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2022 6th International Conference on Green Energy and Applications (ICGEA)最新文献

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Interleaved Bidirectional Buck-Boost DC-DC Converter Based on Multi-mode Control 基于多模控制的交错双向降压DC-DC变换器
Pub Date : 2022-03-04 DOI: 10.1109/icgea54406.2022.9791947
Fang Liu, Yang Zhao, Ziqun Wu, Wenqiang Wang, Haodong Wang, Hao Li
With the continuous increase of the installed capacity of new energy power generation, the bidirectional DC converter has become a research hotspot. In this paper, the working principle of a non-isolated interleaved bidirectional Buck-Boost DC-DC converter with a wide input voltage range, a wide output voltage range and low ripple of output current is analyzed. Aiming at the problem of increased system loss caused by the loss of phase-shift control soft-switching when the voltage ratios on the primary side and the secondary side do not match, a three-mode switching control strategy is proposed in which the efficiency of the converter is improved by operating the converter in Buck, Boost and Buck-Boost modes. Finally, through matlab/simulink simulation and experiments, the feasibility and effectiveness of the proposed converter topology and control strategy are verified.
随着新能源发电装机容量的不断增加,双向直流变换器成为研究热点。本文分析了宽输入电压范围、宽输出电压范围、输出电流纹波小的非隔离交错双向Buck-Boost DC-DC变换器的工作原理。针对一次侧和二次侧电压比不匹配时移相控制软开关的损耗导致系统损耗增加的问题,提出了一种三模开关控制策略,通过Buck、Boost和Buck-Boost三种模式的工作,提高了变换器的效率。最后,通过matlab/simulink仿真和实验,验证了所提出的变换器拓扑结构和控制策略的可行性和有效性。
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引用次数: 1
An Overview on Condition Monitoring & Health Assessment Techniques for Distribution Transformers 配电变压器状态监测与健康评估技术综述
Pub Date : 2022-03-04 DOI: 10.1109/icgea54406.2022.9791900
M. Youssef, Rania A. Ibrahim, H. Desouki, M. M. Z. Moustafa
The demand to improve grid infrastructure is of utmost importance especially with the increased expansion and addition of distributed generation units to cope with today’s era of transforming to smart grids. The health status of distribution transformers in an electrical grid plays a vital role in maintaining network service continuity, safety from catastrophic events, and reliability of utility operation. Monitoring transformer’s health is essential for minimizing outages and extending its life in service. Various diagnostic tests and fault detection techniques have developed to effectively support utility operators in predicting failure, estimating life expectancy and condition monitor its status. For these reasons, traditional and advanced methods are required to reduce maintenance time, cost, and help in finding fault causes and location easily. This paper gives a thorough overview about widely used and latest condition monitoring techniques while highlighting strengths and limitations of each.
改善电网基础设施的需求是至关重要的,特别是随着分布式发电机组的扩大和增加,以应对当今向智能电网转型的时代。电网中配电变压器的健康状态对维持电网服务的连续性、抵御灾难性事件的安全性和电力系统运行的可靠性起着至关重要的作用。监测变压器的健康状况对于最大限度地减少停电和延长其使用寿命至关重要。各种诊断测试和故障检测技术已经开发出来,以有效地支持公用事业运营商预测故障、估计预期寿命和状态监测。因此,需要采用传统的维护方法和先进的维护方法,以减少维护时间和成本,并方便地查找故障原因和定位故障。本文全面概述了广泛使用的和最新的状态监测技术,同时突出了每种技术的优点和局限性。
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引用次数: 5
Modelling and Performance Analysis of a Buck Converter Featuring Continuous Input/Continous Output Current for Wind Energy-DC Microgrid 风电-直流微电网连续输入/连续输出降压变换器建模及性能分析
Pub Date : 2022-03-04 DOI: 10.1109/icgea54406.2022.9792031
N. Zakzouk, Rania A. Ibrahim
Small wind-energy-systems (WESs) offer clean and sustainable energy for DC micro grids or standalone applications. Traditional DC/DC converters for bucking WES rectifies voltage to the required level but lacks input current continuity as per conventional buck converters’ properties. This results in high tracked electric power ripples which deteriorates tracking efficiency and enlarges turbine mechanical power and torque fluctuations. The latter vastly impacts turbine performance and safety in standalone operation. In this paper, continuous input-output power buck DC/DC converter is employed in a small WES-DC micro grid. It guarantees input/output current continuity and experiences minimal tracked power ripples which are reflected on the turbine mechanical power. Thus, MPPT efficiency is maximized, and turbine protection is maintained. Moreover, this converter features low inductor/capacitor values with less resistive losses thus enhancing reliability and power conversion efficiency and reducing system size and cost. The considered converter is modelled and implemented using simulation work to validate its effectiveness and superiority over traditional buck converters.
