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2022 12th International Conference on Power and Energy Systems (ICPES)最新文献

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Design and Hardware-in-the-Loop Experiment of Robust Fractional-Order Control for VSC-Based HVDC Transmission Systems 基于vsc的直流输电系统鲁棒分数阶控制设计与硬件在环实验
Pub Date : 2022-12-23 DOI: 10.1109/ICPES56491.2022.10073404
Chenxi Fan, Wei Du, Xingye Xu, K. Xiahou
This paper presents a robust fractional-order proportional-integral (FO-PI) control scheme for a voltage-source converter (VSC)-based high-voltage-direct-current (HVD-C) transmission system. Based on the VSC model and fractional calculus theory, robust controllers are designed for the current, active power, reactive power, DC-link voltage loops of rectifier and inverter stations of VSC-HVDC. Experimental studies are undertaken on a hardware-in-the-loop (HIL) testing platform, and the experimental results reveal that the proposed FO-PI scheme has stronger robustness against parameter variations and external disturbances compared with conventional PI control scheme.
针对基于电压源变换器(VSC)的高压直流(HVD-C)输电系统,提出了一种鲁棒分数阶比例积分(FO-PI)控制方案。基于VSC模型和分数阶微积分理论,针对VSC- hvdc整流站和逆变站的电流回路、有功回路、无功回路和直流回路电压回路设计了鲁棒控制器。在硬件在环(HIL)测试平台上进行了实验研究,实验结果表明,与传统PI控制方案相比,所提出的FO-PI方案对参数变化和外部干扰具有更强的鲁棒性。
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引用次数: 0
Evaluation of Minimum Safety Inertia of New Energy Power System Considering Rate of Change of Frequency 考虑频率变化率的新能源电力系统最小安全惯性评估
Pub Date : 2022-12-23 DOI: 10.1109/ICPES56491.2022.10073462
Weiguo Xia, Zhengfeng Wang, Jiwen Wang, Jialin Guo, Kaipeng Wang, Pingping Han
Due to the rapid development of the new energy power system, the increase of new energy permeability, and the grid-connected new energy inverter does not have the inertia support ability, so the frequency stability of the system is seriously affected, and the frequency indicators are gradually close to the safety boundary. In order to solve this problem, this paper first summarizes the inertia index of conventional units, and combs out the effective calculation method of inertia of conventional units. Secondly, this method is extended to the inertia estimation of the new energy power system to evaluate the inertia of the new energy power system. Then, considering the minimum safety inertia evaluation of new energy power system constrained by the rate of change of frequency, the minimum safety inertia coefficient of new energy is defined and taken as the evaluation index. Finally, the IEEE 10-machine 39-node New England Power system model is used to verify the effectiveness of the proposed method.
由于新能源电力系统发展迅速,新能源渗透率增加,并网新能源逆变器不具备惯性支撑能力,因此系统的频率稳定性受到严重影响,频率指标逐渐接近安全边界。为了解决这一问题,本文首先总结了常规机组的惯性指标,梳理出了常规机组惯性的有效计算方法。其次,将该方法推广到新能源电力系统的惯性估计中,对新能源电力系统的惯性进行评估。然后,考虑受频率变化率约束的新能源电力系统最小安全惯性评价,定义新能源最小安全惯性系数作为评价指标;最后,利用IEEE 10机39节点新英格兰电力系统模型验证了所提方法的有效性。
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引用次数: 1
Research on Key Technology of Digital Twin and Its Application in Integrated Energy System 数字孪生关键技术及其在综合能源系统中的应用研究
Pub Date : 2022-12-23 DOI: 10.1109/ICPES56491.2022.10073431
Qi Zhao, Sheng Chen, Xinying Wang, Jie Tian, Rixiao Zhao, Jun Yang
Integrated Energy System (IES) can effectively improve energy utilization efficiency through multi-energy coupling. However, the mechanism is unclear and the randomness of the system is strong, which is difficult for system modeling and operation optimization. Digital twin (DT) can built the twin model in digital space that change synchronously with the physical object, and carry out behavior prediction and intelligent decision-making, which is an effective way to solve the above problems of IES. Focusing on DT, this paper firstly analyzes the development mode of DT system, including symbiosis, evolution and optimization, and puts forward key technology on fusion modeling, neural network optimization and intelligent decision making. Secondly, from the view of source, network, load and storage, this paper deeply summarizes and refines the current methods of the DT model building in IES. Finally, the symbiosis framework of DT model building in IES is proposed, which enables the accurate description and mapping of the system characteristic, and provides accurate model support for the operation optimization in IES.
