Operating Reserve Policy -ORP in Grid Code 2023

The Operating Reserve Policy by National Transmission & Dispatch Company (NTDC), Pakistan is based on grid code 2023 guidelines.

The #Grid #Code 2023 (#GC) discusses operating reserves in multiple sections, specifically within OC 5.4

For Example

• OC 5.4.13: Operating Reserve Policy

Details the methodology to determine the required amounts of primary, secondary, and tertiary operating reserves. It covers factors such as generation infeed, demand control, and forecast uncertainties.

?

• OC 5.4.13.3: Contingency Reserve Quantity

Determination of contingency reserve levels considering factors like generating unit reliability, forecasting uncertainties, and interconnectors.

?

• OC 5.4.14: Responsibilities of the System Operator (SO)

Discusses the SO's responsibilities regarding the management and dispatch of operating reserves, monitoring of frequency response, and ensuring adequate reserves.

?

Summary of Grid Code 2023 guidelines regarding Operating Reserve Policy ORP

• Types of Operating Reserve:

Primary Operating Reserve: This is the initial reserve that responds immediately (within 0-10 seconds) to any frequency deviations.

Secondary Operating Reserve: Engages after primary reserve, with a response time between 5-30 seconds, and is sustained for up to 30 minutes.

Tertiary Operating Reserve: This reserve restores primary and secondary reserves and is used in the time frame from 20 minutes to 4 hours after an event.

Contingency Reserve: This is the margin of available generation capacity over forecast demand, required to cover uncertainties in generation availability and forecast errors. It includes generation plants that are not synchronized but must be available to synchronize with the system when needed.

• Operating Reserve Policy:

The System Operator (SO) determines reserve requirements, including primary, secondary, and tertiary reserves, to ensure system security. The SO must maintain and update a methodology for determining reserve requirements, considering factors like the largest generation infeed, demand control incidents, and ambient weather conditions.

• Responsibilities of SO:

The SO must monitor and dispatch generation to meet reserve requirements and ensure system reliability. The SO can modify dispatch and assign reserves as necessary to maintain system security. The SO should ensure that generators provide the required frequency response and may impose restrictions if they fail to do so.

You can find key points of Operating Reserve Policy by NTDC at Operating Reserve Policy