Asset Management Plan 1 April 2020 to 31 March 2030 Contents SUMMARY .................................................................................................... 7 Quality of supply ................................................................................................................... 47 Consumer responsiveness ................................................................................................... 51 Highlights of this AMP ............................................................................................................. 8 Cost performance ................................................................................................................. 52 Conductor renewal ................................................................................................................. 8 Network continuance ........................................................................................................... 54 Duty of care ............................................................................................................................. 8 Utilisation and losses ............................................................................................................ 58 Consumer expectations .......................................................................................................... 8 Objective commitments ....................................................................................................... 59 Uneconomic reticulation issues ............................................................................................. 9 Business continuance ........................................................................................................... 59 Resilience to extreme events ................................................................................................. 9 Performance summary and response ................................................................................. 60 Load growth and distributed generation ............................................................................... 9 ASSET MANAGEMENT STRATEGY ............................................................... 61 Energy efficiency ................................................................................................................... 10 Cost efficiency ....................................................................................................................... 10 Overarching asset strategy ................................................................................................... 61 Disclosure of this AMP .......................................................................................................... 10 Systems and information management .............................................................................. 63 INTRODUCTION .......................................................................................... 11 Compliance ........................................................................................................................... 73 Risk management ................................................................................................................. 73 Purpose of this AMP ............................................................................................................. 11 Lifecycle management ......................................................................................................... 81 Basis of AMP .......................................................................................................................... 11 Vegetation management ..................................................................................................... 86 Key stakeholders and objectives .......................................................................................... 12 Surveillance ........................................................................................................................... 88 Link to other documents ...................................................................................................... 12 Network development strategy........................................................................................... 91 Period covered ...................................................................................................................... 13 Non-network solutions ......................................................................................................... 96 Structure of this AMP ............................................................................................................ 14 Key assumptions ................................................................................................................. 100 NETWORK OVERVIEW ................................................................................ 15 Asset management improvement ..................................................................................... 102 Region and context ............................................................................................................... 15 NETWORK DEVELOPMENT ........................................................................ 104 Network and demand ........................................................................................................... 26 Overview ............................................................................................................................. 104 Supply within Marlborough .................................................................................................. 28 Growth/demand projections ............................................................................................. 104 STAKEHOLDER INTERESTS AND OBJECTIVES ALIGNMENT ........................... 36 Area plans ........................................................................................................................... 105 Stakeholder interests ............................................................................................................ 36 Grid Exit Point and embedded generation ........................................................................ 114 Stakeholder engagement ..................................................................................................... 38 Major network development projects .............................................................................. 115 Business and planning response .......................................................................................... 40 CUSTOMER WORKS .................................................................................. 122 NETWORK PERFORMANCE AND SERVICE LEVELS ........................................ 46 Marlborough Lines Limited Asset Management Plan - 1 April 2020 to 31 March 2030 2 New connections ................................................................................................................ 122 Opex .................................................................................................................................... 186 Asset relocations ................................................................................................................. 123 Capex/opex trade-off and overlapping works .................................................................. 187 FLEET MANAGEMENT ............................................................................... 125 Capacity to deliver .............................................................................................................. 187 Fleet management overview ............................................................................................. 125 APPENDICES ............................................................................................. 189 Overhead structures (poles) ............................................................................................... 125 Glossary ............................................................................................................................... 189 Overhead conductor ........................................................................................................... 130 Regulatory schedules ......................................................................................................... 192 Cables ................................................................................................................................... 136 Regulatory requirements look-up ..................................................................................... 193 Zone substations ................................................................................................................. 141 Single line diagram of 33kV Network ................................................................................ 201 Distribution transformers ................................................................................................... 148 SCADA coverage map ......................................................................................................... 203 Distribution switchgear ....................................................................................................... 156 Business organisation and role responsibilities ................................................................ 203 Earthing Systems ................................................................................................................