Download Proposal for Battery Facilities Technical and Operating Requirements Work Group Session

Proposal for Battery Facilities Technical and
Operating Requirements
Work Group Session
November 20th, 2013
Battery Facilities – Work Group – Nov 20th, 2013
Agenda
• Introductions
• Background
• Purpose
– Q&A on AESO Paper “Proposal for Battery Facilities Technical
and Operating Requirements”
– Review each section to ensure market participant
understanding of the proposals contained within the paper
• Discussion of Technical Requirements
• Additional Questions and Comments on Technical
Requirements
• Next Steps
2
Battery Facilities – Work Group – Nov 20th, 2013
Background
• 2011 – AESO & Alberta Innovates Technology Futures conduct a
study on using ES to support dispatch of WAGFs
• FERC issues direction to allow non-generating resources to
participate in energy and OR markets
• 2012 – interest in integrating ES facilities into the Alberta Market
increased
– driven by the funding initiative of CCEMC
– currently three ES projects with SASR’s, two of which are batteries
• 2013 – NERC approves new BAL-002-WECC-1 which allows nongenerating resources to participate in energy and OR markets
– Awaiting FERC approval before being adopted in Alberta
3
Battery Facilities – Work Group – Nov 20th, 2013
Purpose
• Two projects with SASR’s for battery facilities
– All facilities must connect to the transmission system with
requirements that promote the safe and reliable operation on
the transmission system
– The requirements must be fair and efficient for all market
participants
– The current rules/standards for generating units and WAGF’s
are not a good fit for batteries due to the unique technical and
operational characteristics of batteries
• The proposed rules 502.13 and 502.14 will address the
issues for the interconnection and operation of the battery
facilities
4
Battery Facilities – Work Group – Nov 20th, 2013
Purpose
• As required, other rules will be created or updated to
address:
– other ES technologies such as:
• pumped storage hydro;
• compressed air energy storage;
• flywheels; and
• super-conducting magnetic energy storage
– markets-related issues;
– operating reserve (OR) technical requirements or procurement
practices; and
– ISO tariff
5
Battery Facilities – Work Group – Nov 20th, 2013
Technical Requirements - General
• AESO proposal: Battery facility technical requirements will be
generally in alignment with the requirements for synchronous
generating units.
• AESO proposal: Performance-based and not equipmentbased requirements.
• AESO proposal: Refer to the batteries as a source and sink
resource.
– More accurately describes the behaviour of batteries than:
• generation and load
• positive and negative generator
6
Battery Facilities – Work Group – Nov 20th, 2013
Technical Requirements - General
• AESO proposal:
Create two rules:
– 502.13 for the connection of a battery facility which would
incorporate the engineering, design and construction
requirements.
– 502.14 for the operation of a battery facility which would
incorporate the ongoing operation and testing requirements.
• Similar to the layout of the proposed generator rules (proposed
sections 502.5 and 502.6 of the ISO rules). The format of these
rules was well received by participants during the consultation
period on these rules.
7
Battery Facilities – Work Group – Nov 20th, 2013
Technical Requirements - General
• For interconnection and operation the impact on other
existing ISO rules may need to be reviewed and have
incidental amendments:
– Section 502.4 Automated Dispatch and Messaging System and
Voice Communication System Requirements;
– Section 502.3 Protection Technical Requirements; and
– Section 502.8 SCADA Technical Requirements
8
Battery Facilities – Work Group – Nov 20th, 2013
Technical Requirements - General
• AESO proposal: The technical requirements will be
applicable to all transmission connected battery facilities
regardless of size.
– This is consistent with both synchronous generating units and
WAGFs.
– It is the AESO’s view that small battery facilities are more likely
to be distribution connected and the legal owner of an electric
distribution system (DFO) will have its own technical and
operating requirements, which are outside the scope of this
proposal.
9
Battery Facilities – Work Group – Nov 20th, 2013
Technical Requirements
Energy Storage - Battery Facility Single Line Diagram
10
Battery Facilities – Work Group – Nov 20th, 2013
Technical Requirements
Maximum Authorized Real Power (MARP)
•
AESO proposal: Review the current definition of MARP to
determine if it needs to be revised.
–
Should MARP be applied to the full range of the battery
capability or only to the sourcing capability?
•
•
The workgroup may need to consider battery facilities that do
not have symmetrical sourcing and sinking capabilities.
AESO proposal: The market participant will declare the
MARP that is alignment with other aspects of the rule.
–
This aligns with technical requirements for WAGF’s and
synchronous generating units.