小型风能系统(WESs)为直流微电网或独立应用提供清洁和可持续的能源。传统的buck /DC变换器将电压整流到所需的电平,但根据传统buck变换器的特性,缺乏输入电流连续性。这导致了高跟踪功率波动,降低了跟踪效率,增大了涡轮机的机械功率和转矩波动。后者在独立运行时极大地影响涡轮机的性能和安全性。本文将连续输入输出降压型DC/DC变换器应用于小型WES-DC微电网。它保证了输入/输出电流的连续性,并经历了最小的跟踪功率波动,这反映在涡轮机械功率上。这样,最大限度地提高了MPPT效率,并保持了汽轮机的保护。此外,该转换器具有电感/电容值低、电阻损耗少的特点,从而提高了可靠性和功率转换效率,减小了系统尺寸和成本。本文对该变换器进行了建模和仿真,验证了其相对于传统降压变换器的有效性和优越性。
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引用次数: 1
Urban Planning in Response to Sea Level Rise and Future Urbanization in Southern Florida 南佛罗里达应对海平面上升和未来城市化的城市规划
Pub Date : 2022-03-04 DOI: 10.1109/icgea54406.2022.9791921
Fengming Chen, Mingjian Zhu, Lulu Yuan
The sea level rise and the rapid change of land use have brought great challenges to the urban development and ecological protection in coastal areas. In southern Florida, future urban areas may be inundated due to sea level rise, and there is conflict between urban expansion and wildlife habitat. In order to direct the urban planning and provide habitat for wildlife, the sea level rise scenario should be projected, and priority protected areas need to be identified. With this aim, we used the digital elevation model data to simulate sea level rise in 3 scenarios (0.4m, 0.6m, and 1.0m) and identified areas that would be inundated. We also applied species habitat data and urban planning data from Florida 2070 into the Zonation software to project conservation priority in the study area. Results showed that in 2070, 3.6%, 4.2%, and 6.5% of the urban built-up area would be inundated respectively, under 0.4m, 0.6m, and 1.0m sea level rise scenarios, and priority protected areas are mainly located in Collier, Hendry, Monroe, and Lee counties. Lands suitable for urban planning are mainly located in the north and middle of the study area.
