Due to inherent uncertainty and volatility, large-scale wind power integration brings new challenges the flexible operation of systems. It calls for more flexibility not only from generation side but also grid side, especially hybrid HVAC/HVDC transmission grid. This paper proposes exploit potential by controlling flows through HVDC merits its regulation capability, as well HVAC switching (TS). To synergistically schedule them with generator units, a security-constrained economic dispatch...

As a kind of important engineering material, steel fiber‐reinforced concrete was used widely in civil engineering. Up to now, usually produced by the traditional mixing method. For reason uniform distribution fiber, reinforcement mechanical properties inadequately performed. In this paper, C50 and C60 were manufactured vibratory methods, respectively, then, cube compression test, flexural splitting tensile bending test carried out. The effects analyzed comparing methods. results show that...

This paper investigates a novel mechanism of common mutual fund risk within the Chinese stock market, demonstrating that managers strategically adjust their portfolios to hedge against shared flow risks. These adjustments significantly influence prices, highlighting critical role in market behavior. Utilizing Principal Component Analysis (PCA), study extracts characteristic fluctuations among active funds, referred as "common flow." It calculates each stock's exposure portfolio, denoted...

China’s electricity sector mainly relies on coal-fired thermal generation, thus resulting that nearly 50% of total CO2 emissions coming from the sector. This study focuses provincial generation. Methodologically, Index Decomposition Analysis (IDA), facilitated by Shapley Index, is applied to discover driving factors behind emission changes at level. In addition, Slack-based Model (SBM) used identify which power grids should be allocated with a higher (lower) reduction burden. The IDA results...

For the power system interconnected with large-scale offshore wind through VSC-HVDC, such as SZ grid, it may be engaged transient frequency stability and lack of related control due to randomness, fluctuation intermittence wind. This paper proposes a strategy for VSC-HVDC based on sensitivity. Firstly, structure grid calculation method index are introduced, problems existing in explored. Secondly, mathematical formulation is described, including objective function constraints. Furthermore,...

Due to uncertain nature, large-scale renewable integration, such as wind and solar energy, has challenged secure operation of power systems. With excellent peak clipping valley filling capability, pumped storage is often installed stabilize fluctuation output improve economy system operation. This paper aims at exploiting an approach jointly scheduling generation reserve for wind-solar-pumped systems, taking multiple uncertainties (including output, load change, generator failure) into...

The melamine fiber has been widely used because of its excellent flame retardancy. We tried to fabricate fibers using ionic liquids (ILs) as solvents, formaldehyde resin prepolymer (pre-MF) flame-retardant material, and cellulose the supporter. best ILs for dissolving water-insoluble pre-MF were screened by COSMO-RS, in view richness complexity pre-MF. logarithmic activity coefficients (ln γ) three models calculated evaluate dissolution ability 432 ILs. According results ln γ excess...

This work addresses how vibration stirring, steel-fiber volume ratio, and matrix strength affect the mechanical properties of steel-fiber-reinforced concrete. The goal is to improve homogeneity concrete, which done by comparing concrete fabricated ordinary stirring with that stirring. results show produced mixing are better than those mixing. general trend have a linear relationship ratio steel fiber. best obtained for less 1%. We also established calculation models performance index...

In this paper combines the artificial neural network (ANN) method and internal resistance measuring method, which is designed for lithium-ion battery state of charge (SOC) estimation. It different from general research that only uses voltage current as parameters. The input layer adds important parameters: current, external inputs. We design a recurrent networks (RNN) model with non-linear autoregressive exogenous (NARX). compares difference between simulation results under same benchmark...

Energy storage system (ESS) can provide emergency power support to improving the reliability of distribution grid. Aiming at multi-point grid connection ESS running on peak regulation as long-term scenario, dynamic control method based load prediction is proposed maximize peaking ability. By researching calculation expected SOC energy system, capability index and line fault loss rate are established evaluate improvement effect supply in planning stage. Through analysis output characteristic...

The offshore wind farm is interconnected to the Zhejiang power grid via VSC-HVDC (voltage source converter-based high voltage direct current) lines, while there a risk of subsynchronous oscillation for transmission. This paper presents phenomena and analyzes it with impedance method, simplified system which contains VSC-HVDC. First, corresponding electromagnetic transient model built in PSCAD/EMTDC. And then, proposed presented, characteric SSO analyzed simulation. Furthermore, modeling...

With the development of information and communication technologies, flexible loads have become more popular to participate in two-way interaction between power generation consumption. However, growing proportion has made reliability smart grids different from that traditional systems. In this paper, time-varying load model including been represented by developed Markov process model. Load curtailment shifting considered for loads. Moreover, time-sequential simulation procedures evaluation...

The data center (DC) is a popular candidate for energy management due to its huge consumption and great flexibility potentials. In this paper, the an integrated system with loads of DCs (IESD) addressed, focusing on energy-saving carbon-reduction. First, are introduced as integrations electric cooling loads, IESD modelled based combined cooling, heating, power (CCHP) system. After that, low-carbon economic dispatch model formulated minimize operation cost including supplying carbon trading...

Promoting the transformation of energy structure is important method to realize common prosperity in China. This paper estimates China's transition, explores spatial evolution characteristics coupling and co-ordinated development prosperity, analyzes its driving mechanism. The results show that comprehensive evaluation index coordination degree a steady improvement trend. type between low-degree high-degree coordination. presents allocation pattern high east low west, center south. drive are...

Abstract. This paper provides an in-depth analysis of the latest advancements in image animation, focusing on two prominent models: Motion Representations for Articulated Animation (MRAA) and MagicAnimate. MRAA revolutionizes Generative Adversarial Networks (GANs)-based animation by employing regional descriptors instead traditional key points, significantly enhancing accuracy motion capture segmentation complex articulated movements. MagicAnimate, other hand, utilizes a diffusion-based...

An energy hub (EH), acting as an receiving, converting and storing unit, is one of the most important components in integrated system (IES). How to properly determine optimal configuration EH issue with extensive concerns, subject this work. A mixed integer linear programming model presented for purpose. In order ensure reliable supply under bad operating conditions, credible contingencies some critical branches IES are considered formulating design problem. Three indexes then presented,...

The high-volatility output of intermittent renewable energy has a negative impact on the supply and demand balance system, making system inflexible difficult to absorb large-scale energy. To this end, paper considers unpredictability builds typical scenario probability its based analysis method. On basis, for problems absorption dynamic balance, transmission network flexibility evaluation method is proposed from four requirements fluctuation capacity new output, consumption capacity,...