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2019 IEEE 3rd International Conference on Green Energy and Applications (ICGEA)最新文献

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Design of the Wire-Line Coring Drill Rod and Static Analysis on Its Joint 钢丝绳取心钻杆的设计及其接头静力分析
Pub Date : 2019-03-01 DOI: 10.1109/ICGEA.2019.8880740
Chang Jianghua, Liu Qingxiu, Xuan Cuihua
The wire-line coring drill rod is easy to vibrate under the influence of gravity in tunnel horizontal hole construction because of its thin wall, the friction between rod and hole wall causes the damage to the rod. The newly developed high strength wire line drill rod adopts the structure which welds the rod and the male and female joints and thickens the male and female joints to improve the strength. Aiming at the present situation that the joint threads of rod are easy to be damaged, an axisymmetric analysis model of the joint is established, After meshing, constraint, load addition and data analysis, the stress distribution of the rod under the pull torsion load and compression torsion load is obtained, and the results shows that the strength of the male and female joints of the rod meets the strength demand. This rod is equipped with ZDY1000G full hydraulic drilling rig, BW-250 mud pump and wire-line coring drilling tool, and their industrial tests with no break of rod or excessive wear of joint were carried out in Baoji Gold Mine and Luming Gold Mine, the cumulative footage of the tests reached 1442.9 m, which verifies the reliability of the rod effectively.
在隧道水平井施工中,钢丝绳取心钻杆由于管壁较薄,在重力作用下容易发生振动,钻杆与管壁之间的摩擦会造成钻杆的损坏。新开发的高强度钢丝钻杆采用了将钻杆与内外接头焊接的结构,并加厚了内外接头,提高了强度。针对拉杆接头螺纹易损坏的现状,建立了拉杆接头轴对称分析模型,经过网格划分、约束、加荷和数据分析,得到了拉杆在拉扭载荷和压扭载荷作用下的应力分布,结果表明,拉杆公、母接头的强度满足强度要求。该抽油杆配用ZDY1000G全液压钻机、BW-250泥浆泵和钢丝绳取心钻具,在宝鸡金矿和鲁明金矿进行了抽油杆无断裂和接头过度磨损的工业试验,试验累计进尺达1442.9 m,有效地验证了抽油杆的可靠性。
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引用次数: 0
Modeling of DC Critical Flashover of Transmission Line Insulator Long String under Windward/Leeward Side non-Uniform Pollution Condition 背风面非均匀污染条件下输电线路绝缘子长串直流临界闪络建模
Pub Date : 2019-03-01 DOI: 10.1109/ICGEA.2019.8880731
Dongdong Zhang, Ni Xijun, Shuzheng Wang
In areas with seasonal wind direction, transmission line insulator surface pollution layer will distribute nonuniformly between windward and leeward sides, performing like a fan shape. Previous studies found that this kind of nonuniform pollution lowers the flashover gradient of insulator. In this paper a continuous work intended for predicting de critical flashover voltage of long insulator string under windward/leeward side non-uniform pollution was presented. This research includes the establishment of a parallel resistance model considering multi-arc, a prediction of dc critical flashover voltage basing on the proposed model, and the verification through various test data from previous artificial tests. Also the corresponding discussion concerning the variation rule of surface residual pollution layer resistance, arc propagation process under different non-uniformities was made. Research results indicate that the proposed model is validated to be feasible to predict the dc flashover voltage of long string insulator with given pollution non-uniformity K and T. Under windward/leeward side non-uniform pollution, the residual pollution layer resistance decreases, causing the electrical property reduction of insulator string.
