University of Tasmania
Research Area: Smart grids, power system security
Abstract:The word “security” in the context of a power system implies its security against a complete collapse, or a blackout. Secure operation involves practices aimed to keep the system operating normally when contingencies occur. An increasing penetration of intermittent renewable energy generation introduces additional uncertainties in power systems. However, the impact of variable generation on the system security is often exaggerated. On average, no significant mitigation measures are required until the wind and solar penetration reaches 20 per cent. The main challenge facing a power system with high penetration of renewables is the displacement of conventional synchronous generation by non-synchronous generation. Kinetic energy stored in the rotating masses of synchronous generators provides the system rotational inertia. Wind power generators are mostly doubly-fed induction or full-converter machines. Because these machines are either partially or completely decoupled from the grid by electronic converters, they do not provide inertia to the system. This reduces the total system inertia, and as a result, the system becomes more vulnerable to contingencies. Traditionally security assessment is performed based on deterministic criteria. The N-1 security criterion requires a power system to withstand an outage of any single system component without violating any system operating limits. This is based on the worst-case scenario criterion and provides a simple rule in the system design and operation. It has satisfied the needs of the power industry for decades. However, the deterministic approach to security is not adequate in modern power systems with market driven dispatch and high penetration of renewable energy and distributed generation. In this paper, security is defined as the risk in the system’s ability to withstand random contingencies without interruption to customer service. The higher the risk the lower the security, and vice-versa. System operational risk is defined as the sum of products of the probabilities of random contingencies that may occur in a particular system state and the expected cost of load interruptions caused by these contingencies. In calculating the operational risk, we consider not just the likelihood of contingencies, but also uncertainties in load variability and renewable energy generation. In risk-based security assessment, we generate contingencies at random, based on their probabilities. Then, we assess the consequences of these contingencies to determine whether loads are disconnected following voltage violations, overloads and significant imbalance between load and generation.
A. Prof.Muhammad Shahzad Nazir
the Faculty of Automation with Huaiyin Institute of Technology, Huai’an, Jiangsu, China
Research Area: Renewable energy, Power system and its automation
Abstract:Advancement of civilizations, and in particular in their capability to withstand bulk populations, are twins to changes in the amount and type of energy available to meet human needs for nourishment and to complete tasks. Low access to energy is an aspect of poverty and the most probably the cause of lower efficiency of humans. Energy, and in specific electric power, is indeed fundamental to provide sufficient services such as food, water, healthcare, basic education, communication and employment. To date, the majority of energy consumed by our societies has derived from fossil and nuclear fuels, which are today facing severe issues such as security and scarcity of supply, financial affordability, and ecological sustainability and disaster dangers. To fix these undesirable issues, major countries, are enacting energy policies focused on the increase in the deployment of renewable energy technologies, i.e., the Northern Ireland and Republic of Ireland are the countries, which have ambitious targets for 40% of electricity to be supplied by renewables by 2020, with the majority estimated to be provided by wind power.
Among the renewable technologies, the wind is a prominent source of energy and synchronizing its share in global energy production market remarkably. Considering this context, in the last decades, there has been a fast growth and spread of renewable energy plants. Among them, wind generators are the most widespread type of intermittent renewable energy harvesters with their 539 GW of cumulative installed power at the end of 2017. Wind capacity, i.e. total installed power, is keeping a positive trend with an increase of 52.5 GW in 2017. In the future, such growth could decrease due to saturation of in-land windy areas that are suitable for installations.
Today, we will light-upon the emerging wind technologies considering their potential contribution, up to date challenges, environmental impacts, applications, and technology inclination and in what way they might evolve in the future. These technologies were identified as originating primarily from the academic sector, some start-up companies and a few larger industrial entities. The following capacities were deliberated: offshore floating concepts, airborne wind energy (AWE), smart rotors techniques, blade tip-mounted rotors, novel blade manufacturing techniques, multi-rotor turbines, wind-induced energy harvesting strategies, unconventional electricity transmission systems, alternative support structures, modular high-voltage direct-current generators, diffuser-augmented turbines and small-scale turbine technologies. The future role of advanced multiscale modelling and data availability is also considered. This talk is highlighting that more research will be required to realize many of these emerging technologies. However, there is a dire need to highlight the interactions between fundamental and industrial requirements by properly approaching public and private financing in these emerging wind technologies as industrial growth might outpace further fundamental study earlier than anticipated.
Assoc. Prof. Agnes Xue Lishan
Singapore Institute of Technology，Design and Specialised Businesses
Research Area: Healthcare Innovation
Abstract: The entire landscape of industrial design education has always been about bringing together different disciplines to explore design development, and innovate from a wide variety of disciplinary perspectives. Design Factory@SIT is one such technology innovation centre set up at the Singapore Institute of Technology to adopt much of the fundamentals of industrial design but it is more than offering a degree programme but be the platform for learning, teaching, project innovation and industry collaboration related to products, processes and service design development. Adopting a user-centred model, Design Factory at SIT seeks to help students, faculty, and companies use design-led innovation tools to pilot ideas and build roadmaps towards our changing marketplace. Design Factory@SIT supports applied research, authentic interdisciplinary collaborative learning opportunities for students, and work-place learning continuum. This year Design Factory@SIT kept exploring design, development, and innovation-related issues with local and industry partners with an additional challenge of the pandemic. While the Covid-19 pandemic limited our physical encounters with colleagues, students, and companies, it also enabled us to focus on internal capability building for staff and offer co-creation workshops with identified themes from the university’s new campus. This presents an unprecedented opportunity to create a truly unique and memorable university experience for students and visitors alike. Various environmental design and/or programmatic features of the campus would showcase and testify to the university’s pioneering efforts in innovative university education, such as applied learning pedagogies, industry research projects, nature and heritage and community engagement. A story of this journey and development strategies to achieve such outcomes and ultimately the campus vision will be shared.
Speech Title: Harnessing Design Approaches to Create New Value
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2021 International Conference on Energy, Environment and Engineering Design (EEED2021) http://www.iceeed.org/