Control Center and Data Exchange

Question 1

EMS Codes for DATA Integrity

Answer 1

1. Good (Valid Data)
2. Manually entered by company
3. Telemetry Failure
4. Suspect

Question 2

PJM Comms Systems

Answer 2

a. Uses inter-connected control protocol (ICCP) to link data to all data centers
b. SCADA links to plants using RTU via DNP links
c. ICCP is used to link PJM information with control centers

EMS DATA Exchange:
1. Data cycles fast (2S) to produce ACE and ME values
2. Max of 2% inaccuracy allowed. Collects data from CT/PT and transducers. Hourly readings must reporting for billing.