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A bilevel zonal dispatch strategy considering electric vehicle users' demand response Ji, Zhenya; Zhang, Yuyang; Wang, Zheng; Liu, Lulu; Li, Hao
International Journal of Renewable Energy Development Vol 14, No 4 (2025): July 2025
Publisher : Center of Biomass & Renewable Energy (CBIORE)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.61435/ijred.2025.61159

Abstract

With the growing global energy crisis and environmental problems, the large-scale deployment of electric vehicles (EVs) and various types of distributed renewable energy sources has become an important measure to promote sustainable development in China's power sector. However, the rapid increase in the penetration rate of these distributed resources has gradually increased the operational pressure on distribution networks. To effectively address this issue, this paper proposes a two-layer partitioned optimization scheduling strategy for the distribution network layer and the aggregation layer, considering the price-based demand response of EV users. The upper distribution network layer focuses on its own low-carbon and economic operation, establishing a low-carbon economic optimization scheduling model for the distribution network layer to allocate global resources and formulate energy interaction strategies and constraints between aggregation areas based on this. The lower layer first constructs a comprehensive partitioning scheme considering the electrical distance between nodes, the dispatchable potential of EVs, and the power balance of distributed resources. Then, aiming at the economic operation of the aggregation area itself, it establishes a price-based demand response model for EV users to achieve optimal scheduling of distributed resources in the aggregation layer. This study aims to achieve the economic and low-carbon operation of distribution networks through reasonable scheduling strategies, while meeting the charging needs of EVs and improving the utilization efficiency of distributed resources. Simulation results show that the proposed two-layer scheduling strategy can effectively mobilize distributed resources in the distribution network to meet the needs of system economic operation. After optimization at the distribution network layer, the daily operating cost is reduced from 11,551.88 yuan to 6,220.84 yuan, significantly improving economic benefits. Electric vehicles have achieved a reduction of 21.1% in load peak shaving. In conclusion, the two-layer partitioned optimization scheduling strategy proposed in this paper can effectively utilize distributed resources in distribution networks, reduce operation costs, and achieve economic and low-carbon operation of distribution networks.
Critical discourse analysis of ‘Peringatan Darurat Garuda Biru’ in digital political communications Putra, Dedi Kurnia Syah; Harliantara; Damayanti, Alina Maritsa; Li, Hao
Jurnal Studi Komunikasi Vol. 9 No. 3 (2025)
Publisher : Faculty of Communications Science, Dr. Soetomo University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25139/jsk.v9i3.10809

Abstract

The development of digital technology has changed the landscape of political communication, especially through social media, which has now become the main arena for narrative battles and political meaning production. This study analyses the cyber politics strategy in the ‘Garuda Biru Emergency Warning’ content uploaded by the Instagram account @narasi.tv, as a form of symbolic criticism of the democratic situation in Indonesia. Using a qualitative approach with a critical paradigm, this study applies Teun A. van Dijk's Critical Discourse Analysis combined with classical propaganda theory and digital political communication theory. Data was obtained through the documentation of visual and textual content. This study seeks to answer three main questions: (1) How are political propaganda strategies constructed in the “Peringatan Darurat Garuda Biru” content through visual symbols, diction, and narrative? (2) How does this content shape public opinion and position the media as an actor resisting elite domination? (3) To what extent does social media enable a shift in the production of political discourse from the state to independent media and digital influencers? The results of the study indicate that digital propaganda in this content is constructed through a combination of visual symbols (blue Garuda), authoritative diction (emergency warning), and aesthetic narratives that evoke public emotion. This strategy shapes opinion through affective resonance and demonstrates a shift in symbolic power from the state to independent media and digital actors. This research confirms that social media is not merely a communication tool, but also an arena for ideological contestation and discourse production in contemporary democracy