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Ensuring that electricity systems maintain reliable power supplies is critical to sustaining political support for the low-carbon energy transition. Therefore, it is crucial to analyze the recent electricity disruptions in China and evaluate the government's response. Since 2020, China has faced three unprecedented power outage affecting multiple provinces for weeks. This study investigates the interplay of various factors contributing to China's power crisis and examines the government's policies aimed at addressing immediate issues while advancing broader reforms. Key policy measures involve adjusting the electricity market to allow greater price fluctuations for coal-fired electricity and opening the wholesale market to industrial and commercial users. While this reform is expected to boost market competitiveness, the present market structure falls short of what is likely needed to ensure that power sector dispatch, pricing, and investment can work together to ensure reliable electricity supply in the context of China's transition towards carbon neutrality. To create an advanced, resilient, and flexible renewable energy grid, more intricate reforms across the electricity system, market, regulatory framework, and institutions will be essential. [Display omitted] • Power reliability is critical to keeping political support for energy transition. • A combination of factors led to power curtailments in China in recent times. • Policy responses to address China's power crisis are examined. • Implications of these policy changes are assessed. • An integrated solution framework is recommended. [ABSTRACT FROM AUTHOR]

In order to achieve the goal of a carbon neutral EU by 2050 and meet the climate targets of the Paris Agreement, a sustainable, efficient, competitive and secure energy system needs to be developed. This paper presents the synthesis of sustainable renewable energy supply networks within the EU-27, proposing a stepwise energy transition in the transport and power sectors, achieving a carbon net neutral target by 2050. A multi-period mixed-integer programming model is developed, with the objective of maximizing sustainability net present value, considering different biomass and waste resources for the production of biofuels, renewable electricity, hydrogen, food and bioproducts, employing different types of technologies. The results show that, with further development of existing technologies, the goal of a carbon-neutral EU can be achieved without compromising food production. Wind farms have proven to be the most promising solution at present for the rapid expansion of electricity generation from renewable energy sources, while the importance of solar photovoltaics is increasing over the years, reaching the 43% share of electricity generation from RES in 2050. Moreover, the energy transition within the EU could have a significant positive impact on the economic, environmental and also social aspects of sustainability, with more than 1.5 million new job opportunities created across the EU over the next 30 years. [Display omitted] • Mathematical programming approach for the transition to carbon-neutral EU by 2050. • Critical review of technologies and synthesis of renewable energy supply networks. • Sustainable multi-period selection of locations, products and types of technologies. • Large economic, eco and social benefits if optimization is carried out at EU level. • Carbon-neutral EU can be achieved through further development of technologies. [ABSTRACT FROM AUTHOR]