Power system shows increasingly prominent characteristic of 'strong DC and weak AC' at the primary construction stage ultrahigh-voltage AC/DC hybrid power grid. Faults occurring in receiving-end AC grid multi-infeed high-voltage (HVDC) may result simultaneous commutation failures (CFs) short-time huge shortage, which are great threats to stability Owing strong support ability reactive power, rotary inertia, capacity short circuit, synchronous condenser (SC) has received more attention...

It is the inherent feature that high-voltage electrical equipment produces electric field around it. In this article, a wearable intelligent warning system based on measurement proposed to prevent staff from being electrocuted or entering area with high intensity. order meet requirements of lightweight, stable, and antijitter for measurement, sensor double-spherical-shell structure chosen be core system, subsequent signal processing has been developed. Furthermore, influence human body...

The influence of BaO contents on structure and fluid behavior fluorine-free CaO-SiO 2 -B O 3 based melts were examined using molecular dynamic (MD) simulation, rotary viscometer, X-ray diffraction Fourier transform infrared spectroscopy. FTIR results matched well with the MD simulation that addition in melts, more cations provided to balance negative charge [BO 4 ] 5– tetrahedrons, leading structures Si-O B-O aggregated adjacent structural units closely connected, which made complex, so...

Energy storage systems can reduce output fluctuations of distributed power sources and improve their absorption capacity. A modified virtual synchronous control method for energy inverters is proposed to photovoltaic absorption. In response the active oscillation problem in traditional control, external characteristic reactance increased increase system damping coefficient achieve rapid compensation after disturbance. Aiming at reactive allocation it use AC bus voltage as reference value...

The crystal structure and electrocatalytic performance of Ni-based MOFs were controlled by the symmetrical engineering Br functional groups on terephthalic acid ligand.

In this paper we present a stochastic scenario-based model predictive control (MPC) approach for the operation of islanded microgrids with high share renewable energy sources. We require that stored remains within given bounds certain probability using risk-based constraints as convex approximations chance constraints. show risk can generally be cast conic and, unlike constraints, both number and average magnitude constraint violations. Lastly, demonstrate risk-constrained MPC in numerical...

With the development of society, demand for power increases sharply, and peak valley difference load curve will affect quality life generator set. The energy storage system can be used shaving smooth out grid because capacity fast supply. Because high cost, it restricts wide use system, so is very important optimizing allocation. This paper analyses economic benefits battery in distribution network. Through genetic algorithm, considering investment costs optimal value allocation obtained by...

This paper introducesmulti-component Gas Kinetics Scheme(GKS), when dealing with multi-componentsproblem, the assumptions of same temperature and speed are meet at cellinterface among components. The numericalsimulation inclined air/SF 6 interface instability experiment wascarried out SF densitydistribution different time displacement history inclinedinterface feature location presented. numerical simulationresults experimental comparisons show that gas kinetics scheme has a good ability for...

In this paper, a new design of integrated power is presented, which uses modular structure, distributed control system. According to the technical requirements mechanical and electrical test equipment for system, BCT switching supply used. The DC described in detail paper. trial operation proves: high common, stability integration.

This paper involves the preparation of cold bonded carbon bearing pellets metallurgical dust for direct reduction using binder. Investigation reveals that binder is vital concern to pellets. For agglomeration these dust, quick lime displays excellent adhesive ability. The strength with addition 10% and mixing 9% moisture content after 2 h dried are about 700 N over 20 times respectively, which enough charge composite into rotary hearth furnace or kiln. In bonding, (3, 3) simplex lattice...

Abstract Mobile energy storage has the advantages of high mobility, environmental friendliness, and wide application scenarios. It is widely used in important load protection, outdoor emergency power supply, distribution network capacity expansion This paper proposes a multi-objective configuration method for flexibly supporting optimal operation regional networks. aims to address problem multi-mobile grid operation. A optimization model renewable networks been established. combining...

In recent years, large-scale blackouts have occurred in several countries due to the lack of power system analysis and catastrophic failure defensive, which caused a worldwide concern. comparison, Chinese grid has richer set predicted faults more complete fault defense strategy. This article focuses on Brazilian grid. Firstly, similarities differences between terms structure, supply composition, stability characteristics, control strategy are studied. Then, combined with requirement grid,...

In this paper we present a stochastic scenario-based model predictive control (MPC) approach for the operation of islanded microgrids with high share renewable energy sources. We require that stored remains within given bounds certain probability using risk-based constraints as convex approximations chance constraints. show risk can generally be cast conic and, unlike constraints, both number and average magnitude constraint violations. Lastly, demonstrate risk-constrained MPC in numerical...

DC commutation failure has become one of the key factors restricting safe and stable operation AC hybrid power system. When an fault occurs in grid, itself may cause rapid changes angle, voltage, frequency At same time, if also causes failure, impact system caused by superposition makes characteristics grid more complicated serious security stability problems. However, is related to many such as type fault, severity location degree voltage asymmetry, support capacity operating conditions....