This paper presents an inverter parallel system with a corresponding networked control strategy for operations. In this system, all the modules have same circuit configuration and two loops: inner loop is used output voltage regulation, outer accurate power-sharing regulation formulated by weighted power function data. The method low-bandwidth communication employed to achieve superior load-sharing accuracy compared droop-only scheme. addition, good robustness can be obtained in case of...

In general, the integral sliding mode control (ISMC) with an surface would lead to tracking errors under unbalanced and harmonic grid voltage conditions. order eliminate these conditions, multi-resonant items are added conventional in proposed strategy, which can be called multi-resonant-based (MRSMC). A comparison of precision on ISMC MRSMC is analyzed. regulate system powers directly, instantaneous active reactive selected as state variables. Finally, output current harmonics a majority...

Given a graph, like social/computer network or the blogosphere, in which an infection (or meme virus) has been spreading for some time, how to select k best nodes immunization/quarantining immediately? Most previous works controlling propagation (say via immunization) have concentrated on developing strategies vaccination pre-emptively before start of epidemic. While very useful provide insights baseline policies can control infection, they may not be ideal make real-time decisions as is...

The prediction of performance degradation is significant for the health monitoring rolling bearing, which helps to greatly reduce loss caused by potential faults in entire life cycle rotating machinery. As a new method machine learning based on statistical theory, so-cal led multivariable least squares support vector machines (LS-SVM) was developed. However, it unsatisfactory without adequate consideration time variation and data volatility, are notable features obtained series signal from...

This paper presents the development and application of an Active Disturbance Rejection Controller (ADRC) to regulate frequency error for a three-area interconnected power system. As system transmits from one area another, will inevitably deviate scheduled frequency, resulting in error. A control is essential correct deviation presences external disturbances structural uncertainties ensure safe smooth operation ADRC can extract information disturbance input output data actively compensate...

This paper presents two schemes and correlated issues for parallel inverters of distributed generation units in an ac distribution system. The proposed control are based on droop method the form modified weighting power only use communication bus with limited capacity. A potential improvement current sharing can be achieved by introducing data other via network into a conventional scheme. According to transmitted data, Averaged Power Scheme Instantaneous introduced. impact time-delay...

An improved path planning algorithm based on dynamic window approach (DWA) is proposed to optimize real-time paths for agents moving in complex environments with plenty of static and/or obstacles, constraints, and performance constraints. In order improve the accuracy evaluation function adaptability different obstacle environments, weight ameliorated by designing adaptive laws this article. Meanwhile, aiming at defect local minima DWA algorithm, a low-speed steering strategy presented help...

Dual active bridge (DAB) converter has been widely used in electric vehicles (EVs) with the advantages of its simple structure and high performance. Traditional optimization strategies based on triple phase shift (TPS) DAB cannot optimize both soft switching current stress. To overcome this challenge, a comprehensive strategy TPS (TPS-CO) adapted to whole operating range is proposed article. The power range, stress, soft-switching features for are detailed, mathematical model TPS-CO...

Automatic inspection of Mura defects is a challenging task in thin-film transistor liquid crystal display (TFT-LCD) defect detection, which critical for LCD manufacturers to guarantee high standard quality control. In this paper, we propose set automatic procedures detect mura by using image processing and computer vision techniques. Singular Value Decomposition (SVD) Discrete Cosine Transformation(DCT) techniques are employed conduct reconstruction, based on able obtain the differential...

This paper gives an overview of a wide-area measurement system deployed at the distribution level: FNET/GridEye, which consists hundreds sensors, communication and data center. The sensors are utilized to take frequency, voltage phase angle magnitude measurements from ordinary 110 or 220V outlets in offices residential houses. These continuously transmitted center via Internet. Many applications have been implemented monitor large-scale interconnected power grids, interpret grid operation...

With the large-scale centralized penetration of renewable energy represented by wind turbine and photovoltaic power generation, equivalent inertia synchronous torque traditional grids have decreased, which is worsening frequency dynamics threatening stability reliability grids. Virtual generators (VSGs) are a type grid-friendly inverter in microgrids (MGs) that mimic rotational (SGs) to maintain system with increasing electronic converters. In this paper, analysis method one VSG,...

