TECHNICAL PERFORMANCE INDICATORS - Kostt

1 TECHNICAL PERFORMANCE INDICATORS September 2007 Prishtina TABLE OF CONTENTS 1. Introduction .. 2 2. TECHNICAL Key PERFORMANCE INDICATORS .. 3 Output of a TSO .. 3 Transmitted electricity (GWh) .. 3 Coincident Peak demand (MW) .. 6 Length of the lines (km) .. 7 8 Capacity of Transformers .. 8 Fulfillment of Market Request .. 9 Average Available Import/Export capacity (NTC) .. 10 Maximum Available Import/Export capacity (NTC).. 11 Congestion rent .. 11 Quality of the Transmission Function of a TSO: Network 12 Average Interruption Time (AIT) .. 12 Commercial Quality: Voltage and Metering Complaints .. 13 Number of Voltage Complaints .. 13 Number of Voltage Complaints resolved within a specified number of 15 Number of Metering 16 Metering Complaints resolved within a specified number of 16 Quality of System Operation.

2 17 Average absolute deviation of Hourly Import/Export Schedule .. 17 Network Losses .. 18 Network Losses (GWh) .. 19 Internal TECHNICAL PERFORMANCE .. 20 Line/ Cable Failure rate per 100 circuit 20 Average repair time of Line/Cable failures .. 21 Average Outage time due to Line/Cable 21 Transformer Failure rate per 100 Transformers .. 22 Average repair time of Transformer failures .. 22 Average Outage time due to Transformer maintenance .. 23 switchgear Failure rate per 100 24 TECHNICAL PERFORMANCE INDICATORS i Average repair time of switchgear 24 Average Outage time due to switchgear maintenance.

3 25 Control/Protection Failure rate per 100 26 Average repair time of Control/Protection 26 Average Outage time due to Control/Protection maintenance .. 27 TECHNICAL PERFORMANCE INDICATORS ii ABBREVIATIONS AIT - Average Interruption Time ATC - Available Transfer Capacity MATC Maximum Available Transfer Capacity AATC Average Available Transfer Capacity KPI - Key PERFORMANCE indicator NTC - Network Transmission Capacity TSO - Transmission System Operator TS - Transmission System TPI - TECHNICAL PERFORMANCE indicator TECHNICAL PERFORMANCE INDICATORS 1

4 1. Introduction Regard to Article 16 of the License Overall and Minimum Standards of PERFORMANCE of the Transmission Operation Business. TSO is obliged to establish and maintain and monitor compliance with regard to the transmission system PERFORMANCE . Also Article of the Law of Regulator stipulates the tariff methodology shall be based on the principle to establish PERFORMANCE based rates. These INDICATORS measure the reliability of electric power service and reflect operational problems. TECHNICAL PERFORMANCE INDICATORS provide information on standards of PERFORMANCE offered to customers, including the quality of services and security and reliability of supply.

5 The objective of this document is to present the TECHNICAL KPI and which set of data will be needed, which will be presented in the following format: Table 1: Example for the description of selected TECHNICAL KPI Title of KPI N T1 Definition Formula/Data measurement Target . TECHNICAL PERFORMANCE INDICATORS 2 2. TECHNICAL Key PERFORMANCE INDICATORS This chapter provides the definition of the TECHNICAL key PERFORMANCE INDICATORS . TECHNICAL PERFORMANCE INDICATORS (TPIs) focus on PERFORMANCE of the power system operated by Kostt .

6 The Transmission System Operators do have two basic tasks: Transmission Operation and System Operation. Where Transmission Operation has mainly to do with the physical Transmission network, System Operation has to deal with keeping the balance between load and generation. More technically, Transmission Operations has to do with parameters like Voltage, Current, MVA, power factor where System Operations has to do with frequency, MW, load balance etc. Output of a TSO Transmitted electricity (GWh) (section ) and Coincident Peak demand (MW) (section ) are among the most commonly used parameters to describe the output of a TSO. These KPIs are used by virtually all TSOs and are easy to gather by using commercial metering and/or SCADA systems.

7 Moreover, it s easy to define them unambiguously which makes them very suitable for comparing them to other countries and to understand them. Last but not least, these figures directly relate to the income of Kostt , which makes them important Key PERFORMANCE INDICATORS . Also Length of the lines (km) (section ), MVA-km (section ) and Capacity of Transformers (section ) are often used and published by other TSOs and a good reference when comparing other values. Transmitted electricity (GWh) N T1 Transmitted electricity (GWh) Definition TECHNICAL PERFORMANCE INDICATORS 3 The Transmitted electricity is defined as the electricity (in GWh) transmitted to customers during the reporting period through the transmission system operated by the TSO.

8 This includes transmission system losses and export over interconnections. This definition is shown graphically in Figure 1. GGGGT ransmissionDistributionDistribution e nd-usersExportTransmission End-usersLossesImportLossesGGGGT ransmissionDistributionDistribution e nd-usersExportTransmission End-usersLossesImportLossesGGGGGGGGGGGT ransmissionDistributionDistribution e nd-usersExportTransmission End-usersLossesImportLosses Figure 1: Transmitted Electricity should be calculated by adding up all electricity (in GWh) flowing across the dotted line during the reporting period. The value should be equal to generation infeed into the transmission system plus import over interconnectors as shown in Figure 2. GGGGT ransmissionDistributionDistribution e nd- usersExportTransmission End-usersLossesImportLossesGGGGT ransmissionDistributionDistribution e nd- usersExportTransmission End-usersLossesImportLossesGGGGGGGGGGGT ransmissionDistributionDistribution e nd- usersExportTransmission End-usersLossesImportLosses Figure 2: Transmitted Electricity should be calculated by adding up all electricity (in GWh) flowing across the dotted line during the reporting period.

9 Formula/Data measurement The following methodology is used for measuring Transmitted Energy: Transmitted Electricity will be metered hourly by kWh metering equipment (interval TECHNICAL PERFORMANCE INDICATORS 4 meters), installed on the borders of Kostt s network; The hourly meter readings will be corrected for the fact that they are not installed exactly on the border of Kostt s network; For all hours during the reporting period, the Transmitted Energy will be calculated, using the following formula (see also Figure 1 and Figure 2 above): users_Load-on_EndTransmissi nergyExported_Ed_EnergyTransmitte+=1 Losseson_System_Transmission_LoadDistrib uti ++ or EnergyGenerated_ nergyImported_Ed_EnergyTransmitte+=2 Target This PERFORMANCE indicator tells more about exogenous effects on Kostt than about the PERFORMANCE of Kostt itself, since all individual parameters out of which the Transmitted Energy is calculated (Import, Export, generation and load) are heavily dependent on how market participants are acting on the market.

10 However, Kostt will try to influence this a bit by making as much transmission capacity available on its network as possible. Most important reason for collecting Transmitted Energy though is that this figure provides a reference figure which could be used for comparing other KPIs historically and with similar KPIs of other TSOs. Therefore, we propose not defining a target for this KPI. 1 Including Load from generators in case their load is larger than their generation ( net importers). 2 Including Generation in distribution and transmission end-users in case their generation exceeds their load ( net exporters). TECHNICAL PERFORMANCE INDICATORS 5 Coincident Peak demand (MW) N T2 Coincident Peak demand (MW) Definition KPI T2a: Coincident Peak demand (MW) including transit Coincident Peak demand (MW) is defined as the coincident National Peak load of the transmission system in the reporting period and includes only load transmitted in the system that is the responsibility of the TSO and that is supplied to the Distribution System, Transmission end users and Export should be reported.