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Ocean Outfall System Rehabilitation and SCADA System and Network Upgrades,
Project Nos. J-117 and P2-107, Items 9, 10 and 11
Mike Dorman
Engineering Manager
March 7, 2018
Agenda Items 9, 10 and 11
• Item 9: Increase contingency for SCADA System and Network Upgrades, Project No. P2-107
• Item 10: Combine Ocean Outfall System Rehabilitation, Project No. J-117, and SCADA System and Network Upgrades, Project No. P2-107
• Item 11: Sole source electrical power system protective relays and load-shedding systems at Plant Nos. 1 and 2
P2-107 Project Elements
Medium-Voltage Switchgear
Low-Voltage Switchgear
Medium-Voltage Switchgear• Monitoring and control
all breakers• Automatic transfer
schemes• Power monitoring• Replace protective relays
Low-Voltage Switchgear• Monitoring and control
main and tie breakers• Automatic transfer
schemes• Power monitoring
Replace ObsoleteElectromechanicalProtective Relays
P2-107 Project Elements
Uninterruptible Power Supply (UPS)
Standby Generator
Project Elements (Cont.)• Monitor Status and Alarms
• Battery chargers• Fuel systems• Generators• Grounding systems• Transformers• Uninterruptible power
supplies (UPS)• Load Shedding System• Network
12kV-480V Transformer
Battery Charger
Gas Compressors/Primary Effluent
Pump Station
DRY WEATHER WET WEATHER
TOTAL LOAD 7 MW 10-13 MW
CEN GEN CAPACITY 4-6 MW 9 MW
POWER IMPORTED 1-3 MW 1-4 MWCEN GEN OVERLOADED ON
UTILITY POWER OUTAGE
NON-CRITICAL
LOAD
LOADS WITH
STANDBY POWER
(TYPICAL)
PARTIAL TRIPPING
OF DOWNSTREAM
LOADS (TYPICAL)
1
Central Generators(5) 3 MW, (1) 1 MW
2 3 4 5 6
Utility
Headworks
Primary Clarifiers
Trickling Filters
Ocean OutfallPump Station
EffluentPump Station
Annex
Activated Sludge
Digesters
Centrifuges
City WaterPump Station
PLANT PRIMARY POWER SOURCES
StandbyGenerators
StandbyGenerators
StandbyGenerators
StandbyGenerators
LOAD SHEDDING METHODS:
• CONTINGENCY BASED (EVENT DRIVEN)
• BACKUP FREQUENCY
Load Shedding System
“Clear” the Arc Flash condition “faster”
REDUCE ARC-FLASH ENERGY
• VIRTUAL MAIN
• ARC-FLASH PROTECTION
Methods to Reduce Arc Flash Levels
Adopting Latest Substation Technology LOAD SHEDDING CONTROLLER
VIRTUAL MAIN
GOOSE
MESSAGING
ARC-FLASH
PROTECTION
ADOPTING THE LATEST
SUBSTATION AUTOMATION
TECHNOLOGY: IEC 61850 WITH
GENERIC OBJECT ORIENTED
SUBSTATION EVENT
MEDIUM-VOLTAGE SWITCHGEAR
12KV-480V TRANSFORMER
LOW-VOLTAGE SWITCHGEAR
VIRTUAL MAIN
REDUCES ARC FLASH
Ocean Outfall System Rehabilitation, Project No. J-117
• J-117A Interplant Effluent Pipeline Rehabilitation ($12.6M)
• J-117B Outfall Low Flow Pump Station ($76M)
Ocean Outfall System Rehabilitation, Project No. J-117
OCEAN OUTFALL BOOSTER STATION (OOBS) REHAB
NON-RECLAIMABLE FLOWSRECLAIMABLE FLOWS
REPLACE EXISTING PLANT WATER PUMP STATION
PLANT WATER PS
LOW FLOW PS
REPLACE CEN GEN ELECTRICAL
J-117B is on critical path for GWRS Final Expansion startup
Plant 2 - 12kV Electrical System
CENTRAL GENERATION SWITCHGEAR
DISTRIBUTION CENTER C (OOBS)
Bus A
Bus A
12KV SERVICE CENTER
Bus A
Bus B
Bus G1 Bus G1 Bus B
Bus B
EFFLUENT PUMP STATION ANNEXBus A Bus B
DC ‘B’ (ACTIVATED SLUDGE)
Bus A
DC ‘H’ (HEADWORKS)Bus A Bus B
Bus B
DC ‘J’ (TRICKLING FILTERS)Bus A
DC ‘K’ (CENTRIFUGE)Bus A Bus B
Bus B
J-117B
P2-107
P2-107
SWITCHGEAR WITH LOAD SHEDDING
Other Benefits of Combining Projects: Similar work, IT room in OOBS, concurrent schedule, and reduced soft costs.
