The increasing penetrations of renewable energy and electric vehicles bring more uncertainties challenges to the existing power grid. coordinated networked microgrids (MGs) contain distributed generations (DGs) nonrenewable DGs, which will be an important component in future. We formulate optimization problem based on a transactive (TE) framework for schedule upstream network MGs minimize operation cost. management between is operated by distribution system operator (DSO), different from...

Epoxy/Al2O3 composite is widely used in high-voltage gas insulation equipment and cable terminals because of its excellent heat resistance, mechanical properties, dimensional stability. The settlement micrometer alumina (Al2O3) during casting curing epoxy composite, together with the coupling effects high electric field temperature gradient, can significantly affect electrical breakdown behaviors components. In this article, characteristics epoxy/Al2O3 composites under different gradients...

The complex structure of gas-insulated switchgear (GIS) cable terminals leads to serious electric field concentration, which is a frequent fault position high-voltage system. At present, due the differences in frequency bands sensors, various partial discharge detection technologies have certain their scope application and anti-interference performance, resulting low defect rate GIS terminals. In this paper, comprehensive diagnosis scheme proposed, integrates transient earth voltage (TEV),...

With the growing popularity of autonomous electric vehicles (AEVs), optimizing their path-planning and charging strategy has become a critical research area. However, dynamic nature transport networks presents significant challenge when ensuring efficient operation. The use vehicle-to-everything (V2X) communication in vehicular ad hoc (VANETs) been proposed to tackle this challenge. establishing paths with selection remain complex problems. In paper, we propose joint push–pull mode obtain...

Compressive sensing (CS) has been widely used in wireless sensor networks for the purpose of reducing data gathering communication overhead recent years. In this paper, we firstly apply 1-bit compressive to further reduce that each needs send. Furthermore, propose a novel blind CS reconstruction algorithm which outperforms other state-of-the-art algorithms under settings WSN. Experimental results on real datasets demonstrate efficiency our method.

With the popularization of Internet things technology and rise smart grid concept, a lot theoretical research practical exploration have been carried out on intelligent electrical construction at home abroad. Intelligent building is an important outcome application computer in information age, it part power segment grid. Through perfect combination modern high-tech building, creates comfortable, safe, economic, efficient, convenient sustainable development work living environment for user,...

In natural disasters, due to the destruction of ground infrastructure, terminals (GTs) participating in rescue cannot communicate with outside world, so rapid establishment wireless network is crucial for operations. Due its large coverage and deployment, unmanned aerial vehicles (UAVs) are often used emergency communications. this paper, a hovering UAV cruising adopted cooperatively collect data efficiently from GTs. Firstly, locations GTs modeled by Thomas cluster process (TCP) which more...

Polypropylene (PP), with low loss and high dielectric strength, is widely used as for the metallized film capacitor (MFC). The electric aging breakdown of dielectrics under voltage stress a major concern in research on polymer materials. Surface discharge flashover may happen PP between segments MFCs, which can lead to insulation. effects direct fluorination surface charge characteristics films pulse are experimented this paper. experimental results indicated that were strongly correlated...

Abstract Ultrasonic partial discharge detection is a necessary test in GIS handover test, which very significant to detect the internal defects of GIS. This article introduces detail how ultrasonic method applied through case particles are found test. It also fully proves that effective for discovering this case. The experience can provide meaningful subsequent handover, operation and maintenance tests.

GIS cable terminals play an important role in transmission and transformation network, but its frequent explosion disintegration accidents cold weather bring great risks to the stable operation of power system. The temperature distribution terminal has influences on mechanical stress insulation performance. In this paper, based principle heating heat interaction conductor, simulation model internal field is established, characteristics under different loads low-temperature environments are...

In order to study on transformer oil — paper insulation aging based multi-characteristic parameters, especially the acid in oil, this set up four groups of contrast experiments with # 25 and Kraft paper. And then puts forward evaluation methods standards for degree value assessment. The results show that has little correlation aging, but its mutation point can be used as warning threshold failure insulating polymerization, furfural, CO total hydrocarbons are strongly related insulation....

In order to compensate the asymmetrical load currents by star-connected cascade STATCOM, a novel control strategy combining individual phase instantaneous with zero-sequence voltage injection is proposed, which splits whole STATCOM into three single STATCOMs and proper implemented. Besides, an improved deadbeat current tracking method also presented improve dynamic characteristics of current. The effectiveness this algorithm well validated prototype experimental results.

Activation energy, as an intrinsic property to characterize the insulation state of materials, has important applications in aging and life assessment insulating materials. How calculate activation energy epoxy resin accurately how grasp applicability different calculation methods are hot issues current research. At present, main calculating include thermogravimetric method dielectric spectrum method. there some differences physicochemical connotation obtained by these two methods. This...

In this paper, the quantum chemical calculation was applied to obtain effects of DMP-30 contents on molecular orbital energy level distribution anhydride cured epoxy resin. When accelerator is small or appropriate, LUMO and Homo orbitals resin are concentrated around benzene ring; excessive, concentrate monomer molecules that not crosslinked main chain. The electron affinity energies systems under three structures 0.21 eV, 0.18 eV respectively, with little change; band gaps 6.59 6.24 6.41...

According to the statistics of transformer faults in recent ten years, short circuit is primary cause faults, accounting for more than 30%. In this paper, view a heavy gas action event 110kV main transformer, combined with protection action, fault recording diagram analyzed detail, and preliminary conclusion given through simulation analysis. The results show that caused by inter-turn inter-layer transformer. Combined fault, analysis method proposed, relevant technical measures are put...

Epoxy resin is widely used in the field of electrical equipment insulation. In this paper, effects mechanical stress on cohesive energy and level distribution epoxy were investigated. Tensile reduces density accelerates insulation deterioration. On contrary, compressive can restrain The van der Waals interaction plays a more important role changing energy. band gap decreases polarizability increases under tensile stress. Under compression stress, decreases. changes molecular local state...