Characterization and autonomous control method of abnormal working conditions of super-long flexible suspended solid backfilling scraper conveyor [PDF]
Solid backfilling scraper conveyor is a key equipment of solid backfilling mining technology, and the degree of its high efficiency and intelligence restricts the development of solid intelligent backfilling mining technology.
Bin ZHANG +7 more
core +1 more source
Model predictive control strategy for three-level NPC rectifier–inverter drive system without weighting factor [PDF]
The three-level converter has become the mainstream converter topology because of its good output power quality and high power factor. The three-level dual pulse width modulation frequency speed control system with rectifier–inverter structure has become
Chenwei LIU +4 more
core +1 more source
Research on Tidal Optimization of Voltage Overrun Problem in Photovoltaic Distribution Network With Electrical Energy Router [PDF]
ObjectivesWith the access of high-penetration distributed photovoltaic to the distribution network, the problems of power back-feeding and voltage overrun become more and more serious.
FENG Zining +3 more
core +1 more source
Rare Metals, EarlyView.ABSTRACT Harnessing solar energy for self‐heating presents an effective strategy to suppress surface ice formation. In this paper, we fabricated nano‐silver‐modified multilayer graphene sheets (Ag@MGs) that integrate photothermal and superhydrophobic properties for anti‐icing applications.
Yihan Zhang +7 more
wiley +1 more source
Robust resource allocation algorithm for heterogeneous wireless networkwith SWIPT [PDF]
, 2019 To improve energy efficiency and robustness of heterogeneous wireless networks with wireless information and power transfer,the robust joint transmit power and power splitting resource allocation problem was studied.Based on mini-max probability machine ...
Guoquan LI +4 more
core +1 more source
The Research and Realization of Low Stand-by Power Technology in Colour Television [PDF]
, 2008 当前世界各国，特别是发达国家，都非常注重环保和节能问题，低待机功耗电子设备有望节约非常可观的电力能源。我国是世界上彩色电视机的生产大国，但大部分产品都无法达到低待机功耗的要求，待机功耗在3W以上。本文是基于外销CRT高清晰彩色电视机设计和开发项目的实践基础上，研究和探讨在一定的成本范围内降低CRT彩色电视机待机功耗的设计与实现方法。本文的创新点在于通过正确选用电源技术方案和对MCU供电电路进行优化设计来达到目标，对生产指导有很强的现实意义。 彩色电视机在待机状态 ...
胥进舟
core
Gaoya dianqi, 2023 基于模块化多电平换流器的柔性直流输电在电力传输领域有着广阔的应用前景，而主回路母线的大电流会在功率模块的铁磁框架中产生涡流损耗，导致不必要的温升。因此文中针对柔性直流输电换流阀的功率模块建立电磁模型，对其进行电磁—热耦合仿真分析，得出了涡流损耗和温度的分布特征。根据仿真结果及相关分析，提出了3种改进温升问题的方法，对功率模块设计具有一定的指导意义。最后通过实验验证了仿真结果的真实性和改进方案的有效性，为今后功率模块的设计制造和模块化多电平换流器（modular multilevel converter ...
张艳梅 +5 more
doaj
Design and Implementation of Decision Support System for Economic Operation of Transformer [PDF]
, 2011 电力广泛应用于国计民生各个领域当中，是一种重要的优质二次能源。在电力系统发、供、用电的过程中，存在着巨大的电能损耗，其中变压器的损耗约占电力系统线损的50%左右。在当前国际能源危机的背景下，设法降低变压器的电能损耗，提高电网输电的效率，是电力系统智能电网建设的基本要求，符合国家绿色能源规划的目标。 变压器经济运行节电技术属于知识经济范畴，是一种向智力挖潜、向管理挖潜实施内涵节电的科学方法。变压器经济运行系统建立在变压器经济运行理论的基础上，辅助运行人员确定变压器经济运行方式，具有运算速度快 ...
王永光
core
Gaoya dianqi, 2007 对550kV/4000A SF6 GIS用母线多点接地与单点接地系统中额定运行条件下不同罐体材料、不同壁厚罐体上感应电流、感应电流形成的损耗功率及其阻抗特性进行了分析计算;比较了接地方式、罐体材料及罐体壁厚对损耗功率及母线阻抗特性的影响。分析结果表明:在多点接地系统中,当罐体材料为铝材和不锈钢材时罐体损耗功率随罐体壁厚的增大而减小,罐体材料为锅炉钢时罐体损耗功率几乎不随罐体壁厚变化而变化,当罐体材料为不锈钢材和锅炉钢时的损耗功率分别是罐体材料为铝材时损耗功率的14倍和32倍。在单点接地系统中 ...
魏俊梅, 林莘, 魏长宇
doaj
Economic Evaluation of Post-Combustion CO2 Capture Integration Technology in Natural Gas Combined Cycle Power Plant [PDF]
, 2023 [Introduction] In recent years, natural gas power generation has played an important role in the construction of clean energy system of China. By the end of the "14th Five-year Plan" in 2025, China's gas power installed capacity is expected to hit 150 ...
Daiqi YE +4 more
core +1 more source