National Grid Code Guyana Power & Light GUYANA POWER AND LIGHT INCORPORATED National Grid Code National Grid Code Guyana Power & Light ABBREVIATIONS: ............................................................................................................................. I 1. NATIONAL GRID CODE ......................................................................................................... 1.1 1.1 INTRODUCTION .......................................................................................................................... 1.1 1.2 OBJECTIVES ............................................................................................................................... 1.1 1.3 SCOPE OF GRID CODE AND GENERAL CONDITIONS ............................................................... 1.1 1.4 GRID CODE REVIEW PANEL ..................................................................................................... 1.1 1.5 GRID CODE REVISIONS ............................................................................................................. 1.4 1.6 CODE CONFIDENTIALITY ......................................................................................................... 1.5 ABBREVIATIONS: ............................................................................................................................ II 2. PLANNING CODE .................................................................................................................... 2.1 2.1 INTRODUCTION .......................................................................................................................... 2.1 2.2 OBJECTIVES ............................................................................................................................... 2.1 2.3 SCOPE / APPLICABILITY ........................................................................................................... 2.2 2.4 DEFINITIONS .............................................................................................................................. 2.2 2.5 RESPONSIBILITY ........................................................................................................................ 2.9 2.6 RELIABILITY CRITERIA ............................................................................................................ 2.9 2.6.1 NORMAL CONDITIONS ........................................................................................................... 2.10 2.6.2 SINGLE CONTINGENCY CONDITIONS ..................................................................................... 2.10 2.6.3 SINGLE CONTINGENCY CONDITIONS FOLLOWING THE LOSS OF A GENERATOR ................... 2.11 2.6.4 SINGLE CONTINGENCY CONDITIONS FOLLOWING THE LOSS OF A TRANSFORMER .............. 2.11 2.6.5 DOUBLE CONTINGENCY CONDITIONS ................................................................................... 2.12 2.6.6 SINGLE OUTAGE FOLLOWED BY A CONTINGENCY ................................................................ 2.12 2.6.7 CONSEQUENTIAL AND NON-CONSEQUENTIAL LOAD SHED .................................................. 2.12 2.7 VOLTAGE REGULATION STANDARDS .................................................................................... 2.13 2.8 VOLTAGE SWING CRITERIA ................................................................................................... 2.14 2.9 VOLTAGE STABILITY CRITERIA ............................................................................................ 2.14 2.10 DAMPING ............................................................................................................................... 2.14 2.11 FREQUENCY DEVIATIONS ..................................................................................................... 2.15 2.12 THERMAL LOADING .............................................................................................................. 2.15 2.13 SUPPLEMENTARY CONSIDERATIONS ................................................................................... 2.16 2.13.1 CONSIDERATIONS OF SYSTEM DISPATCH ............................................................................ 2.16 National Grid Code Guyana Power & Light 2.13.2 SYSTEM PROTECTION AND CONTROLS ................................................................................ 2.16 ABBREVIATIONS: .......................................................................................................................... III 3. INTERCONNECTION CODE ................................................................................................. 3.1 3.1 INTRODUCTION .......................................................................................................................... 3.1 3.2 OBJECTIVES ............................................................................................................................... 3.1 3.3 SCOPE / APPLICABILITY ........................................................................................................... 3.2 3.4 DEFINITIONS .............................................................................................................................. 3.3 3.5 RESPONSIBILITY ...................................................................................................................... 3.10 3.6 GENERATION INTERCONNECTION APPLICATION (GIAP) .................................................... 3.11 3.7 SYSTEM IMPACT STUDIES ....................................................................................................... 3.13 3.7.1 FEASIBILITY STUDY / SECURITY SCREENING ........................................................................ 3.13 3.7.2 FULL INTERCONNECTION STUDY (FIS) ................................................................................. 3.14 3.7.3 INTERCONNECTING CUSTOMER (IC)’S SYSTEM IMPACT RESPONSIBILITY ........................... 3.20 3.8 FACILITY STUDY ..................................................................................................................... 3.21 3.8.1 FACILITY STUDY PROCEDURE ............................................................................................... 3.21 3.9 FINAL STUDY REPORT AND SUBSEQUENT ACTIONS ............................................................. 3.22 3.10 COST ALLOCATION ............................................................................................................... 3.23 3.10.1 NATURE OF TRANSMISSION REINFORCEMENTS .................................................................. 3.23 3.10.2 COST ALLOCATION BREAKDOWN ....................................................................................... 3.24 3.11 GENERATOR INTERCONNECTION AGREEMENT (GIA) ....................................................... 3.27 3.12 QUEUE MANAGEMENT .......................................................................................................... 3.28 3.13 GENERATION INTERCONNECTION APPLICATION (GIAP) FEES ......................................... 3.29 3.13.1 FEASIBILITY STUDY FEES .................................................................................................... 3.29 3.13.2 FULL INTERCONNECTION STUDY FEES ................................................................................ 3.29 3.13.3 FACILITY STUDY COST ........................................................................................................ 3.30 3.14 APPENDIX A: GENERATION INTERCONNECTION APPLICATION ..................................... 3.31 3.15 APPENDIX B: INTERCONNECTION PROJECT DATA SET (IPDS) ...................................... 3.34 3.16 APPENDIX C: SAMPLE GENERATOR INTERCONNECTION AGREEMENT (GIA) 3.36 ABBREVIATIONS: ............................................................................................................................ V 4. OPERATIONAL CODE ............................................................................................................ 4.1 National Grid Code Guyana Power & Light 4.1 INTRODUCTION .......................................................................................................................... 4.1 4.2 OBJECTIVES ............................................................................................................................... 4.1 4.3 SCOPE ......................................................................................................................................... 4.2 4.4 DEFINITIONS .............................................................................................................................. 4.2 4.5 OPERATIONAL PLANNING ........................................................................................................ 4.9 4.5.1 DEMAND FORECASTING .......................................................................................................... 4.9 4.5.2 LONG TERM OPERATIONAL PLANNING ................................................................................. 4.10 4.5.3 MEDIUM TERM OPERATIONAL PLANNING ............................................................................ 4.11 4.5.4 SHORT TERM OPERATIONAL PLANNING................................................................................ 4.11 4.5.5 RESERVE MARGINS ............................................................................................................... 4.12 4.5.6 DEMAND CONTROL ............................................................................................................... 4.13 4.5.7 POWER SYSTEM RESTORATION ............................................................................................