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2022 4th International Conference on Smart Power & Internet Energy Systems (SPIES)最新文献

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Renewable Energy Consumption and Economic Analysis of Renewable Energy and Thermal Power Combined Transmission System Considering Electric Energy Storage Configuration 考虑储能配置的可再生能源与火电联运系统的可再生能源消耗及经济性分析
Pub Date : 2022-12-09 DOI: 10.1109/SPIES55999.2022.10082282
Zesen Wang, Qi Li, Kai Bai, Jinzhi Guo, Zhe Wang, Yinglin Liu
China's renewable energy development bases are mainly concentrated in the "Three North" areas. The phenomenon of renewable energy power abandonment is serious. As a flexible resource, energy storage can effectively shift electricity and improve the utilization of renewable energy. Firstly, the output model of electric energy storage equipment is established. Secondly, a time series production simulation optimization model considering the output characteristics of electric energy storage equipment is constructed. Finally, taking an actual large-scale renewable energy and thermal power transmission system in the north through UHV AC / DC lines as an example, the system operation, renewable energy consumption, economy and other issues after energy storage access are quantitatively analyzed. The results show that the reasonable allocation of energy storage is conducive to improving the consumption capacity of renewable energy, reducing the utilization hours of thermal power, and improving the economy of system operation. It is of great significance to the development of renewable energy power system and energy storage equipment.
中国可再生能源发展基地主要集中在“三北”地区。可再生能源弃电现象严重。储能作为一种灵活的资源,可以有效地转移电能,提高可再生能源的利用率。首先,建立了电力储能设备的输出模型。其次,建立了考虑电力储能设备输出特性的时间序列生产仿真优化模型;最后,以北方某实际大型特高压交/直流输电系统为例,定量分析储能接入后的系统运行、可再生能源消耗、经济性等问题。结果表明,合理配置储能有利于提高可再生能源消纳能力,减少火电利用小时数,提高系统运行经济性。这对可再生能源电力系统和储能设备的发展具有重要意义。
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引用次数: 2
A Transformer Based Method with Wide Attention Range for Enhanced Short-term Load Forecasting 基于变压器的大关注范围短期负荷预测方法
Pub Date : 2022-12-09 DOI: 10.1109/SPIES55999.2022.10082249
Bozhen Jiang, Yi Liu, H. Geng, Huarong Zeng, Jiangqiao Ding
Short-term Load Forecasting (STLF) is important for the operational security and economics of power system. However, the existing Short-term Load Forecasting Models (SLFMs) generally consider the temporal dependency as static. Meanwhile, the load characteristics of periodic soft alignment and planed are ignored. Those neglect limits the STLF accuracy. In this paper, a Transformer based Short-term Load Forecasting Model (TSLFM) considering dynamic temporal dependency, periodic soft alignment and future information was proposed. Based on the encoder-decoder structure, TSLFM can be easily modified to satisfy different forecast ranges. Besides, the attention mechanism is employed in Transformer, TSLFM can capture the dynamic temporal dependency and realize periodic soft alignment. Additionally, TSLFM expands the attention range to combine historical and future information to infer the planed load. The results from two empirical studies in Switzerland and China suggest that: 1) TSLFM has good forecast performance (the maximum improvement of MAPE is 15.78% and 14.07%, and the minimum improvement is 8.49%, 8.99%, respectively) and can satisfy the high requirements for STLF, and 2) the attention maps further verify that TSLFM can consider dynamic temporal dependency, periodic soft alignment and future information.
