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

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Influence of Inrush Current on Second Harmonic Characteristics of Direct-driven Wind Turbine 冲击电流对直驱风力机二次谐波特性的影响
Pub Date : 2023-03-23 DOI: 10.1109/AEEES56888.2023.10114308
Xu Jia, Z. Xiang, Peipeng Zhou
In the large-scale PMSG delivery system, when the adjacent transformer is closed to the Wind power generator grid bus without load, the excitation inrush current may cause the Wind power generator output current to distort, and in serious cases, cause the Wind power generator off-grid accident. Taking the no-load closing of adjacent transformers as the scene, this paper introduces the structure and control strategy of the PMSG grid-connected system, proposes the suppression method of the nth harmonic current of the Wind power generator output current three-phase n (n=2,3,⋯⋯, the same below) frequency doubling rotation dq feedback, establishes the model of the nth harmonic current suppression loop to suppress the nth harmonic current caused by the excitation inrush current. Finally, the correctness of the proposed suppression measures is verified by PSCAD/EMTDC simulation platform.
在大型PMSG输电系统中,当相邻变压器与风电机组空载并网母线闭合时,励磁涌流可能造成风电机组输出电流畸变,严重时可能造成风电机组离网事故。以相邻变压器空载合闸为场景,介绍了PMSG并网系统的结构及控制策略,提出了风电机组输出电流三相n (n=2,3,⋯⋯,下同)倍频旋转dq反馈的n次谐波电流抑制方法,建立了n次谐波电流抑制回路模型,以抑制励磁涌流引起的n次谐波电流。最后,通过PSCAD/EMTDC仿真平台验证了所提抑制措施的正确性。
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引用次数: 0
Research on Simulation of Temperature Rise of GIS Bus Based on Thermal Network Method 基于热网络方法的GIS总线温升仿真研究
Pub Date : 2023-03-23 DOI: 10.1109/AEEES56888.2023.10114144
Yapei Liu, Hao Zhang, Jianying Zhong, Yongqi Yao, Zhijun Wang, Lina Li
Based on the thermoelectric analogy theory and the principle of heat transfer, a GIS coaxial bus thermal network simulation model is established by comprehensively considering the skin effect, resistance temperature coefficient, heat conduction, heat convection and heat radiation. The temperature rise of the bus conductor and the shell under different inflation pressures was obtained by calculation, which took about 5s. The real prototype was built and the temperature rise test was carried out. The comparison results between simulation and test show that the conductor error is 3.36% and the shell error is 6.85% under the inflation pressure of 0.43Mpa. At 0.5Mpa, the conductor error is 2.60% and the shell error is 7.18%. The rationality of the method and the accuracy of the results are proved.
基于热电类比理论和传热原理,综合考虑集肤效应、电阻温度系数、热传导、热对流和热辐射等因素,建立了GIS同轴母线热网仿真模型。通过计算得到了不同充气压力下母线导体和外壳的温升,耗时约为5s。制作了实物样机,并进行了温升试验。仿真与试验结果对比表明,在0.43Mpa充气压力下,导体误差为3.36%,壳体误差为6.85%。在0.5Mpa时,导体误差为2.60%,外壳误差为7.18%。验证了该方法的合理性和计算结果的准确性。
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引用次数: 0
Renewable Energy Technology Status and Standard Development Trend in Developing Countries 发展中国家可再生能源技术现状及标准发展趋势
Pub Date : 2023-03-23 DOI: 10.1109/AEEES56888.2023.10114354
Zhao Xiaoming, Z. Cai, Cao Lan, Huang Yuanping, Zhang Pengyue, Zhao Liming
Electric power energy is related to the lifeblood of the national economy and social livelihood, and standardization is an important support of the electric power industry, a regulation and management method, which not only plays a basic role in standardizing the development of the electric power industry, ensuring the safe and economic operation of the power grid, improving the management level of enterprises, promoting the reform of the electric power system, etc. Moreover, it plays a leading role in promoting technological progress, promoting international exchanges and realizing the strategic goal of double carbon. The international development of technical standards in the power industry has become a trend. This paper makes an in-depth analysis of the development of renewable energy technology and the fields covered by IEC/TC 8 International Standardization Technical Committee, and puts forward relevant suggestions for the development of international standards, so as to promote the renewable energy power grid technology to occupy a commanding position in the international stage.
