability Standards and Criteria for the Westem
Interconnection and is the regional entity responsible for compliance monitoring and enforcement with
delegated authority from the North American Electric Reliability Corporation GIERC) and Federal Energy
Regulatory Commission (FERC).
(Continued)
I Order No. 25259- November 24- 1993-
Submitted Under Case No. PAC-E-22-04
ISSUED: February 22,2022 EFFECTM: June 1,2022
IDAHO PUBLIC UTILITIES COMMISSION
Approved Effective
May 25, 2022 June 1, 2022
Per ON 35416
Jan Noriyuki Secretary
ROCKY MOUNTAIN
POWER
A DIVISION OF PAOFICORP
I.P.U.C. No.1
Second Revision of Sheet No. 13R.2
Canceling X'irst Revision of Sheet No. 13R2
Operating Standards (continued)
Bulk electric system reliability and operating standards for utilities in the westem part of the United States
provide for a coordinated effort to effectively manage enerry shortage situations and includes shedding firm
load in an emergency situation using the Company's Under Frequency and/or Under Voltage Load Shedding
programs to arrest declining frequency, assist recovery offrequency following under frequency events and
provide last resort system preservation measures to prevent a blackout or voltage collapse.
Emergencies that threaten the integrity of the electric system can develop at any time due to shortage of
generation or disturbances on the system, either locally or within the Westem Interconnect. The actions
necessary to prevent total collapse of the system will be to; restrict customer demand, match generation
availability, implement network capacity limitations. The circumstances necessitating a reduction in the
demand or consumption of electricity in the short term will require that immediate emergency action is taken
and may potentially lead directly to firm load curtailment.
SECTION I. PURPOSE AND OVERVIEW OT'TIIE CURTAILMENT PLAN
This plan identifies the process by which the Company would initiate and implement regional load curtailment.
The goal of this plan is to accomplish curtailment while treating customers fairly and equitably, minimizing
adverse impacts from curtailment, complying with existing State laws and regulations, and providing for
smooth, effi cient, and effective curtailment administration.
SECTION tr. LOAD CURTAILMENT
The Company will comply with all State and Federal mandates to curtail the electric energy used by its
customers to stabilize system voltage and frequency in order to prevent a regional system collapse. Events that
may trigger load curtailment, either upon notice from state agencies, the RC West Regional Reliability
Coordinator, or at the discretion of the Company, include but not limited to:
. Loss of major generation or transmission equipment due to mechanical or electrical failure.
o Extreme hot or cold temperatures that create a network peak where generation capacity does not meet load
center requirements.. System disturbance within the regional balancing area.
Initiation of Load Curtailment
Load curtailment will be initiated when directed by the North American Electric Reliability Corporation
(NERC), the Western Electricity Coordinating Council (WECC) authorities, or by order of the Idatro Public
Utilities Commission under authority provided for in ldaho Code $ 61-534. However, nothing precludes the
Company from requesting voluntary load reduction at any time.
ISSUED: February 22, 2022
(Continued)
EFFECTM: June 1,2022
Submitted Under Case No. PAC-E-22-04
IDAHO PUBLIC UTILITIES COMMISSION
Approved Effective
May 25, 2022 June 1, 2022
Per ON 35416
Jan Noriyuki Secretary
ROCKY MOUNTAIN
POWER
A DIVISION OF PACIFICORP
I.P.U.C. No. I
Second Revision of Sheet No. 13R.3
Canceling First Revision of Sheet No. 13R3
SECTION II. LOAD CLTRTAILMENT (continued)
Automatic, Remote and Manual Actions
Automatic actions occur through the operation of programmed protective equipment installed in the
Company's electrical system, including, without limitation, such equipment as automatic relays, generator
controls, circuit breakers, and switches. This equipment is preset to operate under certain prescribed conditions
which, in the sole judgment of the Company, threaten system performance, integrity, reliability or stability.
Where Supervisory Control and Data Acquisition (*SCADA") equipment is installed, the Company will
remotely control switches, circuit breakers, relays, voltage regulators or other equipment. [n areas where no
SCADA equipment is installed, actions are performed manually by on-site field personnel.
If actions are undertaken, then to the extent permitted by the operating characteristics of the electrical system,
the Company will perform such actions so that intemrption, curtailment, or fluctuation of service to customers
will be accomplished sequentially, unless it is necessary in the sole judgment of the Company, or if required
by the RC West Regional Reliability Coordinatorto vary said sequence in orderto protect system performance,
integrity, reliability, or stability.
SECTION TII. CI'RTAILMENT STAGES
State curtailment directives apply to all retail loads served within the State of Idaho. The curtailment stages
are associated with increasing energy deficits. The circumstances necessitating a reduction in the demand or
consumption of electricity in the short term will normally require that immediate emergency action is taken
and there may be no warning. Sudden equipment outages or loss of generation could potentially lead directly
to any curtailment stage without prior notice or progression of the stages described below.
Stage #Nature Estimeted
Curtailment Percent Type of Curtailment
Stage I Mandatory 5o/o +l-
Demand Side Management Programs
activated
Stage 2 Voluntary - public appeal
to restrict usage No specified %Uniform among all customers
Stage 3 Mandatory - peak
curtailment block rotation 2.5 to 3.5o/o +l-General Use Customers Residential
Customers
Stage 4 Mandatory --curtailment
block rotation 30%o of peak +l-General Use Customers Residential
Customers
Stage 5 Mandatory - Emergency
Load Shed Groups
o/o determinate upon RC West
Regional Reliability Coordinator
directive
Uniform among all customers
ISSUED: February 22,2022
(Continued)
EFFECTM: June 1,2022
Submitted Under Case No. PAC-E-22-04
IDAHO PUBLIC UTILITIES COMMISSION
Approved Effective
May 25, 2022 June 1, 2022
Per ON 35416
Jan Noriyuki Secretary
ROCKY MOUNTAIN
EPH,E,^N",,
I.P.U.C. No.1
Second Revision of Sheet No. 13R4
Cancelins First Revision Sheet No. 13R4
SECTION TV. INITIATION OF LOAD CURTAILMENT
Block Rotation
Selected distribution feeders throughout the service territory have been grouped into blocks ofapproximately
100 MW in size. These blocks provide for two (2) hour rotational curtailments to be used in scheduled
combinations to ensure that the required load shed amount is achieved. Block rotation may be utilized to
support system stabilization following a system disturbance, or to maintain system integrity during peak load
periods.