海平面上升和土地利用的快速变化给沿海地区的城市发展和生态保护带来了巨大的挑战。在佛罗里达州南部,由于海平面上升,未来的城市地区可能会被淹没,城市扩张与野生动物栖息地之间存在冲突。为了指导城市规划和为野生动物提供栖息地,应该预测海平面上升的情景,并确定优先保护区。为此,我们使用数字高程模型数据模拟了3种情况下(0.4m, 0.6m和1.0m)的海平面上升,并确定了可能被淹没的区域。我们还将佛罗里达州2070年的物种栖息地数据和城市规划数据应用到Zonation软件中,以确定研究区域的保护优先级。结果表明,在海平面上升0.4m、0.6m和1.0m情景下,2070年城市建成区被淹没的比例分别为3.6%、4.2%和6.5%,重点保护区主要位于Collier、Hendry、Monroe和Lee县。适合城市规划的土地主要位于研究区的北部和中部。
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引用次数: 1
Impacts of Transmission Lines on Tropical Forests – Assessment of the Sociocultural and Environmental Aspects 传输线对热带森林的影响-社会文化和环境方面的评估
Pub Date : 2022-03-04 DOI: 10.1109/icgea54406.2022.9791908
V. O. da Silva, Joao De Paula, André L. Veiga Gimenes, M. Udaeta
The aim of this work is the assessment of social, cultural, and environmental impacts caused by power utilities when building an electric overhead transmission line crossing virgin rainforest. The methodology implies in the systematization of the impacts and the mitigation actions taken, studying the impacts considering the sustainable development and energy planning. The chosen Case Study is a 500 kV-transmission line in the Brazilian Amazon rainforest, crossing a primitive forest and rushing rivers. The results are that the greatest risk is in the political dimension, due to cultural reasons, so this dimension shall be a priority to be considered in future similar projects. The ranking process detailed in this text is not usually applied in the overhead lines planning.
这项工作的目的是评估电力公司在建造穿越原始雨林的架空输电线路时所造成的社会、文化和环境影响。该方法意味着将影响和所采取的缓解行动系统化,并考虑到可持续发展和能源规划来研究影响。所选择的案例研究是巴西亚马逊雨林中的500千伏输电线路,穿越原始森林和湍急的河流。结果表明,由于文化原因,最大的风险在政治维度,因此在未来的类似项目中,这一维度应该是优先考虑的。本文详细介绍的排序过程通常不应用于架空线规划。
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引用次数: 0
Grapeseed Oil's Breakdown Voltage Test for Transformer Oil Feasibility 葡萄籽油在变压器油击穿电压试验中的可行性
Pub Date : 2022-03-04 DOI: 10.1109/icgea54406.2022.9792038
G. Romadhona, W. Winarso, A. Irfandi, Kusnanto Mukti Wibowo, W. S. Fuadi, R. Sapundani, R. Royan
To realize the safety of electricity as stated in the Law of the Republic of Indonesia Number 30 of 2009 Articles 1, 2 and 5 encourage researchers to provide breakthroughs and innovations in the oil used for transformers. Oil that can provide electrical safety is an appropriate oil according to the standards, namely from the electrical side which has a breakdown voltage value of 30 kV at an interval of 2.5 mm. The use of transformer oil in Indonesia still uses Shell Diala B, the oil comes from petroleum where petroleum is not renewable and petroleum waste is classified as a dangerous waste that cause pollution and damage the environment. Plant derived grapeseed oil is a breakthrough and innovation that can be used for transformer oil. The aim of this research is to test the feasibility of grapeseed oil as transformer oil. The finding provides good news, because the results obtained that the breakdown voltage value reaches 71 kV at a temperature of 50 oC - 60 oC, this temperature is the temperature when the transformer operates. With this value in terms of electrical requirements, grapeseed oil is suitable to be used as a substitute for transformer oil that has been used by PLN, namely Shell Diala B which is derived from petroleum.
