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2023 5th Asia Energy and Electrical Engineering Symposium (AEEES)最新文献

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Extraction of Fault Characteristic Frequency Band of Photovoltaic DC Series Arc Based on Wavelet Packet Transform and Tsallis Entropy 基于小波包变换和Tsallis熵的光伏直流串联电弧故障特征频带提取
Pub Date : 2023-03-23 DOI: 10.1109/AEEES56888.2023.10114208
Wenkang Xu, L. Yao, Jinshan Qi, Shiming Tian, Xuemei Zhang, Mingming Pan, Xin Wu
The fault characteristics of photovoltaic (PV) DC series arc are scattered in the MHz-level broadband, so extracting the fault characteristic frequency band to enhance the characteristic information is of great significance for the efficient detection of arc faults. In this paper, a Cassie model-based photovoltaic DC series arc fault simulation is first established in PSACD. The output current of the photovoltaic array with two power frequency cycles before and after the fault is used as the signal analysis unit. The combination of mother wavelet and decomposition layer number is optimized by using Tsallis wavelet packet singular entropy (TWPSE). Then, based on the optimal combination, the signal analysis unit is decomposed and reconstructed by wavelet packet, and the Tsallis entropy ratio before and after the fault of each frequency band is calculated to determine the fault characteristic frequency band. Finally, the energy ratio analysis is carried out on the characteristic frequency bands obtained by the optimal and non-optimal combinations, and it is found that the fault characteristic frequency band extracted by the former has the largest energy ratio. The results show that the fault characteristic frequency band extracted by optimal combination can effectively enhance the fault feature, and is more conducive to efficient detection of photovoltaic DC series arc faults.
光伏直流串联电弧的故障特征分散在mhz级宽带内,因此提取故障特征频带增强特征信息对于高效检测电弧故障具有重要意义。本文首次在PSACD中建立了基于Cassie模型的光伏直流串联电弧故障仿真。以光伏阵列故障前后两个工频周期的输出电流作为信号分析单元。利用Tsallis小波包奇异熵(TWPSE)对母小波和分解层数的组合进行优化。然后在最优组合的基础上,对信号分析单元进行小波包分解重构,计算各频段故障前后的Tsallis熵比,确定故障特征频段。最后,对最优组合和非最优组合得到的特征频带进行能量比分析,发现前者提取的故障特征频带能量比最大。结果表明,优化组合提取的故障特征频带能有效增强故障特征,更有利于光伏直流串联电弧故障的高效检测。
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引用次数: 0
A Multidimensional Adaptive Assessment Model for Innovative Technologies in New-Type Power System 新型电力系统创新技术的多维自适应评估模型
Pub Date : 2023-03-23 DOI: 10.1109/AEEES56888.2023.10114295
Wei Fan, Dongming Liu, Zhe Yang, Yu Liu, Cheng Yang, Qingbin Zeng
With the continuous development of new-type power systems, all kinds of innovative technologies have come into being. However, due to the scattered development of various technologies and the lack of co-ordinated planning, it makes some of the innovative technologies ignore the optimisation of investment in order to achieve the expected construction goals. Therefore, in order to guide grid enterprises and promote technology application and planning, the construction conditions of innovative technologies for new power systems are analysed and a three-dimensional spatial three-dimensional evaluation system is established, taking into account the spatial and temporal resources required for technology construction. The continuous interval ordered weighted average operator is used to improve the subjective and objective comprehensive assignment method, reducing the subjectivity of the evaluation and improving the compatibility of the evaluation system. Finally, the fuzzy comprehensive evaluation method is used to determine the affiliation degree of each index, and then the evaluation level of the new energy network innovation technology is obtained. The results show that the proposed method can identify the adaptability of innovative technologies to different time and space and the suitability of different time and space for a certain technology application in both directions.