电力能源关系到国民经济和社会民生的命脉,标准化是电力行业的重要支撑,是一种规范和管理的手段,不仅对规范电力行业发展、保障电网安全经济运行、提高企业管理水平、推动电力体制改革等方面起着基础性作用。在推动技术进步、促进国际交流、实现双碳战略目标等方面发挥着引领作用。电力行业技术标准的国际发展已成为一种趋势。本文对可再生能源技术的发展及IEC/TC 8国际标准化技术委员会涵盖的领域进行了深入分析,并对国际标准的制定提出了相关建议,以促进可再生能源电网技术在国际舞台上占据制高点。
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引用次数: 0
Research on 1100kV GIS Bus Thermal Network Model with Spring Contacts 带弹簧触点的1100kV GIS母线热网模型研究
Pub Date : 2023-03-23 DOI: 10.1109/AEEES56888.2023.10114330
Yapei Liu, Yongqi Yao, Jianying Zhong, Zhijun Wang, Hao Zhang, Miaoxin Li
Based on the principle of thermoelectric analogy, the thermal network topology of the coaxial bus of the Gas Insulated equipment (GIS) and the GIS bus with multiple spring contacts was established, and the thermal network simulation model of the 1100kV GIS bus was further established. The temperature appreciation of each detection position under the test condition was obtained by calculation, and the calculation time was about 10s. The real prototype was built and the temperature rise test was carried out. The simulation and test results show that the maximum relative error of spring contact temperature rise is 2.70%, that of conductor temperature rise is 7.58%, and that of shell temperature rise is 3.80%, which proves the rationality of the method and the accuracy of the results.
基于热电类比原理,建立了气体绝缘设备(GIS)同轴母线和多弹簧触点GIS母线的热网拓扑,并进一步建立了1100kV GIS母线的热网仿真模型。通过计算得到试验条件下各检测位置的温升,计算时间约为10s。制作了实物样机,并进行了温升试验。仿真和试验结果表明,弹簧接触温升的最大相对误差为2.70%,导体温升的最大相对误差为7.58%,外壳温升的最大相对误差为3.80%,证明了该方法的合理性和结果的准确性。
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引用次数: 0
Partition and Block Algorithm for Active Distribution Network Reliability Evaluation with a Soft Open Point 带软开点的配电网主动可靠性评估的分块算法
Pub Date : 2023-03-23 DOI: 10.1109/AEEES56888.2023.10114172
Xiao Chen, Yuduo Zhao, W. Xiong, Xufeng Yuan, Xiaosong Zou
With the application of Soft Open Point (SOP) in all aspects of distribution system, the operation mode of traditional distribution network is changed into flexible loop operation, which not only improves the reliability of system operation, but also makes the reliability evaluation more complex. Therefore, how to give consideration to the speed and accuracy, and at the same time, how to evaluate its reliability becomes particularly important. In this paper, the topology of the flexible interconnected distribution network is analyzed, and the concept of partition and block is proposed. The flexible interconnected distribution network is divided into three areas: DC, AC and SOP. On the basis of the partition, Dijkstra algorithm is used to search the shortest circuit to form the block, and the block information of each area is determined. Then sequential Monte Carlo simulation method is adopted for AC region according to the different characteristics of each region. Fault tree analysis method is adopted for the block of micro grid and SOP in DC region. Then the load outage range is determined by searching the position of non-zero element in the line corresponding to the fault block in the block join matrix so as to obtain the load point and the reliability index of the system. Finally, the applicability, accuracy and efficiency of the proposed method are verified through algorithm analysis and reliability comparison analysis in the case of IEEE-33 node in multiple scenarios.