We demonstrate the B-band electroluminescence from high-lying S2 excited state of a single zinc porphyrin molecule with scanning tunneling microscope-induced luminescence technique by using an aluminum tip. The nanocavity plasmon mode is found to be critical for occurrence electroluminescence. When silver tip excite electronically decoupled Ag(100) substrate ultrathin sodium chloride spacer, we only observe Q-band originating radiative decay S1 first state, without any emission due lack...

This paper presents a full digital controlled current-source inverter (CSI) used in AC power source, which may generate sinusoidal currents with adjustable amplitudes and frequencies over wide range, as well various arbitrary waveforms that fundamental sine wave harmonics. A discrete-time sliding mode controller based on novel reaching condition has been applied to control the CSI. The design of surface coefficient is analyzed ensure system will converge zero asymptotically. simple output...

A networked control method for multi-inverter parallel system is proposed in this paper. Current-sharing strategy and communication design are described. TOD (Try-Once-Discarded) scheduling mode used to realize the real-time accurate transmission, Joint algorithm of implemented predict performance with network time-delay. The time-delay bound keep stable quantified buffer area adjust value. Mathematical model built theory both wireless TOD. maximum induced represented by MALI (Maximum...

Abstract Distribution network reconfiguration is a very complex and large-scale combinatorial optimization problem. In reconfiguration, whether an effective solution can be obtained key issue. Aiming at the problems in reconstruction by traditional algorithm, such as long time required, more times of power flow calculation high loss, design algorithm based on improved ant colony for voltage distribution proposed. After analyzing operating characteristics network, topology described...

An inductively coupled wireless power transfer system is proposed in this paper, which designed to comply with the battery’s load characteristics. A loosely transformer high coupling coefficient proposed. heterogeneous compensation topology able switch between constant current and voltage output mode according resistance. The characteristic curve agrees charging of battery a whole cycle. has misalignment range 300 mm where 0.2. 3 kW experimental platform established verify theoretical...

In this paper, a new analysis and design method with quasi-static model for single-phase three-level boost PFC converter is proposed. The sinusoidal time variations of the input voltage current are considered, rather than taking them as constant RMS values. Comparing to traditional method, more reasonable systems which supplied AC sources, control parameters can be restricted into accurate range. Based on system analyzed, 250W experimental prototype designed built accordingly verify validity method.

Electric vehicle charging behavior is random, a disorderly load access to network will impact the power grid planning and operation largely. Firstly, by analysis of vehicles' day trip chains, normal lognormal distribution are used fitting single trip's ending time driving distance, respectively. Then, frequency considered calculated Monte Carol method, electric vehicles under different penetration on original be analyzed subsequently. Followed this section, optimal control strategy based...

The resistor-capacitor-diode (RCD) level shift driving circuit takes advantages of low cost and tunable negative voltage level, therefore, it can satisfy the needs drivers for various types SiC MOSFETs easily. However, since slow startup response conventional RCD shifter, is not suitable double pulse test (DPT). Furthermore, shifter does consider crosstalk problem caused by high switching speed MOSFET in phase leg configuration. This paper introduces a novel circuit. proposed has fast to...

In this paper, a networked control strategy of current-sharing for inverter parallel operation is proposed, which takes instantaneous power as transmission data to equalize the output among inverters. The mathematical model system with time-delay and dropouts built. To describe influence system, allowable adjacent quantified stability analysis method event-driven presented. experimental results demonstrate validity analysis.

In this paper, the sliding mode controller (SMC) based on reference triangular wave (RTW) is presented to obtain a constant switching frequency and remain advantages of traditional SMC. The basic frame operation new control strategy introduced. analysis design for scheme voltage source DC-AC Buck inverter presented. system parameters characteristics are analyzed by an equivalent circuit. relationship between RTW part SMC researched in paper. Finally, proposed method validated experimental results.

HVDC Light has so much outstanding performance that it been highly appreciated by power industry all over the world.After brief introduction and analysis to principle technique characteristics, control modes system of Light, a discussion about applying CSG is presented in this paper. Two models EMTDC are proposed which illustrate potential application CSG. The simulation results show can improve effectively transient stability AC MIDC due its contribution supporting voltage, damping oscillations.

Abstract High-density wireless sensor networks (HDWSNs) perceive environmental information through nodes, connects data to the network, and is widely used in detection, intelligent control, military fields. Since nodes are usually randomly distributed environment have limited energy, ensuring energy supply of these still a difficult problem solve at present. Therefore, how effectively reduce network consumption, improve algorithm efficiency, extend life time main be solved by QoS routing...