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2022 7th Asia Conference on Power and Electrical Engineering (ACPEE)最新文献

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Safety Helmet Detection Dynamic Model Based on the Critical Area Attention Mechanism 基于临界区域注意机制的安全帽检测动态模型
Pub Date : 2022-04-01 DOI: 10.1109/ACPEE53904.2022.9783764
Yao Nan, Qin Jian-Hua, Wang Zhen, Wang Hong-Chang
In the substation monitoring environment, monitoring the helmet wearing of workers is an important approach to ensure safety. Because the helmet size in entire surveillance images is often small and the characteristic information is unclear, existing target detection algorithms present the problem of missed detection and omission. A safety helmet detection dynamic model based on the critical area attention mechanism first detected the human target in the image, and then, locked the human head area through the critical area attention mechanism network. Finally, the feature map of the critical areas of the head was up-sampled many times to increase the proportion of the helmet area in the image to highlight the characteristic information of the helmet in the image. The algorithm used the dynamic model method to match the optimum up-sampling times for the helmets of different scales, which improved the recognition speed of the algorithm while ensuring the recognition accuracy. The experimental results showed that the recognition rate of algorithm for helmets was 92.68%, which is considerably higher than that of other target detection algorithms in the same field.
在变电站监控环境中,对工作人员的安全帽佩戴情况进行监控是保证安全的重要手段。由于整个监控图像中的头盔尺寸往往较小,特征信息不清晰,现有的目标检测算法存在漏检和遗漏的问题。基于关键区域注意机制的安全帽检测动态模型首先检测图像中的人体目标,然后通过关键区域注意机制网络锁定人体头部区域。最后,对头部关键区域的特征图进行多次上采样,增加图像中头盔区域的比例,突出图像中头盔的特征信息。该算法采用动态模型方法匹配不同尺度头盔的最佳上采样次数,在保证识别精度的同时提高了算法的识别速度。实验结果表明,该算法对头盔的识别率为92.68%,大大高于同领域的其他目标检测算法。
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引用次数: 2
Fast Probabilistic TTC Assessment Based on Copula Theory and Deep Ensemble Learning 基于Copula理论和深度集成学习的快速概率TTC评估
Pub Date : 2022-04-01 DOI: 10.1109/ACPEE53904.2022.9783751
Shaopeng Zhang, Jiongcheng Yan, Xin Li, Dong Yang, Huan Ma, Changgang Li
Wind power integration makes the uncertainty of power system increasing dramatically, which brings new challenges to the calculation of Total Transfer Capability (TTC). A fast assessment method for probabilistic TTC based on Copula and deep ensemble learning is proposed. Considering wind power output uncertainties and correlation of wind speed in geographical close wind farms, Copula function is adopted to generate scenarios. Stacked Denoising Autoencoder (SDAE) is used to extract features directly from source data. Support Vector Regression (SVR) is selected as regressor and bagging ensemble strategy is applied to further improve the accuracy of the TTC estimation. The case study in simplified Shandong grid validates the effectiveness of the proposed method.
风电并网使电力系统的不确定性急剧增加,给总输电能力(TTC)的计算带来新的挑战。提出了一种基于Copula和深度集成学习的概率TTC快速评估方法。考虑到地理距离较近的风电场风电输出的不确定性和风速的相关性,采用Copula函数生成情景。采用堆叠去噪自动编码器(SDAE)直接从源数据中提取特征。选择支持向量回归(SVR)作为回归量,采用bagging集成策略进一步提高TTC估计的精度。以简化后的山东电网为例,验证了该方法的有效性。
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引用次数: 0
Study On Small Disturbance Characteristics Of Ac Side Of Grid-connected VSC 并网VSC交流侧小扰动特性研究
Pub Date : 2022-04-01 DOI: 10.1109/ACPEE53904.2022.9783997
Runze Bai, Yuanxin Zhang, Zehong Yu, Yongqiang Zhu
This paper analyzes the small disturbance characteristics of voltage source converter (VSC) in the frequency domain, expounds the process in which the small harmonic disturbance of the grid voltage participates in the operation of the VSC, clarifies the generation mechanism of the disturbance frequency current and the disturbance coupling frequency current. The small disturbance impedance model of VSC considering the dynamic characteristics of phase-locked loop (PLL) is established by using the harmonic linearization method. The simulation model in PSCAD/EMTDC verifies the correctness of the small disturbance impedance model. Theoretical analysis and simulation show that the converter control parameters and PLL parameters will affect the impedance characteristics of small disturbance impedance.