随着新型电力系统的不断发展,各种创新技术层出不穷。但由于各种技术发展分散,缺乏统筹规划,使得部分创新技术忽视了投资的优化,无法实现预期的建设目标。因此,为了引导电网企业,促进技术应用与规划,结合技术建设所需的时空资源,分析了新电力系统创新技术的建设条件,建立了三维空间立体评价体系。利用连续区间有序加权平均算子改进了主客观综合赋值法,降低了评价的主观性,提高了评价体系的兼容性。最后,利用模糊综合评价法确定各指标的隶属度,进而得到新能源网络创新技术的评价等级。结果表明,所提出的方法可以双向识别创新技术对不同时空的适应性,以及不同时空对某项技术应用的适宜性。
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引用次数: 0
Research on Power Distribution Operation and Maintenance Security Technology Based on Z Algorithm 基于Z算法的配电运维安全技术研究
Pub Date : 2023-03-23 DOI: 10.1109/AEEES56888.2023.10114224
Jian Gao, Xiang Gu, Hong Wang, Ganghong Zhang
This paper designs and proposes a secure operation and maintenance system based on Z password algorithm for the security requirements of electric Internet of Things, identity authentication and session key negotiation of handheld operation and maintenance terminal devices in wireless environment. The design idea of deep fusion of user key and algorithm is different from the traditional block cipher design which emphasizes the standardization of algorithm and secret key. The variable password logic of fusion of key and algorithm ensures the different logical structure of password algorithm among different users. Different logic not only refers to different password parameters used, but also different hierarchical structures, different operations, different components, and different data flows, so as to ensure that all users adopt different password algorithms, which can be called "one person one secret + one time one secret", which greatly improves the security of the system. The design considers the safety requirements such as instance safety, system safety and distance safety, and realizes the safety operation and maintenance and software realization in the aspect of power intelligent terminal, so as to facilitate the management and update.
本文针对无线环境下手持式运维终端设备的电子物联网安全需求、身份认证和会话密钥协商,设计并提出了一种基于Z密码算法的安全运维系统。用户密钥与算法深度融合的设计思想不同于传统分组密码设计强调算法和密钥的标准化。密钥与算法融合的可变密码逻辑保证了不同用户之间密码算法的逻辑结构不同。不同的逻辑不仅是指使用不同的密码参数,还包括不同的层次结构、不同的操作、不同的组件、不同的数据流,从而保证所有用户采用不同的密码算法,可称为“一人一密+一次一密”,大大提高了系统的安全性。本设计考虑了实例安全、系统安全、距离安全等安全要求,在电力智能终端方面实现了安全运维和软件实现,便于管理和更新。
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引用次数: 0
Study on Low Carbon Economic Dispatch of Cogeneration Microgrid 热电联产微电网低碳经济调度研究
Pub Date : 2023-03-23 DOI: 10.1109/AEEES56888.2023.10114367
Siying Li, Jun Yi, Weifang Lin
In order to reach the carbon peaking and carbon neutrality goals, our country adopted a carbon trading system on tax policy, which can stimulate and promote enterprises’ energy saving activities. Actively introduce carbon capture equipment in technology, reducing carbon dioxide emissions from the root. In this paper, the low carbon economy operation dispatch of cogeneration microgrid with carbon capture technology is proposed. Under the condition of taking into account the traditional carbon trading system, the overall operating cost of the system is minimized as the objective function, including the system electricity purchase cost, gas purchase cost, carbon trading cost and system operation and maintenance cost interacting with the superior main network. In addition, considering the electrical balance constraint, thermal balance constraint and equipment constraint of the system, a microgrid model is established and solved. Various costs and carbon emissions of the two scenarios are compared and analyzed, and the low-carbon economic benefits of the proposed scheduling model are confirmed. The influence of the change of carbon trading price on net carbon emissions and system operation status is analyzed.