During load curtailment the Company would rotate through the blocks until curtailment is no longer necessary.
Block rotation is dependent on what day of the week and time of day the curtailment event is enacted. This
provides for equitable treatment to affected customers. Blocks are aggregated to match reduction thresholds
during events.
Emergency Load Shed Groups
Predetermined localized load shed groups are utilized for situations where load reductions might be necessary
for specific high load areas. These areas generally require specialized load curtailment schemes to
accommodate transmission path restrictions. Load shed groups contain only SCADA controllable circuits.
Minimization of Imoact
The Company will implement rotational curtailment in as fair and equitable a manner as practicable, with the
goal of minimizing the impacts on communities. Where known and feasible within operational parameters,
distribution feeders serving facilities essential to the public welfare are avoided during rotational curtailment.
However, it should be noted that the Company cannot definitively account for all such facilities, nor is it
possible to exclude every known facility from the impacts of curtailment.
Such essential facilities include:. Hospitals
o 9l I centers. Airports and FAA facilities
o Large sewer and water treatment plants. Major metropolitan downtown core areas
o Facilities critical to electric system operation
o Prisons, police, and fire stations including related computer and communication centers. Radio, TV news, emergency broadcast stations and transmitting facilities
o U.S. Military installations
(Continued)
Submitted Under Case No. PAC-E-22-04
ISSUED: February 22,2022 EFFECTM: June 1,2022
IDAHO PUBLIC UTILITIES COMMISSION
Approved Effective
May 25, 2022 June 1, 2022
Per ON 35416
Jan Noriyuki Secretary
ROCKY MOUNTAIN
POWER
A DIVISION OF PACIFGORP
LP.U.C. No. 1
Second Revision of Sheet No. 13R.5
Canceling First Revision of Sheet No. 13R5
SECTION V. NOTIFICATIONS AND ACTIONS
Throughout the curtailment period the Company will provide customers and external State and regulatory
stakeholders with as much information as possible utilizing established processes and protocols.
The Company's incident management strategy for an energy emergency is consistent with the National
Incident Management System and Incident Command System, and provides effective coordination through:
o Procedures that allow system and field operations to focus on critical functional responsibilities;. Providing pertinent information to internal and extemal stakeholders, customers, regulators, media
outlets, etc.;o Flexible response to changing circumstances, special customer needs and emergencies.
Stage 1: Demand Side Management Programs
The Company would not normally contact the public or news media when it exercises options under demand
side management programs.
Stage 2: Public Appealfor Conservation
At the Company's discretion, a public appeal for voluntary enerry conservation may be issued through media
outlets, social media platforms, and automated outbound calling of customers requesting voluntary curtailment
ofnonessential uses.
Additionally, the Company will initiate curtailment of all nonessential Company use, request curtailment of
nonessential use by govemmental agencies and institutions at all levels, request voluntary curtailment of
nonessential use in all large buildings, and direct specific requests to major use customers for voluntary
curtailment of nonessential use.
If additional curtailment is required the Company will intensiff its request to the public, including requests to
curtail less-essential uses, and notice that if curtailment does not occur, mandatory curtailment may be
necessary by utilizing block rotation methods.
Stage j: Peak Load Curtailment
Prior to any rotating outages, the Company, to the best of its ability will contact key external stakeholders to
inform them ofthe situation. To the extent possible, areas targeted for rotating outages may be disclosed at
this time, together with some estimate of how long the outages will be necessary. The magnitude of the event
will dictate the administrative level to which external notifications will be made.
(Continued)
EI'FECTM: June l,2022
Submitted Under Case No. PAC-E-22-04
ISSUED: February 22,2022
IDAHO PUBLIC UTILITIES COMMISSION
Approved Effective
May 25, 2022 June 1, 2022
Per ON 35416
Jan Noriyuki Secretary
Y ROCKY MOUNTAIN
POWER
A DIVISION OF PACIFICORP
LP.U.C. No.1
Second Revision of Sheet No. 13R6
Canceling X'irst Revision of Sheet No. 13R6
SECTION V. NOTIFICATIONS AIID ACTIONS (continued)
Key external stakeholders include, but are not limited to:o Governor's officeo Public Utilities Commissiono State enerry/emergency response officials. Legislativeleadership. Key customer accounts
Stage 1: Bloch Load Curtailment
In addition to the actions above, to the extent possible, customers in the areas targeted for rotating outages will
be notified as soon as practicable and provided with an estimate of the time their block will be curtailed and
the expected duration.
Stage 5: Emcrgency Load Shed Groups
Generally, no advance notice of an event necessitating emergency load shed is available. Thereforen it is to be
expected that all intemal and extemal notifications will occur as soon as information is known.
Submitted Under Case No. PAC-E-22-04
ISSUED: February 22, 2022 EI'FECTM: June l,2022
IDAHO PUBLIC UTILITIES COMMISSION
Approved Effective
May 25, 2022 June 1, 2022
Per ON 35416
Jan Noriyuki Secretary