为了实现印度尼西亚共和国2009年第30号法律中规定的电力安全,第1、2和5条鼓励研究人员在变压器用油方面提供突破和创新。根据标准,能够提供电气安全的油是合适的油,即从电气方面来说,每隔2.5 mm击穿电压值为30kv。印度尼西亚使用的变压器油仍然使用壳牌Diala B,这种油来自石油,石油是不可再生的,石油废物被归类为造成污染和破坏环境的危险废物。植物源性葡萄籽油是一项突破和创新,可用于变压器油。本研究的目的是测试葡萄籽油作为变压器油的可行性。这一发现提供了一个好消息,因为得到的结果是,在50℃- 60℃的温度下,击穿电压值达到71 kV,这个温度是变压器运行时的温度。从电气要求的角度来看,葡萄籽油适合作为PLN公司使用的变压器油的替代品,即壳牌Diala B,它是从石油中提取的。
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引用次数: 0
Modeling and Numerical Analysis of Harvesting Atmospheric Water Using Copper Chloride 利用氯化铜收集大气水的模拟与数值分析
Pub Date : 2022-03-04 DOI: 10.1109/icgea54406.2022.9792134
Sadeem S. Alkinani, M. El-Amin, T. Brahimi
Access to freshwater is becoming increasingly difficult due to a lack of sources, such as lakes, rivers, and groundwater. To resolve water scarcity, Harvesting Atmospheric Water (HAW) has emerged as a promising alternative water source, particularly for arid areas. However, the efficiency of an atmospheric water harvesting system depends on relative humidity, temperature, water sorption capacity based on the adsorption phenomenon, and other factors. This paper aims to develop a mathematical model to simulate and analyze atmospheric water harvesting using copper chloride. The simulation results show that the proposed mathematical modeling predicts well the water content. The water content reaches saturation at different times, depending on the depth. More work is underway to simulate and analyze atmospheric water harvesting using other types of salts, for example, magnesium sulfate and copper sulfate and compare the results with experimental data, as well as conducting sensitivity analysis to explore how depths, porosities, hydraulic conductivities, temperatures, and relative humidity affect moisture absorption.
由于缺乏湖泊、河流和地下水等水源,获取淡水正变得越来越困难。为了解决水资源短缺问题,收集大气水(HAW)已成为一种有前途的替代水源,特别是在干旱地区。然而,大气集水系统的效率取决于相对湿度、温度、基于吸附现象的吸水能力和其他因素。本文旨在建立一个数学模型来模拟和分析利用氯化铜收集大气水的过程。仿真结果表明,该数学模型能较好地预测含水率。含水量在不同的时间达到饱和,取决于深度。更多的工作正在进行中,以模拟和分析使用其他类型的盐(例如硫酸镁和硫酸铜)的大气集水,并将结果与实验数据进行比较,以及进行敏感性分析,以探索深度、孔隙度、水力导电性、温度和相对湿度如何影响吸湿。
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引用次数: 1
Experimental and Simulation Study of Harmonics in Asymmetric Multilevel Inverter Fabricated Using Four Units 四单元非对称多电平逆变器谐波实验与仿真研究
Pub Date : 2022-03-04 DOI: 10.1109/icgea54406.2022.9792023
Ashique Anan Abir, M. Kamal, Md. Imran Prodhan, T. Chakraborty
This research document presents experimental and simulation studies on THD ( total harmonics distortion ) in the output voltage of a single-phase multi-level inverter built with four full-wave bridge inverters connected in cascade. Four MOSFET devices were used for each Hbridge unit. Four independent DC power supplies of different values were connected to the four Hbridge units. Proper gate drive pulses for the 16 MOSFETs of the four Hbridge units to change the switching states were generated on a microcontroller-based Arduino board. Simple microcontroller programming codes was generated to simplify the complex gate control pulses of MOSFETs. It is observed that small number of power switching devices are used to obtain different levels of output voltage. The proposed system was experimentally tested in the laboratory to estimate total harmonic distortion. This experimental study also shows that the THD of the proposed inverter output voltage is decreased when voltage steps at the of the output voltages is increased. The proper switching angles in equal steps has been maintained by using proper drive pulses for power devices to reduce harmonic distortion.
