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

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The analysis on the influence of cable laying mode on fire spread trend 电缆敷设方式对火灾蔓延趋势的影响分析
Pub Date : 2022-04-01 DOI: 10.1109/ACPEE53904.2022.9783626
Zhang Hao, Ma Guoqing, Lian Pengfei, Duan Yubing, Shi Wei, Wang Xiaolong
The cable is widely used as an important power transmission carrier. In order to better guide the construction of cable lines and rescue work after fire, this paper studies the effects of cable spacing, cable arrangement and cable layers on the fire spread trend in cable tunnel. In this paper, the simulation software named Pyrosim is used to build the model, and the flue gas content, CO concentration, CO2 concentration and HCl concentration are taken as the fire state indexes. The general law of the influence of the laying mode of the cable body on the fire spread trend is obtained: the smaller the cable spacing is, the later the generation time of CO and HCl is; The temperature rise of parallel cables during combustion is low, and less toxic gases such as CO and HCl are produced; When the cable is laid in fewer layers, the time of CO produced by cable combustion is earlier; The number of cable layers has little effect on the generation rate of CO2 and HCl in the early stage.
电缆作为重要的电力传输载体被广泛使用。为了更好地指导电缆线路的施工和火灾后的救援工作,本文研究了电缆间距、电缆布置、电缆层数对电缆隧道火灾蔓延趋势的影响。本文采用模拟软件Pyrosim建立模型,以烟气含量、CO浓度、CO2浓度和HCl浓度作为火灾状态指标。得到了电缆体敷设方式对火灾蔓延趋势影响的一般规律:电缆间距越小,CO和HCl的生成时间越晚;并联电缆燃烧时温升低,CO、HCl等有毒气体产生少;敷设层数越少,电缆燃烧产生CO的时间越早;电缆层数对早期CO2和HCl的生成速率影响不大。
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引用次数: 0
Low carbon planning of power system based on stepped carbon tax considering thermal power support in the context of 3060 60年背景下考虑火电支持的阶梯碳税电力系统低碳规划
Pub Date : 2022-04-01 DOI: 10.1109/ACPEE53904.2022.9783986
Zesen Wang, Tianqi Zhao, X. Xia, Jing Luo, Yinglin Liu, Jing Hao
In the context of '3060', carbon peaking and carbon neutrality of the power system is a daunting task. It is a feasible solution to induce the power system to develop in the low carbon direction by establishing a step carbon trading system. This paper establishes the emission reduction interval and step carbon tax model through mathematical methods, and uses suitable functions to portray the carbon peaking and carbon neutral process. At the same time, this paper considers the role of thermal power units in safeguarding the power system with high proportion of renewable energy, and on this basis, the power system model with carbon reduction target is established. The feasibility of the method in this paper is verified by bringing it into the actual arithmetic ieee-24 node model at the end.
在“3060”的背景下,电力系统的碳峰值和碳中和是一项艰巨的任务。建立阶梯式碳交易制度是引导电力系统向低碳方向发展的可行方案。本文通过数学方法建立了减排区间和阶梯碳税模型,并用合适的函数来刻画碳峰值和碳中和过程。同时,考虑火电机组对高比例可再生能源电力系统的保障作用,并在此基础上建立了具有碳减排目标的电力系统模型。最后将该方法引入到实际的算法ieee-24节点模型中,验证了本文方法的可行性。
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引用次数: 1
A Method to Calculate the Comprehensive Cost of Electric Power System Peak Regulation Considering Flexible Resource Investment 考虑柔性资源投资的电力系统调峰综合成本计算方法
Pub Date : 2022-04-01 DOI: 10.1109/ACPEE53904.2022.9783866
Zhang Jing, Zhang Tao, Hu Yuou, Zhao Guixin, Zhuang Baisong
Under the “double carbon” goal, high wind power penetration will become an important feature of new power systems dominated by new energy in the future. Since wind power often has anti-peak shaving characteristics, the peak shaving problem of wind power high-penetration power systems is particularly prominent. Quantitative calculation of the system peak shaving cost of a high proportion of wind power grids is of great significance to the establishment and improvement of the peak shaving market in the northern part of our country, the promotion of rational system development and planning flexibility, and the improvement of system flexibility. Based on the analysis of existing wind power system peak shaving cost estimation methods, this paper proposes a comprehensive cost estimation method for system peak shaving under high wind power penetration rate, considering flexible resource investment and peak shaving market, and studies different wind power systems. The changing law of system peak shaving cost under the penetration rate; and the actual power system in a certain area of my country is used to simulate the peak shaving cost under different wind power penetration, which shows the effectiveness and rationality of the method.
