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2023 6th International Conference on Energy, Electrical and Power Engineering (CEEPE)最新文献

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Research on Multi-load Forecasting of Integrated Energy System Based on GRA-BP Neural Network 基于GRA-BP神经网络的综合能源系统多负荷预测研究
Pub Date : 2023-05-12 DOI: 10.1109/CEEPE58418.2023.10167371
Xiaohui Zhang, Dongdong Lv, Zhifei Hao
Aiming at the accuracy of regional comprehensive energy multi-load forecasting, a multi-load short-term forecasting model based on grey correlation analysis and improved BP neural network is proposed. The BP neural network prediction model has adaptive learning rate, elastically modifies the connection weight coefficient and improves the prediction accuracy. According to the typical climate characteristics in summer and winter, the correlation change law of cold, heat, electricity and gas load in an industrial park is dynamically simulated according to the actual calculation example. The actual results show that the improved BP neural network multivariate load short-term prediction model improves the prediction accuracy and has practical application prospects.
针对区域综合能源多负荷预测的准确性,提出了一种基于灰色关联分析和改进BP神经网络的多负荷短期预测模型。BP神经网络预测模型具有自适应学习率、弹性修正连接权系数,提高了预测精度。根据某工业园区夏季和冬季典型气候特征,结合实际算例,动态模拟了工业园区冷、热、电、气负荷的相关变化规律。实际结果表明,改进的BP神经网络多元负荷短期预测模型提高了预测精度,具有实际应用前景。
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引用次数: 0
Prediction for Power Supply Area Interrupted by Heavy Rainfall in Guangxi Power Grid 广西电网强降雨中断供电区域预测
Pub Date : 2023-05-12 DOI: 10.1109/CEEPE58418.2023.10166841
W. Zhang, Shan-Guo Li, Bo Feng, Longjun Wang, Xiaoli Luo
In view of the problem of flood disaster caused by heavy rainfall, which affected power supply reliability, a dynamic prediction approach for power supply area interrupted by heavy rainfall is proposed. First, under the spatial correlation rules, the power supply area within the surface rainfall boundary is judged by multidimensional data, such as digital geography. Secondly, with the distribution transformer of the power supply area as the geometric center, the area and the scale of power outage users are solved. Thirdly, the supervised learning algorithm is used to predict the disaster area out of service, on the basis of the binary classification of prior data. Finally, the dynamic changes of the predicted results are calculated according to the intensity changes of the rainfall process. Using the confusion matrix and the receiver operation characteristic curve to verify the prediction method. The numerical results show that this approach can dynamically predict the power supply area interrupted by heavy rainfall, which can be used for the production command in the process of “water rise and power failure, water back and power recovery”.
针对暴雨引发洪涝灾害影响供电可靠性的问题,提出了一种暴雨中断供电区域的动态预测方法。首先,在空间相关规则下,利用数字地理等多维数据判断地表降雨边界内的供电区域;其次,以供电区配电变压器为几何中心,求解停电用户的面积和规模;第三,在对先验数据进行二值分类的基础上,采用监督学习算法对灾区停机进行预测。最后,根据降雨过程的强度变化计算预报结果的动态变化。利用混淆矩阵和接收机运行特性曲线对预测方法进行验证。数值计算结果表明,该方法能够动态预测强降雨条件下的供电中断区域,为“涨水断电、回水回电”过程中的生产指挥提供依据。
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引用次数: 0
An Enhanced Primary Frequency Regulation Strategy for Thermal Power Plants-Energy Storage Systems Integrated System 火力发电厂-储能系统集成系统的一次频率改进策略
Pub Date : 2023-05-12 DOI: 10.1109/CEEPE58418.2023.10166140
Song Gao, Jun Li, Hui Song
The requirement for primary frequency regulation (PFR) capability of thermal power plants (TPPs) in power systems with larger penetration of renewable energy resources (RESs) is higher since the RESs contribute less to PFR compared with TPPs. To ensure the system frequency stability, this paper proposes to enhance the PFR capability of TPPs through integrating energy storage systems (ESSs) into them. By applying the PFR control strategy to the ESS, the fast response capability of the ESS is utilized, and the overall response speed of the power plant integrated with an ESS can be significantly improved. Furthermore, the state of charge (SOC) of the ESS is kept within the permissible range during the operation by adopting an energy recovery strategy to restore the released energy for PFR periodically. The effectiveness of the proposed control strategy is verified by simulation results.
