NYISO Real-time Market
Presentation to ERCOT METF – April 26, 2012
Confidential | ©2012 Ventyx, An ABB Company | 1
©2012 | Commercial in Confidence | Proprietary to Ventyx, An ABB Company
Agenda
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Ventyx real-time market implementations with look-ahead
capability
NYISO
RTC – Real Time Commitment
 RTD – Real Time Dispatch
 Pricing
 Load and storage devices
 Network Constraints
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Summary
Questions
©2012 Ventyx, An ABB Company
Presentation to ERCOT METF April 26 2012
2
Ventyx Real-time market with Look-Ahead capability
implementations
ISO
RTD
RTC
Online Dates
NYISO
X
X
IESO
X
CAISO
X
X
National Grid UK
X
X
1999
SMD2: 2005
2001
MIO: 2004
1998
RTMA: 2004
2013
©2012 Ventyx, An ABB Company
Presentation to ERCOT METF April 26 2012
3
Goals of NYISO Real-time Market
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Schedule commitment of fast-start generators
Schedule transactions for RTM
Dispatch energy, reserves and regulation at five-minute
intervals
Take into consideration future known events in making
current scheduling decisions
Consider network security
Allow system and area regulation and reserve constraints
Include Automatic Price Mitigation
Have rapid re-dispatch (and recovery) in case of unplanned
events (RTD-CAM)
©2012 Ventyx, An ABB Company
Presentation to ERCOT METF April 26 2012
4
Time Scales of Real-Time Scheduling for Normal
Operation
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Real-time Commitment (RTC)
Schedules fast-start units and transactions
 Produces advisory energy, regulation, reserve and LMP
schedules
 Run every 15 minutes for next 2 ½ hours
 Transactions include hourly and 15 minute transactions
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Real-time Dispatch (RTD)
Schedules energy, regulation and reserves
 Commitment and transactions fixed
 Run every 5 minutes for up to 65 minutes
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©2012 Ventyx, An ABB Company
Presentation to ERCOT METF April 26 2012
5
RTC Time Line
0
1
2
Bids Locked
Bids Locked
1015
RTC
15
3015
External
Transactions00
1015
3015
3015
External Transactions15
External
Transactions15
Energy & Reserve Dispatch
Schedule decision
Schedule Shut-down
Schedules Fixed
Schedules advisory
©2012 Ventyx, An ABB Company
Presentation to ERCOT METF April 26 2012
6
RTD Time Line
:45
:00
:15
:30
:45
:00
:15
RTD
50
RTD
55
RTD
00
RTD
05
RTD
10
RTD
15
©2012 Ventyx, An ABB Company
Presentation to ERCOT METF April 26 2012
7
RTC Overview
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RTC solved using SCUC
Additional inputs: unit initial generation and real-time
network status (from State Estimator)
Schedules Fast Start units and transactions
Hourly transactions must be constant over hour
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Uses AMP to mitigate pricing
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15-minute transactions are scheduled by RTC as regular
resources
If market power determined, base prices used in RTD
Fast-start Management function
©2012 Ventyx, An ABB Company
Presentation to ERCOT METF April 26 2012
8
RTC-AMP
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The Real-Time Commitment - Automatic Mitigation Process
(RTC-AMP) is a real-time mitigation function that executes
every 15 minutes on the quarter hour
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RTC-AMP runs in parallel with RTC to evaluate the effect of
Market Participants real-time bids and applies mitigation
measures as required by market rules
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RTC-AMP can be enabled and disabled by setting RTC-AMP
flag. If the RTC-AMP flag is set to “NO”, both RTC and RTCAMP are identical since there is no mitigation measure
required
©2012 Ventyx, An ABB Company
Presentation to ERCOT METF April 26 2012
9
Fast Start Management
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Allows operations staff to:
Approve/disapprove startup/shutdown decisions of RTC
 Initiate startup or shutdown of fast-start unit
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Finalized commitment schedules are respected by
subsequent RTD and RTC runs
RTC
RTD
FSM
RTD-CAM GT
Commitment
RTCAMP
©2012 Ventyx, An ABB Company
Presentation to ERCOT METF April 26 2012
10
RTD Overview
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Dispatch energy, regulation and reserves from:
Generators
 Internal Dispatchable Load