在“双碳”目标下,风电高渗透率将成为未来以新能源为主的新电力系统的重要特征。由于风电往往具有反调峰特性,风电高渗透电力系统的调峰问题尤为突出。定量计算高比例风电电网的系统调峰成本,对于我国北方地区调峰市场的建立和完善,促进系统合理发展和规划灵活性,提高系统灵活性具有重要意义。本文在分析现有风电系统调峰成本估算方法的基础上,提出了一种考虑柔性资源投资和调峰市场的高风电渗透率下系统调峰成本综合估算方法,并对不同的风电系统进行了研究。渗透率下系统调峰成本的变化规律并以我国某地区实际电力系统为例,对不同风电穿透度下的调峰成本进行了仿真,验证了该方法的有效性和合理性。
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引用次数: 2
Coefficient Calculation Method of Virtual Resistance Based P-V Droop Control in VSC-MVDC System 基于虚电阻的VSC-MVDC系统P-V下垂控制系数计算方法
Pub Date : 2022-04-01 DOI: 10.1109/ACPEE53904.2022.9784070
Hongbo Shao, Wanxun Liu, Yuming Cheng, Xin Cao, Hanhao Li, Minxiao Han
The N-1 principle requires that, when one converter in the voltage sourced converter based medium voltage DC distribution system (VSC-MVDC) is out of operation due to failure or overhaul, the remaining system should be able to remain stable. In this case, the DC voltage change will become a serious problem. Droop control brings a feasible solution dealing with this problem. In this paper, a calculation method of P-V droop coefficient based on virtual resistance is proposed to optimize the droop control coefficient and control the DC voltage stability. Firstly, the relationship between the voltage of DC nodes and the voltage of point of common coupling (PCC) is analyzed. Thereafter, the relationship between bridge arm voltage of converter station and DC node voltage is established according to virtual resistance. The calculation method of P-V droop coefficient based on virtual resistance is then derived according to the above analyses. The calculation method was then analyzed at two extreme conditions and a control dead zone was found to exist at one extreme condition. Therefore, a corresponding solution that recalculating the droop coefficient by introducing the error of active power reference is proposed to improve the control strategy. Finally, a three-terminal VSC-MVDC model is built in PSCAD/EMTDC. Simulation results show that the proposed method for P-V droop control has a better performance as compared with general control strategies.
N-1原理要求,当基于电压源变流器的中压直流配电系统(vcs - mvdc)中的一个变流器因故障或大修而停止运行时,其余系统应能够保持稳定。在这种情况下,直流电压的变化将成为一个严重的问题。下垂控制为解决这一问题提供了可行的解决方案。本文提出了一种基于虚电阻的P-V下垂系数计算方法,以优化下垂控制系数,控制直流电压稳定性。首先,分析了直流节点电压与共耦合点(PCC)电压的关系。然后根据虚电阻建立换流站桥臂电压与直流节点电压的关系。在此基础上,推导了基于虚电阻的P-V下垂系数的计算方法。分析了两种极端情况下的计算方法,发现在一种极端情况下存在控制死区。为此,提出了引入有功基准误差重新计算下垂系数的解决方案,以改进控制策略。最后,在PSCAD/EMTDC中建立了三端VSC-MVDC模型。仿真结果表明,与一般控制策略相比,该方法具有更好的俯仰控制性能。
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引用次数: 0
Simulation analysis of lightning performance of 1000kV UHV-AC transmission lines 1000kV特高压交流输电线路防雷性能仿真分析
Pub Date : 2022-04-01 DOI: 10.1109/ACPEE53904.2022.9783652
Mian Fan, Lei Wan, Ying Lou, Zhijun Li
The lightning performance of 1000kV UHV-AC transmission lines is an issue that must be considered in line design, especially the accurate calculation of the lightning shielding failure trip-out rate (SFTR) of 1000kV UHV-AC lines, which is essential for the scientific assessment of the lightning protection design schemes for 1000kV lines. In order to accurately evaluate and calculate the lightning performance of 1000kV UHV-AC transmission lines under different design schemes and conditions, this paper combines the discharge test data of the State Grid Corporation's UHV-AC test base for negative short-wave front operating impulse voltage under long gap (up to 10m) conditions, and proposes EGM striking distance calculation formulas and correction method for the geodesic striking distance factors applicable to 1000kV EHV large-size lines. And the simulation study of the back flashover and shielding failure performance under the typical design of 1000kV UHV-AC lines was carried out using the modified EGM and electromagnetic transient program (EMTP), respectively. The various sensitive influencing factors of the lightning trip-out rate (LTR) of 1000kV UHV-AC lines are analyzed, and the comprehensive lightning characteristics and engineering design suggestions of 1000kV UHV-AC transmission lines are proposed.