为了达到碳调峰和碳中和的目标,我国在税收政策上采用了碳交易制度,可以刺激和促进企业的节能活动。在技术上积极引进碳捕集设备,从根本上减少二氧化碳的排放。本文提出了采用碳捕集技术的热电联产微网低碳经济运行调度。在考虑传统碳交易系统的情况下,以最小化系统总体运行成本为目标函数,包括系统购电成本、购气成本、碳交易成本和系统与上级主网交互的运维成本。此外,考虑系统的电平衡约束、热平衡约束和设备约束,建立并求解了微电网模型。对比分析了两种方案的各项成本和碳排放,确认了所提出调度模式的低碳经济效益。分析了碳交易价格变化对净碳排放量和系统运行状况的影响。
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引用次数: 0
Spatiotemporal Load Regulation Modeling for Internet Data Centers with Applications to Wind Power Fluctuation Suppression 互联网数据中心负荷时空调节模型及其在风力发电波动抑制中的应用
Pub Date : 2023-03-23 DOI: 10.1109/AEEES56888.2023.10114214
Wenrui Liu, Kainan Wei, Xueying Yan, C. Qin
Due to the increasing load power and its flexible spatiotemporal transfer characteristics, internet data centers (IDC) can participate in power system planning and operation as a kind of demand response resource. In this paper, IDC spatiotemporal load regulation potentials modeling method is presented and applied in wind power fluctuation suppression. Firstly, the IDC load regulation model is constructed with the constraints of safe and reliable operation of servers and quality of service of network requests. The IDC load power regulation can be utilized by the allocation and delay of interactive and batch request. Then, it is applied to suppress wind power fluctuations, the economic scheduling strategy with the objective of cost minimizing is proposed. Case study shows the effectiveness of this method.
互联网数据中心由于其不断增加的负荷功率及其灵活的时空转移特性,可以作为一种需求响应资源参与电力系统的规划和运行。本文提出了IDC时空负荷调节电位建模方法,并将其应用于风力发电波动抑制中。首先,以服务器安全可靠运行和网络请求服务质量为约束,构建IDC负载调节模型;通过对交互请求和批处理请求的分配和延迟,可以利用IDC负载功率调节。然后,将其应用于抑制风电波动,提出了以成本最小化为目标的经济调度策略。实例分析表明了该方法的有效性。
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引用次数: 0
Modelling for Active Power Characteristic of Electrolytic Magnesium Industry Based on Industrial Process Analysis 基于工业过程分析的电解镁工业有功功率特性建模
Pub Date : 2023-03-23 DOI: 10.1109/AEEES56888.2023.10114122
Dongzhi Cao, S. Liao, L. Yao, R. Wang, Zhengwen Li, Jiahao Yan, Yaping Li
As an important high -energy -consuming industrial load, electrolytic magnesium can continuously adjust the power in a large range. It is of great significance to thoroughly tap the power regulation potential of electrolytic magnesium industrial load for improving the flexibility of power system and promoting the consumption of renewable energy. The assessment of power regulation potential depends on the construction of accurate load models. Thus, it is urgent to construct a delicate model for the active power characteristic of electrolytic magnesium industry. Based on analyzing the industrial process of electrolytic magnesium, this paper firstly combs the main electric equipment of electrolytic magnesium industry. Then based on the electrical characteristics of the main electric equipment, this paper constructed their external characteristic models of representing the relationship between active power and voltage, and constructed the active power characteristic model of electrolytic magnesium load by superimposing the power of above models. Finally, this paper used the measured PMU data of a magnesium factory to identify the key parameters of the model and verified the effectiveness of the model by comparing the measured active power curve with the model’s output active power curve and calculating the simulation error.