随着软开点(SOP)在配电网各个环节的应用,将传统配电网的运行方式转变为柔性回路运行,不仅提高了系统运行的可靠性,也使可靠性评估变得更加复杂。因此,如何在兼顾速度和准确性的同时,对其可靠性进行评估就显得尤为重要。本文分析了柔性互联配电网的拓扑结构,提出了分区和块的概念。柔性互联配电网分为直流、交流和SOP三个区域。在划分的基础上,利用Dijkstra算法搜索最短的电路形成块,确定每个区域的块信息。然后根据各区域的不同特性,对交流区域采用时序蒙特卡罗模拟方法。采用故障树分析法对直流区域的微网阻塞和SOP进行分析。然后通过在块联接矩阵中搜索故障块对应的线路中非零元素的位置来确定负荷中断范围,从而得到系统的负荷点和可靠性指标。最后,以IEEE-33节点为例,通过算法分析和可靠性对比分析,验证了所提方法在多场景下的适用性、准确性和效率。
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引用次数: 0
Simulation Analysis of Temperature Rise of 10kV Atmospheric Pressure Sealed Air Insulated Switch Cabinet 10kV常压密封空气绝缘开关柜温升仿真分析
Pub Date : 2023-03-23 DOI: 10.1109/AEEES56888.2023.10114120
Hengzheng Li, Zilan He, Sixiang Chen, Guowei Guo, Jing Huang, G. Sun, Jianmao Chen, Xiyao Min
In this paper, a simulation model was established for the 10kV atmospheric pressure sealed air insulated switch cabinet in COMSOL. The multi-physical field simulation of electrothermal coupling was carried out by finite element analysis method, and the internal temperature rise of the switch cabinet was obtained. Firstly, the internal temperature distribution rule of switch cabinet during static state operation is studied, and it is concluded that the highest temperature rise inside switch cabinet is located at the circuit breaker contacts, and the temperature decreases gradually from the circuit breaker contacts to both ends with the conductor rod of circuit breaker. Then the internal temperature distribution of the switchgear under short-circuit condition is studied. It is concluded that the temperature of the breaker contacts increases rapidly with the increase of short circuit time, and the temperature may lead to the damage of the contacts due to excessive temperature. The research results of this paper can provide some reference for temperature rise monitoring, fault diagnosis and maintenance scheme design of the switchgear.
本文对COMSOL公司10kV常压密封空气绝缘开关柜建立了仿真模型。采用有限元分析方法对电热耦合进行了多物理场模拟,得到了开关柜内部温升。首先,对开关柜静态运行时内部温度分布规律进行了研究,得出开关柜内部温升最高的位置在断路器触点处,从断路器触点到断路器导体杆两端温度逐渐降低的结论。然后研究了短路工况下开关柜的内部温度分布。得出断路器触点温度随短路时间的增加而迅速升高,温度过高可能导致触点损坏。本文的研究成果可为开关柜的温升监测、故障诊断和维护方案设计提供一定的参考。
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引用次数: 0
Research on Control Strategy Taking into Account Operational Economy of Enengy Storage System Participating Secondary Frequency Regulation of Power Grid 考虑运行经济性的储能系统参与电网二次调频控制策略研究
Pub Date : 2023-03-23 DOI: 10.1109/AEEES56888.2023.10114265
Qingquan Lv, Zhenzhen Zhang, Pengfei Gao, Dingmei Wang, Yanqi Zhang, Xiangyu Zheng
At present, with the high proportion of new energy and power electronic equipment connected to the power grid, battery energy storage system (BESS) has been widely concerned as a new frequency regulation mean. Aiming at the characteristics of high energy storage capacity and power demand on the power generation side, a distributed coordinated control strategy of multiple distributed energy storage joint participation in automatic generation control (AGC) of the power grid considering the system operation economy is proposed. Firstly, the AGC dynamic model of regional power grid with distributed energy storage is established; On this basis, the operating cost model of energy storage participating in the secondary frequency regulation of the power grid is constructed; Finally, with the goal of minimizing the operating cost of energy storage frequency regulation, distributed consistency algorithm is used to coordinate the control of distributed energy storage, so as to realize the refined management of their respective output power. The simulation results show that the control strategy can give full play to the technical characteristics of different distributed energy storage, while ensuring the frequency stability of the power grid, avoiding the excessive loss of electricity in the energy storage system and realizing economic operation.
当前,随着新能源和电力电子设备并网比例的提高,电池储能系统(BESS)作为一种新的频率调节手段受到了广泛关注。针对发电侧储能容量大、用电需求大的特点,提出了考虑系统运行经济性的多个分布式储能联合参与电网自动发电控制(AGC)的分布式协调控制策略。首先,建立了具有分布式储能的区域电网AGC动态模型;在此基础上,构建了储能参与电网二次调频的运行成本模型;最后,以储能调频运行成本最小为目标,采用分布式一致性算法对分布式储能进行协调控制,实现各自输出功率的精细化管理。仿真结果表明,该控制策略能够在保证电网频率稳定的同时,充分发挥不同分布式储能的技术特点,避免储能系统的电能过度损耗,实现经济运行。
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引用次数: 0
Optimal Scheduling of Multi-energy Nexus and Conversion in District Integrated Energy System with Uncertain Wind Power 风电不确定区域综合能源系统中多能连接与转换的优化调度
Pub Date : 2023-03-23 DOI: 10.1109/AEEES56888.2023.10114355
Jun Wang, Junjie Bai, Keran Huang, X. Xu, Lan Wu, Xianbo Wang
The target of zero carbon society has a profound impact on economic transformation and energy structure adjustment. This paper proposes multi-energy nexus including electricity, gas, heat, and hydrogen in a district-integrated energy system (DIES), which detailedly refines the power-to-gas process via hydrogen energy utilization. Wind scenarios are generated and reduced with Latin hypercube sampling techniques. The minimal daily operating cost of DIES includes wind spillage cost and energy purchase cost, which is formulated as a mixed-integer linear programming problem. Simulation results under three different strategies have verified the rationality and feasibility of the proposed model.
