GAA Performance Summary

This field is disabled and is populated automatically when the value in the Reporting Status field is set to Unit Level Approval, validation is performed on this field to ensure that the value is equal to the number of Attempted Unit Starts minus the number of Startup Failures.

This field is required.

This field is disabled and is populated automatically when the value in the Reporting Status field is set to Unit Level Approval, validation is performed on this field to ensure that the value is equal to the number of outage events that occurred within the month that the Performance record represents.

This field is required.

Indicates the total number of hours in which the unit was available.

This field is disabled and populated automatically as the sum of Pumping Hours, Reserve Shutdown Hours (RSH), Service Hours (SH), and Synchronous Condensing Hours.

This field is required.

This value is defined by NERC in the GADS DRI and included in NERC performance reports.

This field is disabled and populated automatically using the following formula:

(Available Hours / Period Hours) × 100%

This value is defined by NERC in the GADS DRI.

This field is disabled and populated automatically using the following formula:

(Service Hours / Actual Unit Starts ) × 100%

This value is defined by NERC in the GADS DRI.

Extension of Scheduled Outage Hours

Indicates the number of hours that the unit was scheduled to be inactive.

This field is disabled and populated automatically as the sum of Planned Extension Outage Hours and Maintenance Extension Outage Hours.

This field is required.

This field is disabled and populated automatically as the sum of all hours experienced during Forced Outages (U1, U2, U3) and Startup Failures (SF).

This field is required.

This field is disabled and populated automatically using the following formula:

(Forced Outage Hours / Period Hours) × 100%

This value is defined by NERC in the GADS DRI.

This field is disabled and populated automatically using the following formula:

[Forced Outage Hours / ∑ (Service Hours + Synchronous Hours + Pumping Hours)] × 100%

This value is defined by NERC in the GADS DRI.

This field is disabled and populated automatically using the following formula:

[Forced Outage Hours Demand / (Σ Forced Outage Hours Demand + Service Hours)] × 100%

This value is defined by NERC in the GADS DRI.

Indicates the actual gross generation of the unit during the month for which the Performance record stores generation data.

This field is disabled and populated automatically using the following formula:

Gross Actual Generation = Max Generation (G) - Unavailable Generation

Where,

• Max Generation (G) = Period Hours × Gross Max Capacity
• Unavailable Generation = ∑(All Outage hours + All Equivalent Derate hours + All Reserve Shutdown hours) × Gross Max Capacity

This field is used to calculate the value in the Gross Generation of Electricity field in the GAA Fuel Report records that are linked to the Performance record.

This field accepts both positive and negative numbers. In some cases, if a unit does not produce power during the month, the equipment in the plant still consumes power, causing a negative Gross Actual Generation value.

This field becomes required when the value in the Reporting Status field is set to Unit Level Approval.

This value is defined by NERC in the GADS DRI and included in NERC performance reports.

This field is populated automatically with the value in the Gross Dependable Capacity field in the Unit Capacity record for a GAA Unit based on the start date of the Performance record.

This value is defined by NERC in the GADS DRI and included in NERC performance reports.

If you modify the value in this field, a validation message appears indicating that the pumping hours or capacity values have changed and that the performance calculation is being run.

This field is populated automatically with the value in the Gross Maximum Capacity field in the Unit Capacity record for a GAA Unit based on the start date of the Performance record.

This value is defined by NERC in the GADS DRI and included in NERC performance reports.

If you modify the value in this field, a validation message appears indicating that the pumping hours or capacity values have changed and that the performance calculation is being run.

Indicates the number of hours the unit was inactive during the month for which the Performance record stores generation data.

This field is disabled and populated automatically with the value from the Event Duration field in the Primary Event record that is linked to the Performance record.

This field is populated automatically as the sum of durations of Inactive events (IR, MB, RU).

This field is required.

This value is defined by NERC in the GADS DR.

Indicates the number of hours the unit was inactive due to maintenance outages.

