Current Issue : January-March Volume : 2026 Issue Number : 1 Articles : 5 Articles
With the implementation of China’s “dual carbon” strategy, the installed capacity of new energy has grown rapidly. Wind power and photovoltaic power have accounted for more than 40%, but the integration of power electronic apparatus into the grid has resulted in the manifestation of a system with “low inertia and weak damping”, which can easily lead to transient overvoltage problems at transmitters when high-voltage direct-current (HVDC) latching faults occur. Although a variety of dynamic reactive power optimization strategies have been proposed in the existing research, most of them are aimed at single equipment, and multi-reactive power source collaborative control schemes are lacking. In this paper, we innovatively establish a transient voltage analysis model for a new energy transmitter, derive the expression of overvoltage amplitude, and propose a method for the construction of a multi-reactive source collaborative optimization model, which can effectively suppress transient overvoltage through capacity and initial output configuration. We provide a new idea for the safe operation of a significant percentage of new energy grids. The case analysis shows that the co-optimization method outlined in this paper is an effective solution to suppress the transient overvoltage triggered by AC faults and has wide application value....
This paper analyzes the availability of lithium resources required to support a global decarbonized energy system featuring electrical energy storage based on lithium iron phosphate (LFP) baeries. A net-zero carbon grid consisting of existing nuclear and hydro capacity, with the balance being a 50/50 mix of wind and solar power generation, is assumed to satisfy projected world electrical demand in 2050, incorporating the electrification of transportation. The baery electrical storage capacity needed to support this grid is estimated and translated into the required number of nominal 10 MWh LFP storage plants similar to the ones currently in operation. The total lithium required for the global storage system is determined from the number of nominal plants and the inventory of lithium in each plant. The energy required to refine this amount of lithium is accounted for in the estimation of the total lithium requirement. Comparison of the estimated lithium requirements with known global lithium resources indicates that a global storage system consisting only of LFP plants would require only around 12.3% of currently known lithium reserves in a high-economic-growth scenario. The overall cost for a global LFP-based gridscale energy storage system is estimated to be approximately USD 17 trillion....
The increasing integration of inverter-based renewable energy sources is displacing conventional synchronous generation, resulting in a progressive reduction in system inertia and heightened challenges to frequency stability. This study presents a detailed empirical analysis of the UK electricity grid over a representative 24 h period, utilizing high-resolution datasets that capture grid frequency, energy demand, generation mix, and wholesale market prices. An inertia proxy is developed based on the share of synchronous generation, enabling quantitative assessment of its relationship with the Rate of Change of Frequency (RoCoF). Through the application of change point detection and unsupervised increasing importance of synthetic inertia in maintaining grid resilience under high re- hts for system operators aiming to enhance frequency control strategies and contribute to the formulation of policy and technical standards regarding synthetic inertia provision in future low-inertia power systems....
Yemen faces a critical energy crisis exacerbated by political instability, reliance on fossil fuels, and inadequate infrastructure. However, the country possesses vast untapped renewable energy potential, particularly in solar, wind, biomass, and geothermal resources. This study evaluates Yemen’s renewable energy capacity and synthesizes empirical data from existing reports and studies to analyze solar radiation, wind speeds, biomass availability, and geothermal viability. Key findings reveal exceptional solar potential (1800 - 2200 kWh/m2/year) and significant wind energy prospects (6 - 10 m/s in coastal regions), alongside underutilized biomass and geothermal resources. Despite these merits, challenges such as financial constraints, technological gaps, and governance deficits hinder development. The paper proposes actionable strategies, including policy reforms, private sector incentives, international collaboration, and community engagement, to harness renewable energy for sustainable development. By transitioning to renewables, Yemen can mitigate energy shortages, enhance energy security, and contribute to global climate goals. This research provides critical insights for policymakers and investors committed to addressing Yemen’s energy crisis through scalable and sustainable solutions....
Energy is essential for human survival. Its provision extends beyond access to social services; it is fundamentally a source of existence. Therefore, every government must ensure energy access at affordable rates. In this context, in 1960, the government of Bangladesh planned the construction of a nuclear power plant in Rooppur. Once operational, the plant will have a significant impact on the state, economy, and society. This study aims to explore the Political Economy of the Rooppur Nuclear Power Plant (NPP) by addressing key questions: How was it conceived and developed? What motivated the choice of nuclear power despite the well-known safety concerns of nuclear technology? What indicators influenced the vendor selection? Who are the state and non-state actors involved, and what are their interests? Due to the project’s nature, the study adopts an alternative perspective based on the 3Cs theory of political economy: Collaboration, Conflict, and Cooperation. For developing countries, energy from fossil fuels is the most affordable option; therefore, it is commendable that the Bangladesh government has jettisoned coal-fired power and opted instead for the more sophisticated nuclear power option. The Rooppur NPP project, conceived in 1960, is now nearing completion, thanks to the effort and determination of the government of Bangladesh....
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