11
Battery Facilities – Work Group – Nov 20th, 2013
Technical Requirements
Maximum Authorized Real Power (MARP) - Example
•
The facility has a 15 MWhr battery
–
–
The facility could be designed to source:
•
5 MW for three hours; or
•
15 MW for one hour
In either case the facility could be designed to sink:
•
5 MW for three hours; or
•
15 MW for one hour
–
If only sourcing capability is considered the possible MARP’s are 5
or 15 MW.
–
If only sourcing and sinking capabilities are considered the range of
possible MARP’s are 10 through to 30 MW.
–
A key issue will be transformer sizing.
12
Battery Facilities – Work Group – Nov 20th, 2013
Technical Requirements
Operating Voltage Requirements
• AESO proposal: The market participant provides the AESO
with the values for the high side voltage of the inverter
transformer and the high side voltage of the transmission
system step-up transformer.
– The high side voltage of the inverter transformer to be used to
assess/confirm compliance to the reactive power and the
voltage regulation capabilities of the facility; and
– The high side voltage of the transmission system step-up
transformer to be used to assess/confirm compliance to the
voltage ride through capabilities.
– This aligns with technical requirements for WAGF’s and
synchronous generating units.
13
Battery Facilities – Work Group – Nov 20th, 2013
Technical Requirements
Voltage Ride-Through Requirements
• AESO proposal: The battery facility meets the requirements
of the NERC reliability standard PRC-024-1
– This requirement would be applicable when the battery facility
is operating as a source or a sink.
– Note when the AESO adopts PRC-024-1 the AESO will
remove this from the rule.
14
Battery Facilities – Work Group – Nov 20th, 2013
Technical Requirements
Voltage Ride-Through Requirements
15
Battery Facilities – Work Group – Nov 20th, 2013
Technical Requirements
Voltage Regulation
• AESO Proposal: The battery facility has a voltage regulating
system (VRS) that is in-service and controlling voltage
whether the facility is operating as a source or sink.
– Power flow can be ramped very quickly from source to sink and
back again.
– Turning the VRS on and off as the battery facility ramps from
sink to source and back may cause the transmission system
voltage to fluctuate at unacceptable levels.
– If this occurs several times in an hour it may result in
unacceptable flicker on the transmission system.
– The point of control must not be the transmission system.
16
Battery Facilities – Work Group – Nov 20th, 2013
Technical Requirements
Voltage Regulation
• AESO Proposal: For battery facilities located within other
generating facilities such as WAGFs the participant may use
the existing VRS to control the battery facilities.
– The VRS must be in service when the battery facility is in
service regardless of the state of the WAGF.
17
Battery Facilities – Work Group – Nov 20th, 2013
Technical Requirements
Reactive Power Capability
• AESO Proposal: The battery facilities have a full dynamic
reactive power capability whether the facility is operating as a
source or sink.
– This proposal is in alignment with the proposal for voltage
regulation.
– Battery facilities located within other generating facilities such
as WAGF’s the participant may use that facility’s reactive
power resources in place of using the battery facility.
– The reactive power obligations of the facility must be in
alignment with the MARP associated with the entire facility.
18
Battery Facilities – Work Group – Nov 20th, 2013
Technical Requirements
Reactive Power Capability
19
Battery Facilities – Work Group – Nov 20th, 2013
Technical Requirements
Reactive Power Capability
20
Battery Facilities – Work Group – Nov 20th, 2013
Technical Requirements
Transmission System Step-up Transformer
• AESO Proposal: The capability of the transformer must allow
for the vector sum of the real power capability and the
reactive power obligations of the battery facility.
– This is in alignment with the requirements for WAGFs
and synchronous generating units.
• A favorable circuit to block the transmission of harmonic
currents;
• Isolation of transmission system side ground fault current
contributions; and
• An effectively grounded wye connection on the high voltage side
of the transmission system step up transformer.
21
Battery Facilities – Work Group – Nov 20th, 2013
Technical Requirements
Off Nominal Frequency
• AESO proposal: The battery facility meets the requirements
of the NERC reliability standard PRC-024-1
– This requirement would be applicable when the battery facility
is operating as a source or a sink
– Note when the AESO adopts PRC-024-1 the AESO will
remove this from the rule
Frequency (Hz)
>61.7 Hz
61.6 Hz to 61.7 Hz
60.6 Hz to <61.6 Hz
>59.4 Hz to <60.6 Hz
>58.4 Hz to 59.4 Hz
>57.8 Hz to 58.4 Hz
>57.3 Hz to 57.8 Hz
>57.0 Hz to 57.3 Hz
≤57.0 Hz
Minimum Time Delay
0 seconds
30 seconds
3 minutes
Continuous Operation
3 minutes
30 seconds
7.5 seconds
45 cycles
0 seconds
22
Battery Facilities – Work Group – Nov 20th, 2013
Technical Requirements
Off Nominal Frequency
– Tripping must not take place inside the red and blue boundaries
– Tripping may take place outside the red and blue boundaries
62.5
62
Instantaneous tripping is permitted
at 61.7 Hz and above.