短期负荷预测(STLF)对电力系统的运行安全性和经济性具有重要意义。然而,现有的短期负荷预测模型(SLFMs)通常将时间依赖性视为静态的。同时忽略了周期性软对齐和平面加载特性。这些忽略限制了STLF的准确性。提出了一种考虑动态时间依赖性、周期性软校准和未来信息的变压器短期负荷预测模型(TSLFM)。基于编码器-解码器结构,TSLFM可以很容易地修改以满足不同的预测范围。此外,在Transformer中采用了注意机制,TSLFM可以捕获动态时间依赖性,实现周期性软对齐。此外,TSLFM扩展了注意范围,结合历史和未来信息来推断计划负载。瑞士和中国的两项实证研究结果表明:1)TSLFM具有良好的预测性能(MAPE的最大改进率为15.78%和14.07%,最小改进率分别为8.49%和8.99%),可以满足对STLF的高要求;2)注意图进一步验证了TSLFM可以考虑动态时间依赖性、周期性软校准和未来信息。
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引用次数: 0
Analysis of Robustness Enhanced LCL Filter Design Based on Stability Region 基于稳定域的鲁棒增强LCL滤波器设计分析
Pub Date : 2022-12-09 DOI: 10.1109/SPIES55999.2022.10082572
Yuanzhe Ren, Hua Lin, Shaojie Li, Xingwei Wang
In LCL-type grid-connected inverter system, the resonance frequency will shift down and cross 1/6 of the sampling frequency due to the variation of grid impedance in weak grid, which will lead to instability. To enhance the robustness, an improved stability region based LCL filter design which adds a restriction on the lowest resonance frequency can be introduced. In this paper the influence of this restriction on the filter parameters have been studied and the results shows that the influence is greater under higher switching frequency. However, it is proved that the restriction will only lead to a limited total inductance increment. Therefore, the robustness enhanced filter design is proved to be of great practical value. At last, the analytical results are verified through experiments and simulations.
在lcl型并网逆变器系统中,弱电网中由于电网阻抗的变化,谐振频率会下移并跨越采样频率的1/6,从而导致系统不稳定。为了增强鲁棒性,可以引入一种改进的基于稳定域的LCL滤波器设计,该设计增加了最低谐振频率的限制。本文研究了这一限制对滤波器参数的影响,结果表明,开关频率越高,对滤波器参数的影响越大。然而,证明了这种限制只会导致有限的总电感增量。因此,鲁棒性增强滤波器设计具有重要的实用价值。最后,通过实验和仿真验证了分析结果。
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引用次数: 0
Learning to Topology Derivation of Power Electronics Converters with Graph Neural Network 用图神经网络学习电力电子变换器的拓扑推导
Pub Date : 2022-12-09 DOI: 10.1109/SPIES55999.2022.10082185
Ruijin Liang, M. Dong, Li Wang, Chenyao Xu, Wenrui Yan
This paper proposes a general learning framework to derive topology of power electronics converters. To increase flexibility, a circuit is represented by a graph. A Graph Neural Network extract features of the circuit graph, which is further used in the RL framework. The topology derivation process is regarded as a Markov Decision Process. In each step, the RL agent selects and connects a new block to the initial block until a complete topology is made. To ensure that the derived circuits are feasible, basic circuit constraints are taken into consideration in the reward function. By using this framework, many new six-port, eight-port and ten-port converters are derived. Simulation results show that the derived circuits satisfy given constraints well.
本文提出了一个通用的学习框架来推导电力电子变换器的拓扑结构。为了增加灵活性,电路用图形表示。图神经网络提取了电路图的特征,并将其进一步应用于RL框架。将拓扑推导过程看作一个马尔可夫决策过程。在每个步骤中,RL代理选择一个新块并将其连接到初始块,直到生成完整的拓扑。为了保证推导电路的可行性,在奖励函数中考虑了基本电路约束。利用这个框架,衍生出许多新的六端口、八端口和十端口转换器。仿真结果表明,所推导的电路满足给定的约束条件。
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引用次数: 0
FPGA-based Real-Time Simulation of Five-Phase PMSM for the HIL Applications 基于fpga的五相永磁同步电机HIL实时仿真
Pub Date : 2022-12-09 DOI: 10.1109/SPIES55999.2022.10082593
Nan Wang, Hao Bai, Ruiqing Ma, Gang Huang
Real-time simulation technology plays an important role in the development cycle of a permanent magnet synchronous motor (PMSM) control system. In this paper, an FPGA-based real-time simulation method is proposed for a five-phase permanent magnet synchronous motor (FPMSM). The mathematical model and its FPGA implementation are presented in detail. Moreover, to verify the accuracy of the model, the FPGA-based simulation results are compared with that of the FPMSM model in the Simulink Simscape Power System (SPS) library, and very good consistency is obtained. Finally, the dual-loop controller is implemented on FPGA and the real-time experiments of FPMSM control under various conditions are conducted to validate the effectiveness of the proposed FPGA real-time simulation method.
