Summary The application of power electronics is an important trend of power system transformation. This paper introduces the world's first flexible interconnection in 220‐kV urban power grid for the first time. This paper presents the key technologies for this project. Firstly, this paper introduces the concept of flexible interconnection, in which the flexible loop operation mode is proposed. Then, this paper introduces the pilot project of partition flexible interconnection in Beijing, China. The project is to build a new flexible DC interconnection based on back‐to‐back modular multilevel converter technology between 2 subtransmission areas in Beijing power supply grid, in order to enhance stability and security. Finally, the project is comprehensively evaluated based on real project data, in which transient voltage stability, static voltage security, total supply capability, short‐circuit current, and reliability are analyzed. The results have shown the effectiveness of the proposed flexible interconnection in large‐scale urban power grid. This project demonstrates a promising application of advanced power electronics in urban power grid.
KEYWORD: DSM; investment risk; Bayesian risk investment evaluation model; Entropy Weight method; Normalization method. ABSTRACT: The vigorous promotion of DSM is of great significance in improving energy conservation and power system reliability. At present, DSM technology of China has been developed, meanwhile, related projects will be carried out extensively. Therefore, investment risk evaluation for DSM projects of power enterprises is of significant urgency. To begin with we will provide investment risk evaluation system for DSM projects based on characteristics of power utilization in China. Secondly, the improved Bayesian risk investment evaluation model will be established. Compared with traditional Bayesian model, Entropy Weight method will be used to calculate the weight of every index. At the same time, Normalization method has been introduced to normalize the value of indices. Last but not least, analysis of examples is preceded to prove the practicality of the model in this paper and provide a reference for the DSM projects in power enterprises. Evaluation systemAccording to the characteristics of power utilization in China, this paper has separated the benefits and costs of DSM projects into four categories: social benefits, power users, power grid enterprises and power generation enterprises. Based on the four categories, the investment risk evaluation system for DSM projects has been established as shown in Table1.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.
hi@scite.ai
10624 S. Eastern Ave., Ste. A-614
Henderson, NV 89052, USA
Copyright © 2024 scite LLC. All rights reserved.
Made with 💙 for researchers
Part of the Research Solutions Family.