This field is disabled and populated automatically as the sum of all hours that occurred during Maintenance Outages (MO) and Maintenance Outage Extensions (ME) of any Maintenance Outages (MO).

This field is required.

This field is disabled and populated automatically using the following formula:

(Maintenance Outage Hours / Period Hours) × 100%

This value is defined by NERC in the GADS DRI.

Indicates the maximum gross generation that the unit is capable of producing during the month for which the Performance record stores generation data.

This field is disabled and populated automatically using the following formula:

Max Generation (G) = Period Hours × Gross Max Capacity

Indicates the maximum net generation that the unit is capable of producing during the month for which the Performance record stores generation data.

This field is disabled and populated automatically using the following formula:

Max Generation (N) = Period Hours × Net Max Capacity

This field is disabled and populated automatically using the following formula:

Forced Outage Hours which occur from in-service state only / Number of Forced Outages which occur from in-service state only

This value is defined by NERC in the GADS DRI.

This field is disabled and populated automatically using the following formula:

Forced Outage Hours which occur from in-service state only / Number of Maintenance Outages which occur from in-service state only

This value is defined by NERC in the GADS DRI.

This field is disabled and populated automatically using the following formula:

Planned Outage Hours which occur from in-service state only / Number of Planned Outages which occur from in-service state only

This value is defined by NERC in the GADS DRI.

This field is disabled and populated automatically using the following formula:

Service Hours / Number of (Unplanned) Forced Outages which occur from in-service state only

This value is defined by NERC in the GADS DRI.

This field is disabled and populated automatically using the following formula:

Service Hours / Number of Maintenance Outages which occur from in-service state only

This value is defined by NERC in the GADS DRI.

This field is disabled and populated automatically using the following formula:

Service Hours / Number of Planned Outages which occur from in-service state only

This value is defined by NERC in the GADS DRI.

This field is disabled and populated automatically using the following formula:

Service Hours / Number of Unplanned Outages which occur from in-service state only

This value is defined by NERC in the GADS DRI.

This field is disabled and populated automatically using the following formula:

Unplanned Outage Hours which occur from in-service state only / Number of Unplanned Outages which occur from in-service state only

This value is defined by NERC in the GADS DRI.

Indicates the actual net generation of the unit during the month for which the Performance record stores generation data.

This field is disabled and populated automatically using the following formula:

Net Actual Generation = Max Generation (N) - Unavailable Generation

Where,

• Max Generation (N) = Period Hours × Net Max Capacity
• Unavailable Generation = ∑(All Outage hours + All Equivalent Derate hours + All Reserve Shutdown hours) × Net Max Capacity

This field is used to calculate the value in the Net Generation of Electricity field in the Generation Fuel Report records that are linked to the Performance record.

This field accepts both positive and negative numbers. In some cases, if a unit does not produce power during the month, the equipment in the plant still consumes power, causing a negative Net Actual Generation value.

This field becomes required when the value in the Reporting Status field is set to Unit Level Approval.

This value is defined by NERC in the GADS DRI and included in NERC performance reports.

Indicates the net dependable capacity of the unit.

This field is populated automatically with the value in the Net Dependable Capacity field in the Unit Capacity record for a GAA Unit based on the start date of the Performance record.

This field is required.

This value is defined by NERC in the GADS DRI and included in NERC performance reports.

If you modify the value in this field, a validation message appears indicating that the pumping hours or capacity values have changed and that the performance calculation is being run.

This field is populated automatically with the value in the Net Maximum Capacity field in the Unit Capacity record for a GAA Unit based on the start date of the Performance record.

This field is required.

This value is defined by NERC in the GADS DRI and included in NERC performance reports.

If you modify the value in this field, a validation message appears indicating that the pumping hours or capacity values have changed and that the performance calculation is being run.

Number of Non Curtailing Events

Indicates the number of Non Curtailing events that occur in a Unit during the specified month.

This field is disabled and populated automatically when each time an Event occurs with value in the Capacity Event Type field specified as NC (Noncurtailing Event), this field is incremented by 1.

