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2023 5th Asia Energy and Electrical Engineering Symposium (AEEES)最新文献

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Simulation of the Diffusion Process of SO2 Molecules from SF6 Insulated Electrical Equipment to SO2 Detection Device 二氧化硫分子从SF6绝缘电气设备向二氧化硫检测装置扩散过程的模拟
Pub Date : 2023-03-23 DOI: 10.1109/AEEES56888.2023.10114315
L. Kang, Chen Tunan, Zongjia Qiu, Guoqiang Zhang, Wang Qian
Online monitoring of SF6 decomposition product SO2 gas is an effective method to monitor the internal insulation status of SF6 insulated electrical equipment. However, the measured equipment and monitoring devices can only be connected through a thin tube, the decomposition gas SO2 generated inside GIS takes a long time to reach the monitoring device, which affects the timeliness of detection. In this paper, a gas transfer acceleration measure based on external flow disturbance is proposed, and multi-physical field simulation software is used to simulate and analyze the proposed acceleration measure. In the simulation, gas diffusion and forced convection are considered. The simulation results show that the diffusion process is affected by the diameter and length of the connecting tube under the natural diffusion condition. As the diameter of the connecting tube increases and the length shortens, the diffusion speed increases; The external flow disturbance can effectively accelerate the gas transfer process, and the main influencing factors include flow velocity and disturbance times.
在线监测SF6分解产物SO2气体是监测SF6绝缘电气设备内部绝缘状态的有效方法。然而,被测设备与监测装置之间只能通过一根细管连接,GIS内部产生的分解气体SO2需要较长时间才能到达监测装置,影响了检测的及时性。本文提出了一种基于外部流动扰动的气体传递加速度测量方法,并利用多物理场仿真软件对所提出的加速度测量方法进行了仿真分析。在模拟中,考虑了气体扩散和强制对流。仿真结果表明,在自然扩散条件下,扩散过程受连接管直径和长度的影响。随着连接管直径的增大和长度的缩短,扩散速度增大;外部流动扰动可以有效地加速气体传递过程,影响因素主要有流速和扰动次数。
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引用次数: 0
Multi-objective Charging Station Planning Method Considering Investment Construction Cost and Safe Operation of the Power Grid 考虑投资建设成本和电网安全运行的多目标充电站规划方法
Pub Date : 2023-03-23 DOI: 10.1109/AEEES56888.2023.10114276
Jing Zhang, Linru Jiang, Wen Wang, Ye Yang, Ruohan Wang, Jing Li, Changhai Zhuang
The unreasonable layout of charging stations will increase the investment construction cost of charging stations and affect the safe operation of the power grid. To solve the existing unreasonable charging stations layout problem, this paper proposes a multi-objective layout planning method. Firstly, the Monte Carlo method is used to predict the charging load of electric vehicles (EV) in time and space, and the prediction results are used as the conditions of primary location selection of charging stations. A multi-objective optimization model is established to minimize the comprehensive social cost and network loss. By setting the constraints of the maximum line power and the maximum voltage offset, the safe operation requirements of the power grid are achieved. Secondly, the model is solved by a multi-objective optimization algorithm and the Pareto optimal solution set is obtained. Besides, after eliminating the solutions that do not meet the safety requirements by N-1 running evaluation, the solution with the highest satisfaction is derived by fuzzy theory, which is 3572.38kCNY on comprehensive social cost and 214.35kW•h on network loss respectively. Finally, the feasibility of the model and algorithm is verified by analyzing the results.
