CAISO Update

JSIS MeetingMarch, 2015

Infrastructure

• 92 Connected PMUs • 64 Substations• 7 PDCs reporting (BPA, PG&E, SCE, SDG&E,

APS, SRP and NVP)• Redundant PDCs/Servers – 5 PDCs connected

to both sites• Redundant PI servers for real-time historian

Data Management

• Streaming data in C37.118 at 30 frames/sec.• Archiving – PI Historian – 90 Days – 30 f/s – Raw Phasor Data

(redundant, dedicated to synchrophasors only)– PI Historian – Calculated Data – Down-sampled

(redundant production PI Servers/collectives)– Long term storage (less expensive) – Comtrade – 3

years plus all events

Engineering Applications

• Angle Difference - sent to EMS• Backup Frequency Source – sent to EMS• MW Flow – Backup for Tie Line measurement

– sent to EMS• Post-Event Analysis• Dynamic Model validation – DSA model

verification• Benchmarking – comparison to SE for Kv and angle ’s

Control Room Applications

• Phase Angle Difference on EMS one-line displays

• Island Detection• Frequency Event Detection• Event analysis/locator (Future)• Oscillation detection (Future)

Expectations from WISP, JSIS, NASPI

• Data availability and quality information, support with PMU issues

• Exchange of tools and applications• Exchange of lessons learned– Installations, applications, data management, etc.