http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
Hongwei Li,Huabing Wu,Biyu Jiang,Anan Zhang,Wei Fang 대한전기학회 2016 Journal of Electrical Engineering & Technology Vol.11 No.1
Aiming at analyzing the power flow of the distribution systems with distribution transformer (DT) branches and PV nodes, a hybrid three-phase power flow methodology is presented in this paper. The incidence formulas among node voltages, loop currents and node current injections have been developed based on node-branch incidence matrix of the distribution network. The method can solve the power flow directly and has higher efficiency. Moreover, the paper provides a modified method to model DT branches by considering winding connections, phase shifting and off-nominal tap ratio, and then DT branches could be seen like one transmission line with the proposed power flow method. To deal with the PV nodes, an improved approach to calculate reactive power increment at each PV node was deduced based on the assumption that the positive-sequence voltage magnitude of PV node is fixed at a given value. Then during calculating the power flow at each iteration, it only needs to update current injection at each PV node with the proposed algorithm. The process is very simple and clear. The results of IEEE 4 nodes and the modified IEEE 34 nodes test feeders verified the correctness and efficiency of the proposed hybrid power flow algorithm.
이자준(Yi-zijun),장벽월(Zhang-biyue) 동북아시아문화학회 2023 동북아시아문화학회 국제학술대회 발표자료집 Vol.2023 No.10
With the ever-evolving landscape, social media has fostered a dynamic bidirectional flow of information, effectively overturning the traditional top-down communication paradigm. As communication subjects have become increasingly civilianized, the rapid pace of communication, and the proliferation of diverse content have led a growing number of individuals to opt for the social media as their preferred medium for expressing thoughts on current events. social media has progressively assumed the role of a focal point for public discourse, offering Chinese women an expansive platform for unabridged self-expression. The widespread adoption of social media has, in turn, ushered in a novel public domain conducive to the advancement of women’s issues. The amalgamation of technological prowess and heightened accessibility has propelled women’s issues within the realm of social media into the spotlight. The mechanism for generating discourse surrounding women’s issues continues to evolve through discourse practices and self-empowerment initiatives.In addressing this, it becomes essential to foster collaboration among various stakeholders and to enhance media literacy. This collective effort will contribute to the meaningful reconstruction of the value system pertaining to women’s issues within the context of the public sphere. The advent and utilization of communication media have exerted a profound impact on the gender dynamics of society. Communication media not only define modes of communication but also shape the transmission of ideologies, social norms, and values, all of which significantly influence individuals’ thought processes and communication dynamics. Traditional media historically portrayed women in a manner that aligned with prevailing aesthetics in a predominantly male-dominated society. The advent of the Internet has heralded a transformation in both the content and methodology of communication. This transformation has dismantled the notion of information senders holding exclusive access to data, instead fostering a more egalitarian communication environment where both men and women enjoy equal opportunities for discourse at a technical level. This evolution has gradually shifted women from being passive subjects of discourse to active agents with a voice in shaping events.
Li, Hongwei,Wu, Huabing,Jiang, Biyu,Zhang, Anan,Fang, Wei The Korean Institute of Electrical Engineers 2016 Journal of Electrical Engineering & Technology Vol.11 No.1
Aiming at analyzing the power flow of the distribution systems with distribution transformer (DT) branches and PV nodes, a hybrid three-phase power flow methodology is presented in this paper. The incidence formulas among node voltages, loop currents and node current injections have been developed based on node-branch incidence matrix of the distribution network. The method can solve the power flow directly and has higher efficiency. Moreover, the paper provides a modified method to model DT branches by considering winding connections, phase shifting and off-nominal tap ratio, and then DT branches could be seen like one transmission line with the proposed power flow method. To deal with the PV nodes, an improved approach to calculate reactive power increment at each PV node was deduced based on the assumption that the positive-sequence voltage magnitude of PV node is fixed at a given value. Then during calculating the power flow at each iteration, it only needs to update current injection at each PV node with the proposed algorithm. The process is very simple and clear. The results of IEEE 4 nodes and the modified IEEE 34 nodes test feeders verified the correctness and efficiency of the proposed hybrid power flow algorithm.