分析了电压源变换器(VSC)在频域的小扰动特性,阐述了电网电压的小谐波扰动参与VSC运行的过程,阐明了扰动频率电流和扰动耦合频率电流的产生机理。采用谐波线性化方法,建立了考虑锁相环动态特性的VSC小扰动阻抗模型。在PSCAD/EMTDC中建立的仿真模型验证了小干扰阻抗模型的正确性。理论分析和仿真结果表明,变换器控制参数和锁相环参数会影响小扰动阻抗的阻抗特性。
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引用次数: 0
Orderly charging of electric vehicles considering new energy consumption and system peak-to-valley differences 考虑新能源消耗和系统峰谷差异的电动汽车有序充电
Pub Date : 2022-04-01 DOI: 10.1109/ACPEE53904.2022.9784024
Chen Yiyao, Xue Yingnan, Wu Yingying, Liang Yaojun, Wang Qianchun, Duan Xinhui
Electric vehicles as controllable loads connected to the grid can improve the utilization of wind and PV and thus reduce the amount of renewable energy curtailment, but if they are not regulated, they can cause harm to the operation of the grid. This article adopts an algorithm called cuckoo search which has global convergence is used to perform a two-stage optimization of the system load. In the first stage, the amount of wind and solar power curtailment is optimized, and it is obvious that the amount of new energy consumption increases from 5423kW to 5842kW, but the power consumption in peak hours increases significantly, forming a phenomenon of "peaking on peak". Compared with the first stage, the peak load curve is smoothed out during the second stage and the valley load curve is filled, and the difference between the highest and lowest value of the electricity load is reduced from 254 kW to 198 kW. The results show that this optimization method not only increases the amount of new energy consumption, but also stabilizes the load fluctuations in order to mitigate the impact of large-scale electric vehicle charging on the electric grid.
电动汽车作为可控负载接入电网,可以提高风能和光伏的利用率,从而减少可再生能源弃风量,但如果不加以监管,则会对电网的运行造成危害。本文采用具有全局收敛性的布谷鸟搜索算法对系统负载进行两阶段优化。第一阶段,风电、太阳能弃风量优化,新增能耗从5423kW明显增加到5842kW,但高峰时段用电量明显增加,形成“峰上加峰”的现象。与第一阶段相比,第二阶段平滑了峰值负荷曲线,填补了低谷负荷曲线,电力负荷最高与最低值之差由254 kW减小到198 kW。结果表明,该优化方法不仅增加了新能源的消耗量,而且稳定了负荷波动,以减轻大规模电动汽车充电对电网的影响。
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引用次数: 1
A Parallel Decentralized Solution for Multi-Regional Unit Commitment with Convex AC Power Flow Constraints 具有凸型交流潮流约束的多区域机组承诺并联分散解
Pub Date : 2022-04-01 DOI: 10.1109/ACPEE53904.2022.9783909
Zitong Wang, Gengfeng Li, Yao Xiao, Shunyu Tang, Mengjie Teng
Scheduling a multi-regional unit commitment is an efficient way to operate the power system economically. The conventional unit commitment models, which adopts the DC power flow, fail to take the network loss and voltage drop constraints into account. This paper proposes a novel AC power flow model to fill this gap. The proposed model first achieves convexity by decomposing the nonlinear part of the network loss into the voltage amplitude part and the phase angle part, and then is formulated into two sets of linear inequalities. After that, this paper integrates it into a multi-regional unit commitment. Considering the independence and parallelism of operation between regions, the established unit commitment is solved via a parallel decentralized solution, where the simplicial decomposition method (SDM), the nonlinear block Gauss-Seidel (GS) method, and the augmented Lagrangian method (ALM) (abbreviated as SDM-GS-ALM) are integrated. Finally, the efficiency and applicability of the multi-regional unit commitment with convex AC power flow constraints are verified on IEEE Test Systems.