充电站布局不合理会增加充电站的投资建设成本,影响电网的安全运行。针对目前充电站布局不合理的问题,提出了一种多目标布局规划方法。首先,利用蒙特卡罗方法对电动汽车充电负荷进行时空预测,并将预测结果作为充电站初步选址的条件;建立了以社会综合成本和网络损失最小为目标的多目标优化模型。通过设置最大线路功率约束和最大电压偏移约束,实现电网的安全运行要求。其次,采用多目标优化算法对模型进行求解,得到Pareto最优解集;通过N-1运行评价剔除不符合安全要求的方案后,运用模糊理论得出满意度最高的方案,即综合社会成本为3572.38kCNY,网络损耗为214.35kW•h。最后,通过对仿真结果的分析,验证了模型和算法的可行性。
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引用次数: 0
Fault Recovery Strategy Of AC/DC Hybrid Distribution Network Based On Improved AntLion Optimizer 基于改进AntLion优化器的交直流混合配电网故障恢复策略
Pub Date : 2023-03-23 DOI: 10.1109/AEEES56888.2023.10114173
Yi Wu, Xiaoqiang Wu, Jian Zeng, Xiaojuan Huang
After fault, the AC/DC hybrid distribution network can be recovered by adjusting VSC control mode and network reconfiguration, which improves the reliability and safety of AC/DC hybrid system fault recovery. The traditional method has not considered the influence of island restoration on fault restoration in AC/DC distribution network. In this paper, a fault recovery strategy for AC/DC distribution network is proposed, which is based on the dynamic coordination between isolated island and main network. First of all, when a fault occurs, select an appropriate VSC control mode, and call the energy storage system and distributed power supply in the fault area to restore power to important loads. Then taking the minimum power loss, the minimum network loss and the minimum number of switching actions as the comprehensive objective function, the ant lion Optimizer with the introduction of disturbance factor is used to obtain the comprehensive restoration strategy for the coordination of islands and the main network. Finally, the 49 node AC/DC hybrid distribution network is analyzed, and the results verify the superiority of the restoration strategy
在交直流混合配电网发生故障后,通过调整VSC控制方式和网络重构,可以实现交直流混合配电网故障恢复,提高了交直流混合配电网故障恢复的可靠性和安全性。传统的方法没有考虑孤岛恢复对交直流配电网故障恢复的影响。本文提出了一种基于孤岛与主网动态协调的交直流配电网故障恢复策略。首先,当故障发生时,选择合适的VSC控制方式,呼叫故障区域内的储能系统和分布式电源,为重要负载恢复供电。然后以最小的功率损耗、最小的网络损耗和最小的切换动作数为综合目标函数,引入干扰因子的蚁狮优化器得到孤岛与主网协调的综合恢复策略。最后,对49节点交直流混合配电网进行了分析,结果验证了该恢复策略的优越性
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引用次数: 0
Quality Inspection Scheduling Problem with Adaptive Hybrid Genetic Algorithm 基于自适应混合遗传算法的质量检验调度问题
Pub Date : 2023-03-23 DOI: 10.1109/AEEES56888.2023.10114364
Tao Xu, You Zhou, Huanjun Chen, Zenan Xie, Jun-Heng Huang
In order to improve the efficiency and accuracy of quality testing of electronic meters, and replace the existing manual scheduling mode, automatic quality inspection job scheduling has become a natural choice for laboratories. However, different from the existing flexible job shop scheduling problem (FJSP), the quality inspection scheduling problem (QISP) has obvious differences in the correspondence between inspection tasks and batches of samples, solution constraints and the problem scale, making the existing scheduling algorithm unable to be directly applied. This paper proposes a new mathematical model for the quality inspection scheduling problem, and an adaptive hybrid genetic algorithm (AHGA). During the decoding operation, several neighborhood search strategies and heuristic rules are presented to ensure the feasibility of the solution. The elite retention strategy is introduced in the selection operation to relieve the loss of high-quality solutions. In terms of genetic operators, a mechanism for adaptive adjustment of operator crossover and mutation probability is designed to balance the global search and local search capabilities. The simulated annealing mechanism is used to speed up the algorithm's convergence and ensure the diversity of the population. Finally, the feasibility of the model and the algorithm is verified on the dataset of a state grid company.
