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Annual Planning Report 2020 Table of contents Section 1 Introduction 3 Section 2 Planning considerations 7 Section 3 Demand forecasts and scenario planning 13 Section 4 Emerging technology 17 Section 5 Key completed projects 23 Section 6 Transmission network issues and developments 27 Section 7 Distribution network issues and developments 49 Section 8 Conclusion 57 Appendix A Estimated maximum short circuit levels for 2019/20 59 Western Power Annual Planning Report 2020 1 2 Western Power Annual Planning Report 2020 1 Introduction Western Power Annual Planning Report 2020 3 Who we are For more than 70 years, We’re already harnessing new technology and are excited about further opportunities to Western Power has evolve with the changing energy needs of our provided Western customers to keep them connected every step of the way. Australians with safe, We build, operate and maintain the reliable and efficient transmission and distribution networks which cover a service area of over 255,000km². electricity. The transmission network is shown in the diagram on page 6. Our vast transmission and distribution network seamlessly connects our homes, businesses The network is inherently dynamic and and essential community infrastructure to an complex. Customers’ needs change and we increasingly renewable energy mix, to build our regularly receive new connection applications. State and meet the changing energy needs You should use the information in this report of Western Australians. We’re powered by only as a guide and we recommend that you community trust and the passion of our people. get in touch with us as early as possible when planning your project. We perform detailed system studies to confirm the technical And we have our eyes feasibility of connections and having this information early can greatly assist in firmly on the future. planning your project. The information presented in this report is Understanding how the network will function, as at 30 June 2020 unless otherwise noted. and unlocking future opportunities for customers, businesses and the State is critical. New technology, demands for cleaner energy and alternative energy solutions are creating changes in the traditional electricity value chain. Increasingly, the network is acting as a platform for customers to choose how they want their electricity supplied and delivered. 4 Western Power Annual Planning Report 2020 INTRODUCTION We build, operate and maintain the transmission and distribution network. Our service area of 255,064km²: » is bigger than the United Kingdom » contains 103,069 km of circuit wire – two and a half times the Earth’s circumference (40,075km) » is geographically vast – an average of 4.5 customers per square kilometre 103,069km circuit wire 825,309 poles & towers 1.159M customer connections 255,064km2 SWIS Western Power Annual Planning Report 2020 5 Geraldton Our transmission Mungarra NORTH COUNTRY Three Springs network Eneabba Cataby Moora Regans Pinjar Muchea NEERABUP Neerabup Terminal EASTERN GOLDFIELDS Wanneroo Merredin Northern Mullaloo GUILDFORD Terminal TERMINAL Northam Merredin West Kalgoorlie NORTHERN North Terminal Terminal Beach Midland TERMINAL Junction Osborne Guildford Park Mount Terminal Darlington Lawley Forresteld WESTERN Kalamunda TERMINAL East Perth Terminal Western Cook Street Terminal Belmont EAST PERTH Kenwick Cannington Link EAST COUNTRY Terminal Terminal CANNINGTON Riverton TERMINAL Amherst South Southern Southern Terminal Gosnells Fremantle River Terminal Bibra Lake SOUTHERN SOUTH Cockburn TERMINAL FREMANTLE Cement Byford Kwinana Terminal Kondinin KWINANA Pinjarra Mandurah Wagerup Boddington Oakley Wells Terminal Narrogin Terminal South Terminal MANDURAH Landwehr Terminal Muja Worsley Shotts Wagin Kemerton Terminal Terminal Muja Terminal Picton Terminal Bunbury Harbour Kojonup Katanning BUNBURY MUJA Busselton Manjimup Albany The Western Power transmission network. Please note that not all transmission lines and substations are shown. 6 Western Power Annual Planning Report 2020 2 Planning considerations Western Power Annual Planning Report 2020 7 We are planning for the future Annual planning process Planning and partnerships We publish an Annual Planning Report (APR) to: The APR complements the Australian Energy Market Operator’s (AEMO) Wholesale Electricity » outline existing and emerging capacity Market (WEM) Electricity Statement of constraints Opportunities (ESOO). » highlight network investment opportunities on the network While the WEM ESOO focuses on the overall » detail how we seek and integrate network adequacy of generation capacity over a 10- solutions to maintain or improve service year timeframe, the APR’s focus is to identify levels. emerging network capacity issues and potential solutions in the