TSO Comparison Group : An Overview

TSO Comparison Group Group - It is a group of the international electrical Transmission System Operators (TSOs) Area of Operation - Asia, Europe, Africa, Middle East, South Pacific and North and South America Year of Inception - 1995.   Total Members - 22

Mission : To exchange information on current and future System Operation practices for the purpose of benchmarking Focus Area : On System Operation activities which are usually concentrated in or close to the Control Center

Objectives To have Performance Measures Database (> 50 data points) Comparing with other TSOs (Benchmark Model) Identification of peers (Company profiles / Activity Lists) Learning from other TSOs (Best Practice) Informal contacts and TSO Questionnaires (Networking) Counter Benchmark to Regulatory Benchmark

The TSO Comparison Group members… Amprion, Germany China Southern Power Grid CLP Power (Hong Kong) Eirgrid (Ireland) ESKOM (South Africa) EWA (Bahrain) Fingrid Oyj (Finland) Hydro Quebec (Canada) Landsnet (Iceland) National Grid Transco (UK) PJM Interconnection (USA) POWERGRID, India PSE-O (Poland) Red Electrica de España SA REN (Portugal) Statnett SF (Norway) Svenska Kraftnatt (Sweden) Swissgrid TenneT BV (Netherlands) Transpower (Germany) Transpower (New Zealand)

Activities included : load/generation balancing, ancillary services network operation tasks markets operation influence of power markets on system operation

Some examples of the activities that are considered to be non-SO activities: System Expansion Planning; Power Market Administration / Power Exchange: Facilitate buying and selling of electricity and related products by organizing e.g. energy auction; Metering and Data Collection; Ancillary services provision: Providing the contracted ancillary services like generation reserves, losses, reactive support, etc.

Transmission Operation For Benchmark purposes a ‘standard TSO’ with five key System Operation processes has been defined.. Market Operation Transmission Operation System Operation

..and a process which takes into account the remaining differences between TSOs Company Profile Activity List Input Data Data Definition Data Collection, Verification, Validation Bench mark Benchmark Calculations Evaluation of Benchmark Results Results Discussion on Differences Identification of Learning Points

Data Collected annually since 2000, validated by KEMA, verified by group Example of data points: Operations Planning (1 year to 2 weeks before day of operation) Number of Planned Transmission Outages Number of Planned Generating-unit Outages Scheduling (2 weeks to 1 day before day of operation): Accuracy of peak load forecast Accuracy of minimum load forecast Transmission congestion: Generation constrained "on". Foreseen transmission concerns Scheduled transmission outage requests Scheduled generation outages Real Time Operation (Day of Operation): Frequency control performance Average overall system deviation Generation and load instructions Personnel on shift RTO transmission outages taken Support Operator training hours of teachers Number of SCADA database points (Status points, Analog points, Control points) Overall Performance: Transmitted energy at risk Response Time of Area Control Error or Frequency Energy unsupplied due to 'unsupplied energy incidents' Unsupplied energy incidents Voltage excursions Reference Data Number of Staff in Full Time Equivalents, separately for each process Costs, separately for each process and network losses Network date, including e.g. Circuit Ends, Line lengths, Generators, Peak Load, Transmitted Energy, Interconnectors. Support

For each process, two benchmark models have been developed… Environmental Factors (e.g. network size) TSO Process Input (staff, cost) Output (uniform)

..Here, an example of one of the 10 benchmark models is shown Environmental Factors EF1: Network Size (circuit ends, generators, interconnectors) EF2: Planned Outages (Transmission and Generation) Operations Planning Input FTE Output (uniform) Model parameters based on regression of TSO data The Group of International Comparison of Transmission System Operation Practices

Which results in an assessment for each process for FTE and Cost Example of Benchmark Results Details are available for members

Sharing of Practices by Out Performers Results of benchmark models and key activity matrices are used for the identification of out-performers on the different processes. These out-performers present their practices on this process in more detail during workshops of the TSO Comparison Group, which enables both learning from best practice and improvement of existing benchmark models.

Simultaneously differences between TSOs are being investigated… Part of ‘Activity List for Operations Planning process’ Share in IT costs The Group of International Comparison of Transmission System Operation Practices

Key Graph In addition to the benchmark model TSO Comparison Group has also developed a key graph which serves as an executive summary of the whole results in a single slide. This single slide summary provides an overview of both use of ‘resources’ and the performance of the member TSOs.

And summarized in management presentations Sum of five benchmark results Quality of System Operation (frequency, energy not supplied, Voltage)

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