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Commitments, hourly and 15-minute interchanges are fixed
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5-minute NY-HQ transactions are scheduled by RTD
Uses Security Constrained Economic Dispatch
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Same as SCUC except commitment fixed
©2012 Ventyx, An ABB Company
Presentation to ERCOT METF April 26 2012
11
RTD-CAM (RTD Corrective Action Mode)
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Responds to abnormal system conditions
Short look-ahead for fast basepoint
Execute on demand or periodically after first initiation
RTD-CAM Modes:
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Reserve Pickup, one ten-minute step with 7 minute ramp time
Uses emergency response rate
 If necessary commit 10-min GTs
 With or without network model update
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Basepoint As Soon As Possible, one five-minute step
Use normal response rate
 No Commitments
 Commitment as needed, commit 10-min GT if necessary
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Maximum Generation Pickup, one five-minute step and commit all available 10minute GTs
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Units ramped at maximum rate in selected zones
Re-sequencing Run, two five-minute steps
©2012 Ventyx, An ABB Company
Presentation to ERCOT METF April 26 2012
12
NYISO Market Place Dynamics
Day-Ahead Schedule
Market Close 11am
(Forward Contract)
Day Ahead Market
SCUC
Bid by
5am Day
Before
Real-time Bids/Offers with
DA Commitment
Bid closedone Hour-Ahead
MIS
IS+
Next Hour Transaction by
RTC15 for checkout
SRE/OOM
DNI (initial
value for RTC;
Fix interchange
for RTD
Real-time
Bid Update
10-min and 30-min GTs and
SNTRs Commitment
RTC
RTD
Real Time Market
RTC Solution
for Mitigation
RTCAMP
Finalized
Commitment
Finalized
Commitment
FSM
RTDCAM
Mitigated Realtime Bids
fast start (10-min) GTs and
SNTRs Commitment
EMS initial condition,
contingency, facility limit ,
reserve requirement etc
6 secs
basepoint
by AGC
GEN
Binding and Advisory
Basepoints
EMS
©2012 Ventyx, An ABB Company
Presentation to ERCOT METF April 26 2012
13
Pricing
LMP calculated from the RTD multi-step optimization dispatch
 GTs can set price.
 Separate pricing run where:
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Set GT incremental cost equal to average cost
 Set GT low limit to 0
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Make-whole payment considering start up cost, no-load cost and
energy. Guarantee that each unit gets paid at least its production
cost.
Calculate area reserve and regulation MCPs
Generator reserve costs are zero
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MCP based on lost opportunity cost
Demand curve for reserve and transmission
©2012 Ventyx, An ABB Company
Presentation to ERCOT METF April 26 2012
14
Load and Storage Devices
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Demand-side resources
Can bid synch or non-synch reserves
 If bid synch reserve => zero startup and mingen cost
 If bid non-synch reserve => zero mingen cost
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Pump storage (PS)
No reservoir modeling
 Schedules pumping or generating based on input cost curve
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Fly-Wheel (LESR)
Only supplies regulation – no energy
 Not used if regulation demand curve is non-zero
 Not used in RTD-CAM
 Limits for first interval limited by available energy
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©2012 Ventyx, An ABB Company
Presentation to ERCOT METF April 26 2012
15
Network Constraints
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Models losses
Iterative
Network
Security
Monitor
Network
Constrained Unit
Commitment
©2012 Ventyx, An ABB Company
Presentation to ERCOT METF April 26 2012
16
Summary
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NYISO MMS system includes the following:
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An integrated system to handle various operation issues
Fast-start generation commitment
 Look-ahead dispatches and price signals
 Emergency operation
 Real-time price mitigation
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Rigorous coupling of network security and optimization for
system reliability
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Consistent price setting rules in all markets
©2012 Ventyx, An ABB Company
Presentation to ERCOT METF April 26 2012
17
Thank You
Questions ?
©2012 Ventyx, An ABB Company
Presentation to ERCOT METF April 26 2012
18