Thermal power generation undertakes more tasks of peak and frequency regulation in new systems. The load generators is complicated, significant differences exist the mechanical characteristic end winding under different loads. increasingly plays a crucial role within modern operational complexity has increased, revealing variations characteristics synchronous generator conditions. This paper proposes theoretical model for rapid calculation electromagnetic force on stator Different from...

The economic power-dispatching model of a multi-microgrid is comprehensively established in this paper, considering many factors, such as generation cost, discharge power-purchase power sales revenue, and environmental cost. To construct model, interactions between the two microgrids those micro- main grids are considered. Furthermore, particle swarm optimization (PSO) algorithm utilized to solve model. validate effectiveness proposed well solution algorithm, practical project case studied...

As a large number of flexible elements such as distributed power and load are connected to microgrids, the economic improvement microgrids has become an important topic through rational energy distribution. In this paper, scheduling model considering demand for microgrid system under mechanism peak–valley tariff is proposed. A mathematical components proposed determine exchange between main network. Meanwhile, improved War Strategy Optimization (WSO) algorithm investigate three scenarios:...

The optimal economic power dispatching of a microgrid is an important part the new system optimization, which great significance to reduce energy consumption and environmental pollution. should not only meet basic demand supply but also improve benefit. Considering generation cost, discharge purchase electricity sales revenue, battery charging discharging constraints, time joint optimization model for multi-scenario with wind–photovoltaic-load storage proposed in our study. Additionally,...

Abstract In order to solve the collaborative optimization scheduling of multi‐microgrid under high penetration rate new energy, this paper considered energy interaction between micro‐grids in and relationship consumption electricity cost, constructed a model considering both micro‐grid load main grid wind optical storage, proposed objective function based on economic improved Genetic Algorithm (GA). The elite thought catastrophe are used optimize selection operation, particle swarm algorithm...

In order to maximize the promotion effect of renewable energy policies, this paper proposes a capacity allocation optimization method wind power generation, solar and storage in grid planning under different policy objectives. Firstly, based on quantification, grey relation analysis is used calculate correlation degree indicators energy. Further, multi-objective estimation model comprehensively presented. Some highly correlated are transformed into special constraints. And economy stability...

Abstract This paper presents a reliability evaluation method for distribution network with distributed generations considering feeder fault recovery and reconfiguration, mainly addresses issues: 1) insufficient consideration of the characteristics components (DGs) such as time sequences, randomness intermittency; 2) changes in area after access DGs; 3) multi‐dimensional index DGs has not been formed perfectly. Firstly, Markov model components/DGs is established our study. Then,...

In this article, we present a comprehensive analysis on the thermal response characteristics of stator winding insulation under static air-gap eccentricity (SAGE) conditions in synchronous generators. Different from previous studies, article not only takes into account interactions both core-loss-caused heat and copper-loss-caused but also investigates degrading distribution regularities due to SAGE. The whole work is based qualitatively theoretical analysis, finite-element experimental...

Auxiliary drive system is one of the most important parts in diesel locomotives. In order to enhance efficiency, an auxiliary using 3-phase matrix converter and 1-phase proposed for locomotive. A 10 kW prototype implemented feed AC motors system. According different working condition requirements motors, three control methods (constant voltage constant frequency control, variable slip closed loop control) have been employed converter. reverse blocking IGBT applied provide single phase...

A prototype IGBT-based matrix converter supplying an induction motor was constructed in the lab. When indirect space vector modulation on is implemented, it found that real voltage transfer ratio lower than expected one. In order to enhance ratio, adaptive rate regulation method proposed. The can be enhanced by 9.75% using proposed method. disadvantage of also analyzed. applicable load types are given. Simulation results verify theoretical analysis. More experiments will presented near future.

The all-vanadium flow batteries have gained widespread use in the field of energy storage due to their long lifespan, high efficiency, and safety features. However, order further advance application, it is crucial uncover internal mass transfer mechanisms. Therefore, this paper aims explore performance optimization through numerical simulations. A mathematical physical model, which couples electrochemical reactions thermal processes within a novel sector-shape battery, has been established....

The reliability of power electronic devices is paramount importance in practical application. This paper firstly presents detailed fault condition the matrix converter-induction motor drive system. Then a novel protection strategy proposed. key proposed to provide controlled free-wheeling path for currents when happens. By using new strategy, can be reduced zero as soon possible, while safety semiconductors assured. In order avoid unexpected overvoltage fault, clamp circuit still needed. But...

In order to study the vibration wearing regularity and strength failure point of stator end windings before after static rotor eccentricity, three-dimensional electromagnetic forces subsequent mechanical responses are studied in this paper. The force, stress, deformation on winding QFSN-600-2YHG turbo-generator calculated by finite element method (FEM) through an electromagnetic-structure coupling. radial characteristics verified experiments. It shows that same layer is more serious than...

This paper proposed a new type of combined cooling heating and power (CCHP) system, including the parabolic trough solar thermal (PTST) generation gas turbine generation. The energy storage subsystem in PTST unit provides both electrical energy. Based on life cycle method, configuration optimization under eight operation strategies is studied with economy, energy, environment indicators. include FEL, FEL-EC, FEL-TES, FEL-TES&EC, FTL, FTL-EC, FTL-TES, FTL-TES&EC. feasibility each strategy...

Besides the static stator interturn short circuit (SSISC), dynamic (DSISC) may also occur in synchronous generators. However, at present, there is no effective model which can effectively analyze generator characteristics under DSISC and identify fault. To address this issue, paper creatively presents a novel analysis of for first time. The degree position are taken into consideration. Besides, rotor vibration comprehensively analyzed compared SSISC. Further, finite element (FE) calculation...

Abstract Numerous policies have been implemented to advance the growth of renewable energy. Nonetheless, certain not yielded anticipated impact on progression energy development. In order maximize promotion effect policies, this study proposes a capacity allocation optimization method wind power generation, solar and storage in grid planning under different policy objectives. First, based quantification, grey relation analysis (GRA) is used calculate correlation degree indicators Further,...

Abstract Synchronous generators are widely used in power generation systems. Static air-gap eccentricity (SAGE) often occurs synchronous due to the component wear over prolonged operation. This paper presents a comprehensive mathematical model specifically tailored for SAGE fault, incorporating influence of stator slotting. The study thoroughly examines impacts both and varying loads on shaft voltage using developed model. Furthermore, novel method detecting is introduced, leveraging...

Abstract Background The effects of traction forces at different angles on impacted central incisors(ICI)with varying inverted (IA) may be different. objective this study was to analyze the biomechanical force directions (FD) developmentally ICI with multi-angle variations and offer insights guidance for treatment ICI. Methods Three-dimensional finite element method employed simulate clinical scenarios traction. As such, 0.2 N (direction: antero-superior 90°, 100°, 110°, 120°, 130° relative...

Rotor interturn short circuit (RISC) fault is one of the most prevalent types in non‐salient wound‐rotor synchronous generator (WRSG). In paper, theoretical mechanism RISC studied detail. Building upon this understanding, from detection and harm consequences, further work article includes proposing a method analyzing influence on insulation thermal damage. On hand, new for first proposed based phase voltage. The innovatively allows accurate determination both severity location faults. other...

Abstract The development of the carbon market is a strategic approach to promoting emission restrictions and growth renewable energy. As new hybrid power generation systems (HPGS) integrating wind, solar, energy storage progresses, significant challenge arises: how incorporate electricity‐carbon mechanism into planning system capacity. To address this challenge, article proposes coupled wind‐solar‐storage complementary model, aiming maximize complementarity benefits economic efficiency....