Photovoltaic (PV) reconfiguration is an effective solution for reducing the hot spot effect caused by partial shadows on PV arrays. This paper proposed efficient atom search optimization- (ASO-) based method. The analysis and comparison with other four methods were performed three evaluation criteria, which are mismatch loss, fill factor, standard deviation, respectively. conclusion can be drawn that efficiency, rapidity, reliability of ASO superior to those methods. Besides, a moving cloud...

In the context of new power systems, reasonable capacity optimization multiple systems can not only reduce carbon emissions, but also improve system safety and stability. This paper proposes a situation awareness-based strategy for wind-photovoltaic-thermal establishes bi-level model optimization. The upper-level considers environmental protection economy, carries out multi-objective planning solution with objectives minimizing emissions total cost over whole life cycle system, further...

Currently, the integration of distributed power supply into grid is steadily increasing. The grid’s carrying capacity serves as a crucial metric for evaluating resilience following widespread supply. During typhoon conditions, if experiences line breakage and load loss faults, framework altered, rendering conventional assessment method obsolete. This study introduces assessing risk an index overload probability under integrating transformer constraints to evaluate risk. failure modeled...

The scale of multi-microgrid (MMG) and hydrogen fuel cell vehicles (HFCVs) is increasing dramatically with the increase in new energy penetration ratio, developing an integrated system containing a for brings great challenges to power grid operation. Focusing on difficulties access multiple microgrids low-carbon economic operation system, this paper proposes optimal interconnected heterogeneous power–heat–carbon scheduling strategy hydrogen-fueled vehicles. Firstly, HFCV model established,...

Abstract The special seismic tectonic environment and frequent seismicity in the southeastern margin of Qinghai–Tibet Plateau show that this area is an ideal location to study present movement background strong earthquakes mainland China predict future earthquake risk zones. Studies structural physical characteristics deep structure are helpful explore dynamic effects deformation field characteristics, strengthen our understanding roles anisotropy origin block's interior. In paper,...

Commutation failure (CF) is an inherent drawback of line-commutated converter high-voltage DC (LCC-HVDC) system. And CF prevention (CFPREV) control widely applied in UHVDC lines to mitigate the subsequent CF. However, formation a multi-infeed system induces power exchange and voltage interaction between AC buses during transient process, making behaviors mitigation CFs more complex. Consequently, exploring impact CFPREV on adjacent stations optimizing adapt characteristics necessary....

This paper proposes an optimization model to compute optimal load restoration plan for the transmission network. The objective of this is maximize pickup subject power flow constraints and discrete increment constraints. mix-integer (MIOPF) solved via a branch-and-cut (B&C) framework. nodes in B&C tree are by interior point method. In particular, three cutting planes, namely, Gomory rounding cut, knapsack cover fixing variable incorporated into each node reduce scale sub-tree. can be used...

On August 8, 2017, a magnitude 7.0 earthquake occurred in Jiuzhaigou County, Sichuan Province, China. The deep seismogenic environment and potential seismic risk the eastern margin of Tibetan Plateau have once again attracted close attention seismologists scholars at home abroad. post-earthquake scientific investigation could not identify noticeable surface rupture zones affected area; complex tectonic background reason(s) for frequent seismicity region are unclear. In order to reveal...

The objective of this paper is to theoretically investigate the application superconducting magnetic energy storage (SMES) system in damping power low-frequency electromechanical oscillations. In paper, SMES studied context a single-machine infinite-bus (SMIB) system. mathematical model SMIB including unit established, and Phillips-Heffron control structure described. Based on principle complex torque coefficient (CTC) method, expression electromagnetic entire derived. A nonlinear...

Voltage source converter-based high-voltage direct current (VSC-HVDC) has the advantage of fast and independent controllability on active reactive power. This paper focuses effects commonly proposed power control modes, constant AC voltage margin control. Based mathematical model single machine infinity equivalent system with embedded VSC-HVDC, influence VSC-HVDC different strategies transient stability dynamic is studied. Then case studies were conducted a realistic grid. The responses...

With the increasing scale of power systems and large-scale application new energy technologies, planning construction future grids stable operation face severe challenges. Among them, transient stability short-circuit current are two key factors that determine safe a system. However, in traditional power-grid planning, there is little research on strategy coordinating solution between stability, problems forecasts. Based perspective this study proposes method for optimal system's...

A significant number of Chinese and international earthquake disaster surveys indicate active faults as the root cause earthquakes. Areas along fault lines experience most severe damage a greater personal injuries compared to regions on either side fault. Therefore, by adopting shallow seismic reflection method accurately detect location distribution faults, developing effective measures evade we can reduce economic losses. On April 20, 2013, Lushan Ms7.0 occurred near Shuangshi-Dachuan...

Microgrid has the advantages of low carbon, energy saving and economy. The development direction distribution network is with microgrid. In order to evaluate rationality microgrid planning comprehensively scientifically, this paper establishes a comprehensive evaluation index system from four aspects: economy, reliability, basic structure environmental protection. overcome subjectivity simple Analytic hierarchy process (AHP), AHP- entropy method introduced configure weights indexes, scheme...

Abstract The 2,026 earthquake events registered by the Sichuan regional digital seismic network and mobile array after April 20 th , 2013 Lushan 28,188 pieces of data were selected to determine direct P waves arrival times. We applied tomographic method inverse characteristics velocity structure for three–dimensional (3D) wave in mid‐upper crust source region earthquake. imaging results combined with apparent magnetization inversion magnetotelluric (MT) sounding retest comprehensively study...

This paper presents a new loss-of-field (LOF) protection scheme. Through theory analyses to generator and the power system in LOF event, three characteristics were found: 1) terminal voltage (GTV) decreases faster than high side of step-up transformer(HVSUT) does; 2) reactive output (QO), GTV, HVSUT all decrease; 3) angle exceeds static stability limit (SSL) gradually unless QO reverses. All this are different that oscillation (PSO). Thus corresponding criteria proposed: "voltage change"...