在有季节性风向的地区,输电线路绝缘子表面污染层在迎风面和背风面之间分布不均匀,呈扇形分布。以往的研究发现,这种不均匀污染降低了绝缘子的闪络梯度。本文介绍了在迎/背风面非均匀污染条件下长绝缘子串临界闪络电压的连续预测工作。本研究包括建立考虑多电弧的并联电阻模型,基于该模型对直流临界闪络电压进行预测,并通过以往人工试验的各种试验数据进行验证。并对不同不均匀度下表面残余污染层电阻、电弧传播过程的变化规律进行了相应的讨论。研究结果表明,在给定污染不均匀性K和t的情况下,所提出的模型对长串绝缘子直流闪络电压的预测是可行的。在迎风/背风面不均匀污染下,残余污染层电阻减小,导致绝缘子串电性能降低。
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引用次数: 0
Hybrid Fuel Cell/Battery Power System Energy Management by Using Fuzzy Logic Control for Vehicle Application 基于模糊逻辑控制的混合燃料电池/电池动力系统能量管理在汽车中的应用
Pub Date : 2019-03-01 DOI: 10.1109/ICGEA.2019.8880770
Pengfei Cui, Axin Ding, Ying Shen, Ya-Xiong Wang
In this work, a fuzzy logic control-based energy management strategy is proposed for a fuel cell (FC)/battery hybrid electric vehicle. The model of the proposed hybrid power system is developed in the environment of MATLAB/Simulink. An energy management according to fuzzy rules is designed to regulate FC working in the high efficiency area and protect it from suffering rapidly changing of load power. The reference power of FC is determined in real-time by accumulating its power increment which performs FC power changing from one operating point to another within the high efficiency area limiting by the maximum power slope. The proposed control effect is compared with a simple logic control strategy in New Europe Driving Cycle (NEDC).
本文提出了一种基于模糊逻辑控制的燃料电池/电池混合动力汽车能量管理策略。在MATLAB/Simulink环境下对所提出的混合动力系统进行了建模。设计了一种基于模糊规则的能量管理方法,以调节FC在高效区的工作,使其免受负载功率快速变化的影响。FC的参考功率是通过累积其功率增量来实时确定的,该功率增量在最大功率斜率限制的高效率区域内实现FC功率从一个工作点到另一个工作点的变化。在新欧洲驾驶循环(NEDC)中,将该控制策略与简单的逻辑控制策略进行了比较。
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引用次数: 7
Current Calculation and Sensitivity Analysis during Distribution Network Closed Transition Transfer 配电网闭式过渡输电电流计算及灵敏度分析
Pub Date : 2019-03-01 DOI: 10.1109/ICGEA.2019.8880785
Qing Fang, A. Abdolkhalig, Liping Ju, Yuwei Li, Yushu Zhang, F. Abusief
This paper presents a new method for calculating the current of closed transition in distribution networks. The methodology used starts by applying the Thevenin equivalent circuit in combination with power flow calculation for calculating the current value and then, the calculated value of current can help in choosing the timing of the closed transition operation. Next, global sensitivity analysis guarantees that the calculated value of the current is not vulnerable to any measurement errors. The proposed method is validated using the case study in Beijing. The validation test case has shown robustness and good numerical accuracy on low-voltage distribution networks.
本文提出了一种计算配电网封闭过渡电流的新方法。所采用的方法是首先应用Thevenin等效电路结合潮流计算计算电流值,然后计算出的电流值可以帮助选择闭合过渡操作的时机。其次,全局灵敏度分析保证了电流的计算值不容易受到任何测量误差的影响。通过北京地区的实例分析,验证了该方法的有效性。验证用例在低压配电网上具有较好的鲁棒性和数值精度。
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引用次数: 0
Potential Reducing CO2 Emission for Ice Cream Industry through Energy Efficiency Improvement in Indonesia 通过提高印尼的能源效率,减少冰淇淋行业二氧化碳排放的潜力
Pub Date : 2019-03-01 DOI: 10.1109/ICGEA.2019.8880772
Widyastuti Kusuma Wardhani, A. F. Lu’ayi, Helmya Hilda Putri Fatima
Food needs in Indonesia increase unanimously in line with population growth. The large number of population indicates certain behavioral food consumption especially the preference in ice cream. Ice cream is relatively well balanced, wholesome, easily digestible and delicious food. Sector industry is the third largest sector for using energy under household and transportation. Hence, implementing energy efficiency programs for industry is necessity. The study aims to determine the energy efficiency and its effect in reducing CO2 emission. The study had used the combination of two methods, quantitative and qualitative method. Quantitative method was conducted by using analysis data from field survey, while the qualitative method by interview and study literature. The study discusses about energy efficiency implemented in one of ice cream factory in Indonesia, which can reduce 3 percent of energy consumption and CO2 emission. This attempt gives advantages in economical aspect, environmental aspect, employee morals, compliance, and corporate image.
