Electrical engineering, through power electronics, machines and drives, underpins all renewable electricity generation, conversion and integration. The drive to achieve higher power and higher efficiency, use more sustainable materials, and provide greater control and reliability for next generation renewables relies on rapid step changes in technology for the underlying power electronics, machines, drives and control systems (PEMD). The drive for improved efficiency in industry alongside the increasing electrification of transport and heating and cooling is encouraging the development of PEMD in academia and industry. The UK government and industry are building the skills, knowledge and supply chain to support these sectors, but sustainable renewable generation is making slow progress towards the PEMD technology that is needed to underpin next generation renewables. N-ZEEE will bring together for the first time the diverse and disparate research activity in emerging electrical engineering for next-generation renewables to form a coherent community of engineers that can empower significant change in the approach to this critical and enabling field. N-ZEEE will be a community of academia, industry, policy makers and wider stakeholders to ensure cross-sector technology transfer in addition to renewables-specific developments that will enable next generation wind, marine, photovoltaic and novel future energy generation and allow the UK to deliver its energy and climate priorities and pioneer underpinning PEMD research. The N-ZEEE Network will enable the transition to future PEMD generation, conversion and integration technologies by: 1. Building a strong academic and industrial research community focused on delivering next-generation-enabling PEMD technologies by fostering new relationships and building on established relationships to grow an extensive and coherent network of knowledge, research and practice. 2. Providing a network of research excellence in enabling PEMD technology leading to a Supergen Hub of excellence in PEMD whilst enhancing existing and future sector-focused Supergen Hubs. The current hub model has a patchwork of narrowly-focused PEMD research into application-specific technology; instead, N-ZEEE will provide a centre of critical mass that can be tapped into by existing and future sector-specific Hubs. 3. Creating a Network within which cross-cutting themes will strengthen the UK's ability to develop next-generation-enabling PEMD technology for renewable generation, conversion and integration. The Network will nurture the integration of ideas between different PEMD fields (e.g. electric automotive and aviation), creating a community that can make the rapid progress required to achieve net-zero within the critical timescales. 4. Providing support for early career researchers to build solid relationships and develop their networking expertise so that they can drive forward future research in enabling electrical engineering. The early career researchers of today will be supported to become the research leaders of tomorrow. 5. Providing a forum for doctoral students researching PEMD within existing application-focused Centres for Doctoral Training (CDTs) to come together to share ideas and develop their networks in an open and constructive environment (e.g. Aura, IDCORE, Sustainable Electric Propulsion, ReNU).

The development of tidal stream energy presents a significant opportunity for the UK with a power generation potential in excess of 6GW nationally, and greater than 150GW globally. Delivering on net-zero and climate change objectives will require development and exploitation of all renewable energy resources to provide a robust and secure energy supply. The predictability of the tidal resource is a key benefit that can substantially contribute to resilient energy networks and complement less predictable renewable energy sources, e.g. wind, wave and solar. The UK currently leads tidal stream technology and science development, and there is significant opportunity to ensure global leadership of this exciting emerging sustainable energy sector. To date, the largest tidal device installed is 2MW and the largest array of devices is 6MW in Orkney and Pentland Firth respectively. Device technologies, marine infrastructure, deployment, and operational strategies have all been refined through industrial research, design and deployment at testing sites, assisted by university partnerships. The challenge now faced by the industry is to understand how to deliver tidal stream energy at a scale that will make a meaningful energy contribution. The solution hinges on the ability to deliver reliable, sustainable, scalable and affordable engineering solutions. The engineering challenge is complex and multi-faceted, and the importance of and sensitivity to design drivers are not always well understood. CoTide's research vision is to develop and demonstrate holistic integrated tools and design processes for tidal stream energy that will significantly reduce costs by removing unnecessary redundancy and improving confidence in engineering solutions, providing the transformative engineering processes and designs that will enable tidal energy to make a significant contribution to achieving climate change objectives by 2030-40. CoTide brings together three major university multi-disciplinary teams, each with deep world-leading expertise across the major engineering disciplines essential for the design of tidal stream devices. These include device hydrodynamics, composites and rotor materials, structures and reliability, metocean resource and environmental modelling, system control and optimisation. The constituent engineering design capabilities will be integrated towards addressing the big questions facing tidal stream energy developers through a unified control co-design process. Through this holistic approach, CoTide will not only develop the framework to assess the impact of design drivers and design decisions but will contribute fundamental understanding of unsteady rotor loads and means to control and resist these, how to use contemporary and emerging manufacturing methods to benefit cost and through-life reliability in addition to maximising the potential of digitalisation for optimal performance. With input from its Independent Advisory Board, the Programme resources will be periodically reviewed, adapted and refocused to concentrate on the research challenges that emerge from our research, the tidal energy sector and policy space, and that offer the best opportunities to support industry cost reduction pathways. As CoTide evolves, in addition to its core skills, the partners have a significant breadth of additional expertise to draw upon, with world leading capabilities in complementary areas within offshore renewable energy. CoTide is an ambitious but realistic programme that has the scale, academic gravitas, and resource to achieve innovation through addressing transformative design questions. Through its co-design framework, considering the full scope of interconnected engineering challenges and environmental factors, it will deliver the understanding, tools and data to support the progressive and step change reductions in cost and uncertainty needed to deliver scalable, sustainable and affordable tidal stream energy.