< 61.7 and > 61.6 Hz @ 30 s
61.5
61
< 61.6 and > 60.6 Hz @ 180 s
60.5
Frequency (Hertz)
60
> 59.4and < 61.6Hz = continuous operation
59.5
59
> 58.4 and < 59.4 Hz @ 180 s
58.5
> 57.8 and < 58.4 Hz @ 30 s
58
57.5
> 57.3 and < 57.8 Hz @ 7.5 s
57
> 57 and < 57.3 Hz @ 0.75 s
Instantaneous tripping is permitted at
57.0 Hz and below.
56.5
56
-50
0
50
100
150
Time (seconds)
Under Frequency Requirement
200
250
300
Over Frequency Requirement
23
Battery Facilities – Work Group – Nov 20th, 2013
Technical Requirements
Frequency Responsive Control System
• AESO proposal: The battery facility has frequency
responsive control system requirements when sourcing or
sinking real power.
– respond to both over and under frequency events.
– The response characteristics would be similar to that of
generating units in terms of droop, dead band, etc.
24
Battery Facilities – Work Group – Nov 20th, 2013
Technical Requirements
Real Power and Ramp Rate Control
• AESO proposal: The battery facility has real power and ramp
rate control systems in service whether sourcing or sinking
real power.
– Battery facilities can ramp from full charge to full discharge in a
few cycles, and depending on the size and location of the
facility this behavior could appear as a system disturbance
rather than assistance to transmission system.
– There are similar issues with WAGF’s and the AESO uses a
default setting of 10% of the facility rating per minute.
• There maybe advantages of a higher ramp rate for battery
facilities.
• The exact number may have to be developed on a project by
project basis.
25
Battery Facilities – Work Group – Nov 20th, 2013
Technical Requirements
Power Quality
• AESO proposal: The battery facility has power quality
requirements that are applicable to the battery energy
storage facility when sourcing or sinking real power.
• The key parameters will be similar to WAGF’s and
synchronous generating units including:
– voltage flicker;
– harmonic control;
– resonance; and
– voltage unbalance.
26
Battery Facilities – Work Group – Nov 20th, 2013
Technical Requirements
WECC Stability Control
• AESO proposal: The battery facility will have no requirements
for stability control systems at this time but if in the future
either the WECC or the AESO require such systems that
battery facilities have this capability.
– At this time there are no requirements from WECC to have
stability control systems similar to power system stabilizers.
– It is the AESO’s understanding that battery facilities will not
contribute to either intra- or inter-area oscillations but may have
the ability to assist in decreasing the oscillations.
27
Battery Facilities – Work Group – Nov 20th, 2013
Technical Requirements
Synchrophasor Measurement
• AESO proposal: Synchrophasor measurement systems be
installed at the battery facility’s the high voltage side of both
the inverter transformer and transmission system step up
transformer.
– The AESO believes that such a system will provide valuable
information to both the participant and the AESO regarding the
performance of the battery facility.
– Modern protective relays have this capability built in.
28
Battery Facilities – Work Group – Nov 20th, 2013
Technical Requirements
Facilities Testing Post Connection
• AESO proposal: The voltage regulation and power
conversion models be validated during commissioning.
• AESO proposal: The models be revalidated every five years.
• AESO proposal: The reactive capability of the battery facility
will also be verified at the same intervals.
– The proposals are in alignment with the synchronous
generating unit’s rules and upcoming NERC reliability
standards.
29
Battery Facilities – Work Group – Nov 20th, 2013
Next Steps
• AESO proposal: The following matters will be implemented in
alignment with the requirements for WAGF’s and
synchronous generators.
• facilities disconnection
• isolating devices
• fault interrupting devices
• operator availability
• grounding
• lightning surge protection
• requirements to operate and
maintain a battery facility in
accordance with ISO rules
• requirements for operation at
maximum authorized real power
• operating data requests
30
Additional Questions and Comments on the
Technical Requirements
• Are there any other comments on the battery facility technical
requirements?
31
Battery Facilities – Work Group – Nov 20th, 2013
Technical Requirements
• The AESO invites stakeholders to provide comments on this
paper by December 11, 2013 on the proposals for the
technical requirements for battery facilities brought forward in
the paper.
• The AESO will respond to the comments in Q1 2014.
• After a review of the comments the AESO will determine the
need for additional work group sessions.
32
Thank you