在可再生能源比重较大的电力系统中,由于可再生能源比重相对较小,对火电厂一次调频能力的要求较高。为了保证系统的频率稳定性,本文提出通过将储能系统(ess)集成到电厂中来增强电厂的PFR能力。通过将PFR控制策略应用于ESS,利用ESS的快速响应能力,显著提高了集成ESS的电厂的整体响应速度。此外,通过采用能量回收策略,周期性地为PFR恢复释放的能量,使ESS的荷电状态(SOC)保持在允许的范围内。仿真结果验证了所提控制策略的有效性。
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引用次数: 0
Discharge Conditions Analysis of Lightning Current Action on Ground Wire-Suspension Clamp System 雷击电流作用于接地线-悬架箝位系统的放电条件分析
Pub Date : 2023-05-12 DOI: 10.1109/CEEPE58418.2023.10166305
Hongfa Li, Qingjiang Chen, Shaobing Cheng, Zhicong Dong, Rongpeng Wang, Ruige Cai, Beisi Huang, Gang Liu
The discharge inside the suspension clamp is a significant factor for the damage of overhead ground wire. To find the reason of discharge, an electric circuit model was established to analyze the current distribution of contact points inside the Ground Wire-Suspension Clamp System (GW-SC System). Subsequently, the current waveform flowing through each contact point in different torque was obtained through finite element simulation. Based on the result, a single contact point model was created to analyze the electric field intensity distribution around the contact point with the highest current flow. The final result shows that, under the action of lightning current, the air gap near the contact point has a very high electric field intensity, which may even exceed 30kV/cm. The shape and size of contact point have a great impact on the electric field intensity and distribution.
悬挂钳内放电是架空地线损坏的一个重要因素。为了找出放电的原因,建立了电路模型,分析了接地线-悬架夹紧系统(GW-SC系统)内部接触点的电流分布。随后,通过有限元仿真得到了在不同转矩下流过各接触点的电流波形。在此基础上,建立了单接触点模型,分析了电流最大接触点周围的电场强度分布。最终结果表明,在雷电电流的作用下,接触点附近的气隙具有非常高的电场强度,甚至可能超过30kV/cm。接触点的形状和大小对电场强度和分布有很大的影响。
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引用次数: 0
Active Infrared Thermography for Interfacial Defects Detection on Composite Cross-Arms Based on Finite Element Simulation 基于有限元模拟的复合材料横臂界面缺陷主动红外热像检测
Pub Date : 2023-05-12 DOI: 10.1109/CEEPE58418.2023.10165732
Zhen Huang, Z. Wang, Yanxin Tu, F. Yin, Liming Wang, Xiangyang Peng
Composite transmission towers have become a key trend in the development of transmission and substation systems in recent years, and composite cross-arms have begun to replace traditional steel cross-arms in some lines. The interface of composite cross-arms, on the other hand, might be faulty owing to its variables and external environmental influence. Existing detection technologies have several limitations, and active infrared thermography, as a new technology, has demonstrated its efficacy in identifying faults in composite materials. In this work, the thermal response characteristics of composite cross-stretcher interface flaws are comprehensively investigated using the finite element simulation method. The thermal response characteristics of interface defects of various sizes, depths, and kinds are compared, and the temperature variation characteristics of the defects are described using linear and logarithmic coordinates. The nature of the defect can be extracted from the rate of temperature change and the temperature in the smooth phase in linear coordinates, and the nature of the defect can be extracted from the curve shift time, magnitude, and direction in logarithmic coordinates. The research presented in this work demonstrates that active infrared thermography can effectively distinguish interface defects in composite cross-arms.