多区域机组负荷调度是实现电力系统经济运行的有效途径。传统的采用直流潮流的机组承诺模型没有考虑网损和压降约束。本文提出了一种新的交流潮流模型来填补这一空白。该模型首先通过将网络损耗的非线性部分分解为电压幅值部分和相角部分来实现凸性,然后将其表述为两组线性不等式。之后,本文将其整合为一个多区域的单位承诺。考虑到区域间操作的独立性和并行性,采用简化分解法(SDM)、非线性块高斯-塞德尔法(GS)和增广拉格朗日法(ALM)相结合的并行分散解求解已建立的单元承诺。最后,在IEEE测试系统上验证了带凸型交流潮流约束的多区域机组承诺的有效性和适用性。
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引用次数: 0
Parameter analysis and experimental verification of dynamic vibration absorption design for transformer tank wall 变压器罐壁动态减振设计参数分析与实验验证
Pub Date : 2022-04-01 DOI: 10.1109/ACPEE53904.2022.9784027
Bin Wang, Hong Zhang, M. Cao, Zhijie Qian, Dongcheng Zhou
Distribution transformer goes deep into the load center, and its vibration and noise problems are becoming more and more prominent. Taking a distribution transformer as object of study, firstly, the vibration analysis model of transformer tank is established, the analysis of oil tank vibration mode is carried out, and obtain the vibration modes of transformer oil tank with different thickness. Secondly, combined with the characteristics of distribution transformer tank wall vibration and vibration source, the design parameters of transformer tank wall vibration absorption are analyzed; Finally, the vibration and noise test of transformer with or without vibration absorber under rated voltage is carried out on the test transformer. The research shows that the vibration mode frequency of transformer oil tank increases linearly with the thickness of tank wall. Blindly increasing the wall thickness will significantly increase the frequency of tank wall, resulting in the same frequency resonance between tank wall and vibration source. Setting single and multiple vibration absorbers on the tank wall can effectively reduce the vibration acceleration of transformer tank wall, but multiple vibration absorber systems are more sensitive to the design parameters. Therefore, Reasonably setting the design stiffness and design quality of the vibration absorber is the key to ensure the function of the tank wall vibration absorber. By adopting a reasonable design scheme, the average vibration reduction on the surface of the oil tank can exceed 20dB. The above research has a good reference for the vibration and noise control of transformer tank wall.
配电变压器深入负荷中心,其振动和噪声问题日益突出。以某配电变压器为研究对象,首先建立了变压器油箱的振动分析模型,对油箱的振动模式进行了分析,得到了不同厚度的变压器油箱的振动模式。其次,结合配电变压器罐壁振动特点和振动源,分析了配电变压器罐壁吸振的设计参数;最后,在试验变压器上进行了额定电压下带减振器和不带减振器变压器的振动和噪声试验。研究表明,变压器油箱的振型频率随油箱壁厚的增加而线性增加。盲目增加壁厚会显著提高罐壁频率,导致罐壁与振动源发生同频共振。在罐壁上设置单个和多个吸振器可以有效降低变压器罐壁上的振动加速度,但多个吸振器系统对设计参数更为敏感。因此,合理设置减振器的设计刚度和设计质量是保证罐壁减振器功能的关键。采用合理的设计方案,油箱表面平均减振可达20dB以上。上述研究对变压器罐壁的振动和噪声控制具有很好的参考意义。
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引用次数: 0
Fault diagnosis method of distribution transformer based on improved deep learning 基于改进深度学习的配电变压器故障诊断方法
Pub Date : 2022-04-01 DOI: 10.1109/ACPEE53904.2022.9783871
Yunfeng Liu, Mengnan Li, Yi-Min Peng, Hongshan Zhao
In view of the low efficiency of the current distribution transformer fault diagnosis methods, a transformer state identification method based on improved deep belief network(DBN) is proposed in this paper. Firstly, the operation state data of distribution transformer is classified, analyzed and standardized. On this basis, the bidirectional random butterfly optimization algorithm is used to dynamically optimize the parameters of the DBN, so as to provide the efficient calculation and processing state of the whole cycle of diagnosis and analysis, and realize the accurate and effective fault identification and diagnosis of transformer. The simulation results show that the accuracy of the proposed fault identification method is 98.76% and the analysis time is 7.456s, which has good network performance.
针对现有配电变压器故障诊断方法效率较低的问题,提出了一种基于改进深度信念网络(DBN)的配电变压器状态识别方法。首先,对配电变压器运行状态数据进行分类、分析和标准化。在此基础上,采用双向随机蝴蝶优化算法对DBN的参数进行动态优化,从而提供诊断分析全周期的高效计算和处理状态,实现变压器准确有效的故障识别和诊断。仿真结果表明,该方法的故障识别准确率为98.76%,分析时间为7.456秒,具有良好的网络性能。
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引用次数: 0
Research on Influencing Factors of Distribution Network Overhaul without Power Interruption Based on Analytic Hierarchy Process 基于层次分析法的配电网无中断检修影响因素研究
Pub Date : 2022-04-01 DOI: 10.1109/ACPEE53904.2022.9783832
Ai Maomin, An Junwei, Sun Congcong, Wang Qingze, Zhang Shouqiang, Zhang Jiaming
Distribution network overhaul without power interruption is an important means to improve power supply reliability. In this paper, in order to analyze the influencing factors of distribution network overhaul without power interruption, the research is carried out by using analytic hierarchy process (AHP). Firstly, the influencing factors of distribution network overhaul without power interruption is listed and the hierarchical evaluation index system is constructed according to the principles of comprehensiveness, independence and practicability; Then, the judgment matrix is constructed and AHP is used for calculation, and the weight coefficient of influencing factors is output to provide the basis for decision-makers to implement policies; Finally, combined with the status in a certain area, the results show that the method can judge the importance of influencing factors accurately and improve the ability of distribution network overhaul without power interruption.