综合能源系统可以通过多能耦合有效地提高能源利用效率。但其机理不明确,系统随机性强,给系统建模和运行优化带来困难。数字孪生(DT)可以在数字空间中建立与物理对象同步变化的孪生模型,并进行行为预测和智能决策,是解决上述IES问题的有效途径。以DT为重点,首先分析了DT系统的发展模式,包括共生、进化和优化,提出了融合建模、神经网络优化和智能决策等关键技术。其次,从源、网络、负载和存储的角度,对目前IES中DT模型的构建方法进行了深入的总结和提炼。最后,提出了在IES中建立DT模型的共生框架,实现了对系统特性的准确描述和映射,为IES中的运行优化提供了准确的模型支持。
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引用次数: 0
Analysis of Harmonic Overvoltage Caused by Inrush Current of Closing No-load Transformer 合闸空载变压器涌流引起谐波过电压分析
Pub Date : 2022-12-23 DOI: 10.1109/ICPES56491.2022.10073162
H. Yanan, Z. Peipeng, Xiang Zutao, Shen Lin, Xiang Weihua, Du Ning
The excitation inrush current generated by the closing no-load transformer propagates in the power grid, and may cause a temporary overvoltage rise of the bus node after being injected into the system, and the harmonic content is rich. In this paper, the simulation analysis of 500kV and 1000kV typical systems in different system operation modes and different annual modes were carried out, and the suppression effect of measures such as phase selection closing, closing resistance, and adjustment operation mode were studied. The conclusion showed that the phase-selective closing and closing resistors installed in the circuit breaker can reduce the inrush current, but the effect of suppressing such overvoltage was very small. Adjusting the operating mode was the best for suppressing such harmonic overvoltages.
合闸空载变压器产生的励磁涌流在电网中传播,注入系统后可能引起母线节点暂时过压上升,谐波含量丰富。本文对500kV和1000kV典型系统在不同系统运行方式和不同年模式下进行了仿真分析,研究了选相合闸、合闸电阻、调整运行方式等措施的抑制效果。结论表明,在断路器中安装相选择合闸和合闸电阻可以减小浪涌电流,但抑制过电压的效果很小。调节工作模式是抑制谐波过电压的最佳方法。
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引用次数: 0
Scheme Comparison of Substation Expansion and Energy Storage Station Co-construction Based on Improved AHP-FCE 基于改进AHP-FCE的变电站扩建与储能站共建方案比较
Pub Date : 2022-12-23 DOI: 10.1109/ICPES56491.2022.10073025
Jianhua Huang, Haohui Xie, H. Ouyang, Zhangyang Sun, Nanxing Chen, Z. Du
With the development of the social economy, the increase in urban load density leads to the shortage of substation power supply capacity. In order to meet the demand for short-term peak load, two schemes are typically adopted: substation capacity expansion and co-construction of energy storage stations. However, both schemes have their advantages and disadvantages. In order to better select the scheme, it is necessary to establish a reasonable comprehensive evaluation index system. This paper proposes a scheme comparison method based on improved AHP (Analytical Hierarchy Process) – FCE (Fuzzy Comprehensive Evaluation). We construct the evaluation index system for substation capacity expansion and co-construction of energy storage stations. Then, the comprehensive evaluation scores under the two schemes are obtained using the AHP method to calculate the weight of each index, combined with fuzzy comprehensive evaluation.
