Download Stakeholder Comment and AESO Replies Matrix

Stakeholder Comment and AESO Replies Matrix
Proposed New and Amended Definitions Related to Proposed New ISO Rules Section 502.13, Battery Energy Storage Facility Technical Requirements (“New Section 502.13”) and
Section 502.14, Battery Energy Storage Facility Operating Requirements (“New Section 502.14”) (“New and Amended ISO Rules Definitions”)
Date of Request for Comment:
Period of Comment:
September 28, 2015
September 28, 2015
through
October 26, 2015
Existing
Proposed
Stakeholder Comments and/or Alternate
Proposal
No definition currently exists for the
ISO Rules
“energy storage facility” means a facility with
technologies capable of storing and releasing
electric energy.
Capital Power Corporation
1. Capital Power has no issues with the proposed
New ISO Rules Definitions.
1. The AESO acknowledges Capital Power
Corporation’s comment.
“maximum authorized charging power”
means, for an energy storage facility, the
maximum gross real power that the ISO has
authorized each energy storage facility to
receive from the interconnected electric
system, as measured at the low voltage side of
the transmission system step-up transformer.
NextEra Energy Canada
2. NextEra Energy Canada (“NextEra”) would like
to offer the following comments on the
definitions of “Maximum authorized charging
power” and “Maximum authorized discharging
power” for the AESO’s consideration. Both
definitions state that they are measured at the
low side of the transmission system step-up
transformer. For sites in which the battery
energy storage facility is collocated with another
generating facility (e.g. wind facility), and utilizes
2. The AESO does not agree that these definitions
should be amended. The definitions apply to all
types of energy storage facilities, not only to
inverter based technologies. The definitions
clearly refer only to the energy storage facility’s
portion of a larger generating asset. Where the
energy storage facility is co-located with another
generating facility, the maximum authorized
charging power or maximum authorized
discharging power of the energy storage facility
AESO Replies to Stakeholder Comments: 2016-02-25
AESO Reply
Page 1 of 3
the same step-up transformer will the ISO allow
an exception and consider this measurement
point to be at the battery energy storage
terminals (i.e. inverter terminals) so the wind
facility and battery facility metering are not comingled for this purpose? Otherwise, please
consider redefining to say “…as measured at
the low voltage side of the transmission system
step-up transformer, or at the energy storage
facility terminals if co-located with other
generating facilities and utilizing common stepup transformers.”
can be measured independently of the other
generating resources within that facility.
Accordingly, no changes have been made to the
definition of “maximum authorized charging
power” or “maximum authorized discharging
power” in response to NextEra’s comment.
“maximum authorized discharging power”
means, for an energy storage facility, the
maximum gross real power that the ISO has
authorized each energy storage facility to
deliver to the interconnected electric system,
as measured at the low voltage side of the
transmission system step-up transformer.
“normal clearing” means that a protection
system operates as designed and the fault is
cleared in the time normally expected with
proper functioning of the installed protection
systems.
Existing
Proposed
Stakeholder Comments and/or Alternate
Proposal
“voltage regulating system” means
the equipment that automatically
controls the reactive power
resources to regulate the voltage
level at any collector bus.
“voltage regulating system” means the
equipment that automatically controls the
reactive power resources to regulate the
voltage level at any collector bus:
(i) at any collector bus for an aggregated
generating facility; or
(ii) at a control point for an energy storage
facility, as specified by a market
participant in accordance with the
applicable section of the ISO rules.
Capital Power Corporation
3. Capital Power has no issues with the proposed
Amended ISO Rules Definitions.
AESO Replies to Stakeholder Comments: 2016-02-25
AESO Reply
3. The AESO acknowledges Capital Power
Corporation’s comment.
Page 2 of 3
“gross real power” means:
(i) for aggregated generating
facilities with one or more
collector busses, the sum of
real power delivered by the
generating units measured at
those collector busses;
(ii) for aggregated generating
facilities without a collector
bus, a real power
measurement at the generator
terminal for each generating
unit; or
(iii) for a generating unit that is not
part of an aggregated
generating facility, the real
power measurement at the
generator terminal.
“gross real power” means:
(i) for aggregated generating facilities with
one or more collector busses, the sum of
real power delivered by the generating
units measured at those collector
busses;
(ii) for aggregated generating facilities
without a collector bus, a real power
measurement at the generator terminal for
each generating unit; or
(iii) for a generating unit that is not part of an
aggregated generating facility, the real
power measurement at the generator
terminal; or
(iv) for an energy storage facility, the real
power measurement at the low voltage
side of the transmission system step-up
transformer.
AESO Replies to Stakeholder Comments: 2016-02-25
Page 3 of 3