All TSOs' Common Grid Model Alignment Methodology in accordance with Article 24(3)(c) of the Common Grid Model Methodology 29 November 2017 1 2 ENTSO-E AISBL • Avenue de Cortenbergh 100 • 1000 Brussels • Belgium • Tel + 32 2 741 09 50 • Fax + 32 2 741 09 51 • [email protected] • www. entsoe.eu All TSOs' Common Grid Model Alignment Methodology in accordance with Article 24(3)(c) of the Common Grid Model Methodology 3 Table of Contents 4 5 1 Introduction ...................................................................................................................... 6 6 7 2 Legal background ............................................................................................................. 9 8 2.1 Regulation 2015/1222 ................................................................................................... 9 9 2.2 Other European legislation .......................................................................................... 10 10 2.3 Common Grid Model Methodology ("CGMM") ........................................................ 11 11 12 3 CGMA Algorithm .......................................................................................................... 18 13 3.1 The three phases of the CGMA process ...................................................................... 18 14 3.2 Requirements with respect to the PPD ........................................................................ 21 15 3.3 Processing phase: the CGMA algorithm ..................................................................... 26 16 3.4 Post-processing phase ................................................................................................. 41 17 18 4 Business processes ......................................................................................................... 42 19 4.1 CGMA business processes overview .......................................................................... 42 20 4.2 Summary of the three phases ...................................................................................... 42 21 4.3 Pre-processing phase process steps ............................................................................. 46 22 4.4 Processing phase process steps ................................................................................... 48 23 4.5 Post-processing phase process steps............................................................................ 67 24 4.6 Deadlines for all process steps and all time frames ..................................................... 69 25 26 5 Reporting ........................................................................................................................ 71 27 28 6 IT implementation .......................................................................................................... 72 29 6.1 CGMA IT platform within the overall IT architecture ................................................ 72 30 6.2 The CGMA IT specification ....................................................................................... 74 31 6.3 Summary of CGMA Data Exchanges Implementation Guide .................................... 80 32 33 34 2 ENTSO-E AISBL • Avenue de Cortenbergh 100 • 1000 Brussels • Belgium • Tel + 32 2 741 09 50 • Fax + 32 2 741 09 51 • [email protected] • www. entsoe.eu All TSOs' Common Grid Model Alignment Methodology in accordance with Article 24(3)(c) of the Common Grid Model Methodology 35 36 37 Table of Contents for Annexes 38 39 I. ANNEX - Test Results ...................................................................................................... 82 40 41 II. ANNEX - Coordinated Pre-processing Approaches ......................................................... 83 42 II (i) Pre-processing approach of CORESO ........................................................................... 84 43 II (ii) Pre-processing approach of Nordic RSC ...................................................................... 89 44 II (iii) Pre-processing approach of Baltic RSC .................................................................... 108 45 II (iv) Pre-processing approach of SCC ............................................................................... 110 46 47 III. ANNEX - Summary of parameters used ......................................................................... 118 48 49 IV. ANNEX - Data Formats .................................................................................................. 120 50 51 V. ANNEX - Glossary ........................................................................................................ 123 52 53 VI. ANNEX - CGM area in terms of coverage of bidding zones (as of 2017-07) 54 as well as DC lines .......................................................................................................... 125 55 56 VII. ANNEX - CGM area in terms of coverage of CGMA algorithm optimisation areas 57 (as of 2017-07) as well as DC lines ................................................................................ 132 58 3 ENTSO-E AISBL • Avenue de Cortenbergh 100 • 1000 Brussels • Belgium • Tel + 32 2 741 09 50 • Fax + 32 2 741 09 51 • [email protected] • www. entsoe.eu All TSOs' Common Grid Model Alignment Methodology in accordance with Article 24(3)(c) of the Common Grid Model Methodology 59 60 List of figures 61 62 Figure 1: Phases of CGMA process .......................................................................................... 20 63 Figure 2: Unbalanced preliminary AC-only net positions and preliminary DC flows 64 at the start of the processing phase ............................................................................ 26 65 Figure 3: Balanced AC-only net positions and balanced DC flows at the end of 66 the processing phase .................................................................................................. 28 67 Figure 4: Absolute minimum and maximum net positions ....................................................... 45 68 Figure 5: Substitution matrix .................................................................................................... 55 69 Figure 6: Operational Planning Data Environment (stylised representation) ........................... 73 70 Figure 7: Operational Planning Data Environment (stylised architecture) .............................. 73 71 Figure 8: CGMA IT platform architecture ............................................................................... 74 72 Figure 9: CGMA external data exchanges (D-2) excluding DC PSLC sub-process ................ 76 73 Figure 10: Retraining frequency (illustration) ............................................................................ 86 74 Figure 11: Principle of the Support Vector Machine (SVM) algorithm ..................................... 88 75 Figure 12: Example of estimated (brown) and market (blue) flows and the 76 minimum and maximum net positions for SE1. ........................................................ 97 77 Figure 13: Lowest and highest maximum positions in 2015 and physical maximum. ............... 98 78 Figure 14: Bidding zone with transfer flow ................................................................................ 99 79 Figure 15: Correlations between German renewable generation and Nordic net positions ...... 100 80 Figure 16: Effect of including German net demand in the calculation of the sum of 81 squared net demands ............................................................................................... 101 82 Figure 17: Preliminary distribution functions of the flow errors .............................................. 102 83 Figure 18: Supply and demand curves for one area, original (to the left) and modified 84 (to the right) ............................................................................................................. 103 85 Figure 19: Supply and demand curves German/Austria (source: EPEX) ................................. 104 86 Figure 20: Comparison of MAEs for three approaches ............................................................ 106 87 Figure 21: Overview of pre-processing approach envisaged in Baltic region .......................... 108 88 Figure 22: Dispersion of deviation between forecasted net position and realized 89 net positions for EMS, for test period of one year .................................................. 116 90 Figure 23: Absolute forecast errors for all test hours ................................................................ 117 91 Figure 24: Stylised topology of CGMA optimisation areas ...................................................... 142 92 4 ENTSO-E AISBL • Avenue de Cortenbergh 100 • 1000 Brussels • Belgium • Tel + 32 2 741 09 50 • Fax + 32 2 741 09 51 • [email protected] • www. entsoe.eu All TSOs' Common Grid Model Alignment Methodology in accordance with Article 24(3)(c) of the Common Grid Model Methodology 93 94 List of tables 95 96 Table 1: Instantaneous peak load 2016 ................................................................................... 24 97 Table 2: Test case results, bidding zones ................................................................................ 94 98 Table 3: Test case results, countries ........................................................................................ 94 99 Table 4: Test case results, HVDC flows ................................................................................. 96 100 Table 5: Mean Average Error per bidding zone in MW for the Euphemia based 101 approach, compared with alternatives ....................................................................