Abstract A conjugated‐polymer‐based n‐type yarn for thermoelectric textiles is presented. Thermoelectric textile devices are intriguing power sources wearable electronic devices. The use of yarns comprising conjugated polymers desirable because their potentially superior mechanical properties compared to other materials. While several examples p‐type conducting exist, there a lack polymer‐based yarns. Here, regenerated cellulose spray‐coated with an conducting‐polymer‐based ink composed...

The polarization and depolarization current (PDC) measurement has been widely used to assess the aging degree of cross-linked polyethylene (XLPE) cables. However, type identification XLPE cables not fully considered. In this study we conduct PDC on thermal-aged water tree-aged cable samples respectively, upon which a graphical approach insulation condition distinguish is proposed. First, designate evaluation indexes condition, multiple based dielectric parameters are Then, reflect...

Currently employed features for separating partial discharge (PD) pulse signals are proposed based on captured by a particular sensor. If these used to separate PD other sensors, the distribution of may overlap, making it difficult distinguish different signals. To address challenge poor applicability traditional sensors with amplitude–frequency characteristics in signals, this article proposes time–frequency (T–F) feature extraction method t-distributed stochastic neighbor embedding...

Silicone grease (SG) is used for lubrication during cable accessory installation and can penetrate into the silicone rubber (SiR), leading to properties deterioration of SiR. In this study, effects SG on breakdown characteristics cross-linked polyethylene (XLPE)–SiR interface are investigated. First, variation XLPE–SiR voltage with coating time experimentally explored. The significantly increases after applied, remains stable times up approximately 144 h then rapidly decreases; minimum lower...

Partial discharge (PD) test has been widely used in condition assessment for power cables. However, extinguish phenomenon occurred PD detection hinders the effective of potential defects cable accessories. For this reason, a novel method based on thermal excitation is proposed article to eliminate and detect earlier stage. First, physical processes activity reasons extinguishing are introduced. Then, principle mechanism described analyzed respectively, that by external heating break dynamic...

Frequency-tuned resonant (ACRF) test is one of the most widely used technologies for power equipment diagnosis. However, intense interference generated by variable-frequency source hinders its further application in partial discharge (PD) detection. For this reason, an adaptive PD separation method based on improved clustering fast search and find density peaks (CFSFDP) proposed article to separate signals disturbances under ACRF test. First, characteristics from system are analyzed...

Processing in Memory based on memristors is considered the most effective solution to overcome Von Neumann bottleneck issue and has become a hot research topic. The execution efficiency of logical computation in-memory data transmission crucial for Memory. This paper presents design scheme multi-bit multipliers within MAT (a storage set MPU) memristive alternating crossbar array structure. Firstly, improve transfer efficiency, we reserve edge row column as assistant cells OR AND (OA) logic...

Octyl-silane-coated Al2O3 nanoparticles are found to be a promising conductivity-reducing additive for thermoplastic ternary blends comprising low-density polyethylene (LDPE), isotactic polypropylene and styrenic copolymer. The blend nanocomposites were prepared by compounding the components together with an LDPE-based masterbatch that contained nanoparticles. did not affect superior stiffness of blends, compared neat LDPE, between melting temperatures two polyolefins. As result, 38 wt%...

Within substations installed with flexible ac transmission systems, the magnetic flux leakage (MFL) generated by air core reactors in static var compensator (SVC) can be very high. To reduce influence of high field, an optimal suppression method is selected based on fuzzy comprehensive evaluation. First, a series onsite measurements are performed around SVC. From measurement results, low-voltage cables, dc system, grounding grid, and density seriously affected MFL currents few kiloamperes....

Moisture at the insulation interface is main cause for electrical breakdown and failure of cable accessories. However, it still unclear how presence moisture affects discharge development interfacial process. This paper clarifies reasons accessory interfaces under effect moisture. First, characteristics faulty accessories in field are presented. Second, evolution during process dry wet experimentally described. Then, mechanism on explained by combining product analysis electric analysis....

Abstract Cable joints play an important role in the power supply systems, but at same time, they greatly contribute to majority of direct failures. Weak parts cable lines, especially for solid‐solid interfaces joints, attract much attention and are investigated by researchers worldwide. High‐voltage transmission electrical grids requires reliable durable dielectric coatings interface insulation. The breakdown caused local electric field enhancement is a gradual damaging process that leads...

In the previous study, we proposed an adaptive pulse separation algorithm to separate pulse-shaped interferences in frequency-tuned resonant (ACRF) tests. However, interference effect of this was limited long test cable and low amplitude condition. a double-sensor detection method is suppress generated by ACRF systems, realize partial discharge (PD) measurement for equipment. First, transmission characteristics system are analyzed. Then, principle double-sensor-based PD technology...

Variable frequency resonant test is one of the most used methods in power equipment diagnosis. However, severe pulse interference generated by variable source hinders its further application partial discharge (PD) detection. For this reason, a PD separation method based on clustering fast search and find density peak (CFSFDP) proposed to separate signals disturbances under condition. First, characteristics from set are analyzed, which illustrates that distribute throughout all phase position...

To ensure the safety running of power grid, on-line monitoring equipment is essential to compared with traditional periodic maintenance. The existing methods have some limitations. In this paper, a novel method combined low-frequency dielectric loss signal injection into grid proposed. For method, low frequency injected from open triangle side PT. Then factor can be achieved know insulation situation cable. validate effectiveness simulation tests are done. validation, model established in...

Abstract A large number of nonlinear components exist in AC/DC hybrid microgrid, which will cause harmonic pollution and affect power quality. In this paper, according to the diversity, complexity, mutation characteristics harmonics, analysis microgrid is carried out by adding sources. The model diagram built, mathematical parameters harmonics are introduced. Finally, simulation constructed based on ETAP, studied three cases static load equivalent grid using same source.

Abstract It is an important goal of the microgrid control system to realize rational allocation power between AC and DC by using electronic converter integrate renewable energy into distribution system. This paper introduces Virtual Synchronous Generator (VSM) strategy hybrid microgrid, which solves above problems mimicking characteristics traditional Machine (SM). In order better optimize performance AC/DC a novel VSM-based bidirectional (BC) proposed, also ensures capability BC independent...