next five years. If you’re planning to connect to the network, we encourage you to get in contact with us as early Together these documents provide a valuable as possible to discuss your plans. insight into current and future opportunities for existing and new generators, large and small businesses, developers and consumers. What information goes into planning? An ever-changing Our published plans have a five-year outlook environment and cover: The traditional energy service business model – » load demand forecasts a network of assets that delivers electricity » generation scenarios one-way – is no longer the norm. Now, » transmission and distribution network networks have to facilitate bi-directional flow. developments and projects » estimated maximum fault levels. We are embracing this changing environment and are transforming how we plan, build and We have refreshed the estimated maximum operate our network. New technologies and fault levels at each substation. The data can be customers who are more conscious of their found in Appendix A. energy source are also driving demand for more renewable energy and non-traditional solutions. The diagram below depicts how the network will transition from the existing integrated network to a modular network. 8 Western Power Annual Planning Report 2020 PLANNING CONSIDERATIONS Reshaping our network Network evolution is reliant on community behaviour, technology advancement rates, regulation and policy Integrated Fringe Modular Fully Network Disconnection Network Decentralised Current Future model with small Future model with Extreme model without SWIS model number of islanded systems variable network types centralised network KEY Branch network Mesh network Microgrid Stand-alone power system (SPS) Energy Transformation informed by energy industry stakeholders and Strategy market participants. It brings together the important aspects of power system planning On 20 May 2019, the Hon Bill Johnston MLA, under a single umbrella. The Plan for the South Minister for Energy, established the Energy West Interconnected System (SWIS) was Transformation Taskforce to deliver the Western released by the Minister for Energy in October Australian Government’s Energy Transformation 2020 and: Strategy. The Energy Transformation Strategy is the Government’s work program to deliver » identifies the best options for investment in secure, reliable, sustainable and affordable our power system, to maintain security and electricity to Western Australians for years to reliability at the lowest sustainable cost come. We have a significant role to play in » assists in the transition to a lower-emissions assisting the Western Australian Government power system by guiding the efficient to deliver the Strategy. integration of renewable generation and identifying opportunities for energy storage, The Strategy will be delivered under three which will play an increasing role in meeting work streams: essential electricity needs » provides guidance to regulators and industry regarding efficient power system investment, 1. Whole of System Planning and to policymakers on the future needs of the power system. A Whole of System Plan (WOSP) has been developed by the Energy Transformation The WOSP will be a key influence on the Taskforce. Western Power, along with AEMO, content of future Annual Planning Reports. was a key contributor to this plan, which is Western Power Annual Planning Report 2020 9 2. Foundation Regulatory Frameworks Unless the way the power system is regulated and managed is modernised: Improving access to the Western Power network » energy will not be dispatched at the Current network access arrangements do not least sustainable cost make the best use of available transmission » the power system will be limited in its capacity and the existing investment in the ability to accommodate growing levels network, resulting in barriers to entry for new of renewable generation and other new generators. The arrangements have also technologies (such as battery storage) led to an outcome where generators have while maintaining security and reliability, different rights to access the network, creating and inefficiencies in the dispatch of generators in the » signals for investment in the power Wholesale Electricity Market. system – at the right time and place – will be inadequate. The proposal to adopt a framework of constrained access aims to improve generator Following consultation, the Energy access to the Western Power network by Transformation Taskforce will make decisions providing more equitable access for generators on elements of market and regulatory and optimising grid use. design. These decisions will form the basis for changes to market rules and regulations. This will help remove barriers to
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