Transcript Volt Var Optimization Pilot Deployment and

Volt Var Optimization Pilot
Deployment and Evaluation at PG&E
September 21, 2015
Agenda
• Introductions
• PG&E VVO Pilot Background and Plan
• Phase 1 Deployment
• Phase 2 Deployment and Monitoring
• Summary and Q&A
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Introductions
Rustom Dessai, P.E.
Expert Specialist
EDSO Emerging Grid Technology
Pacific Gas & Electric
Andrew Hanson, P.E., Ph. D.
Senior Manager
Accenture Smart Grid Services –
Grid Operations and Automation
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Agenda
• Introductions
• PG&E VVO Pilot Background and Plan
• Phase 1 Deployment
• Phase 2 Deployment and Monitoring
• Summary and Q&A
Copyright © 2015 Accenture All rights reserved. Confidential and Proprietary.
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PG&E Smart Grid VVO Background
Pacific Gas and Electric (PG&E) received approval from the California Public
Utilities Commission to execute a VVO pilot project under CPUC Order A 4227-E
with the purpose to “improve overall efficiency, reliability, and cost-effectiveness
of electrical system operations, planning, and maintenance” as stated in
California SB 17.
The VVO pilot is intended to demonstrate capabilities that will contribute to the
goals outlined in California SB 17, through:
• Reduced Energy Use
• Reduced Peak Demand
• Reduced System Losses
Additionally, VVO may provide a number of indirect benefits including:
• Distributed Energy Resource Integration
Accommodation
• Improved Power Quality
• Maintenance Efficiency Improvement / Equipment
Failure Notification
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VVO Technology Overview
•
VVO incorporates sensing, communications and computing to more tightly control voltage
delivered to customers
•
Reducing voltage drives energy efficiency through Conservation Voltage Reduction
(CVR) – reducing delivered voltage reduces energy consumption without
sacrificing device/appliance performance & customer satisfaction
Has the promise to deliver:
• 1-2% reduction in energy demand and consumption
• Improved voltage control on circuits with high DG penetration
•
Substation LTC
Line Regulator
Line Capacitor
Customer
Load
Distributed
Generation
126V
Original
Voltage
120V
Voltage
with
VVO
114V
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Phase 1 – Goals and Objectives
• Assess available Volt/VAR optimization systems to identify solutions
meeting PG&E’s needs
• Identify the technology requirements necessary to support Volt/VAR
optimization system implementation
• In a laboratory environment, test the selected Volt/VAR optimization
systems and devices and identify the specific solution and
supporting technologies to use for the field pilot.
• Perform a benefits assessment that will be used to support a
recommendation to proceed to Phase 2 (the field trial stage of the
pilot project)
RFI and
Benchmarking
Business
Reqs
Test Cases
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Test Harness
Design
Test
Procedures
Test Results
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Phase 2 – Goals and Objectives
• Deploy in field setting to support development of engineering, processes
and procedures that may support larger scale rollout
• Evaluate volt/var optimization platform performance in field settings across
circuits with a variety of characteristics (e.g. length, customer class, loading,
etc.)
• Identify potential “circuit conditioning” actions that may improve functionality
of volt/var solutions (e.g. phase balancing, low voltage remediation, etc.)
• Collect data to support refinement of potential wide scale deployment
benefits forecast
Field
Deployment
IT Readiness
Pilot
Operation
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Meas. &
Verification
Conditioning
Results
Reporting
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High-Level Target VVO Pilot Timeline
2014
2015
Q4
Q1
Base
Testing
Q2
2016
Q3
Q4
Q1
Q2
Q3
Q4
Additional testing to evaluate major vendor upgrades and changes to
ecosystem (e.g., controller upgrades)
Advice Letter
Engineering
& Estimating
Field Const
IT Design & Build
Operate VVO
VVO
Go
Live
Circuit
Conditioning
(e.g, Phase
Balancing)
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Project
Closeout
Report
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Agenda
• Introductions
• PG&E VVO Pilot Background and Plan
• Phase 1 Deployment
• Phase 2 Deployment and Monitoring
• Summary and Q&A
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DTY and Test Harness
• PG&E utilized the distribution test yard (DTY) to simulate circuit responses to VVO
operation, allowing evaluation of vendor solution performance prior to field
deployment.
Network Model
Test VVO
SCADA
Distribution Test Yard
UIQ System
Meter Simulator
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AMI Head End
Meter Farm
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Testing Methodology
• Each Test Case assigned a priority (priority 1 tests are based on safety and
reliability requirements)
• Each test has specific pass criteria, but they often include the following
requirements:
• Maintain voltage and power factor compliance
• Notify Operator of any issues
• Maintain Operator control of VVO
• Return all field devices to local control if VVO disables
• Each Test Case has an associated Test Procedure and initial settings file for
simulation engine
• Tester follows the test procedure, noting significant events and completion
criteria
• Defects for any tests are logged
• All CYME data from tests are saved for further analysis (see next slide for
details)
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Data Captured from Tests
•
•
•
•
•
•
•
•
•
•
•
Voltages at all capacitors
Voltage, voltage angle, current and current angle for LTC, station meter, circuit
breakers, reclosers, regulators, and interconnection switch statuses
Voltage at LVMs
Capacitor status (on or off) for capacitors
Breaker, recloser and interconnection switch status
Regulator and LTC position for all regulating devices
Voltage of all nodes in the model
LTC power factor and a list of all nodes that are above high voltage threshold
or below low voltage threshold for each load iteration
Voltage at all of the spot load locations (transformers)
Incremental loading file for each test case
Initial setting conditions for each test case
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Anatomy of Test Case –
Sustained Outage at Circuit Breaker with SCADA
Business
Req
• Adapt to changing field conditions
• VVO solution continues CVR operation without voltage violations (or disengages) and
alarms for switching done automatically via FLISR or communicated via SCADA
• Sustained Outage at Circuit Breaker with SCADA
Test Case
Test
Harness
Test
Results
Defect
Resolution
• Created ability to simulate fault conditions in the DTY and have actual substation
breaker relays trip and communicate their operations via SCADA to the VVO solution
• Initial failure of test: neither disengaging or alarming for sustained outage at circuit
breaker with SCADA as expected
• Defect logged and shared with vendor
• Vendor patches software for defect
• Regression test completed confirming that patch was successful
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Agenda
• Introductions
• PG&E VVO Pilot Background and Plan
• Phase 1 Deployment
• Phase 2 Deployment and Monitoring
• Summary and Q&A
Copyright © 2015 Accenture All rights reserved. Confidential and Proprietary.
