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2022 4th International Conference on Power and Energy Technology (ICPET)最新文献

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A Multilevel Asymmetric Current Source Inverter Topology Using Switched Inductor 一种基于开关电感的多电平非对称电流源逆变器拓扑
Pub Date : 2022-07-28 DOI: 10.1109/ICPET55165.2022.9918295
Lin Cheng, Ping Chen, Anna Yang, Qian Zhang, Liyong Wang, Zifeng Qian, Minghui Zhang, Zhang Tao
Multilevel current source inverter has attracted extensive attention because of its high security and low output di/dt. In order to generate more levels with fewer devices, reduce the circuit cost and simplify control method, a new multilevel asymmetric current source inverter topology with switched inductor is proposed. In this paper, the inverter topology, working principle, modulation strategy and inductor current control method are described. Finally, the correctness of the theoretical analysis is verified by computer simulation.
多电平电流源逆变器以其高安全性和低输出di/dt而受到广泛关注。为了用更少的器件产生更多的电平,降低电路成本,简化控制方法,提出了一种带开关电感的多电平非对称电流源逆变器拓扑结构。本文介绍了逆变器的拓扑结构、工作原理、调制策略和电感电流控制方法。最后,通过计算机仿真验证了理论分析的正确性。
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引用次数: 1
A Phased Calculation Method of Switching Loss of SiC MOSFET Based on High Power Conditions 基于大功率条件下SiC MOSFET开关损耗的相位计算方法
Pub Date : 2022-07-28 DOI: 10.1109/ICPET55165.2022.9918410
Zhi Zheng, Yijun Wang, Feng Wang, F. Zhuo
As an emerging wide-bandgap semiconductor device, SiC MOSFET provides the advantages of high frequency, high efficiency and high power density for power electronic devices due to its excellent performance. As an important factor to study the switching performance of devices, switching loss is of great significance to its accurate calculation. This paper firstly analyzes the turn-on and turn-off processes of SiC MOSFETs, subdivides them into ten stages, and obtains the calculation method of switching losses in each stage. Then the corresponding switching loss value is obtained through simulation and experiment. Finally, the loss value calculated by the proposed calculation method is compared with the simulation and experiment, which verifies the high accuracy of the loss calculation method.
SiC MOSFET作为一种新兴的宽带隙半导体器件,以其优异的性能为电力电子器件提供了高频、高效率和高功率密度的优势。开关损耗作为研究器件开关性能的重要因素,其精确计算具有重要意义。本文首先分析了SiC mosfet的导通和关断过程,并将其细分为10级,得到了每级开关损耗的计算方法。然后通过仿真和实验得到相应的开关损耗值。最后,将所提出的计算方法计算出的损耗值与仿真和实验结果进行了比较,验证了损耗计算方法的准确性。
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引用次数: 0
Identification Method of Main Electrical Connection and Attribute of Bay 海湾主电气连接及属性识别方法
Pub Date : 2022-07-28 DOI: 10.1109/ICPET55165.2022.9918311
Zhang Dongying, T. Yichun, Cui Duo, Liang Tianjun, Yang Kai, Song Kunhao
In order to realize the verification of the anti-misoperation rules of the electrical switch, it is necessary to automatically divide bays and identify the attributes of bay and the type of main electrical connection in the power grid or substation model data. With the goal of identifying the main electrical connection, the article formulated the classification principle of switch bays. According to the principle, the circuit breakers and isolating switches are classified into circuit breaker bays or isolating switch bays. Based on a clear data base and functional requirements, the paper summarized the characteristics of switch bay in each electrical connection. Considering that a voltage level contains a variety of main electrical connections or incomplete main electrical connections, the article proposed the corresponding identification method of main electrical connection and the attributes of bay. On this basis, the overall analysis process is designed. Through the case data test, the effectiveness of the above method is verified.