为了提高电子仪表质量检测的效率和准确性,取代现有的人工调度模式,自动质检作业调度成为实验室的自然选择。然而,与现有的柔性作业车间调度问题(FJSP)不同,质量检验调度问题(QISP)在检验任务与样品批次的对应关系、求解约束和问题规模等方面存在明显差异,使得现有的调度算法无法直接应用。本文提出了一种新的质量检测调度问题的数学模型和自适应混合遗传算法(AHGA)。在解码过程中,提出了几种邻域搜索策略和启发式规则,以保证解的可行性。在选择操作中引入精英保留策略,以减少高质量解决方案的流失。在遗传算子方面,设计了算子交叉和变异概率自适应调整机制,平衡全局搜索和局部搜索能力。采用模拟退火机制加快算法的收敛速度,保证种群的多样性。最后,在某国有电网公司数据集上验证了模型和算法的可行性。
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引用次数: 0
Preventive Transmission Maintenance Scheduling against Extreme Weather Events 针对极端天气事件的预防性输电维护计划
Pub Date : 2023-03-23 DOI: 10.1109/AEEES56888.2023.10114373
Weixin Zhang, K. Xie, Bo Hu, Changzheng Shao
Multiple instances of devastation caused by catastrophic natural disasters illustrate the need of strengthening the resilience of power systems. This paper proposes a preventive transmission maintenance schedule (TMS) to enhance power system resilience by improving component health before catastrophes. In the proposed optimization model, transmission line fragility is considered to determine the maintenance plan of defective lines that minimizes load shedding throughout disasters. Using duality theory, the suggested model is further transformed from a tri-level to a bi-level optimization problem. The column-and-constraint generation (C&CG) algorithm is used to tackle the corresponding robust optimization problem. Finally, the suggested model and solution technique are implemented on the modified IEEE RTS-79 system. The significant cost reductions and increased resilience verify the effectiveness of the suggested model.
灾难性自然灾害造成的多次破坏表明,需要加强电力系统的恢复能力。本文提出了一种预防性输电维护计划(TMS),通过在灾难发生前改善部件的健康状况来增强电力系统的恢复能力。在提出的优化模型中,考虑了输电线路的易损性,以确定故障线路的维护计划,从而使灾害期间的减载最小化。利用对偶理论,进一步将该模型由三层优化问题转化为两层优化问题。采用列约束生成(C&CG)算法解决相应的鲁棒优化问题。最后,在改进后的IEEE RTS-79系统上实现了该模型和求解技术。成本的显著降低和弹性的增强验证了所建议模型的有效性。
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引用次数: 0
Research on New Energy Operation Credible Capacity Evaluation and It’s Influence on New Energy Accommodation 新能源运行可信容量评价及其对新能源适应性的影响研究
Pub Date : 2023-03-23 DOI: 10.1109/AEEES56888.2023.10114134
Jixian Qu, Wenhui Shi, Weikang Shan, Zhankui Zhang, H. Bai
The existing credible capacity of new energy mainly studies the comprehensive contribution of annual credible capacity of new energy to the reliability of power system from the perspective of sufficiency at the planning level. This paper establishes the available capacity probability model of wind power and PV power based on the probabilistic forecast, and calculates the operation credible capacity of new energy at every time under the same reliability level, and analyzes the influence factors of operation credible capacity. Besides, this paper establishes the time sequence simulation model which included the operation credible capacity into the start-up schedule of conventional units, and the new energy accommodation before and after the inclusion was calculated. The results show that, in the example, after incorporating the operation credible capacity of new energy into the unit start-up plan, compared with the traditional method, the utilization rate of new energy has increased from 93% to 95%.