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Circuit Selection and Deployment
Feeder selection criteria developed to identify a population of feeders
with attractive characteristics for the Phase 2 field deployment. Factors
considered in selection of test feeders include:
•
•
•
•
•
•
•
•
•
•
Geographic Proximity (Central Valley Region)
SCADA Availability Required
Feeder Loading Variation
Feeder Length Variation
Customer Classification Mix
Loading Characteristics Mix (Load Factor, balance, DG
penetration)
Communication Coverage
No Planned Disruptive Modifications
Local Knowledge (Avoid Sensitive Customers)
Testing Parity for Vendors
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Circuit Selection and Deployment
Twelve circuits from four substation LTC banks selected:
Airways Bank 1
Barton Bank 3
Pinedale Bank 1
Woodward Bank 2
Upgrades to facilitate VVO included
Capacitor bank controllers
LTC Controllers
Voltage Regulator controls
Line Voltage Monitors
LTC Upgrades
Line Regulator
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Line Voltage Monitor
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Smart Meter Monitoring
SmartMeter voltage data on targeted pilot feeders collected since January
2014. This data is being analyzed to understand:
– Magnitude of available voltage and energy reductions
– Opportunities to modify feeders to enhance VVO benefits
– Opportunities to modify specific service point locations to enhance VVO benefits
– Required modifications to optimize SmartMeter polling and data availability to
enable VVO
– Effects of DG on the VVO circuits
SmartMeter voltage data is used to:
– Understand operational impacts on customer voltages, and to ensure there are
no unintended impacts to proper system voltage levels.
– Improve VVO performance and understand VVO effectiveness in flattening and
reducing voltage profiles including to refine assumptions about service
transformer and secondary voltage drops to more accurately forecast benefits
that may be associated with a broader deployment.
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Performance Analysis Tool
Overview
 Data and dashboards
designed by VVO team to
analyze SCADA and
SmartMeter data using
Tableau, PI, and Excel
 Combines data from
multiple sources including:
SCADA, UIQ, CEDSA, CC&B,
ENOS, and DMS
 Continually evolving based
on user input and field
needs
Current Uses
 Real time visibility into
equipment operation and
VVO status (enable/disable)
 Proactive identification of
issues
 Analysis of equipment
health based on historic data
 Analyze settings and effects
of VVO
 Speeds up troubleshooting
 Avoids truck rolls for spot
checks and RVMs
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Future
 Integrated into one
enterprise tool
 Use beyond just VVO
feeders for compliance,
planning, and
troubleshooting
 Integrated with GIS
equipment maps
 Automated reporting and
alarming on non-VVO
feeders
 More real-time data
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PI Monitoring
• Visibility uncovers issues previously undetected
• VVO creating logic, calculations, and email notifications using PI data
Limit
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Tableau SmartMeter Voltage Analysis
• First automated tool at
PG&E to help engineers
analyze and visualize
SmartMeter voltages
• Geospatial maps combined
with trending and tables
• Uncovers issues proactively
before customers call in
• SmartMeter voltage data
overcomes deficiencies of
SCADA data by including
the effects of the secondary
system on customer
voltages
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Issue Identification and Resolution
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Secondary Voltage Conditioning
• Compliments Existing SG Pilots:
–
–
–
–
Relief of VVO customer voltage constraints
Management / accommodation of distributed resource impacts
Secondary monitoring points to supplement/improve VVO accuracy
Allow piloting of control / impact of secondary conditioning
• Multiple Potential Secondary Voltage Conditioning Platforms
– “Traditional” System Upgrades (Transformer, secondary changeouts)
– Secondary Conditioning Devices (e.g. GridCo, Varantec type devices)
– Smart Inverters (PV installations)
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Staged Integration of VVO and Smart Inverters
Phase 1 – No Control, Real Power Monitoring
• VVO communicates with “conventional” (unity PF) Smart Inverters (SIs) to
read only the real power output, but have no control.
Phase 2 – No Control, Settings and Power Monitoring
• VVO communicates with “smart” (Volt-VAR or PF set) SIs to know SI settings
and the real and reactive power outputs, but have no control
Unknown: What will VVO be allowed to control in the field?
Phase 3 – Pre-Scheduled Control, Settings and Power Monitoring
• VVO communicates with SIs to know the real and reactive power outputs,
and can change the SI settings infrequently on a pre-scheduled basis
Phase 4 – Dynamic Control, Settings and Power Monitoring
• VVO communicates with SIs to know the real and reactive power outputs,
and can change the SI settings dynamically based on conditions
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Agenda
• Introductions
• PG&E VVO Pilot Background and Plan
• Vendor Selection
• Phase 1 Deployment
• Phase 2 Deployment and Monitoring
• Summary and Q&A
Copyright © 2015 Accenture All rights reserved. Confidential and Proprietary.
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