实时仿真技术在永磁同步电机控制系统的开发周期中起着重要的作用。本文提出了一种基于fpga的五相永磁同步电动机实时仿真方法。详细介绍了该系统的数学模型及其FPGA实现。此外,为了验证模型的准确性,将基于fpga的仿真结果与Simulink Simscape Power System (SPS)库中的FPMSM模型进行了比较,得到了很好的一致性。最后,在FPGA上实现了双环控制器,并在各种条件下对FPMSM进行了实时控制实验,验证了所提出的FPGA实时仿真方法的有效性。
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引用次数: 0
A Model-Data-Combined Identification Approach for Distribution Grid Line Parameter 一种模型-数据结合的配电网线路参数识别方法
Pub Date : 2022-12-09 DOI: 10.1109/SPIES55999.2022.10081992
Jiateng Li, Ji Qiao, Zixuan Zhao, Xiaohui Wang, Mengjie Shi
Compared with the transmission grid, the distribution grid has the characteristics of huge node scale, sparse measuring equipment and three-phase load imbalance. The parameter identification methods for the transmission grid might not suitable to the distribution network. In this paper, a two-stage model-data-combined identification approach for distribution grid line parameter is proposed. First, the linear initial identification model of line parameters is constructed based on the phase angle assumption, which is solved by the least square method. On the second stage, the refined identification model is developed based on the trust region reflection method which uses the initial values provided by the first stage. Meanwhile, the voltage phase angle is recovered. Finally, IEEE 33-bus and 74-bus distribution grid is utilized to verify the proposed method.
与输电网相比,配电网具有节点规模大、计量设备稀疏、三相负荷不平衡等特点。输电网的参数辨识方法可能不适用于配电网。本文提出了一种两阶段模型数据相结合的配电网线路参数识别方法。首先,基于相角假设,建立直线参数的线性初始辨识模型,采用最小二乘法进行求解;在第二阶段,基于信任域反射方法,利用第一阶段提供的初始值,建立精细化的识别模型;同时,恢复了电压相角。最后,以IEEE 33总线和74总线配电网为例验证了该方法的有效性。
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引用次数: 1
Smart Grid Data Mobile Interconnection Construction Plan 智能电网数据移动互联建设方案
Pub Date : 2022-12-09 DOI: 10.1109/SPIES55999.2022.10082402
Jun Guo, Man Hu, Zhongyang Xu, Wanshu Guo, Min Li, Yibo Wang
With the advent of the era of big data, the equipment information data of power grid enterprises has become the core asset of the enterprise. At present, the equipment information data of power grid enterprises has not yet established a standard management process and a unified data model. It is even more impossible to obtain, process and use equipment information data in a timely manner, which affects the real-time decision analysis and cross-department collaboration of power grid staff, and becomes a bottleneck for development. Therefore, the establishment of a stable, efficient and intelligent smart grid data interconnection platform has become the top priority of equipment, data and information management of power grid enterprise. Also, it is a scientific path to realize the collaborative innovation of enterprise technology and management.
随着大数据时代的到来,电网企业的设备信息数据已经成为企业的核心资产。目前,电网企业设备信息数据尚未建立规范的管理流程和统一的数据模型。更是无法及时获取、处理和利用设备信息数据,影响电网工作人员的实时决策分析和跨部门协作,成为发展的瓶颈。因此,建立一个稳定、高效、智能的智能电网数据互联平台已成为电网企业设备、数据和信息管理的重中之重。实现企业技术与管理协同创新是一条科学的道路。
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引用次数: 0
Robust Optimization Model of AC/DC Hybrid Distribution Network Considering Renewable Energy Uncertainty 考虑可再生能源不确定性的交直流混合配电网鲁棒优化模型
Pub Date : 2022-12-09 DOI: 10.1109/SPIES55999.2022.10081976
Yue Ma, Xiaoming Dong, Xue Yang, Z. Liu, XueYong Jia, Hongwen Sun
The rapid growth of renewable energy integration and power load exacerbates the uncertainty of power flow, thereby threatening the security of distribution network, and causing difficult regulation. The increase in DC application makes rapid development of AC/DC power distribution network, which operates with preferable flexibility. Accordingly, this study proposes a robust optimization model based on the relaxation evolution algorithm. Firstly, the formulations of AC/DC distribution network model, which is in terms of second-order cone programming, are derived. Accordingly, a robust reactive power optimization model is established with the objective function for minimizing the power loss and voltage offset of AC/DC distribution network. Furthermore, a co-evolution algorithm based on the relaxation method is proposed to solve this model. Case studies based on the improved IEEE33 bus system were conducted in simulation. The robust optimization model is demonstrated to effectively locating and treating the worst case of renewable energy operation.
