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

Source: NFPA 70E

Arc Flash Event

“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.