随着社会经济的发展,城市负荷密度的增加导致变电站供电能力不足。为满足短期高峰负荷的需求,一般采用变电站扩容和储能站共建两种方案。然而,这两种方案都有其优点和缺点。为了更好地选择方案,有必要建立合理的综合评价指标体系。提出了一种基于改进的层次分析法-模糊综合评价法的方案比较方法。构建了变电站扩容与储能站共建的评价指标体系。然后,采用AHP法计算各指标的权重,结合模糊综合评价得到两种方案下的综合评价得分。
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引用次数: 0
Research on Energy Storage Type of Uninterruptible Power Supply Technology in Internet Data Center 互联网数据中心储能型不间断电源技术研究
Pub Date : 2022-12-23 DOI: 10.1109/ICPES56491.2022.10072858
Peng Peng, Man Chen, Yuxuan Li, Yuxin Zhao, Ningning Li, Hao Liu, Bing Wang, Yushu Sun, Xisheng Tang
As the batteries of Uninterruptible Power Supply (UPS) in the Internet Data Center (IDC) is only effective in the case of power failures, the large amounts of batteries are idle during normal operation. To meet the efficient, green and reliable power supply requirements of IDC, and activate the “sunk asset” of UPS batteries, the Energy storage type of UPS (EUPS) architecture with bidirectional power regulation and active grid support is proposed in this paper. The main target is to maximize the use of batteries in UPS through the function upgrading from backup to energy storage. The topology and control strategy of EUPS are analyzed first. And the cooperative mechanism of EUPS participating in the grid fast frequency and voltage regulation, AGC, AVC, peak-valley shaving and their combined is interpreted accordingly. Finally, the effectiveness of EUPS and its control strategy are verified through simulation cases.
由于IDC (Internet Data Center) UPS (Uninterruptible Power Supply)的电池只有在断电的情况下才有效,因此在正常运行过程中会有大量的电池处于闲置状态。为了满足IDC高效、绿色、可靠的供电需求,激活UPS电池的“沉没资产”,本文提出了双向功率调节、有源电网支持的储能型UPS (EUPS)架构。主要目标是通过从备用到储能的功能升级,最大限度地利用UPS中的电池。首先分析了该系统的拓扑结构和控制策略。并据此解释了EUPS参与电网快速调频调压、AGC、AVC、峰谷调峰及其组合的合作机制。最后,通过仿真实例验证了EUPS及其控制策略的有效性。
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引用次数: 1
Distributed Operation Strategy of Electricity-Gas Integrated System Based on Improved ADMM 基于改进ADMM的电-气集成系统分布式运行策略
Pub Date : 2022-12-23 DOI: 10.1109/ICPES56491.2022.10072950
Bo Pan, Yumin Tian, Kuangwei Chen, Weimeng Li, Xing Tang
The coupling degree of electricity and gas systems is deepening nowadays. This paper proposes a distributed operation strategy based on improved alternate direction multiplier method (ADMM). Firstly, the gas turbine and energy storage equipment models are established, in which the radial distribution network and the natural gas network model considering dynamic characteristics are considered. Secondly, a day-ahead scheduling model with operating cost as the objective function is established. And the uncertainty of renewable energy is handled with chance constraints. In addition, a distributed optimal operation method based on ADMM with adaptive step size is proposed with consideration of the information opacity between the electricity and gas systems. Finally, the rationality and effectiveness of the proposed model and optimization framework for the electricity-gas system are verified through case studies.
目前,电、气系统的耦合度不断加深。提出了一种基于改进型交替方向乘数法(ADMM)的分布式操作策略。首先,建立了燃气轮机和储能设备模型,其中考虑了径向配电网和考虑动态特性的天然气网络模型;其次,建立了以运行成本为目标函数的日前调度模型;利用机会约束来处理可再生能源的不确定性。此外,考虑了电、气系统间的信息不透明性,提出了一种基于自适应步长ADMM的分布式优化运行方法。最后,通过实例验证了所提模型和优化框架在电-气系统中的合理性和有效性。
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引用次数: 0
Frequency Shaping Control of Deloaded PV System Coordinated with Synchronous Generators 与同步发电机协调的无负载光伏系统频率整形控制
Pub Date : 2022-12-23 DOI: 10.1109/ICPES56491.2022.10072908
Aolin Jian, Yong Sun, Lei Chen, Y. Min, Ruikuo Liu, Fangzheng Wang
In a power system with growing proportion of photo-voltaic (PV) generation and decreasing proportion of synchronous generators, the frequency regulation capability is becoming weak. To implement frequency control on PV, additional energy storage or power deloading is required, which brings additional cost to the PV station. Official technical standards and grid codes in a few countries and regions have specified the requirements for PV frequency control. Following the typical standard of frequency droop control, it is necessary to utilize the remaining PV power reserve to improve frequency characteristics such as frequency nadir and rate of change of frequency (RoCoF), and frequency shaping (FS) control is a promising solution for this task. With parameter tuning based on system model, frequency shaping control is implemented together with a fixed droop required by the grid code. The control strategy is tested with simulation, which shows frequency response with nadir eliminated and RoCoF improved. Moreover, a possible distributed and robust parameter tuning method for PV units in multi-machine system is discussed in the paper.
