Tech Requirements Flashcards
Was there any change in frequency versus time requirements from the 2006 code and 2024 code?
No
Frequency range for continuous operation and rated output/pf.
By Grid Code - 49-51 Hz
NC RfG requires down to 47.5 for 30 min
2% of 50 Hz
1 Hz
How do the Grid Code frequency requirements for STG compare to WEC’s?
Much more stringent than WEC’s.
What if the required power factor profile called?
Q over Pmax versus voltage curve
What Section is “Technical requirements and recommendations for equipment….”
3.3
What is active power primary control?
Normal governor load-frequency control.
What is the function of active power tertiary control?
To control various generators in the best possible way, in terms of economic considerations.
What is the function of active power secondary control?
To restore the SYSTEM FREQUENCY to its set-point value.
How fast is primary control?
a few seconds
After a frequency disturbance, is the frequency of the system returned to normal?
No. The frequency stabilizes but differs from the frequency set-point because of the DROOP OF THE GENERATORS.
How fast is secondary control?
15 to 30 seconds
How is secondary control achieved?
Generally automatic
How is tertiary control achieved?
Central dispatch
What is the range for required primary control.
± 5% of Pmax
What is “aFRR”?
automatic Frequency Restoration Reserve
Synonym for aFRR?
Secondary Reserve
Physically, what are the primary and secondary controllers?
primary controls - the governors on the turbines
secondary controls - the supervisory computer systems
What is the ARNE system?
Automatic voltage and reactive power control using AVR of generator and collaborating with master system ARST
What is the ARST system?
Automatic voltage control system as a master for ARNE and using on-load tap changer of transformer
What is SORN?
Area voltage control system for remote supervision ARNE and ARST
What is section 3.8?
3.8. Technical requirements for existing PGMs
What is Section 4?
TECHNICAL REQUIREMENTS FOR ANCILLARY INFRASTRUCTURE
What is the WIRE system?
energy market information exchange system
What is FCR?
Frequency Containment Reserve
Grid-level algorithm for frequncy control
What is FRR?
frequency restoration reserves
Difference between FCR and FRR?
ICT?
data transmission and information exchange
Reg 2196?
aka - NC ER
Network Code on Emergency Restoration
What is SOWE (sova) system?
operational cooperation system with balancing service providers (SOWE) – dedicated to exchange operational and planning information
What is MBS?
Metering and Billing System
BMU?
balancing mechanism unit
Description of BMU.
the smallest grouping that can be independently controlled
What is Section 3.3.1?
Tech Requirements for PGMs Connected at 110 kV or higher
What is Section 3.6?
Technical requirements for active power control
What does IRESP and NCRfG say about LFSM?
Nothing that I have found.