近年来,复合输电塔已成为输电变电系统发展的一个关键趋势,在一些线路上,复合输电塔已开始取代传统的钢结构输电塔。另一方面,复合材料交叉臂的界面由于其变量和外界环境的影响,可能会出现故障。现有的检测技术存在一定的局限性,而主动红外热成像技术作为一种新技术,在复合材料故障识别方面已经证明了它的有效性。本文采用有限元模拟方法对复合材料交叉拉伸界面缺陷的热响应特性进行了全面研究。比较了不同尺寸、深度和种类界面缺陷的热响应特性,用线性坐标和对数坐标描述了界面缺陷的温度变化特征。在线性坐标系中可以从温度变化率和光滑相位的温度中提取缺陷的性质,在对数坐标系中可以从曲线移位时间、幅度和方向中提取缺陷的性质。研究表明,主动红外热成像技术可以有效地识别复合材料横臂的界面缺陷。
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引用次数: 0
Photovoltaic Energy as an Alternative in Times of Low Water Demand in Hydroelectric Power Plants 光伏能源作为水电低耗时的替代能源
Pub Date : 2023-05-12 DOI: 10.1109/CEEPE58418.2023.10166259
Oliver Quispe de la Cruz, Marco Cesar Paytán Valero, Sario Angel Chamorro Quijano, Cesar Quispe Lopez, Diego Ricardo Cajachagua Guerreros
This research presents a double pumping system to harness water even during periods of low water demand in the Peruvian highlands. In this way, a regular hydroelectric power plant was transformed into a double pumped hydroelectric power plant. The proposed system consists of 4 stages for the coupling of the double pumping system in regions of the Peruvian highlands. In the first stage, the drought period was evaluated based on historical hydrometeorological data from the Malpaso station. In the second stage, the activation of the system was validated, verifying whether the daily energy produced by the hydroelectric plant is lower than usual and confirming that the region has periods of low water demand. In the third stage, the energy generated by the solar panels was redirected during the night. In the fourth stage, the hydraulic pumps located in the lower reservoir were activated to bring water to the upper reservoir thanks to the photovoltaic energy generated, increasing the water resource in the upper reservoir. The proposed system design will provide an alternative to maintain stable flows of electricity production, even if the generation area has a deficit of water resources due to low rainfall.
这项研究提出了一种双泵系统,即使在秘鲁高地的低用水需求时期也能利用水。这样,一个普通的水力发电厂就变成了双泵水力发电厂。拟议的系统由4个阶段组成,用于秘鲁高原地区的双泵系统耦合。第一阶段,利用马尔帕索站的历史水文气象资料对干旱期进行评价。在第二阶段,对系统的激活进行验证,验证水力发电厂的日发电量是否低于正常水平,并确认该地区存在低用水需求期。在第三阶段,太阳能电池板产生的能量在夜间被重新定向。第四阶段,激活位于下水库的液压泵,利用光伏发电的能量将水引至上水库,增加上水库的水资源。拟议的系统设计将提供一种替代方案,以保持稳定的电力生产流量,即使发电区由于降雨量少而缺水。
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引用次数: 0
Low Current Low Power Factor Test Device for Testing an Electricity Meter 用于电表测试的小电流低功率因数测试装置
Pub Date : 2023-05-12 DOI: 10.1109/CEEPE58418.2023.10166590
Zhengming Zhang, Yiqin Jiang, Jingfen Bai, Xitong Xu
This paper introduces the design of a standard power source and standard meter for low current low power factor conditions. It includes high resolution and high stability design of signal source, high isolation and low leakage design of current power amplifier circuit, voltage and current synchronization design, synchronous sampling design based on ADS1278, etc.
本文介绍了一种适用于低电流、低功率因数工况的标准电源和标准仪表的设计。包括信号源的高分辨率、高稳定性设计、电流功率放大电路的高隔离、低漏设计、电压电流同步设计、基于ADS1278的同步采样设计等。
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引用次数: 0
Faulty Feeder Identification in Low Current Grounding Active Distribution Networks Based on Dilated Convolution and Attention Mechanism 基于扩展卷积和注意机制的小电流接地有功配电网故障馈线识别
Pub Date : 2023-05-12 DOI: 10.1109/CEEPE58418.2023.10167313
Xuefeng Yang, Simin Luo, Guomin Luo, Jiaxin Ru, Boyang Shang
Due to the unclear feature information of single-phase grounding faults in the active distribution network and the influence of fault conditions and environmental noise on existing route selection methods, this paper proposes a route selection method for active distribution network faults based on dilated convolution and the attention mechanism. Firstly, form two-dimensional time-frequency graphs mapped from the zero-sequence current by using wavelet transform. Then, construct a dilated convolutional network model based on the attention mechanism, combine it with the softmax classifier, and train the network model. Finally, the effectiveness of the proposed method is verified by comparison of simulation and experiment. The results show that, when the accuracy reaches 95%, the network constructed in this paper takes 179s less than ordinary convolution, and the accuracy increases by 3.3% under the same training time.