为了实现电气开关防误操作规则的验证,需要在电网或变电站模型数据中自动划分分仓,识别分仓属性和主电气连接类型。本文以确定主要电气连接为目标,制定了开关座的分类原则。按原理将断路器和隔离开关分为断路器座或隔离开关座。在明确数据基础和功能需求的基础上,总结了各电气连接中开关柜的特点。考虑到一个电压等级包含多种主电气连接或不完整的主电气连接,本文提出了相应的主电气连接和隔层属性的识别方法。在此基础上,设计了整体分析流程。通过案例数据测试,验证了上述方法的有效性。
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引用次数: 0
Speed Sensorless Control of Permanent Magnet Synchronous Motor Based on Improved Sliding Mode Adaptive Observer 基于改进滑模自适应观测器的永磁同步电机无速度传感器控制
Pub Date : 2022-07-28 DOI: 10.1109/ICPET55165.2022.9918471
Du Xia, Qinfeng Hu
Permanent magnet synchronous motor (PMSM) requires the speed and position information for motor speed and torque controls. However, applying the sensors has many problems such as sensor mounting space and additional cost, etc. Therefore, in this paper, sensorless control method based on model reference adaptive system (MRAS) is proposed to eliminate the sensors. The method is constructed in two models which are a reference block as standard model and an adaptive block as the state observer model. Finally, an improved Sliding Mode Adaptive Law (SMAL) is proposed to estimate and reflect the error variables of the two models. The proposed control scheme is verified by the simulation.
永磁同步电机(PMSM)需要速度和位置信息进行电机速度和转矩控制。然而,该传感器的应用存在许多问题,如传感器安装空间和额外成本等。因此,本文提出了基于模型参考自适应系统(MRAS)的无传感器控制方法来消除传感器。该方法采用参考块作为标准模型和自适应块作为状态观测器模型两种模型构建。最后,提出了一种改进的滑模自适应律(SMAL)来估计和反映两种模型的误差变量。仿真验证了所提控制方案的有效性。
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引用次数: 1
Thermal Management Design for Prefabricated Cabined Energy Storage Systems Based on Liquid Cooling 基于液冷的预制组合式储能系统热管理设计
Pub Date : 2022-07-28 DOI: 10.1109/ICPET55165.2022.9918385
Xinghua Huang, Han Wu, Yuanliang Fan, Weiming Chen, Zewen Li
With the energy density increase of energy storage systems (ESSs), air cooling, as a traditional cooling method, limps along due to low efficiency in heat dissipation and inability in maintaining cell temperature consistency. Liquid cooling is coming downstage. The prefabricated cabined ESS discussed in this paper is the first in China that uses liquid cooling technique. This paper explores its thermal management design. The layout of liquid cooling piping is studied. The specifications of cooling piping, cooling units and dehumidifying air conditioners are discussed. The thermal management strategy is analyzed. Besides, important design steps are simulated. On-site operation data show that the thermal management system automatically regulates temperature according to the predetermined strategy. Cell temperature is modulated to the bound 15°C-30°C and the maximum cell temperature disparity is 3℃. Techno-economic comparison shows that the designed thermal management system consumes 45% less electricity and enhances 43% more energy density than air cooling. This paper aims to provide reference for thermal management design of future ESSs.
随着储能系统能量密度的提高,传统的风冷方式由于散热效率低、无法保持电池温度的一致性而步履蹒跚。液体冷却正在逐渐淡出人们的视线。本文所讨论的预制组合式ESS在国内尚属首次采用液冷技术。本文探讨了其热管理设计。对液冷管路布置进行了研究。对冷却管道、冷却机组和除湿空调的规格进行了讨论。分析了热管理策略。并对重要的设计步骤进行了仿真。现场运行数据表明,热管理系统根据预定策略自动调节温度。电池温度被调制到15°C-30°C之间,最大电池温差为3℃。技术经济对比表明,与风冷相比,设计的热管理系统耗电量减少45%,能量密度提高43%。本文旨在为未来的ess热管理设计提供参考。
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引用次数: 0
Optimal Scheduling of Integrated Energy Network with Electricity-Hydrogen-Storage Considering Ladder Carbon Trading Mechanism 考虑阶梯碳交易机制的电储一体化能源网络优化调度
Pub Date : 2022-07-28 DOI: 10.1109/ICPET55165.2022.9918319
Bowen Cao, Jiawei Li, Shuai Wang, Runhao Gao, Xiao-ling Su, Yang Si
The integrated energy network (IEN) is one of the important forms of future energy system development. Low-carbon emission and economic operation are main aims for IEN. In order to improve consumption capacity of new energy sources, and improve its economy and environmental friendliness, this paper proposes an optimal scheduling method for electricity-hydrogen-storage integrated energy network (EHS-IEN) considering the carbon trading mechanism and dynamic weights and constructs a multi-objective optimal scheduling model to minimize operating costs and carbon emissions. The feasibility of the model is verified by the comparative analysis of the operating cost and environmental cost before and after the system optimization, and the influence of the carbon trading mechanism and different types of weights on the optimal scheduling of the EHS-IEN is analyzed. The simulation example analysis shows that the optimal dispatching model for EHS-IEN reduces carbon emissions and operation cost.
