Timely and accurate fault location in active distribution networks is of vital importance to ensure the reliability power grid operation. However, existing intelligent algorithms applied possess slow convergence speed low accuracy, hindering construction new systems. In this paper, a regional localization method based on an improved northern goshawk search algorithm proposed. The population quality samples was by using chaotic initialization strategy. Meanwhile, positive cosine strategy...

The asymmetric-paths winding is a novel ac with fractional ratio of the number poles to paths, which beneficial for optimized design machines. Resulting from numerous combinations slot-vectors path windings, arrangement low asymmetric degree can hardly be achieved by existing methods. Focusing on optimization arrangements this winding, mathematical model considering two objectives percentage electromotive force error and total harmonic distortion built. In addition, an improved discrete...

Synergetic steric and electron-withdrawing effects enable the fabrication of healable degradable green electrical packaging with robust thermal, mechanical insulating performance.

The transformer state sensing and predictive operation maintenance system can monitor comprehensive multi-type indexes of the under condition no power outage, which ensures stable equipment thus improves stability whole system. Aiming at design problem system, this paper presents interface implementation based on Ant Design Vue. This first introduces business requirements relevant design, then layout key component technology, finally gives interface. By using Vue component, Echarts...

The rapid development of distributed power grids and hybrid electric vehicles has driven the search for new dielectric polymers with enhanced capacitive performance thermal resistance to replace conventional biaxially oriented polypropylene (BOPP). In this study, we present a series novel polycarbonate films prepared through fluorinated triphenyl copolymerization. A self-synthesized benzene was introduced produce low-cost large-scale producible films. Both experimental first-principles...

This paper investigates the characteristics of resulting electromagnetic force asymmetric-paths winding which is a new structure for design stator windings. In addition, novel optimization evaluation considering proposed to reduce fluctuation forces total slots. By validation large hydro-generator, results show that can reflect effectively and optimized presents better performance. provides idea support

Abstract. Automatic building extraction in urban areas has become an intensive research as it contributes to many applications. High-resolution satellite (HRS) imagery is important data source. However, a challenge task extract buildings with only HRS imagery. Additional information and prior knowledge should be incorporated. c A new approach proposed this study. Data sources are QuickBird GIS data. The can provide including position shape information, the image rich spectral, texture...

During the design process of asymmetric-paths winding, optimization between asymmetric degree and tidiness end connections is still a difficulty for existing methods. In this paper, connection indices are proposed evaluation. addition, novel directed graph approach provided optimization. It turns into route graph, including modeling winding searching rules parallel path, matching paths. The hydrogenerator presented validation. results show that optimized scheme presents tidy connection,...

After the power system fails, it is necessary to restore supply important loads as soon possible. For distribution network with multiple black-start units, dividing into subsystems for parallel restoration can speed up of restoration. This paper proposes a model networks via shortest-path-based portioning approach. A partitioning method based on shortest path algorithm introduced, which filters out unimportant load nodes edge by means verification. Based obtained partition scheme,...

The transformer is an important equipment in power system, whose operational reliability of the crucial factor to system stability. intelligent method useful tool identify faults transformer. In this paper, influence for different input models deep belief network fault diagnosis transformers investigated. results show that model which adopts characteristic gasses directly, presents a low identification accuracy. addition, adopted combinations rate high accuracy, and number more, higher...

The transformer is an important equipment in power system, whose operational reliability of the crucial factor to system stability. In addition, knowledge graph effective tool for expression both structure data and unstructured data. this paper, research on fault diagnosis based carried out, influence different methods are investigated. From results, it can be seen that traditional method three ratios presents a good adaptability accuracy diagnosis. inventive cases need quality similar...

The transformer is an important equipment in power system, whose operational reliability of the crucial factor to system stability. characteristic prediction useful direction for health assessment and fault diagnosis transformers. In this paper, transformers based on long short term memory network investigated, comparison effect two input models carried out. results show that effects are almost same, single model a little better. Particularly, CH <inf...

China has experienced a surge in rainstorms, typhoons, and extreme weather events, emphasizing the need to bolster power grid resilience minimize losses. Service restoration for distribution systems is of paramount importance this context. With rapid development distributed resources within systems, energy have emerged as viable option load following outages. Traditional approaches system often treat partitioning distinct decision-making processes, which may result lack synergy between two...

Power quality can be one of the most important indicators for assessing sensitivity new energy intake. With increasing access to renewable sources in power system, issue has become an consideration. This paper proposes identification method based on integrated decision tree identify and analyze perturbations correctly. Firstly, real-time data compound disturbances are collected, through preprocessing as well feature extraction, we obtain a set characteristic vectors. Then, utilizing idea...

With the rising proportion of distributed power access systems, structure whole distribution system is becoming more and complex, uncertainty instability network are increasing. An adaptive simulated annealing particle swarm algorithm for risk level prediction method proposed randomness caused by access. First all, according to grid information management get data, data obtained processing classification level, etc., relevant prediction, accuracy rate 97.3775% prove that in this paper...

The transmission line is a key equipment in power systems, which undertakes the energy work. dynamic capacity enhancement technology useful tool to improve of line. In addition, evaluation current carrying core link technology. Aimed at calculation problem line, this paper, Lasso method proposed and comparison with some traditional methods carried out, such as IEC simplified Morgan method. From results, it can be clearly seen that presents lower error from holistic perspective, good...