针对有源配电网单相接地故障特征信息不清晰以及故障条件和环境噪声对现有选线方法的影响,本文提出了一种基于展开卷积和注意机制的有源配电网故障选线方法。首先,利用小波变换从零序电流映射成二维时频图;然后,构建基于注意机制的扩展卷积网络模型,并将其与softmax分类器相结合,对网络模型进行训练。最后,通过仿真与实验对比验证了所提方法的有效性。结果表明,当准确率达到95%时,本文构建的网络比普通卷积缩短了179秒,在相同的训练时间下,准确率提高了3.3%。
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引用次数: 0
Cooperative Scheduling of Electric Springs and On-Load Tap Changers for Volt/Var Control in Active Distribution Networks 有功配电网电压/无功控制中电动弹簧和有载分接开关的协同调度
Pub Date : 2023-05-12 DOI: 10.1109/CEEPE58418.2023.10166393
Jianhua Gong, Li Liu, Keng-Weng Lao
Coordinated voltage and reactive power control of the active distribution networks (ADNs) are usually based on discrete regulating devices like the on-load tap changer (OLTC). However, frequent operations of the OLTC are detrimental to its long-term service life. Also, discrete adjustments of OLTC taps cannot meet the requirement of precise volt/var control (VVC). To address this, the emerging electric spring is proposed for joint VVC with the OLTC in ADNs in this paper. First, we develop a time-series optimization model for VVC in ADN. In this model, multiple electric springs and the OLTC are regarded as controllable devices. The objective function comprises minimum power losses and minimum voltage violations. Then, the electric springs contribute to decreasing total tap movements of OLTC, which is represented as a constraint in the proposed model. Case studies are carried out on a modified IEEE-33 test feeder. Simulation results validate the effectiveness and accuracy of the proposed model.
有功配电网的电压和无功协调控制通常基于有载分接开关(OLTC)等离散调节装置。但是,频繁的操作不利于OLTC的长期使用寿命。此外,OLTC抽头的离散调节不能满足精确的电压/无功控制(VVC)的要求。为了解决这个问题,本文提出了一种新兴的电子弹簧,用于ADNs中与OLTC的联合VVC。首先,我们建立了ADN中VVC的时间序列优化模型。在该模型中,将多个电弹簧和OLTC视为可控装置。目标函数包括最小的功率损耗和最小的电压违和。然后,电动弹簧有助于减少OLTC的总丝锥运动,这在所提出的模型中表示为约束。案例研究是在一个改进的IEEE-33测试馈线上进行的。仿真结果验证了该模型的有效性和准确性。
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引用次数: 0
ADRC-Based Controller with Linkage Compensation for Interleaved Parallel Converters 基于adrc的交错并联变流器联动补偿控制器
Pub Date : 2023-05-12 DOI: 10.1109/CEEPE58418.2023.10166326
Bo Wang, Xuesong Zhou, Chenyang Zhao, Long Tao, Youjie Ma, Zhiqiang Gao
The microgrid is the key development direction of distributed energy. However, the performance indicators of its low-voltage side interface are often affected under complex operating conditions. To address this problem in a targeted manner, a linkage compensatory active disturbance rejection controller (LC-ADRC) that considers both the higher-order perturbation model and object model information is proposed. In this work, the extended state observer (ESO) and the feedback control law of the LC-ADRC are reconstructed according to the interleaved parallel bi-directional converter (IBC) characteristics, and the theoretical analysis shows that the dynamic response and immunity to disturbances of the IBC under typical conditions can be improved simultaneously. Finally, the experimental curves and test indexes obtained from the 300-watt test platform designed for these operating conditions verified the accuracy of the theoretical analysis.
微电网是分布式能源发展的关键方向。然而,在复杂的工作条件下,其低压侧接口的性能指标经常受到影响。为了有针对性地解决这一问题,提出了一种同时考虑高阶扰动模型和目标模型信息的连杆补偿自抗扰控制器(LC-ADRC)。本文根据交错并联双向变换器(IBC)的特性,重构了LC-ADRC的扩展状态观测器(ESO)和反馈控制律,理论分析表明,在典型条件下,IBC的动态响应和抗干扰能力可以同时得到提高。最后,在针对这些工况设计的300瓦试验平台上获得的实验曲线和试验指标验证了理论分析的准确性。
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引用次数: 0
期刊
2023 6th International Conference on Energy, Electrical and Power Engineering (CEEPE)
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