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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
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
Design of a DC Miniature Solid-State Circuit Breaker and Impact Analysis of Stray Inductance 直流微型固态断路器的设计及杂散电感的影响分析
Pub Date : 2023-03-23 DOI: 10.1109/AEEES56888.2023.10114189
Wenxin Yang, Chuangchuang Tao, Xin Wu, W. Zhuang, Yife Wu, Yi Wu
With the advantages of DC micro-grid becoming increasingly prominent, because the traditional miniature circuit breaker cannot satisfy the requirements of fast breaking, the miniature solid-state circuit breaker has become a good solution. However, the design of miniature solid-state circuit breaker is faced with challenges such as cost, volume, conduction loss, etc. This paper presents a design scheme of DC miniature solid-state circuit breaker and analyzes its working principle. The main circuit uses two parallel SiC MOSFETs as the main devices, reducing the conduction loss. Under fault conditions, the power electronic devices are disconnected at the same time, and the current can be transferred quickly through the buffer absorption branch. The drive circuit and buffer absorption circuit are designed. The simulation model is built in Pspice to analyze the influence of the stray inductance of each branch on the energy generated by turn-off, turn-off speed and turn-off overvoltage. Considering the influence of stray inductance, a prototype of miniature DC solid state circuit breaker is designed. The experimental results show that the circuit breaker can turn off quickly and stably, and the buffer absorption circuit can well suppress the turn-off voltage spike, which verifies the rationality of the design scheme.
随着直流微电网的优势日益凸显,由于传统的微型断路器无法满足快速断路器的要求,微型固态断路器成为了一种很好的解决方案。然而,小型固态断路器的设计面临着成本、体积、导通损耗等方面的挑战。提出了一种直流微型固态断路器的设计方案,并分析了其工作原理。主电路采用两个并联的SiC mosfet作为主器件,降低了导通损耗。在故障情况下,电力电子设备同时断开,电流可通过缓冲吸收支路快速传递。设计了驱动电路和缓冲吸收电路。在Pspice中建立仿真模型,分析各支路杂散电感对关断能量、关断速度和关断过电压的影响。考虑杂散电感的影响,设计了一种小型直流固态断路器样机。实验结果表明,该断路器能快速稳定地关断,缓冲吸收电路能很好地抑制关断电压尖峰,验证了设计方案的合理性。
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引用次数: 0
Study on Small Disturbance Stability of Photovoltaic Grid-Connected Power Generation System 光伏并网发电系统小扰动稳定性研究
Pub Date : 2023-03-23 DOI: 10.1109/AEEES56888.2023.10114185
Jianping Yu, Tian He, Jialong Wu, Jianbing Xu, Da Wang, Yiping Yu
With the increase of the proportion of photovoltaic in the power grid, the voltage level of its connection to the grid is continuously improved, and the influence of grid-connected photovoltaic on the stability of the power system is more and more prominent. To this end, according to the actual topology of photovoltaic power station, the photovoltaic cell, inverter, controller and other components were modeled in detail, and the small signal system model of photovoltaic grid-connected system was established. The detailed derivation process of the model is given, and the representation of state matrix elements is obtained. The modes and damping characteristics of the system are studied by eigenvalue analysis, and the mechanisms of the modes are analyzed by participating factors. The influence of different controller parameters on transient stability is studied by eigenvalue locus method.
随着光伏在电网中所占比重的提高,其并网电压水平不断提高,光伏并网对电力系统稳定性的影响越来越突出。为此,根据光伏电站的实际拓扑结构,对光伏电池、逆变器、控制器等部件进行了详细建模,建立了光伏并网系统的小信号系统模型。给出了该模型的详细推导过程,得到了状态矩阵元素的表示形式。通过特征值分析研究了系统的模态和阻尼特性,并通过参与因子分析了模态的作用机理。采用特征值轨迹法研究了不同控制器参数对系统暂态稳定性的影响。
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引用次数: 0
Dynamic Operation Strategy of Battery Energy Storage System Considering Energy Arbitrage and Frequency regulation 考虑能量套利和频率调节的电池储能系统动态运行策略
Pub Date : 2023-03-23 DOI: 10.1109/AEEES56888.2023.10114236
Shengqi Zhang, Yilin Wang
With the rapid development of battery energy storage systems (BESS) in power system, the multifunctional application of BESS in the energy arbitrage and frequency regulation is regarded as an effective way in improving the economic benefits. However, current operation strategy for BESS cannot fully considered the time-varying demand of energy arbitrage and the randomness of frequency regulation. Thus, this paper proposes a dynamic operation strategy (DOS) by considering the randomness of frequency regulation, and the results of the DOS consist of two core parameters as arbitrage power and droop coefficient. At last, the promising results shown that the BESS DOS can adjust the dispatch priority of BESS resource according to demand of the energy arbitrage, and enable BESS continuously track the frequency deviation signals.
随着电池储能系统在电力系统中的快速发展,电池储能系统在能源套利和频率调节中的多功能应用被认为是提高经济效益的有效途径。然而,目前BESS的运行策略不能充分考虑能源套利的时变需求和频率调节的随机性。为此,本文提出了一种考虑频率调节随机性的动态操作策略(DOS),其结果由套利能力和下垂系数两个核心参数组成。结果表明,BESS DOS可以根据能源套利的需求调整BESS资源的调度优先级,使BESS能够持续跟踪频率偏差信号。
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引用次数: 0
Technology Development Review and Economic Analysis of Power-Hydrogen-Chemical Integrated Energy Systems 动力-氢-化工一体化能源系统技术发展综述及经济分析
Pub Date : 2023-03-23 DOI: 10.1109/AEEES56888.2023.10114288
Zizhuang Liu, Haozhe Sun, Yongli Xia, Yao Chen
With the signing of the Paris Agreement and the setting of governmental pledges globally for carbon neutrality, the development of hydrogen energy industry has become more and more rapid both in China and abroad, which also puts forward new requirements and opportunities for power systems and coal chemical industry. Technologies for Power-Hydrogen-Chemical integrated energy systems are evolving aiming to mitigate the challenges due to ever-increasing penetration of renewable generation in power systems, and to realize decarbonization of hard-to-abate coal chemical sector. In this paper, the recent development of Power-Hydrogen-Chemical integrated energy systems is summarized, the basic principles from the perspectives of water electrolysis - power system coupling and green hydrogen - coal chemical coupling are introduced, the key technologies from system integration, coordinated control, operation and maintenance points of view are discussed, an economic analysis based on a case study in Northwest of China is conducted, which demonstrates the feasibility of large-scale Power-Hydrogen-Chemical integrated energy systems in supporting energy transition and sustainable development in China.
随着《巴黎协定》的签署和全球各国政府碳中和承诺的设定,国内外氢能产业的发展越来越迅速,这也对电力系统和煤化工行业提出了新的要求和机遇。电力-氢-化工一体化能源系统技术正在不断发展,旨在缓解可再生能源发电在电力系统中日益普及所带来的挑战,并实现难以减排的煤化工行业的脱碳。综述了电-氢-化工一体化能源系统的发展现状,从水电-电力系统耦合和绿色氢-煤化工耦合的角度介绍了一体化能源系统的基本原理,从系统集成、协调控制、运维等方面探讨了一体化能源系统的关键技术,并以西北地区为例进行了经济分析。论证了大型电氢化一体化能源系统在支持中国能源转型和可持续发展方面的可行性。
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引用次数: 0
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2023 5th Asia Energy and Electrical Engineering Symposium (AEEES)
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