FINAL REPORT (ISSUE 07A) Public Disclosure Authorized Supporting electricity sector reform in Libya TASK C: Institutional Development and Performance Improvement of GECOL Public Disclosure Authorized Report 4.2: IMPROVING GECOL TECHNICAL PERFORMANCE Public Disclosure Authorized Public Disclosure Authorized 14/12/2017 TASK C – REPORT 4.2: IMPROVING GECOL TECHNICAL PERFORMANCE Contents 1 Executive Summary ................................................................................................... 5 1.1 Generation .................................................................................................................. 7 1.2 Transmission .............................................................................................................. 12 1.3 Control ....................................................................................................................... 14 1.4 Medium Voltage ........................................................................................................ 16 1.5 Distribution ................................................................................................................ 17 2 Introduction ............................................................................................................ 19 3 Generation .............................................................................................................. 24 3.1 Current status ............................................................................................................ 24 3.1.1 Overview ............................................................................................................ 24 3.1.2 Overdue maintenance ....................................................................................... 33 3.1.3 Fuel supply ......................................................................................................... 39 3.1.4 Third party power stations ................................................................................ 40 3.1.5 Generation expansion ........................................................................................ 41 3.2 Energy balance .......................................................................................................... 47 3.3 Points of concern....................................................................................................... 50 3.3.1 Immediate concerns .......................................................................................... 50 3.3.2 Longer term concerns ........................................................................................ 51 3.4 Generation action plan.............................................................................................. 52 4 Transmission ........................................................................................................... 56 4.1 Current status ............................................................................................................ 56 4.2 Transmission substations .......................................................................................... 57 4.3 Overhead transmission lines ..................................................................................... 63 4.4 Underground transmission cables ............................................................................ 66 4.5 Points of concern....................................................................................................... 67 4.5.1 Immediate concerns .......................................................................................... 67 4.5.2 Longer term concerns ........................................................................................ 67 4.6 Transmission action plan ........................................................................................... 69 5 Control .................................................................................................................... 74 5.1 Current status ............................................................................................................ 74 5.1.1 Overview ............................................................................................................ 74 2 TASK C – REPORT 4.2: IMPROVING GECOL TECHNICAL PERFORMANCE 5.1.2 National Control Center (NCC) ........................................................................... 75 5.1.3 Tripoli Regional Control Center (TRCC) .............................................................. 78 5.1.4 Benghazi Regional Control Center (BRCC) ......................................................... 79 5.1.5 Distribution Control Centers (DCC) .................................................................... 80 5.1.6 Generation Dispatch and Transmission Network Control ................................. 82 5.1.7 Telecommunications .......................................................................................... 89 5.1.8 Demand side management (DSM) ..................................................................... 90 5.2 Points of concerns ..................................................................................................... 93 5.2.1 Immediate concerns .......................................................................................... 93 5.2.2 Longer term concerns ........................................................................................ 94 5.3 Control action plan .................................................................................................... 95 6 Medium Voltage (Subtransmission) ......................................................................... 99 6.1 Medium Voltage cables and overhead lines ............................................................. 99 6.1.1 Investment Strategy ........................................................................................... 99 6.1.2 Description of 66kV & 30kV lines (cables and overhead lines) population ..... 101 6.1.3 Condition of GECOL's MV lines, faults and outages ........................................ 102 6.2 Medium Voltage switchgear ................................................................................... 105 6.2.1 Analysis of MV switchgear failures .................................................................. 106 6.3 Medium Voltage power transformers .................................................................... 107 6.3.1 MV transformers investment strategy ............................................................ 108 6.3.2 Description of MV transformers population ................................................... 109 6.3.3 Condition of GECOL MV power transformers and their defects ..................... 109 6.4 Points of concern..................................................................................................... 115 6.4.1 Immediate concerns ........................................................................................ 115 6.4.2 Longer term concerns ...................................................................................... 115 7 Distribution ........................................................................................................... 117 7.1 Introduction............................................................................................................. 117 7.2 Distribution asset statistics ..................................................................................... 117 7.3 Investment strategy ................................................................................................ 117 7.3.1 Distribution transformers ................................................................................ 118 7.3.2 Distribution cables ........................................................................................... 118 3 TASK C – REPORT 4.2: IMPROVING GECOL TECHNICAL PERFORMANCE 7.3.3 Distribution substations ................................................................................... 119 7.4 Description of assets population ............................................................................. 120 7.4.1 Ground mounted transformers ....................................................................... 120 7.4.2 Distribution substations ................................................................................... 122 7.4.3 Distribution lines .............................................................................................. 123 7.5 Condition of Distribution assets and their defects ................................................. 124 7.5.1 Condition of ground mounted distribution transformers – defects and failures 124 7.5.2 Condition of pole mounted distribution transformers – defects and failures 130 7.5.3 Condition of GECOL distribution substations and their defects ...................... 134 7.5.4 Condition of distribution lines and their defects ............................................. 139 7.6 Points of concern..................................................................................................... 143 7.6.1 Immediate concerns ........................................................................................ 143 7.6.2 Longer term concerns ...................................................................................... 144 8 MV and Distribution action plan ............................................................................ 145 9 Key Performance Indicators ..................................................................................