印度尼西亚的粮食需求与人口增长一致增加。大量的人口表明一定的行为性食物消费,特别是对冰淇淋的偏好。冰淇淋是一种相对均衡、健康、易消化、美味的食品。工业是仅次于家庭和交通的第三大能源使用部门。因此,为工业实施能源效率计划是必要的。本研究旨在确定能源效率及其在减少二氧化碳排放方面的效果。本研究采用定量与定性两种方法相结合的方法。定量方法采用实地调查分析资料,定性方法采用访谈法和文献研究法。本研究讨论了印度尼西亚一家冰淇淋厂实施的能源效率,可以减少3%的能源消耗和二氧化碳排放。这一尝试在经济、环境、员工道德、合规和企业形象等方面都具有优势。
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引用次数: 1
Maintenance Scheduling of Transmission Bays Considering Selective Opportunistic Maintenance Strategy 考虑选择性机会性维修策略的传动箱维修计划
Pub Date : 2019-03-01 DOI: 10.1109/ICGEA.2019.8880749
Bo Xu, Shenzhi Xu, Qingzhen Zhang, Yumin Zhang
Unlike previous research which didn't consider opportunistic maintenance between dependent power equipment in power system, opportunistic maintenance strategy is modeled and the impact of opportunistic maintenance strategy on maintenance scheduling of transmission bays is investigated in this paper. According to the economic dependence within a transmission bay, the concept of selective opportunistic maintenance is proposed. In the selective opportunistic maintenance problem, when the equipment in a transmission bay fails, decisions have to be made on whether other equipment is preventively maintained. Firstly, in order to determine the optimal inspection rates and opportunistic maintenance strategy for power equipment, the availability function of the transmission bay is derived. And then, expected system outage cost incurred from equipment maintenance or failure are quantified. Finally, the system maintenance scheduling model is given, with the goal of minimizing the system outage cost. Case studies on typical transmission bays reveal feasibility of the proposed model.
不同于以往的研究没有考虑电力系统中相互依赖的电力设备之间的机会检修,本文建立了机会检修策略模型,研究了机会检修策略对输电机组检修计划的影响。根据传动舱内的经济依赖性,提出了选择性机会检修的概念。在选择性机会性维护问题中,当一个传动舱内的设备发生故障时,必须决定是否对其他设备进行预防性维护。首先,为了确定电力设备的最优检查率和机会检修策略,推导了传动箱的可用性函数。然后,对设备维护或故障引起的预期系统停机成本进行量化。最后,给出了以系统停机成本最小为目标的系统维护调度模型。对典型传动箱的实例分析表明了该模型的可行性。
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引用次数: 1
A Wind Direction Forecasting Method Based on Z_Score Normalization and Long Short_ Term Memory 基于Z_Score归一化和长短期记忆的风向预报方法
Pub Date : 2019-03-01 DOI: 10.1109/ICGEA.2019.8880774
Chen Hou, Hua Han, Zhangjie Liu, M. Su
The angle between wind direction and wind turbine affects the utilization efficiency of wind power generation. Ideally, the wind power generation efficiency is the highest when wind direction is perpendicular to the wind turbine. However, the wind direction is changing all the time, so it does not always keep perpendicular to the wind turbine. Therefore the efficiency of wind power generation can be improved by adjust the wind turbine perpendicular to wind direction. This paper proposes a wind direction forecasting method based on z _score normalization and LSTM. Z_ score normalization is used to preprocess data of wind direction, then the normalized data is feed to the LSTM neural network to train. The future wind direction is predicted by the trained LSTM neural network to adjust the angle of the wind turbine to make it as close as possible to be orthogonal with the wind direction so that maximize the efficiency of the wind. The experimental results show that the LSTM neural can predict the short-term wind direction angle exactly compared with benchmarks.
风向和风力涡轮机之间的角度影响风力发电的利用效率。理想情况下,当风向与风力机垂直时,风力发电效率最高。然而,风向一直在变化,所以它并不总是垂直于风力涡轮机。因此,通过调整垂直于风向的风力机,可以提高风力发电的效率。提出了一种基于z - score归一化和LSTM的风向预报方法。采用Z_ score归一化方法对风向数据进行预处理,然后将归一化后的数据送入LSTM神经网络进行训练。通过训练后的LSTM神经网络预测未来风向,调整风力机的角度,使其尽可能接近与风向正交,使风力效率最大化。实验结果表明,LSTM神经网络能较准确地预测短期风向角。
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引用次数: 11
SOC Balancing Method for Hybrid Energy Storage System in Microgrid 微电网混合储能系统SOC平衡方法
Pub Date : 2019-03-01 DOI: 10.1109/ICGEA.2019.8880766
Hui Wang, Zhenxi Wu, Guangze Shi, Zhangjie Liu
The SOC balancing problem is an important question in energy storage system. Up to now, the SOC balancing control for hybrid-type energy system has not been documented. To deal with the SOC balancing problem for the complex hybrid-type energy storage system. This paper proposes a SOC balance control which uses centralized control for local units in cascaded-type energy storage system and modified droop control to adjust the performance of cascaded-type energy storage system together. In this scheme, regardless of charging mode or discharging mode, the proposed control can work well and the SOC balancing is guaranteed. Finally, the theory analysis and simulation results can prove the correctness and effectiveness of SOC convergence among all storage units in entire system under proposed control.