新能源现有可信容量主要从规划层面的充分性角度研究新能源年可信容量对电力系统可靠性的综合贡献。本文在概率预测的基础上,建立了风电和光伏发电的可用容量概率模型,计算了相同可靠性水平下新能源各时刻运行可信容量,并分析了运行可信容量的影响因素。建立了将运行可信容量纳入常规机组启动计划的时序仿真模型,并计算了纳入前后的新能源容纳量。结果表明,在实例中,将新能源运行可信容量纳入机组启动计划后,与传统方法相比,新能源利用率从93%提高到95%。
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引用次数: 0
Study on Electromagnetic-Thermal Simulation of 10kV Air Insulated Switchgear 10kV空绝缘开关柜电磁热仿真研究
Pub Date : 2023-03-23 DOI: 10.1109/AEEES56888.2023.10114076
G. Sun, Sixiang Chen, Baiquan Chen, Yijun Liu, Bangfa Chen, Hengzheng Li, Richao Deng, Anzhi Fu
In recent years, 10kV air-insulated switchgear is gradually replacing SF6 gas-insulated switchgear. In the long-term operation of the air insulated switchgear, high temperature will lead to the aging of the insulator and mechanism, resulting in serious consequences. Therefore, it is of great significance to study the temperature rise characteristics of 10kV air-insulated switchgear in different states for the promotion of air-insulated switchgear and the safe operation of power grid. In this paper, the electromagnetic and thermal coupling simulation model is established by using the multi-physical field finite element software COMSOL, and the temperature rise characteristics under normal conditions are analyzed. Then the influence of the contact resistance of circuit breaker on the temperature rise inside the switchgear is analyzed. It is found that the overall temperature rise of the A-phase conductor circuit is slightly higher than that of the other two phases. Under normal operation, the temperature rise of the lower busbar in the phase A is the highest. The increase in contact resistance caused by long-term operation will lead to an increase in temperature rise. If the contact resistance is greater than 337.5μΩ, the temperature rise of the vacuum circuit breaker contact is higher than that of the lower busbar in the phase A. The influence of the contact resistance on temperature rise is linear.
近年来,10kV空气绝缘开关柜正在逐步取代SF6气体绝缘开关柜。在空气绝缘开关柜的长期运行中,高温会导致绝缘子和机构老化,造成严重后果。因此,研究10kV空气绝缘开关柜在不同状态下的温升特性,对于促进空气绝缘开关柜的推广和电网的安全运行具有重要意义。本文利用多物理场有限元软件COMSOL建立了电磁与热耦合仿真模型,分析了正常工况下的温升特性。然后分析了断路器接触电阻对开关柜内部温升的影响。研究发现,a相导体电路的整体温升略高于其他两相。正常运行时,A相下母线温升最高。长期运行造成的接触电阻增大,会导致温升增大。若接触电阻大于337.5μΩ,则真空断路器触点温升高于a相下母线,接触电阻对温升的影响呈线性关系。
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引用次数: 0
Performance Test and Research of Flexible Flat Strip Copper-clad Steel Grounding Electrode 柔性平带覆铜钢接地电极的性能试验与研究
Pub Date : 2023-03-23 DOI: 10.1109/AEEES56888.2023.10114207
Wei Li, Zhizhong Li, Hualin He, Xixiang Wang, Lei Lei
In order to test the performance of flexible flat strip copper-clad steel grounding electrode, the copper-clad steel grounding electrode made by hot melt continuous casting and rolling process was used for testing and research. First, the electrical and mechanical characteristics of two different specifications(30mm×15mm and 30mm×10mm) of grounding electrodes shall be inspected, including surface quality inspection, bending test, copper layer and steel core bonding test, resistivity and relative conductivity inspection, and all parameters shall comply with the provisions of relevant standards; Secondly, the corrosion resistance of the grounding electrode is tested, and the maximum annual average corrosion rate of this copper-clad steel grounding electrode is 0.0068mm/a through electrochemical accelerated corrosion method, which proves that this grounding electrode has excellent corrosion resistance; Finally, the power frequency grounding resistance characteristics of flat strip copper-clad steel grounding grid are simulated and calculated. By comparing the grounding resistance values of galvanized steel, steel, cylindrical copper-clad steel and other different materials under the same size of grounding grid, it is proved that this grounding grid has a certain resistance reduction effect. The test results in this paper can guide the application of this kind of material in power system grounding grid.