12kV Service Center
Distr Ctr J
Dist Ctr H
12kV Dist Ctr C
Cen Gen
EPSA Standby Power
HW Standby Power
Dist Ctr A
EPSA Elect
Bldg
Dist Ctr B
Power Bldg B
Power Bldg C
City Water PS
RAS East
RAS West
DAF
J-117B and P2-107 Plant 2 Site Plan
OPS Center
SCADA System and Network Upgrades P2-107 Contingency Increase – Item 9
• Design a microprocessor-based load-shedding system
• Develop new guidelines for the monitoring and control signals associated power monitoring/control
• Revise programmable logic controller standard drawings
• Add fire protection to the Centrifuge Building server room
Recommendations – Item 9
• Approve a contingency increase of $211,365 (7.5%) to the Professional Design Services Agreement with Brown and Caldwell for SCADA System and Network Upgrades, Project No. P2-107, for a total contingency amount of $493,185 (17.5%).
Recommendations – Item 10
• Approve a budget increase of $19,000,000 for Ocean Outfall System Rehabilitation, Project No. J-117, for a total budget amount of $166,000,000; and
• Approve a budget reduction of $19,100,000 for SCADA System and Network Upgrades, Project No. P2-107 for a total budget amount of $5,000,000.
Load Shedding Sole Source
• Request for Information Sent to 5 Vendors• Asea Brown Boveri (ABB)
• General Electric (GE)
• Schneider Electric
• Schweitzer Engineering Laboratories (SEL)
• Siemens
• 4 out of 5 responded
Load Shedding Sole Source (Cont.)
Load-Shedding Criteria ABB GE SEL Siemens
Complies with Substation Automation Standard (IEC 61850, Edition 1 or 2)
✓ ✓ ✓ ✓
Microprocessor-based controller ✓ ✓ ✓
Industry standard programming language (IEC 61131 )
✓ ✓ ✓
Contingency-driven load shedding ✓ ✓ ✓ ✓
Load shedding works with other mfrs ✓ ✓ ✓
Redundant Communication ✓ ✓ ✓ ✓
Load Shedding Sole Source (Cont.)Criteria ABB SEL
Projects in the US 1 7
Offices in the US 1 (Texas) 14 (1 in Irvine)
Technical Staff in US 2 100
Load Shedding Timing 98 msec 12.24 – 30.46 msec
Recommend sole sourcing SEL• Uses industry standard programming languages• Microprocessor-based controller• Fast load-shedding timing coordinates with backup frequency load shedding• Installations in the United States• Local customer support for current and future OCSD projects
Also, reduced staff training and less spare parts
Recommendations – Item 11• Authorize staff to specify Schweitzer Engineering Laboratories as
the sole source provider for current and future projects equipment, materials, and services for electrical power system protective relays and load-shedding systems at Plant Nos. 1 and 2; and
• Authorize staff to negotiate service agreements for services related to protective relays and load-shedding systems for current and future projects, and for on-going operations and maintenance at Plant Nos. 1 and 2; and
• Ratify the addition of Schweitzer Engineering Laboratories to the list of pre-approved Original Equipment Manufacturers for procurements under $100,000 for equipment, materials, and services for electrical power system protective relays and load-shedding systems.
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