综合能源网络是未来能源系统发展的重要形式之一。低碳排放和经济运行是IEN的主要目标。为了提高新能源的消纳能力,提高其经济性和环境友好性,本文提出了考虑碳交易机制和动态权重的电储氢一体化能源网络(EHS-IEN)优化调度方法,构建了以运行成本和碳排放最小为目标的多目标优化调度模型。通过对系统优化前后运行成本和环境成本的对比分析,验证了模型的可行性,并分析了碳交易机制和不同类型权值对EHS-IEN最优调度的影响。仿真算例分析表明,该优化调度模型降低了EHS-IEN的碳排放和运行成本。
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引用次数: 0
Research on Influence of Humidity on Total Electric Field of Unipolar HVDC Line 湿度对单极直流线路总电场影响的研究
Pub Date : 2022-07-28 DOI: 10.1109/ICPET55165.2022.9918473
Xiaoqian Ma, Jun Lu, Xianxin Li, Jingbo Li
It is of great significance to study the influence of humidity on total electric field of HVDC transmission lines to realize the differentiated design of transmission lines. In this paper, an outdoor experimental platform is built to study the effects of humidity on ground total electric field under unipolar negative HVDC lines in natural environment. The results show that in natural environment, with the increase of relative humidity, the ground total electric field under negative line increases at first, but when the humidity reaches a certain level, the increase trend of ground total electric field obviously slows down, and the electric field begins to decrease at high humidity. According to the analysis, the increase of relative humidity in natural environment is accompanied by the decrease of temperature, which is the main reason for this experimental phenomenon, that is, the decrease of temperature weakens the increasing trend of total electric field caused by the increase of humidity. The research conclusion can provide reference for transmission line design in different areas.
研究湿度对高压直流输电线路总电场的影响,对实现输电线路的差异化设计具有重要意义。本文搭建室外实验平台,研究自然环境下湿度对单极负直流线路接地总电场的影响。结果表明:在自然环境中,随着相对湿度的增大,负线下地面总电场先增大,但当湿度达到一定水平后,地面总电场增大趋势明显减缓,高湿时电场开始减小。根据分析,自然环境中相对湿度的增加伴随着温度的降低,这是产生这一实验现象的主要原因,即温度的降低削弱了湿度增加引起的总电场的增加趋势。研究结论可为不同地区的输电线路设计提供参考。
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引用次数: 0
Maximal Renewable Power Penetration Computation with Augmented Lagrangian Alternative Direction Inexact Newton Method 增广拉格朗日替代方向非精确牛顿法的最大可再生电力渗透计算
Pub Date : 2022-07-28 DOI: 10.1109/ICPET55165.2022.9918223
Yunkai Lei, Xiong Yang, Donglai Xiao, Jinchuan Han
Global warming and environmental pollution concerns have promoted dramatic penetration of renewable energy sources all over the world. The problem of estimating the maximal power penetration of renewable energy can be formulated as an optimal power flow problem. In this paper, we apply augmented Lagrangian alternating direction inexact Newton (ALADIN) method to solve this optimization problem. The ALADIN method uses inexact Hessians which can reduce the communication compared with alternating direction of multipliers method (ADMM). The numerical studies on 30 bus system indicating that the ALADIN method is much faster than the ADMM and can reduce the number of iterations by about one order of magnitude.