零碳社会目标对经济转型和能源结构调整有着深远的影响。本文提出在区域一体化能源系统(DIES)中实现电、气、热、氢的多能联结,并通过利用氢能细化电制气过程。用拉丁超立方体采样技术生成和约简风场景。直接发电系统的最小日运行成本包括风溢成本和购能成本,可表示为一个混合整数线性规划问题。三种不同策略下的仿真结果验证了所提模型的合理性和可行性。
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引用次数: 0
New Energy Access Potential Evaluation in Station Areas Based on Deep Neural Network 基于深度神经网络的站区新能源接入潜力评价
Pub Date : 2023-03-23 DOI: 10.1109/AEEES56888.2023.10114182
Zhongdong Wang, Yu Zhou, Yue Li, Fan Gao, Shanshan Meng, Xiaolin Xu
With the proposal of "carbon peaking and carbon neutrality" goals, the permeability of new energy in the station area is gradually improved. The volatility and randomness of its output greatly challenge the stable operation of the new station area. At present, as the photovoltaic and other new energy access consistently increases, the station area flow direction presents two-way random characteristics and the power converse problem becomes increasingly prominent, which has impeded further access of new energy, had a negative effect on the energy control and electricity safety system of the station area and even the superior distribution network, and affected the normal company marketing, business expansion, etc. In view of the above problems, this paper puts forward a station area new energy access potential assessment method based on deep neural network. Based on station area multi-section historical measurement data, using deep learning method the potential connection between the current station area state and accessible photovoltaic capacity is learned and the data-driven station area new energy access potential assessment model is obtained. This method considers the actual constraints of the station area’s complex environment and analyzes the bottleneck of new energy access, so as to optimize the resource allocation and maximize the new energy access potential in the station area. It is verified by example that this method realizes the accurate and real-time maximum new energy access potential assessment in low-voltage station areas.
随着“碳调峰、碳中和”目标的提出,站区新能源渗透率逐步提高。其输出的波动性和随机性极大地挑战了新站区的稳定运行。目前,随着光伏等新能源接入量的不断增加,站区流向呈现双向随机特征,功率逆向问题日益突出,阻碍了新能源的进一步接入,对站区乃至上级配电网的能源控制和用电安全系统产生了负面影响,影响了公司正常的营销、业务拓展等。针对上述问题,本文提出了一种基于深度神经网络的站区新能源接入潜力评价方法。基于站区多段历史测量数据,采用深度学习方法学习当前站区状态与光伏可达容量之间的电位联系,得到数据驱动的站区新能源可达电位评价模型。该方法考虑了站区复杂环境的实际约束,分析了新能源接入的瓶颈,从而优化资源配置,最大化站区新能源接入潜力。通过实例验证,该方法实现了低压站区最大新能源接入潜力的准确实时评估。
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引用次数: 0
A Coal Blending Optimization Model for Minimizing the Cost of Coal-Fired Power Enterprises 煤电企业成本最小化配煤优化模型
Pub Date : 2023-03-23 DOI: 10.1109/AEEES56888.2023.10114239
L. Yao, Zhi Zhang, Li Guan, Le Fang
High coal prices encourage coal-fired power enterprises to purchase lignite and low-quality bituminous coal with low price, high sulfur and ash content, resulting in serious deviation from the design value of the boiler, thus reducing the generation capacity of units and increasing the blocked capacity. In this paper, we propose a coal blending optimization model for minimizing cost of coal-fired power enterprises. Based on the prediction of coal price, this model minimizes the total cost including purchase cost and additional cost related to coal quality with meeting operational requirement of boilers. The numerical results verify the efficiency of the proposed model.
高煤价促使燃煤发电企业采购价格低廉、含硫量高、灰分高的褐煤和劣质烟煤,导致锅炉严重偏离设计值,从而降低机组发电量,增加堵容量。本文提出了一个煤电企业成本最小化配煤优化模型。该模型基于对煤价的预测,在满足锅炉运行要求的前提下,使包括采购成本和与煤质相关的额外成本在内的总成本最小。数值结果验证了该模型的有效性。
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引用次数: 0
期刊
2023 5th Asia Energy and Electrical Engineering Symposium (AEEES)
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