电解镁作为一种重要的高耗能工业负载,可以在大范围内连续调节功率。深入挖掘电解镁工业负荷的电力调节潜力,对于提高电力系统的灵活性,促进可再生能源的利用具有重要意义。电力调节潜力的评估依赖于准确负荷模型的建立。因此,迫切需要建立一个精细的电解镁工业有功功率特性模型。本文在分析电解镁工业流程的基础上,首先对电解镁工业的主要电气设备进行了梳理。然后根据主要用电设备的电气特性,构建了代表其有功功率与电压关系的外部特性模型,并将上述模型的功率叠加,构建了电解镁负荷有功功率特性模型。最后,本文利用某镁厂PMU实测数据,对模型的关键参数进行辨识,并通过实测有功功率曲线与模型输出有功功率曲线的对比,计算仿真误差,验证了模型的有效性。
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引用次数: 0
Operation Optimization Model for Photovoltaic User Group with Shared Storage and Demand Response 具有共享存储和需求响应的光伏用户群运行优化模型
Pub Date : 2023-03-23 DOI: 10.1109/AEEES56888.2023.10114187
Shuqi Jiang, Jingda Gu, Pu Zhang, Wei Li, Fangmin Wang, W. Pei
In recent years, with the increase of the penetration of distributed photovoltaics in the power system, the problems of power fluctuations have increased. The corresponding application of the demand side response has played a positive role in the stability and economy of the power system. First of all, a cost model related to the system net load and energy storage is proposed, which is based on the policy support and the recent technology of distributed photovoltaic in China. Secondly, an optimal operation model for photovoltaic user group with shared energy storage considering automatic demand response is proposed based on game theory and it is proved to have a unique Nash equilibrium strategy. The process of solving the Nash equilibrium strategy is equivalent to a two-level optimization model, and the solving method is proposed based on a differential evolution algorithm. Finally, a practical example is used to verify the effectiveness of the model in reducing user costs and optimizing load characteristics.
近年来,随着分布式光伏在电力系统中渗透率的增加,电力波动问题也随之增加。需求侧响应的相应应用对电力系统的稳定性和经济性起到了积极的作用。首先,基于政策支持和国内分布式光伏的最新技术,提出了与系统净负荷和储能相关的成本模型。其次,基于博弈论,提出了考虑自动需求响应的共享储能光伏用户群最优运行模型,并证明该模型具有独特的纳什均衡策略。将求解纳什均衡策略的过程等效为一个两级优化模型,并提出了基于差分进化算法的求解方法。最后,通过实例验证了该模型在降低用户成本和优化负荷特性方面的有效性。
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引用次数: 0
Influence Analysis of New Energy Proportion in the AC System on DC Fault Current of the MMC-HVDC System 交流系统新能量比例对MMC-HVDC系统直流故障电流的影响分析
Pub Date : 2023-03-23 DOI: 10.1109/AEEES56888.2023.10114072
Siyuan Liu, Botong Li, A. Li, Bin Li, Weijie Wen, Liang Ji
The paper study the influence of new energy of AC system on DC fault current characteristics in MMC-HVDC system. Analyze the equivalent method of MMC converter station when MMC-HVDC system occurs DC fault, compare the DC fault current value calculated by the two equivalent methods of the RLC series circuit and the RLC series circuit for a constant current source parallel at both sides of the capacitor with the PSCAD model simulation value, it is concluded that the fault current calculation method considering the influence of AC system is more accurate. Analyze the change of DC fault current of MMC-HVDC system under different proportions of new energy in the AC system, the results show that the proportion of new energy in the AC system has little influence on the DC fault current.
