This study presents a novel method of HVDC protection based on the maximal overlap discrete wavelet transform (MODWT) and kurtosis cross correlation coefficient. Compared with (DWT), this does not have data down sampling, can realize fault identification location at same time. According to high frequency content is different under types area, firstly use MODWT four layers traveling wave decomposition, double side decomposed component cross-correlation analysis; subsequently, ratio relations...

This paper presents a study on bioinspired rigid-flexible coupling adaptive compliant motion control of robot gecko with hybrid actuation for space stations. The biomimetic is made rigid trunk, four motor-driven active legs dual-degree-of-freedom shoulder joints, and pneumatic flexible pleated attachment-detachment feet. impedance model consists input parameters: the inertia coefficient, stiffness damping segmented expected plantar force. equipped force sensors mounted its feet, from which...

Bistatic synthetic aperture radar(SAR) consists of a GEO transmitter and low-earth-orbit (LEO) receiver is capable providing higher signal-to-noise ratio (SNR) finer spatial resolution with less power consumption. Due to the complex geometry huge big differences orbital characteristics, system design GEO-LEO BiSAR remains challenge. In this paper, novel method azimuth multichannel proposed. Firstly., radar ambiguity analyzed beam position well designed for high-resolution wide-swath (HRWS)...

As an arboreal animal, tree frogs face diverse challenges when landing on perches, including variations in substrate shape, diameter, flexibility, and angular distribution, with potentially significant consequences for failed landings. Research frog behavior especially concerning vertical substrates, remains limited. This study investigated the strategies (forelimb, abdomen, hindlimb) of considering perch diameter. Although all three were observed across perches different diameters, their...

The rapid progress in global port construction has resulted a significant rise container throughput. As the development of automated terminals continues, it is imperative to enhance intelligence and environmental friendliness Automated Guided Vehicles (AGVs). This paper focuses on addressing AGV path planning problem by employing deep reinforcement learning. primary objectives are optimize data collection efficiency minimize battery consumption. diverse layouts terminal environments...

The traveling wave protection of high voltage direct current (HVDC) transmission lines is susceptible to the influence transition resistance. As a backup protection, differential has absolute selectivity, but usually requires an increase in delay avoid misoperation caused by distributed capacitance on line, resulting longer action time. Based this, two-terminal directional method for HVDC proposed based Sparrow Search Algorithm (SSA)-Variational Mode Decomposition (VMD) and Hilbert phase...

In this paper, the working principle of capacity regulating transformer was analyzed firstly.Based on applying idea connecting with transition resistance, mathematical simulation models were established in Matlab Simulink software.According to calculation under different resistance parameters, and load conditions, paper got final conclusion: voltage fluctuation rate grows up resistors side low increasing but can be barely influenced by transformers high .The when increases.Finally,...

In recent years, domestic renewable energy has developed rapidly, and the total penetration an obvious growth tendency. Considering involvement of wind solar energy, power generation structure traditional hydrothermal will change. Simultaneously, characteristics discontinuous volatile generation, such as climate seasonality, which brings great difficulties to water-solar-hydrothermal system optimization dispatch (WSHTGEPSOD) problem. Recently, a scholar proposed novel crisscross search...

Violet phosphorus quantum dots (VPQDs) have been recently produced to give intense green photoluminescence with excellent stability. Quantum are promising temperature sensors. However, the temperature-dependent of VPQDs is still unexplored. Herein, both steady-state and time-resolved investigated at 263–353 K. With increasing temperature, has demonstrated decreasing intensity, blue shifts, broaden bandwidth reversibility. The non-radiative heat escape was found cause intensity decrease....

Electromagnetic voltage transformer (EVT) is a piece of crucial measurement equipment in power system. However, the core EVT may suffer from deep saturation with excitation power-frequency overvoltage, ferroresonance, DC bias, and energization. Once deeply saturated, secondary might be distorted, relative error can step up to 60%. Thus, system cannot correctly recorded using EVTs. In this paper, we propose method recovering low-frequency primary distorted EVTs through designing LabVIEW Based...

Subsequent commutation failure in high-voltage DC transmission systems seriously emphasizes the safe and stable operation of power systems. Via analyzing mechanism principle voltage-dependent current order limiter (VDCOL), this paper proposes a dynamic nonlinear VDCOL control strategy based on Taylor expansion voltage for suppressing subsequent failure. To solve problem fluctuating command value caused by large drop voltage, constructs that can be dynamically adjusted according to AC bus...

There is a problem in cold rolling line of domestic steel enterprise, which the phenomenon bad cutting-type when it used diameter 407mm bilateral disc shearing to shear thickness 2.82mm strip steel. In this paper, solve by create system model according certain simplified principle,from taking simulation practical operation conditions,we can obtain relationship between force coincidence degree and blade gap,and got affecting relation clearance quality. Finally using theoretical knowledge...

It will be an important way to improve the transportation efficiency of urban rail transit system in future realize cross-line networking on existing line. Cross-line operation bring great challenges data communication subsystem signal system. In order ensure its reliable and stable operation, it is necessary integrate scattered monitoring functions form a complete Combined with current network management, this paper designs architecture, carries out simulation test parameters city...