The Government's commitment to increasing offshore and marine renewable energy generation presents significant technological challenges in designing, commissioning and building the infrastructure, connecting offshore generation to onshore usage, and considering where these new developments are best placed, whilst balancing the impact they have upon the environment. In tandem, this commitment presents opportunities to advance UK capabilities in cutting-edge engineering and technologies in pursuit of net zero. Liverpool is home to one of the largest concentrations of offshore wind turbines globally in Liverpool Bay, the second largest tidal range in the UK, some of the largest names of maritime engineering alongside numerous SMEs, and the Port of Liverpool, a Freeport and Investment Zone status. The latest Science and Innovation Audit (2022) highlights Net Zero and Maritime as an emerging regional capability, and is an area in which the Liverpool City Region Combined Authority has stated its ambition to grow an innovation cluster. The University of Liverpool and Liverpool John Moores University each host world-class research expertise, environments and facilities relevant to addressing these maritime energy challenges, and have an established, shared track record in collaboration with industrial and civic partners. The Centre for Doctoral Training in Net Zero Maritime Energy Solutions (N0MES CDT) will play a vital role in filling critical skills gaps by delivering 52 highly trained researchers (PGRs), skilled in the identification, understanding, assessment, and solutions-delivery of pressing challenges in maritime energy. N0MES PGRs will pursue new, engineering-centred, interdisciplinary research to address four vital net zero challenges currently facing the North West, the UK and beyond: (a) Energy generation using maritime-based renewable energy (e.g. offshore wind, tidal, wave, floating solar, hydrogen, CCS) (b) Distributing energy from offshore to onshore, including port- and hinterland-side impacts and opportunities (c) Addressing the short- and long-term environmental impacts of offshore and maritime environment renewable energy generation, distribution and storage (d) Decommissioning and lifetime extension of existing energy and facilities The N0MES CDT will empower its graduates to communicate, research and innovate across disciplines, and will develop flexible leaders who can move between projects and disciplines as employer priorities and scientific imperatives evolve.

The pace of deployment of offshore wind (OW) energy is rapidly accelerating to power the transition to net zero. The UK government aims to increase from the current 14GW of offshore wind to at least 50GW by 2030, requiring c£17bn investment per year, then 120-170GW by 2050, to provide clean energy resilience. Despite the remarkable success of OW over the past decade, making it a central component of the UK energy mix, future growth brings new challenges. Deployment must now expand beyond the relatively benign, shallow waters of the southern North Sea to sites further from shore, a fundamentally different engineering, operating and natural environment. In such areas the two-way effects of new OW engineering on the marine biosphere and concomitant impact on other sea users are poorly understood. Beyond technical challenges, a major barrier to rapid deployment is consenting time. The Government aim to reduce typical consent time from 4 years to 1 year by 2030 is only achievable if new approaches to data collection, aggregation and modelling are validated and adopted. The volume and speed of deployment must increase 6-fold, while remaining commercially competitive, requiring industrialisation of manufacturing and installation while ensuring that materials (such as rare earth metals, copper, composites) and other resources (including energy) are used sustainably. The OW workforce will reach >100,000 direct and indirect jobs by 2030, with >8,000 projected at HE Level 7+. To achieve and sustain this, the workforce must be drawn from a diverse talent pool and be built on equitable, inclusive cultures where safety and wellbeing are central. The sector OW Industry Council (OWIC) recognises that increasing growth, and UK supply chain content, requires a highly skilled and resilient workforce and highlights the key role of CDT programmes in providing this. The previous EPSRC-NERC Aura CDT in Offshore Wind Energy and the Environment (Aura CDT I) successfully demonstrated the value of OW research and training at the interface of engineering and environmental sciences. Sustainable sector growth now requires further research that integrates emergent social, societal and economic challenges of OW energy. Thus, the proposed UKRI Centre for Doctoral Training in Offshore Wind Energy Sustainability and Resilience (Aura CDT II), provides integrated solutions across the EPSRC/NERC/ESRC remit. These transdisciplinary sector needs are co-identified by key sector stakeholders, including Aura CDT project partners OWIC, ORE Catapult, The Crown Estate, Renewable UK and DEFRA. Direct industry engagement has co-created five Aura CDT II challenge-based themes to: push the frontiers of offshore wind technology; accelerate consent and support environmental sustainability; achieve a sustainable wind farm life cycle; build and support a sustainable workforce; and develop a resilient net-zero energy system. The importance of these themes to the sector is demonstrated by the cash and in-kind support of >40 project partners, allowing us to support >75 CDT students. The CDT connects the University of Hull with partner Universities Sheffield, Durham and Loughborough. PL Dorrell (Director of Aura CDT I) is supported by nine CLs from the partner universities and a pool of >100 diverse supervisors bringing world leading expertise in the areas of engineering, environment and social sciences required to support the training and research elements. Both full and part time students will receive postgraduate training delivered collaboratively through an intensive 6-month multidisciplinary programme at Hull and subsequent courses, with all partners, addressing topics including leadership, public engagement, responsible innovation and EDIW. Small clusters of doctoral students will link expertise from across the four universities and industry partners to provide holistic insights into sector challenges while building cross-cohort collaboration and multiplying impacts.