WECC Reliability Coordinators WECC Reliability Coordination - - PowerPoint PPT Presentation

WECC Reliability Coordination Familiarization

WECC Reliability Coordinators

Glossary of Terms

WECC – Western Electricity Coordinating Council Formed 14 August 1967 WECC continues to be responsible for coordinating and promoting electric system reliability. NERC - Since 1968, the North American Electric Reliability Corporation (NERC) has been committed to ensuring the reliability of the bulk power system in North America. FERC – Federal Energy Regulatory Commission EHV – Extra High Voltage ≥ 345 kV

• Extreme COLD weather
• I nadequate Energy Resources
• I nsufficient Fuel (Deliveries hampered)

January 1994 Eastern I nterconnection experienced significant power outages (including WASHI NGTON DC…) After-the-Fact investigations revealed:

• There were resources available in the Midwest, but…
• Frequency was low, but…

Not everybody knew Why!

I NADEQUATE COMMUNI CATI ON!

1994 - NERC Blue Ribbon Task Force commissioned, which recommended creation of the NERC Security Process Task Force (SPTF).

RELIABILITY COORDINATION

1996 – NERC SPTF Recommended Creating Regional Reliability Plan for EACH region in NERC!

RELIABILITY COORDINATION

Eastern Interconnection Western Interconnection ERCOT

8 NERC Reliability Entities

“WECC”

Largest of the 8 NERC Regions

(1.8 million square miles)

14 Western states, 2 Canadian provinces, 1 Mexican state (Portion) 153 member systems 33 Control Areas 71 million people

• Peak Demand

(S) 125,040 MW (W) 114,680 MW

• Generation

169,208 MW

• Transmission

115,743 Circuit Miles

Stats based on 2001 data

35 Balancing Authorities (BAs)

1996 – WECC experiences I nterconnection break up!

(July 2 and August 10)

RELIABILITY COORDINATION

January 1997 WECC Security Process Task Force published the Regional Reliability Plan.

CMRC (CI SO) PNSC (BPA) RDRC (WACM)

RELIABILITY COORDINATION

• Implementation of the WECC EHV Data Pool
• Approved by WECC BOT December 1997, and implemented
• n January 1, 1998.
• Created Regional Reliability Coordinators in each of the three

(3) WECC Sub regions

Rocky Mtn. (WAPA) Desert SW (APS) MAY 1999 COMBI NED Rocky Mtn. (WAPA) Desert SW (APS)

I NDEPENDENCE The Reliability Coordinator Serves the interest of the Interconnection. Acts in the interests of the overall Interconnection before any other entity (Control Area, etc.).

Three (3) Sub-Regions

Pacific Northwest (PNSC) California/Mexico (CMRC) Rocky Mountain/Desert Southwest (RDRC)

CMRC

RELIABILITY COORDINATOR AREAS

RDRC PNSC

38% 26% 36% LOAD 33% 22% 45% GENERATION 23% 23% 54% TRANSMISSION

(Circuit Miles)

RELIABILITY COORDINATION

• FREQUENCY

– Reliable Sources – Key Points in the System

Voltage Generation Frequency

WECC EHV Data Pool

• VOLTAGE

– 500 kV – 345 kV – 230 kV

• GENERATION

– > 200 MW

Voltage Frequency Generation

FIGURE 2

EXISTING WSCC KEY TRANSMISSION LINES & PATHS

345 KV

500 KV

KEY TRANSFER PATHS

• SCHEDULES

WECC EHV Data Pool

• LIMITS
• ACTUALS

Responsibilities (NERC Policy 9; Appendix 9B)

• Planning for next-day operations, including reliability analyses and

identifying special operating procedures that might be needed.

• Analyzing current day operating conditions,
• Adequate Resources (RESERVES)
• I mplementing I NTERCONNECTI ON-wide relief procedure

(TLR- Eastern & USF-WECC), or local procedures to mitigate overloads

• n the transmission system.
• Notification.

Interconnection facility status, “Energy Emergency Alert Levels.”

• Provide Coordination & Direction during restoration efforts

impacting the I nterconnection.

RELIABILITY COORDINATION

Authority to provide emergency assistance.

• Each RELIABILITY COORDINATOR must have the authority to take or

direct whatever action is needed to mitigate an energy emergency within their Reliability Area. I NDEPENDENCE - STANDARDS OF CONDUCT – CONFI DENTI ALI TY The Reliability Coordinator Serves the interest of Reliability Area and Interconnection. Must act in the interests of the reliability of the overall Reliability Area / Interconnection before any other entity (Control Area, Purchasing-Selling Entity, etc.).

• WECC EHV Data Pool –10 to 60 second refresh rate
• EMS / SCADA Systems –10 second scan rate
• WAMS –Wide Area Monitoring System / Phasor

Measurement System 0.05 second scan rate

• PI Displays & Data Historian (65,000 ICCP)
• State Estimator Model (1Min)
• Contingency Analysis (5 Min)
• Voltage Stability / VAR Management
• Real Time Dynamic Stability Analysis

Tools to Monitor the WECC System

RELIABILITY COORDINATION

Electric System Security Data

• Transmission data.
• Status
• MW or ampere loadings
• MVA capability
• Transformer tap and phase angle settings
• Key voltages
• Generator data.
• Status
• MW and MVAR capability
• MW and MVAR net output
• Status of automatic voltage control facilities
• Operating reserve
• CONTROL AREA Demand
• Interchange (Scheduled and Actual)
• Area Control Error (ACE) and Frequency

Operational I nformation

Frequency Disturbances and Excursions

• 1.782

System Voltage

WECC EHV SYSTEM VOLTAGES

Regional Perspective

Big Picture Perspective Operating Reserves Key Transfer paths

Conclusion

RELIABILITY COORDINATION

What do Reliability Coordinators do?

Monitor & Analyze:

• Reliability “Health of the system”
• Established NERC & WECC

Criteria (Rules)

• Evaluate
• Predict
• and COMMUNICATE.

Questions

RELIABILITY COORDINATION