The 2D limit equilibrium method is widely used for slope stability analysis. However, with the advancement of dump engineering, composite slopes often exhibit significant 3D mechanical effects. Consequently, it importance to develop an effective calculation enhance design and control open-pit engineering. Using formed by mining stope inner in Baiyinhua No. 1 2 coal mine as a case study, this research investigates failure mode establishes spatial shape equations sliding mass. By integrating...

In the paper, H∞ repetitive current control scheme based on active damping along with design method is proposed for three-phase grid-connected inverters inductor-capacitor-inductor (LCL) filters. The aims to reduce harmonic distortion of output currents and achieve better efficiency. introduces capacitor-current-feedback into controller process by proposing an equivalent controlled plant. Additionally, discrete model plant variable computation delay, algebraic expression stable region...

Three-phase phase-locked loops (PLLs) are the most widely used synchronization components in power systems. For common PLL algorithms, there is a tradeoff between filtering capability and dynamic response. In this paper, nonlinear (NLADRC-PLL) based on linear active disturbance rejection controller (LADRC) proposed to largely improve tradeoff, thus simultaneously enhancing With LADRC adopted structures (LADRC-PLL), good response can be achieved. To pursue further improvements both response,...

This paper proposes a small-signal stability analysis method for the three-phase multifunctional grid-connected inverter (MFGCI) system with an unbalanced local load based on impedance modeling. To attenuate imbalance introduced by load, modified power quality-compensation algorithm MFGCI conservative theory is proposed and incorporated into analysis. The model of developed adopting complex space vector to simplify process in this paper. In addition, analysis, it proven that can affect when...

In this paper, a novel low voltage ride-through (LVRT) technique for three-phase grid-connected inverters is proposed. The proposed consists of two parts: nonlinear phase locked loop based on complex-coefficient filters (NLCCF-PLL) and an LVRT control scheme. Generally, the synchronization process performed via PLL with relatively bandwidth, which delays detection sag recovery during process. To accelerate process, NLCCF-PLL adaptive controller gains to improve both filtering capability...

The "3060" plan fully demonstrates the determination of China's economic and social green clean development. As an important secondary energy source, hydrogen has advantages high density, pollution-free, etc. ideal source in future, is final state prepared by electrical through electrolysis water. development renewable production will certainly help to achieve goal carbon peaking neutral. Therefore, grid-connected control strategy unit for weak grid worthy in-depth study. research work this...

Apart from the basic renewable generation function, multi-functional grid-connected inverter (MFGCI) derived traditional could provide ancillary power quality enhancement functions for interfaced grid. However, with multiple integrated into one control system, scheme of MFGCI would become inevitably more complicated and vulnerable to disturbance in distribution networks. Here, a rejecting both steady-state dynamic-state is designed. The proposed includes an inner loop controller improved...

The admittance model for the three-phase AC micro-grid is proposed in paper considering imbalance of local load and active compensation multi-functional grid-connected inverter (MFGCI). By adopting complex variables, unified positive-sequence negative-sequence admittances both load. Moreover, dq transformation based algorithm integrated into according to harmonic linearization principle. theoretical analysis simulation verify accuracy model. also indicates that while adoption can decrease...

With growing generation capacity of permanent magnet synchronous generator (PMSG) wind turbines (WTs), sub -synchronous oscillation (SSO) issues in PMSG-WT system have made an increasingly significant impact on power grid stability. In this paper, by considering the interaction between rotor side converter (RSC) and (GSC), mathematical expression DC link voltage components is deduced. way, internal mechanism SSO source theoretically revealed. Furthermore, coefficient generator, GSC RSC...

In wind turbine applications, the energy storage system (ESS) functions as a stabilizing entity, addressing discrepancies between power output and load demand. The ESS possesses significant advantages: its rapid responsiveness, bidirectional adjustment capabilities, operation unaffected by turbine's operational state. This research examines frequency modulation in turbines assesses ESS's involvement this context. We conducted tests to gauge efficiency ensuring consistent from thwarting...

Three-phase multi-function inverters (TPMFIs) are able to generate active power and improve the qualities of micro-grid simultaneously. However, cope with frequently switching loads in micro-grid, self-adaptive control output TPMFI is also required. Therefore, an improved droop controller proposed this paper. The concludes a modified allocation strategy for TPMFIs quality detection function. By adopting controller, could compensate problems real time self-control at same time. Verified by...

The subject addressed is the fault diagnosis of circuit breaker based on coil current in operating circuit.The characteristics are analyzed at length by extracting eight features.The discretization continuous variables matrix decomposition applied to change features into discrete variables.Followed that, Bayesian algorithm used achieve variables.Finally, accuracy improved verified simulation results.

We comment on a recent paper [D. Schultz et al, Phys. REv. Lett. 90, 015501 (2003)]. argue that highly systematical investigation is needed to determine the most stable structures of both pristine and N-substituted fullerenes.