在光伏发电比重不断增加、同步发电机比重不断减少的电力系统中,频率调节能力逐渐变弱。对光伏电站实施变频调速,需要增加储能或电力负荷,这给光伏电站带来了额外的成本。少数国家和地区的官方技术标准和电网规范都对光伏变频调速提出了要求。按照频率下垂控制的典型标准,有必要利用剩余的光伏电力储备来改善频率最低点和频率变化率(RoCoF)等频率特性,频率整形(FS)控制是一种很有前途的解决方案。通过基于系统模型的参数整定,结合网格编码要求的固定下垂实现频率整形控制。通过仿真验证了该控制策略的有效性,结果表明该控制策略消除了最低点,改善了时延。此外,本文还讨论了一种可能的分布式鲁棒光伏机组多机系统参数整定方法。
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引用次数: 0
Analysis of Vibration Characteristics of Dry-Type Transformer Iron Core and Windings Based on Multi Physical Field 基于多物理场的干式变压器铁芯及绕组振动特性分析
Pub Date : 2022-12-23 DOI: 10.1109/ICPES56491.2022.10072747
Zaihua Wang, Shu-lian Liu, Ling Zhang
Vibration and noise are problems that cannot be ignored in the normal operation of transformers, the vibration of transformers is coupled by windings and cores, how to distinguish between vibration caused by cores and vibration caused by windings are more critical in transformer vibration fault diagnosis. The vibration of the transformer caused by magnetostriction of the iron core under no load and the vibration of the transformer caused by a short circuit are two typical working conditions. Therefore, in this paper, based on SB20-400VA three-phase three-pillar dry-type transformer, the electric-magnetic-force multi-physical field model of the dry-type transformer is built by COMSOL software, and the vibration characteristics under different working conditions are extracted by simulation under no-load and short-circuit. By analyzing vibration characteristics of the fundamental frequency and harmonic frequency signals, the identification method to distinguish the transformer short-circuit and no-load vibration is found, which lays the foundation for the fault diagnosis of transformer vibration.
振动和噪声是变压器正常运行中不可忽视的问题,变压器的振动是由绕组和铁芯耦合产生的,如何区分铁芯引起的振动和绕组引起的振动是变压器振动故障诊断中更为关键的问题。空载下铁芯磁致伸缩引起的变压器振动和短路引起的变压器振动是两种典型的工况。因此,本文基于SB20-400VA三相三柱干式变压器,利用COMSOL软件建立干式变压器的电磁力多物理场模型,通过空载和短路仿真提取不同工况下的振动特性。通过分析基频和谐波信号的振动特征,找到了区分变压器短路和空载振动的识别方法,为变压器振动的故障诊断奠定了基础。
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引用次数: 1
Interval Coalition Game-Based Peer-to-Peer Energy Trading Method for Multi-microgrids 基于区间联盟博弈的多微电网点对点能源交易方法
Pub Date : 2022-12-23 DOI: 10.1109/ICPES56491.2022.10072531
Kai Zhang, Luhao Wang, Shengnan Zhao, Shiyuan He, Fengchen Song, Xiuhan Lin
Multi-microgrids (MMGs) are derived from microgrids (MGs) penetration into the distribution networks. To promote the local consumption of renewable energy and reduce the power transmission losses of distribution networks, an interval coalition game-based peer-to-peer energy trading method for MMGs is proposed in this paper. First, an interval optimization-based many-to-one sealed bid auction mechanism is designed to determine the coalition for MGs and alleviate the impacts of uncertainties in peer-to-peer energy trading processes. Second, the interval Shapley value method is applied to fairly allocate the utility of each MG in the corresponding coalition. Finally, compared with the traditional transaction methods, simulation results verify the feasibility and effectiveness of the proposed method.
多微电网是由于微电网渗透到配电网中而产生的。为了促进可再生能源的本地消费,降低配电网的输电损耗,提出了一种基于区间联盟博弈的mmg点对点能源交易方法。首先,设计了一种基于区间优化的多对一密封竞价机制,以确定mg的联盟,减轻点对点能源交易过程中不确定性的影响。其次,采用区间Shapley值法公平分配各MG在相应联盟中的效用。最后,通过与传统交易方法的比较,仿真结果验证了所提方法的可行性和有效性。
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引用次数: 0
期刊
2022 12th International Conference on Power and Energy Systems (ICPES)
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