为了测试柔性平带铜包钢接地电极的性能,采用热熔连铸连轧工艺制作的铜包钢接地电极进行了试验研究。首先,检查两种不同规格(30mm×15mm和30mm×10mm)的接地电极的电气和机械特性,包括表面质量检查、弯曲试验、铜层和钢芯粘接试验、电阻率和相对电导率检查,所有参数应符合有关标准的规定;其次,对接地电极的耐蚀性进行测试,通过电化学加速腐蚀法,该铜包钢接地电极的最大年平均腐蚀速率为0.0068mm/a,证明该接地电极具有优异的耐蚀性;最后,对平带覆铜钢接地网的工频接地电阻特性进行了仿真计算。通过比较相同尺寸接地网下镀锌钢、钢、圆柱形铜包钢等不同材料的接地电阻值,证明该接地网具有一定的降阻效果。本文的试验结果对该材料在电力系统接地网中的应用具有指导意义。
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引用次数: 0
Analysis and Modeling of Campus Electric Water Heater Energy Consumption 校园电热水器能耗分析与建模
Pub Date : 2023-03-23 DOI: 10.1109/aeees56888.2023.10114077
Zhuolin Cao, Qi Wang, Xiaoyang Ji, Xingyu Zhou, Haohui Ding
The popularity of higher education in China has significantly increased campus energy consumption. The main energy consumption is students’ use of electric water heaters (EWH)to heat household water on campuses. Analyzing and modeling students’ hot water use behavior will greatly help the research of campus water-saving and energy-saving strategies. Based on the measured data of a university in China, this study investigated the variation of students’ hot water use behavior varies by season, day of the week, time of year, and built a shower model. This study aims to determine the optimal heating strategy by using the CPLEX solver and considering the hot water supply mode of central heating distributed to each dormitory. This strategy increases consumer comfort while lowering electricity purchasing expenses for service providers.
高等教育在中国的普及大大增加了校园能源消耗。主要的能源消耗是学生使用电热水器(EWH)来加热校园生活用水。对学生热水使用行为进行分析和建模,将有助于校园节水节能策略的研究。本研究以国内某高校的实测数据为基础,研究了不同季节、不同工作日、不同时段学生热水使用行为的变化,并建立了淋浴模型。本研究的目的是利用CPLEX求解器,在考虑集中供热分配到每个宿舍的热水供应方式的情况下,确定最优供暖策略。这一策略提高了消费者的舒适度,同时降低了服务提供商的购电费用。
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引用次数: 0
Research Progress and Development Trend of Reducing the Influence of Frequency Mutation on Power Grid 降低频率突变对电网影响的研究进展及发展趋势
Pub Date : 2023-03-23 DOI: 10.1109/AEEES56888.2023.10114079
Zhuoyao Chen, Sipeng Hao, Menglin Cui
Under the background of the accelerating economic development, the traditional power grid and the production development of modern society have been difficult to meet the needs of modern society. Therefore, in order to better improve the timeliness of power grid management, it is necessary to integrate the current big data and information technology into the power grid management to strengthen the timeliness of fault detection and maintenance in the process of real-time monitoring. So as to provide more reliable power supply for daily production and life. This paper will analyze the research progress and development trend of reducing the impact of frequency mutation on power grid.
在经济加速发展的背景下,传统的电网和现代社会的生产发展已经难以满足现代社会的需要。因此,为了更好地提高电网管理的时效性,有必要将当前的大数据和信息化技术融入电网管理中,在实时监控过程中加强故障检测和维护的时效性。从而为日常生产和生活提供更可靠的电源。本文将分析降低频率突变对电网影响的研究进展和发展趋势。
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引用次数: 0
期刊
2023 5th Asia Energy and Electrical Engineering Symposium (AEEES)
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