This field is disabled and populated automatically. The value in this field is equal to the sum of the values in the Available Hours field and Unavailable Hrs field.

This field is required.

Indicates the number of hours the unit was inactive due to planned outages.

This field is disabled and populated automatically as the sum of all hours experienced during Planned Outages (PO) and Planned Outage Extensions (PE) of any Planned Outages (PO).

This field is required.

This field is disabled and populated automatically using the following formula:

(Planned Outage Hours / Period Hours ) × 100%

This value is defined by NERC in the GADS DRI.

This field is disabled and populated automatically with the value in the Primary Unit Code field in the GAA Unit record that is linked to a Performance record.

This field is required.

This value is defined by NERC in the GADS DRI and included in NERC performance reports.

This field is disabled and populated automatically with the value in the Primary Utility Code field in the GAA Unit record.

This field is required.

This value is defined by NERC in the GADS DRI and included in NERC performance reports.

This field is enabled in Performance records that contain the value Pumped Storage/Hydro in the Unit Type field. You can enter a value in this field manually.

This field is required.

This value is defined by NERC in the GADS DRI.

If you modify the value in this field, a validation message appears indicating that the pumping hours or capacity values have changed and that the performance calculation is being run.

This field is populated automatically with the date when the record was created.

This field is disabled when the Performance record is in the Approved state.

This field is required.

The combination of the value in this field and the Reporting Year field represents a unique year and month combination. You can create only one record with this combination for a particular type of Performance.

This field is disabled and populated automatically with the month when the record was created.

This value is included in NERC performance reports.

Indicates the year that the Performance record represents.

The combination of the value in this field and the Reporting Month field represents a unique year and month combination. You can create only one record with this combination for a particular type of Performance.

This field is disabled and populated automatically with the year of the created record.

This value is included in NERC performance reports.

This field is disabled and populated automatically as the sum of all hours the unit was not in service.

This field is required.

You must increment this number each time you resubmit a report which includes information in the Performance record to NERC or CEA.

This value is defined by NERC in the GADS DRI.

This field is disabled and populated automatically with the sum of all hours experienced during Planned Outages (PO), Maintenance Outages (MO), and Scheduled Outage Extensions (PE and ME) of any Maintenance Outages (MO) and Planned Outages (PO).

This value is defined by NERC in the GADS DRI.

This field is disabled and populated automatically using the following formula:

(Scheduled Outage Hours / Period Hours) × 100%

This value is defined by NERC in the GADS DRI.

This field is disabled and populated automatically using the following formula:

(Service Hours / Period Hours) × 100%

This value is defined by NERC in the GADS DRI.

Indicates the starting reliability of the unit.

This field is disabled and populated automatically using the following formula:

(Actual Unit Starts / Attempted Unit Starts)*100

Indicates the number of hours the unit operated in synchronous condensing mode.

This field is disabled and populated as the sum of durations of Non-Curtailing events when cause code of the event is 9340 Synchronous Condenser Operation.

This value is defined by NERC in the GADS DRI.

Typical Unit Loading Characteristics

This field is populated automatically with the value in the Default Unit Loading field in the GAA Unit record to which the Performance record is linked.

This value is defined by NERC in the GADS DRI.

Indicates the number of hours that the unit was unavailable.

This field is disabled and populated automatically as the sum of the Forced Outage Hours (FOH), Maintenance Outage Hours (MOH), and Planned Outage Hours (POH).

This value is included in NERC performance reports.

This field is disabled and populated automatically using the following formula:

(Unavailable Hours / Period Hours) × 100%

This value is defined by NERC in the GADS DRI.

This field is disabled and populated automatically using the following formula:

(Unplanned Outage Hours / Period Hours ) × 100%

This value is defined by NERC in the GADS DRI.

You can manually enter the description in this field.

When you create a Performance record, you can enter a verbal description of up to 255 characters. When you generate a NERC Performance Report, the verbal description in the generated report will display only the first 50 characters of the description that you entered in the Verbal Description field.