1000kV特高压交流输电线路的防雷性能是线路设计中必须考虑的问题,特别是1000kV特高压交流线路防雷屏蔽失效跳闸率(SFTR)的准确计算,对于科学评估1000kV线路防雷设计方案至关重要。为了准确评估和计算1000kV特高压交流输电线路在不同设计方案和条件下的防雷性能,本文结合国家电网公司特高压交流试验基地在长间隙(最大10m)条件下的负短波前工作冲击电压放电试验数据,提出了适用于1000kV超高压大线路测地击距因子的EGM击距计算公式及校正方法。采用改进的EGM和电磁暂态程序(EMTP)分别对典型设计下1000kV特高压-交流线路的反闪络和屏蔽失效性能进行了仿真研究。分析了1000kV特高压-交流输电线路雷电跳闸率(LTR)的各种敏感影响因素,提出了1000kV特高压-交流输电线路雷电综合特性及工程设计建议。
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引用次数: 0
Research on Application of DC Microgrid Heavy Truck Battery Charging-Replacement Station 直流微电网重型载重汽车电池充换站应用研究
Pub Date : 2022-04-01 DOI: 10.1109/ACPEE53904.2022.9783673
Zaibao Xiong, Leilei Li, Di Xu, Guang Su, Huaguang Wang, Yanning Li
The power grid in the new power system will present a grid pattern in which large power grids, highly autonomous local power grids and Micro grids coexist. If the DC power generation unit or load is connected to a DC micro grid with a suitable voltage level, part of the AC/DC conversion device will be omitted, the loss and the cost will be reduced after being scaled up. With the rapid growth of DC load and the large-scale development of DC characteristic power sources such as wind and solar storage, DC Micro grid will greatly increase and become an important part of the construction of a new power system with new energy as the main body. This paper analyzes the load of heavy trucks in green mines, selects main equipment and control and protection schemes, and builds a DC micro-grid solution based on the characteristics of the new power system. This scheme has a certain demonstration significance for the promotion and application of DC micro-grid in green mines.
新型电力系统中的电网将呈现大电网、高度自治的局部电网和微电网并存的电网格局。如果将直流发电机组或负载接入合适电压水平的直流微电网,可以省去部分交直流转换装置,放大后可以降低损耗和成本。随着直流负荷的快速增长和风能、太阳能储能等直流特征电源的大规模发展,直流微电网将大幅增加,成为以新能源为主体的新型电力系统建设的重要组成部分。本文对绿色矿山重型卡车的负荷进行了分析,选择了主要设备和控制保护方案,并根据新型电力系统的特点构建了直流微电网解决方案。该方案对直流微电网在绿色矿山的推广应用具有一定的示范意义。
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引用次数: 0
Detection Method of Distribution Transformer Capacity Increase based on Neural Network and Short Circuit Impedance 基于神经网络和短路阻抗的配电变压器容量增加检测方法
Pub Date : 2022-04-01 DOI: 10.1109/ACPEE53904.2022.9784012
Bin Zhang, Xiaoming Zhou, Heyang Sun, Chen Wang, Lixing Jiang, Jingjing Li
This paper proposes an online identification method of transformer capacity increase based on neural network combined with short-circuit impedance method to address the problems of distribution transformer capacity increase done by customers and discrepancy between nameplate capacity and actual capacity in the operation of distribution transformers for large customers. Using the actual data from the electric energy information acquisition system, a recurrent neural network algorithm is built and simulated. In the same time, a short-circuit impedance based model is set and tested using S9 series 10kV class distribution transformers. The experimental results show that the algorithm as well as the model can accurately indicate the status of the distribution transformer, which verifies the accuracy and the effectiveness of this method.
针对大客户配电变压器运行中客户自行增加配电变压器容量以及铭牌容量与实际容量不一致的问题,提出了一种基于神经网络结合短路阻抗法的变压器增加容量在线识别方法。利用电能信息采集系统的实际数据,建立了递归神经网络算法并进行了仿真。同时,利用S9系列10kV级配电变压器建立了基于短路阻抗的模型并进行了试验。实验结果表明,该算法和模型都能准确地指示配电变压器的状态,验证了该方法的准确性和有效性。
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引用次数: 0
Simpson’s Rule Differential Protection for New Energy Power Plant Outgoing Line 新能源电厂出线线路的辛普森规则差动保护
Pub Date : 2022-04-01 DOI: 10.1109/ACPEE53904.2022.9783850
Bing Luo, Wei Chen, Shilong Li, F. Xiao, Dan Liu, Y. Cao, Minghao Wen
New energy power supplies are connected to the grid through converters, and the fault features of short-circuit currents include small current amplitudes, power frequency variations, and phase limitations, which may reduce sensitivity of traditional differential protection, and even cause uncorrected operation. This phenomenon is particularly prominent in new energy power plants outgoing lines. Therefore, this article firstly discussed the fault feature of new energy sources. Then a theory of current differential protection based on Simpson’s Rule integration is put forward, which can reliably identify the internal or external faults. Finally, build the relevant simulation model to prove the performance of Simpson’s Rule differential protection scheme for new energy power plant outgoing line. The simulation results have suggested that the protection scheme fully satisfies the demands of safe operation of energy power plant.