本文研究了交流系统新能源对MMC-HVDC直流故障电流特性的影响。分析MMC- hvdc系统发生直流故障时MMC换流站的等效方法,将RLC串联电路和RLC串联电路两种等效方法对电容器两侧并联恒流源计算的直流故障电流值与PSCAD模型仿真值进行比较,得出考虑交流系统影响的故障电流计算方法更为准确。分析了交流系统中不同新能源比例下MMC-HVDC系统直流故障电流的变化,结果表明,交流系统中新能源比例对直流故障电流的影响很小。
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引用次数: 0
Development of a Grid Adaptability Evaluation Method for Systems with Renewable Energy Connected to Weakly-Synchronized Sending-End DC Power Grid 弱同步送电端直流电网可再生能源系统电网适应性评估方法研究
Pub Date : 2023-03-23 DOI: 10.1109/AEEES56888.2023.10114145
Yanzhang Liu, Ning Chen, Ling-zhi Zhu, Lei Zhang
With the increasing proportion of power electronic equipment, the inertia of power system continues to decrease, and the stability of synchronous power grid based on rotor operation equation has changed greatly. For the systems with renewable energy connected to weakly-synchronized sending-end DC power grid, due to overvoltage, oscillation and other problems, the operation risks of power grid are increased. At present, the existing monitoring methods are not able to obtain the in-depth information of grid connection adaptability and support capacity. A new grid adaptability evaluation method considering the SCADA data is proposed. According to the application scenarios, a multi-level architecture is designed, which carries out evaluation index calculation at the station-level for high real-time requirements, and transfers the results to superior-level for comprehensive analysis. The method can be popularized and applied to the grid operation monitoring of renewable energy, which may plays an important role in improving the stability of weakly-synchronized sending-end DC power grid.
随着电力电子设备比重的增加,电力系统的惯性不断减小,基于转子运行方程的同步电网的稳定性发生了很大的变化。可再生能源系统接入弱同步送电端直流电网后,由于过电压、振荡等问题,电网运行风险增大。目前,现有的监测方法无法获得电网接入适应性和支持能力的深入信息。提出了一种考虑SCADA数据的电网适应性评价方法。根据应用场景,设计了多级体系结构,对实时性要求高,在站级进行评价指标计算,并将计算结果传递给上级进行综合分析。该方法可推广应用于可再生能源电网运行监测,对提高弱同步送电端直流电网的稳定性起到重要作用。
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引用次数: 0
Research Progress and Development Trend of Reducing the Influence of Frequency Mutation on Power Grid 降低频率突变对电网影响的研究进展及发展趋势
Pub Date : 2023-03-23 DOI: 10.1109/AEEES56888.2023.10114079
Zhuoyao Chen, Sipeng Hao, Menglin Cui
Under the background of the accelerating economic development, the traditional power grid and the production development of modern society have been difficult to meet the needs of modern society. Therefore, in order to better improve the timeliness of power grid management, it is necessary to integrate the current big data and information technology into the power grid management to strengthen the timeliness of fault detection and maintenance in the process of real-time monitoring. So as to provide more reliable power supply for daily production and life. This paper will analyze the research progress and development trend of reducing the impact of frequency mutation on power grid.
在经济加速发展的背景下,传统的电网和现代社会的生产发展已经难以满足现代社会的需要。因此,为了更好地提高电网管理的时效性,有必要将当前的大数据和信息化技术融入电网管理中,在实时监控过程中加强故障检测和维护的时效性。从而为日常生产和生活提供更可靠的电源。本文将分析降低频率突变对电网影响的研究进展和发展趋势。
{"title":"Research Progress and Development Trend of Reducing the Influence of Frequency Mutation on Power Grid","authors":"Zhuoyao Chen, Sipeng Hao, Menglin Cui","doi":"10.1109/AEEES56888.2023.10114079","DOIUrl":"https://doi.org/10.1109/AEEES56888.2023.10114079","url":null,"abstract":"Under the background of the accelerating economic development, the traditional power grid and the production development of modern society have been difficult to meet the needs of modern society. Therefore, in order to better improve the timeliness of power grid management, it is necessary to integrate the current big data and information technology into the power grid management to strengthen the timeliness of fault detection and maintenance in the process of real-time monitoring. So as to provide more reliable power supply for daily production and life. This paper will analyze the research progress and development trend of reducing the impact of frequency mutation on power grid.","PeriodicalId":272114,"journal":{"name":"2023 5th Asia Energy and Electrical Engineering Symposium (AEEES)","volume":"21 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-03-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124968850","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
期刊
2023 5th Asia Energy and Electrical Engineering Symposium (AEEES)
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