Capacity Shortage Warnings

Question 1

How many Capacity Shortage Warnings are there, and what are they?

Answer 1

There are 3 Capacity Shortage Warnings:

1. Primary Reserve Warning
2. Voltage Reduction Warning & Reduction of Non-Critical Plant Load
3. Manual Load Dump Warning

Question 2

What is the purpose of the Primary Reserve Warning?

Answer 2

Warns members that the available Primary Reserve is less than the required Primary Reserve and present operations are becoming critical.

Question 3

What is the trigger for a Primary Reserve Warning?

Answer 3

Issued when the Primary Reserve is less than the Primary Reserve Requirement but greater than the Synchronized Reserve Requirement.

Question 4

What is the purpose of a Voltage Reduction Warning & Reduction of Non-Critical Plant Load?

Answer 4

To inform the Member Companies that the available Synchronized Reserve is less than required and present operations may require a voltage reduction.

Question 5

What is the trigger for a Voltage Reduction Warning & Reduction of Non-Critical Plant Load?

Answer 5

When actual Synchronized Reserve is less than the Synchronized Reserve Requirement.

Question 6

What is the purpose of the Manual Load Dump Warning?

Answer 6

To warn member companies of increasingly critical system conditions that require manually dumping load.

Question 7

What is the trigger for the Manual Load Dump Warning?

Answer 7

When the Primary Reserve is less than the largest operating generating unit or the loss of a transmission facility jeopardizes reliability after all possible measures have been taken to increase reserves.