新能源电源通过变流器接入电网,短路电流的故障特征包括电流幅值小、工频变化、限相等,这可能会降低传统差动保护的灵敏度,甚至造成误操作。这一现象在新能源电厂出线线路中尤为突出。因此,本文首先探讨了新能源的故障特征。在此基础上,提出了一种基于辛普森规则积分的电流差动保护理论,该理论能够可靠地识别内部或外部故障。最后,建立了相应的仿真模型,验证了新能源电厂出线辛普森规则差动保护方案的性能。仿真结果表明,该保护方案完全满足电厂安全运行的要求。
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引用次数: 0
Study on Operation Strategy of PV-Battery System Providing Frequency Regulation Based on Chance Constraint 基于机会约束的频率调节pv -电池系统运行策略研究
Pub Date : 2022-04-01 DOI: 10.1109/ACPEE53904.2022.9784081
Xiao-ling Yuan, Chenghui Qian, Yi Guo
This paper proposes an optimal operation strategy for a system composed of Battery Energy Storage Systems(BESSs) and Photovoltaic system(PV). The integrated system is defined as deliver the photovoltaic power and to simultaneously provide frequency regulation ancillary service(FRAS) to the main grid. This paper describes frequency regulation ancillary service market rules for PV-BESS and proposes a prediction method of the frequency regulation capacity of PV-BESS participating in FRAS based on chance constraint. Then, optimal operation strategy of PV-BESS system is calculated considering the frequency regulation performance and economy index as multi-objective optimization objectives, The proposed strategy can decrease the uncertainty risk of PV-BESS participating in the energy market and FRAS market, and improve the economic benefits and FR performance.
本文提出了由电池储能系统(BESSs)和光伏系统(PV)组成的系统的最优运行策略。集成系统的定义是在向主电网提供光伏发电的同时,提供频率调节辅助服务(FRAS)。本文描述了PV-BESS的频率调节辅助业务市场规律,提出了一种基于机会约束的PV-BESS参与FRAS的频率调节能力预测方法。然后,以频率调节性能和经济性指标为多目标优化目标,计算PV-BESS系统的最优运行策略,该策略可以降低PV-BESS参与能源市场和FRAS市场的不确定性风险,提高经济效益和FR性能。
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引用次数: 1
Research on key technologies for the construction of power trading market based on blockchain 基于区块链的电力交易市场建设关键技术研究
Pub Date : 2022-04-01 DOI: 10.1109/ACPEE53904.2022.9783688
Bin Ji, Zhengwei Jiang, Ziqiang Zhou, Li Chang, Ying Yao
In order to improve the flexibility of power regulation and give full play to the effectiveness of the power market, blockchain technology is used to deepen the development of the power spot market and improve the power market’s balance adjustment of power supply and demand. Starting from the blockchain technology, this article introduces the data storage method, analysis and the power market fit, and proposes the spot blockchain architecture of the "master-slave-side" chain for the power spot market and the functions it should have. Secondly, for the combination of the power spot market and blockchain technology, there should be active data protection, active verification, and dynamic data interactive verification technologies in business and systems. Finally, the article analyzes and summarizes the three key technologies of the article, which provides a reference for the application of blockchain technology for the development of the spot market.
为了提高电力调控的灵活性,充分发挥电力市场的有效性,利用区块链技术深化电力现货市场的发展,提高电力市场对电力供需的平衡调节。本文从区块链技术出发,介绍了数据存储方法、分析和电力市场适配,提出了电力现货市场“主从端”链的现货区块链架构及其应具备的功能。其次,对于电力现货市场与区块链技术的结合,在业务和系统上应该有主动数据保护、主动验证和动态数据交互验证技术。最后,文章对文章的三个关键技术进行了分析和总结,为区块链技术的应用为现货市场的发展提供参考。
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引用次数: 0
期刊
2022 7th Asia Conference on Power and Electrical Engineering (ACPEE)
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