Scheduling the recharging of electric vehicle fleets under different scenarios is an important but open problem. One scenario that vehicles travel at speeds in periods since traffic congestion common urban areas nowadays. Therefore, this article, a novel time-dependent routing problem with tolls proposed. If enters peak period, fixed toll needs to be paid A mixed integer linear programming model established and adaptive large neighborhood search (ALNS) heuristic designed solve model. The...

The fault resistance is the key factor to affect travelling waves and performance of travelling-wave-based protections on HVDC transmission lines. In order explain accurately impacts in theory improve computational efficiency existing data at given conditions, this paper proposed a global-sensitivity-based method fast predict new with any other resistance. This was built actual project topology its frequency-dependent nature, derived by infinite-Taylor series phase frequency domain, then...

The time-dependent pollution-routing problem of free pickup and delivery passengers to the airport service (TDFPDS) is an extension problems, arising in flight ticket sales companies for airline airport. consists routing a fleet vehicles order deliver set customers considering traffic congestion, time window constraints, maximum ride constraints. cost function includes fuel consumption driver costs. We provide analytical characterization optimal solutions fixed route propose novel heuristic...

Exploring scientific data is important when dealing with large volumes of data. Scientific often difficult to understand, analyse and learn from due its sheer size complexity. The aim this paper investigate the WOA-BP algorithm for mining. main study on regression prediction performance classification sets obtained by WOA intelligent optimisation after parameter search BP neural networks. specific research work as follows: (1) Combing relevant results at home abroad summarising existing...

In order to meet the grid code of distributed generation and avoid intolerable over-voltage dc-side on occurrence faults at same time, an adaptive voltage support control strategy for low ride-through (LVRT) inverter interfaced distribution (IIDG) is proposed. Firstly, according request German code, basic fault current characteristic IIDG are studied. Then, based analyzing effect reactive power supplied by point common coupling (PCC) voltage, this paper proposed enhance capability IIDG....

In order to eliminate the effects of electromagnetic coupling and parameters uncertainty four-parallel transmission lines on same tower for fault location, this paper proposes a novel parameter self-adaptive location scheme tower. Firstly, decoupling method is proposed lines. Secondly, constructs set linear equations based parallel component before obtain mathematical expressions line parameters. Finally, basis method, observation circulation components after are established realize...

The interactions between various factors and the impedance characteristics of DFIG wind turbines is meaningful. This paper focuses on DQ model Doubly-fed Induction Generator turbine (DFIG), analyzing multi-factor effects characteristics. Firstly, a small-signal considering DC voltage outer loop established. Then, to perform frequency sweep obtain external characteristic curves compare under influencing such as different control structures, parameters, stable operating points. Additionally,...

A static dial-a-ride problem with time windows is investigated, without wait while carrying passengers and maximum ride constraints as the service quality. parallel insertion heuristic based on spatial temporal aspects presented. The proposed algorithm firstly sorts requests earliest pickup decentralization index alternately initializes routes seed requests. Then a insertion-rejected-reinsertion operation performed, in which aspect granular also considered. Simulation results indicate that...

This paper proposes a new decoupling method for time domain analysis of four-parallel transmission lines, and then novel single-terminal fault location scheme temporary arcing faults. By studying on the transient characteristic arc based Mayr model, using Bergeron line equation to calculate voltage wave points along line, can be realized by searching point at which waveform is most similar arc. Owing taking distribution parameters into account having no need any optimization algorithm, has...

du/dt is one of the most important features for voltage travelling waves on occurrence a dc-line fault, and it often used to construct an action criterion Travelling Wave Protection HVDC transmission lines. In order alleviate sharp contradiction between accuracy efficiency in obtaining trend du / dt by traditional simulations, this paper proposed global-sensitivity-based efficient computation method. The global-sensitivity concept derived first, then detailed implementation scheme, which...

In this paper, we investigate a prey predator model system with selective harvest effort on predator, where refuge is considered and taxation utilized as control instrument to protect the population from overexploitation. Conditions which influence positiveness boundedness of solutions are studied. Local stability analysis around all equilibria discussed due variation taxation. Furthermore, global positive equilibrium investigated based Bendixson criterion. By using Pontryagin's maximum...

In this paper, a mathematical model is established to investigate interaction and coexistence mechanism of two-species competition ecosystem with nonlinear intraspecific regulation. The combined dynamic effects maturation delay harvest effort on population dynamics are discussed. Conditions for existence unique interior equilibrium investigated. Positivity boundedness solutions analytically studied. By analyzing associated characteristic equation, local stability the proposed around...

Dial-a-ride problem is one of the public transit services which can provide door-to-door service with shared-ride vehicle. differs from other routing and scheduling problems time windows in that it typically involves service-related constraints such as maximum ride constraints. Most models for dial-a-ride reported literature assume constant travel times. Clearly, ignoring fact between two locations does not depend only on distance traveled, but also day impact application these to real-world...

DIgSILENT/PowerFactory has a rich component library, flexible modeling capabilities, and powerful power system analysis functions widely used worldwide. BPA software is commonly in dispatch planning departments, but problems exist, such as poor flexibility. To automatically import the grid model of into DIgSILENT/PowerFactory, this paper analyzes static dynamic controller models DIgSLENT, provides corresponding relationship between data conversion two simulation software, uses DSL language...

Wave energy is a typical renewable energy, transferred into electric by permanent magnet synchronous generator (PMSG), and integrated in DC form. Thus, this paper proposes switched-capacitor based single-stage multi-port collector for wave energy. A step down converter on proposed as submodule, integrating simplifying the traditional two-stage buck converter. The large electrolytic capacitor voltage eliminated, interleaving employed to achieve high gain power delivery, due complementary...

Abstract The high cost of operation and maintenance (O&M) management has become an important factor hindering the sustainable development wind power industry. Performing accurate condition assessment turbine components to optimize structural design O&M strategy a research trend. However, random varying operating conditions turbines make this problem difficult challenging. A Supervisory Control Data Acquisition (SCADA) system collects signals that contain large amount raw useful...