As a flexible and reliable way for distributed energy consumption integration, the converters-dominated microgrid has attracted more attention recently. Owing to low inertia high nonlinearity of power converters, islanded under large-signal disturbances is easily suffer transient stability problems. To support stable operation microgrid, grid-forming converters are extensively investigated applied. In this paper, an improved equal area criterion (IEAC) proposed analysis simple equipped with...

Microgrid has been rapidly developed for the integration of distributed renewable energy, owing to their superiority flexible operation and high reliability. Without frequency support from main grid, microgrid under islanded operating mode is more likely lose stability in presence large-signal disturbances. However, previous studies mainly focus on weak grid conditions ignore interaction effects between different-type converters. Therefore, this article investigates transient synchronization...

As the crucial interface of renewable energy integration, stable operation power converters under grid faults and external disturbances has become much more important. However, synchronization instability grid-tied inverters been found caused by phase-locked loop (PLL) some critical operating conditions, such as voltage sag, current surge, transmission line faults. Due to strong nonlinearity, transient stability analysis with PLL becomes complicated large-signal perturbations weak...

Multitarget tracking based on multisensor fusion perception is one of the key technologies to realize intelligent driving automobiles and has become a research hotspot in field driving. However, most current autonomous-vehicle target-tracking methods millimeter-wave radar lidar information struggle guarantee accuracy reliability measured data, cannot effectively solve multitarget-tracking problem complex scenes. In view this, distributed multitarget (DMMT) system, this paper proposes method...

Current automatic parking systems often separate path planning and trajectory tracking, increasing complexity failing to meet the needs of autonomous cars. Consequently, this study presents an approach based on Multi-stage Nonlinear Model Predictive Control (MSNMPC) for integrated tracking optimization. The method represents evolution uncertainty parameters over time through a scenario tree, MSNMPC controller with predictive horizon P defines + 1 phases, each specific cost constraint...

In this paper, a new image quality assessment based on structural similarity in shearlet transform domain is presented. The fast digital the pseudo-polar fourier and can represent at different scales directions. correlation indexes between reference distortion are calculated every subbands final of be obtained from weighted sums all subbands. Experimental results show that proposed method has good consistency with subjective human beings improves accuracy prediction.

Stability issue of grid-tied power converters has become a tough obstacle for the integration large-scale renewable energy. In recent years, novel control approach called virtual synchronous generator (VSG) been widely investigated to improve dynamic response and inertia support. However, how guarantee transient stability VSG under large-signal perturbations not fully considered, which results in difficulties parameters selection VSG. this paper, an analytical criterion is proposed VSG,...

An online detection system is designed for gathering machines to solve the problems arise in collating.The consists of industrial digital cameras and control computer form a distributed that uses Ethernet communicate information between host slave computer.Using normalized correlation algorithm image recognition, IPC can recognize defective product, send signals rejection mechanism deliver out unqualified signatures automatically.After repeated tests, promptly identify product such as mixed...

Along with the economic development of China, all industries have faced new opportunities. However, fast automobile industry has also negatively impacted environmental resources, such as petroleum resource consumption and pollution. In order to protect environment travel green, this paper analyzes progress solar energy applied cars clean energy. First all, explains working principle how convert collected into electric store or provide kinetic for car. Further, since loss air resistance car...

In the complex and changeable driving environment, loader's autonomous decision-making planning ability is seriously insufficient, it cannot make predictions about upcoming behaviors based on historical experience current environment like human drivers. view of this, we carry out following research. The research background typical operation mode loader with extremely frequent braking action, core prediction brake pedal aperture for automatic wheel loader. By combining data experienced...

The high proportion of new energy grid connection puts forward higher requirements on the frequency response capability power system. In this paper, based multi-scale morphological filtering method, signal primary regulation negative feedback channel thermal unit is quickly decomposed, corresponding to different time scales inertia, regulation, and secondary regulation. control division realized by setting reasonable coefficient for each band signal, thereby effectively improving unit's...