全球变暖和对环境污染的担忧促使可再生能源在世界各地急剧渗透。估计可再生能源的最大功率渗透问题可表述为最优潮流问题。本文采用增广拉格朗日交替方向不精确牛顿(ALADIN)方法求解这一优化问题。ALADIN方法使用了不精确的Hessians,与交替方向乘法相比较,减少了通信。在30总线系统上的数值研究表明,ALADIN方法比ADMM方法速度快得多,迭代次数减少约一个数量级。
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引用次数: 0
Scenario Probabilistic Load Flow based on FCM and Copula Method and its Application in Reactive Power Optimization 基于FCM和Copula方法的情景概率潮流及其在无功优化中的应用
Pub Date : 2022-07-28 DOI: 10.1109/ICPET55165.2022.9918517
Qiang Chen, Wenbin Hao, Peng Zeng
To accurately describe the complex and variable dependence between the power output of wind farms and photovoltaics, a scenario probabilistic load flow calculation method based on Fuzzy C Means clustering (FCM) and copula function method is proposed in this paper. The output data is divided into several scenarios based on the FCM method with optimal parameters determined by the Density-Based Index (DBI). Then, the optimal copula type and parameters of every scenario are determined. Finally, the data simulation of every scenario is respectively conducted. Through the progress of detailed treatment, the precise probabilistic load flow can be improved. Taking the measured output of wind farms and photovoltaic power plants in America as examples, some simulations are conducted in the IEEE 30 node system. The simulation results validate the effectiveness and practical application value of the new scenario probabilistic load flow model.
为了准确描述风电场输出功率与光伏发电之间的复杂和可变依赖关系,提出了一种基于模糊C均值聚类(FCM)和耦合函数方法的情景概率潮流计算方法。基于FCM方法将输出数据划分为多个场景,并由基于密度的指数(DBI)确定最优参数。然后,确定了每个场景的最优联结类型和参数。最后,分别对各个场景进行了数据仿真。通过细化处理的进展,可以提高精确的概率潮流。以美国风电场和光伏电站实测输出为例,在IEEE 30节点系统中进行了仿真。仿真结果验证了新情景概率潮流模型的有效性和实际应用价值。
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引用次数: 0
Impacts of Generation Biddings on Power System Operations: A Scenario-Based Analysis 发电竞价对电力系统运行的影响:基于场景的分析
Pub Date : 2022-07-28 DOI: 10.1109/ICPET55165.2022.9918201
Xingyun Yan, Zhi Cai, Yueshuang Bao, Ying Wang, Shuangshuang Hou, Kaifeng Zhang, Kun Yuan
With the development of renewable generation and revolution of the electric power market, generation companies are allowed to bid strategically. The bidding behaviors of the market participants will have significant impacts on the market clearing process, and further influence the unit commitment, power dispatch, power flow, and market prices. It is necessary to study the bidding behaviors impacts on power system operation, especially to answer the question that how much differences of the power system operation will be caused by the bidding behaviors of different generation units. This paper proposes a scenario-based analysis method of the bidding behaviors impacts on the power system operation. It first establishes a scenario generation method of the blocked price-quantity bidding curves, and then proposes a series of indexes to analyze the results.
随着可再生能源发电的发展和电力市场的变革,发电企业可以进行战略性投标。市场参与者的竞价行为会对市场出清过程产生显著影响,进而影响机组承诺、电力调度、潮流和市场价格。有必要研究竞价行为对电力系统运行的影响,特别是回答不同发电机组的竞价行为对电力系统运行造成多大差异的问题。本文提出了一种基于场景的竞价行为对电力系统运行影响分析方法。首先建立了阻塞价格-数量竞价曲线的情景生成方法,然后提出了一系列指标对结果进行分析。
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引用次数: 0
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2022 4th International Conference on Power and Energy Technology (ICPET)
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