SOC平衡问题是储能系统中的一个重要问题。目前,混合能源系统的SOC平衡控制尚未见文献报道。研究复杂混合型储能系统的荷电平衡问题。本文提出了一种利用串级储能系统局部单元集中控制和改进下垂控制共同调节串级储能系统性能的SOC平衡控制方法。在该方案中,无论充电模式还是放电模式,所提出的控制都能很好地工作,保证了SOC的平衡。最后,理论分析和仿真结果验证了所提控制下全系统各存储单元SOC收敛的正确性和有效性。
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引用次数: 9
Simulation Study of DFIG Wind Turbine under Grid Fault Open-Circuit 电网故障开路下DFIG风力发电机组仿真研究
Pub Date : 2019-03-01 DOI: 10.1109/ICGEA.2019.8880789
Maimaiti Abulizi, Lirong Xie, Kaifeng Wang
During recent years wind turbine technology has undergone rapid developments. Doubly fed induction generators (DFIG) are very sensitive to the disturbances of grid, the stator of DFIG should be kept connection to the grid faults during period. The flux dynamic response and rotor overvoltage induced by the grid faults and recovery threaten to damage the vulnerable rotor converter. By the from the basic mathematical model doubly-fed generator q-d coordinates reference frame, using the MATLAB/SIMULINK platform to 1.5 MW wind power system simulation model is established. Based on analysis of change of the DFIG stator and rotor flux, voltage, current and active and reactive power, the open-circuit faults of grid and its effect on current and other variables of DFIG were analyzed in the beginning. In the present work, we addressed open-circuits faults of grid situations that have shown their influence on the generator and the behavior of the wind over the defects which are briefly discussed based on simulation results.
近年来,风力发电技术得到了迅速发展。双馈感应发电机(DFIG)对电网的扰动非常敏感,在电网出现故障时应保持定子与电网的连接。电网故障和恢复引起的磁链动态响应和转子过电压对易损坏的转子变流器构成威胁。通过从双馈发电机的基本数学模型q-d坐标参照系出发,利用MATLAB/SIMULINK平台对1.5 MW风电系统建立仿真模型。在分析DFIG定子和转子磁链、电压、电流和有功功率变化的基础上,分析了电网开路故障及其对DFIG电流等变量的影响。在目前的工作中,我们解决了电网开路故障的情况下,已经显示出它们对发电机的影响和风的行为,并简要讨论了基于仿真结果的缺陷。
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引用次数: 1
Optimal Sizing and Placement of Distributed Generation Using Genetic Algorithm Based on Bayesian Network 基于贝叶斯网络的遗传算法优化分布式发电的规模和布局
Pub Date : 2019-03-01 DOI: 10.1109/ICGEA.2019.8880761
K. Wu, Hongtao Wang, B. Zou
This paper focuses on optimal sizing and placement of distributed generation (DG) accessed to distribution system. Considering uncertainty and correlation between wind speed, solar irradiation and load, probabilistic power flow calculation are carried out by Monte Carlo model based on Bayesian network. It saves much computational costs, compared with calculation based on time series. Thus a probability optimization model aimed at minimizing total cost can be proposed with the constraints of voltage and branch power flow. Genetic algorithm with elite retention (GAER) is used to obtain the optimal results. By this model, annual expected generation capacity and cost of DG are estimated in better precision. Branch power flow is proved as one of the main constraints.
本文主要研究了接入配电系统的分布式发电机组的最优规模和布局问题。考虑风速、太阳辐照度和负荷之间的不确定性和相关性,采用基于贝叶斯网络的蒙特卡罗模型进行概率潮流计算。与基于时间序列的计算相比,节省了大量的计算成本。在电压和支路潮流约束下,提出了以总成本最小为目标的概率优化模型。采用精英保留遗传算法(GAER)求解最优解。该模型能够较准确地估算出DG的年预期发电量和成本。分支潮流被证明是主要的制约因素之一。
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引用次数: 4
期刊
2019 IEEE 3rd International Conference on Green Energy and Applications (ICGEA)
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