可再生能源并网和电力负荷的快速增长加剧了潮流的不确定性,从而威胁到配电网的安全,并造成调控困难。随着直流应用的增加,交直流配电网发展迅速,具有良好的运行灵活性。因此,本研究提出了一种基于松弛进化算法的鲁棒优化模型。首先,推导了交/直流配电网的二阶锥规划模型。在此基础上,以交直流配电网的功率损耗和电压偏置最小为目标函数,建立了鲁棒无功优化模型。在此基础上,提出了一种基于松弛法的协同进化算法来求解该模型。基于改进的IEEE33总线系统进行了实例仿真。结果表明,该鲁棒优化模型能够有效地定位和处理可再生能源运行的最坏情况。
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引用次数: 0
Statistics for Lightning Parameters of Transmission Lines Based on Tower Block Method 基于塔块法的输电线路雷电参数统计
Pub Date : 2022-12-09 DOI: 10.1109/SPIES55999.2022.10082541
Guohua Yue, Jingxuan He, Y. Gan, De-mao Gu, Z. Du
When the traditional tower circle method is used to calculate the lightning parameters of transmission lines, because the radius of the tower circle is far greater than the span, there will be many overlapping areas. The lightning parameters in the overlap areas will be calculated many times, it will not only increase the calculation amount, but also lead to inaccurate results. In this paper, a new statistical method for lightning parameters of transmission lines is proposed. The line corridors are divided into block rectangles of equal size, which are close to each other as much as possible to reduce the impact of overlap. Taking the 500kV Xianmeng I transmission line as an example, the lightning density of each tower is calculated by block method and the lightning risk assessment is carried out. Compared with the traditional method, the results of the block method can better reflect the lightning parameter characteristics of the local tower.
采用传统的塔圈法计算输电线路雷电参数时,由于塔圈半径远大于跨距,会出现很多重叠区域。重叠区域的闪电参数将被多次计算,这不仅会增加计算量,而且会导致计算结果不准确。本文提出了一种新的输电线路雷电参数统计方法。将线廊划分为大小相等的块状矩形,尽量相互靠近,减少重叠的影响。以500kV仙盟1号输电线路为例,采用分块法计算各塔雷电密度,并进行雷电风险评估。与传统方法相比,块法的结果能更好地反映当地塔的雷电参数特征。
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引用次数: 0
Coordinated Transmission and Distribution Optimal Power Flow with Carbon Constraints 碳约束下的协调输配电最优潮流
Pub Date : 2022-12-09 DOI: 10.1109/SPIES55999.2022.10082694
Hao Jiao, Jinming Chen, Xindong Zhao, Yajuan Guo, Yezhou Yang
With the access of distributed new energy sources and loads, the coupling relationship between the transmission and the distribution network is greatly enhanced. In order to adapt to the increasing coupling relationship between transmission and distribution, this paper proposes a generalized global optimization model for transmission and distribution. Considering the carbon reduction requirements of the power industry in the context of carbon peak and carbon neutral, the coordinated transmission and distribution optimal power flow (TDOPF) model with carbon emission constraints is proposed. Based on the different characteristics of the transmission and distribution network, the heterogeneous decomposition algorithm is used to solve the optimization model. The transmission and distribution network is alternately optimized. The auxiliary function is constructed by parameters such as boundary node voltage and injection power to ensure that the optimal conditions of the global network are satisfied. The numerical example test shows the proposed algorithm has great accuracy and convergence.
随着分布式新能源和负荷的接入,输配网之间的耦合关系大大增强。为了适应输配耦合关系日益增强的情况,提出了输配全局优化的广义模型。考虑到碳峰值和碳中和背景下电力行业的碳减排要求,提出了具有碳排放约束的协调输配最优潮流(TDOPF)模型。针对输配电网络的不同特点,采用异构分解算法求解优化模型。输配电网络交替优化。通过边界节点电压、注入功率等参数构造辅助函数,确保满足全局网络的最优条件。算例测试表明,该算法具有较高的精度和收敛性。
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引用次数: 0
期刊
2022 4th International Conference on Smart Power & Internet Energy Systems (SPIES)
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