Performance Monitoring By PURC What We Monitor Generation

Performance Monitoring By PURC

What We Monitor • Generation Performance • Transmission Performance • Distribution Performance

Generation • Generation – Availability factor – Utilisation Factor

Transmission • Transmission – System line in service – System Availability – Losses

Distribution • Quality of Service (Technical) – Service availability – Network Security • Distribution Losses – Technical – Commercial

Distribution (cont’d) • Service Availability – Planned outages • Special load tariff (SLT) customers • Non-Special load tariff (Non-SLT) customers – Unplanned outages • Special load tariff (SLT) customers • Non-Special load tariff (Non-SLT) customers – Outages due to VRA

Percentage Contribution to Outage 80 70 % Contribution to Outage Duration 60 50 Unplanned Planned Due to vra 40 30 20 10 0 ACCRA EAST ACCRA WEST TEMA EASTERN VOLTA WESTERN CENTRAL ASHANTI WEST Regions ASHANTI ECG EAST AVERAGE

Supply Availability

Distribution (cont’d) • Distribution (cont’d) Network Security – Planned Interruptions • Special load tariff (SLT) customers • Non-Special load tariff (Non-SLT) customers – Unplanned outage Interruptions • Special load tariff (SLT) customers • Non-Special load tariff (Non-SLT) customers – Interruptions due to VRA

Percentage Contribution to Interruption 100 90 80 70 60 Uplanned Planned Due to vra 50 40 30 20 10 0 ACCRA EAST ACCRA WEST TEMA EASTERN VOLTA WESTERN CENTRAL ASHANTI WEST ASHANTI ECG EAST AVERAGE

Network Security

Distribution (cont’d) • Losses – Technical – Commercial

Challenges • • • Lack of required staff strength Inability to carry out field monitoring Accuracy of data received from utility Medium of data exchange Mode of communication of analysis of results Adequacy of data demanded/received

Way Forward • Generation efficiencies – Heat rate for thermal generation • Transmission – Redundancies needed – Outages recorded at connection points • Distribution – Finalising performance indices (SAIDI, SAIFI, CAIDI) to be used from next year Distribution.

? ? ? • Anything Else? • Contributions welcome!