配电网无中断检修是提高供电可靠性的重要手段。为了分析配电网无中断检修的影响因素,本文采用层次分析法(AHP)进行了研究。首先,根据全面性、独立性和实用性的原则,列出了配电网无中断检修的影响因素,构建了分级评价指标体系;然后,构建判断矩阵,运用层次分析法进行计算,输出影响因素的权重系数,为决策者实施政策提供依据;最后,结合某地区的现状,结果表明,该方法能够准确判断影响因素的重要性,提高配电网无中断检修的能力。
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引用次数: 0
Design of Magnetic Barrier Angle of Permanent Magnet Assisted Synchronous Reluctance Motor Based on Minimum Torque Ripple 基于最小转矩脉动的永磁辅助同步磁阻电机磁障角设计
Pub Date : 2022-04-01 DOI: 10.1109/ACPEE53904.2022.9783897
Wu Zhequan, Yin Dejun, Chen Lujun, Fu Jia
Taking permanent magnet assisted synchronous reluctance motor (PM-SynRM) as the research object, aiming at the problem of large torque ripple, Proposing a design method of motor magnetic barrier angle based on minimum torque ripple. Firstly, analyzing the source of torque ripple of permanent magnet assisted synchronous reluctance motor, and offsetting the positive and negative ripple to weaken the torque ripple. Secondly, deducing the angle between two adjacent magnetic barriers and included angle of magnetic barrier of the permanent magnet assisted synchronous reluctance motor with different slot pole matching and the number of magnetic barrier layers. Finally, designing and manufacturing the prototype according to the deduced magnetic barrier angle, and testing motor performance with bench. The test results are basically consistent with the simulation results. The results show that the magnetic barrier angle design method can minimize the torque ripple of the motor.
以永磁辅助同步磁阻电机(PM-SynRM)为研究对象,针对电机转矩脉动大的问题,提出了一种基于最小转矩脉动的电机磁障角设计方法。首先,分析了永磁辅助同步磁阻电机转矩脉动的来源,并对正、负脉动进行了补偿以减弱转矩脉动。其次,推导出不同槽极匹配和磁垒层数的永磁辅助同步磁阻电机相邻两个磁垒夹角和磁垒夹角;最后,根据推导出的磁障角设计制造了样机,并在台架上对电机性能进行了测试。试验结果与仿真结果基本一致。结果表明,磁障角设计方法能最大限度地减小电机转矩脉动。
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引用次数: 1
Independent and controllable security container substation equipment condition monitoring method based on cloud edge cooperation 基于云边缘协作的自主可控安全集装箱变电站设备状态监测方法
Pub Date : 2022-04-01 DOI: 10.1109/ACPEE53904.2022.9783815
Yingwei Zhu, Dong Liu, Yinqiang Huang, Lixiang Ruan
In order to solve the problems of low real-time and insufficient accuracy of the current substation equipment state analysis methods, this paper proposes an independent and controllable security container substation equipment state monitoring method based on cloud edge cooperation mode. This method combines edge computing technology with cloud computing technology to build a cloud edge collaborative architecture for power equipment state analysis; On the edge side, the ordered processing of data is realized based on correlation analysis method to provide reliable and complete data support; On the cloud side of the master station, dynamic power equipment state analysis is realized based on C4.5 decision tree algorithm. The simulation experiment takes SF6 circuit breaker as an example. The experimental results show that the state recognition accuracy of the proposed method is more than 95% and has good state analysis performance.
为了解决当前变电站设备状态分析方法实时性低、准确性不足的问题,本文提出了一种基于云边缘协作模式的独立可控安全集装箱变电站设备状态监测方法。该方法将边缘计算技术与云计算技术相结合,构建了电力设备状态分析的云边缘协同架构;在边缘端,基于相关分析方法实现数据的有序处理,提供可靠、完整的数据支持;在主站云端,基于C4.5决策树算法实现电力设备动态状态分析。仿真实验以SF6断路器为例。实验结果表明,该方法的状态识别准确率在95%以上,具有良好的状态分析性能。
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引用次数: 0
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2022 7th Asia Conference on Power and Electrical Engineering (ACPEE)
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