本文对由4个全波桥式逆变器级联组成的单相多电平逆变器输出电压的总谐波失真进行了实验和仿真研究。每个桥单元使用四个MOSFET器件。四个不同值的独立直流电源连接到四个Hbridge单元。在基于微控制器的Arduino板上为四个Hbridge单元的16个mosfet生成适当的栅极驱动脉冲以改变开关状态。生成了简单的微控制器编程代码,简化了mosfet复杂的栅极控制脉冲。可以看出,为了获得不同水平的输出电压,使用了少量的功率开关器件。在实验室中对该系统进行了实验测试,以估计总谐波失真。实验研究还表明,当输出电压阶跃增大时,逆变器输出电压的THD减小。通过对功率器件采用合适的驱动脉冲,以保持适当的等步开关角,从而减小谐波畸变。
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引用次数: 2
The Green Transition of the Energy Industry: How to Define the Role of the Government 能源产业的绿色转型:如何界定政府角色
Pub Date : 2022-03-04 DOI: 10.1109/icgea54406.2022.9791875
Jianfei Shen, Yang Yang, W. Liu, Yi Shen
Speeding up the construction of ecological civilization and promoting the green transformation is an inevitable trend to form a new industrialization path with Chinese characteristics. Therefore, it is essential to focuses the research perspective on government to improve efficiency on green transformation of the energy industry. This study first defines the boundaries of role of government in the transit to a green transformation of energy industry, and then analyses the mechanism of a series of economic policies formulated on the transformation of enterprises in industrial structure upgrading, human capital appreciation as well as the introduction of foreign capital on the basis of technology upgrading from the perspective of the government. The main conclusions are as follows: (1) Government decisions and actions will guide the direction of the green transformation of the energy industry directly or indirectly. (2) Regional heterogeneity has a significant impact on industrial green transformation, government entities need apply valid approach to reduce the unbalanced development of industrial green transformation among different regions. This study has significant theoretical and practical value for governments, considering the regional heterogeneity and different government entities, a coordinated mechanism of law enforcement and supervision is proposed to provide supplements and detailed interpretation to the green transformation policy of the energy industry.
加快生态文明建设,推进绿色转型,是形成中国特色新型工业化道路的必然趋势。因此,将研究视角聚焦于政府,提高能源产业绿色转型的效率是十分必要的。本研究首先界定了政府在能源产业向绿色转型过程中的角色边界,然后从政府的角度分析了在产业结构升级、人力资本增值以及技术升级基础上引入外资等方面制定的一系列企业转型经济政策的作用机制。主要结论如下:(1)政府的决策和行动将直接或间接地引导能源产业绿色转型的方向。(2)区域异质性对产业绿色转型有显著影响,政府需要采取有效措施减少产业绿色转型在不同区域间的不平衡发展。本研究对政府具有重要的理论和实践价值,考虑到区域异质性和政府主体的不同,提出了一种执法与监管的协调机制,为能源产业绿色转型政策提供补充和详细的解释。
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引用次数: 1
Resistance Strategy of Power Cyber-Physical System under Large-Scale and Complex Faults 大规模复杂故障下电力信息物理系统的抵抗策略
Pub Date : 2022-03-04 DOI: 10.1109/icgea54406.2022.9792119
Bo Wang, Zhixiong Zhang, J. Wang, Chuangxin Guo, Jie Hao
In recent years, with the occurrence of climate change and various extreme events, the research on the resistance of physical information systems to large-scale complex faults is of great significance. Propose a power information system to deal with complex faults in extreme weather, establish an anti-interference framework, construct a regional anti-interference strategy based on regional load output matching and topological connectivity, and propose branch active power adjustment methods to reduce disasters. In order to resist the risk of system instability caused by overrun of branch power and phase disconnection, the improved IEEE33 node test system simulation shows that this strategy can effectively reduce the harm of large-scale and complex faults.
近年来,随着气候变化和各种极端事件的发生,物理信息系统对大规模复杂断层的抵抗研究具有重要意义。提出了应对极端天气复杂故障的电力信息系统,建立了抗干扰框架,构建了基于区域负荷输出匹配和拓扑连通性的区域抗干扰策略,提出了减少灾害的支路有功调节方法。为了抵御支路功率超限和断相引起的系统不稳定风险,改进的IEEE33节点测试系统仿真表明,该策略可以有效降低大规模复杂故障的危害。
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引用次数: 0
期刊
2022 6th International Conference on Green Energy and Applications (ICGEA)
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