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Measurement of He2* density with an auxiliary measuring electrode in atmospheric pressure plasma jet

Plasma Science and Technology 2019年第8期21卷 51-56页

作者： Bing QI Chunxu QIN Haikun SHANG Li XIONG Key Laboratory of Modern Power System Simulation and Control&Renewable Energy Technology Ministry of EducationNortheast Electric Power UniversityJilin132012People’s Republic of China College of Biomedical Engineering Jilin Medical UniversityJilin132013People’s Republic of China

In this study, the density of metastable He2* in an atmospheric-pressure plasma jet operating in helium with 0.001% nitrogen has been measured using an auxiliary measuring electrode *** the glow discharge mode, waveforms from two grounding electrodes, including one main discharge electrode and one auxiliary electrode, are *** isolated current peak formed by Penning ionization in waveforms from the auxiliary measuring electrode is identified to calculate the density of metastable He2*.In our discharge environment, the helium metastable densities along the jet axis direction are between 2.26×1013 and 1.74×1013 cm-3,which is in good agreement with the results measured by other *** measurement technique can be conveniently applied to the diagnosis of metastable He2* in an atmospheric-pressure plasma jet array.

关键词： atmospheric plasma jet dielectric barrier discharge density of metastable helium

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Equivalence of stability criteria for time-delay systems

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Frontiers of Electrical and Electronic Engineering in China 2010年第2期5卷 207-217页

作者： Haiyun AN Hongjie JIA Yuan ZENG Wei WEI Key Laboratory of Power System Simulation and Control of Ministry of Education Tianjin UniversityTianjin 300072China

During the past few decades,there have been a number of new delay-dependent stability criteria based on linear matrix inequalities published in the *** criteria,to some extent,can reduce the *** fact,some criteria are *** this paper,we aim to theoretically establish equivalence of two stability *** was obtained by Sun et al.[Sun et ***:Proceedings of IEEE power&Energy Society General Meeting.2009,1–7]and the other was given by Xu et al.[Xu et *** Transactions on Automatic control,2005,50(3):384–387].Also,we theoretically establish equivalence of the robust stability criterion presented by Jia et al.[Jia et *** of Electric power systems,2010,34(3):6–11]and the one given by Xu et al.(2005).

关键词： delay-dependent stability criterion robust stability time-delay systems linear matrix inequality(LMI)

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FAULT DIAGNOSIS METHOD FOR DC DISTRIBUTION NETWORKS BASED ON SEMITENSOR PRODUCT BAYESIAN NETWORKS 6

FAULT DIAGNOSIS METHOD FOR DC DISTRIBUTION NETWORKS BASED ON...

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6th International Scientific and Technical Conference Relay Protection and Automation, RPA 2023

作者： Wang, He Li, Shiqiang Yu, Huanan Bian, Jing Wei, Bo Key Laboratory of Modern Power System Simulation and Control and Renewable Energy Technology Ministry of Education Northeast Electric Power University Jilin132012 China

ISBN: (纸本)9798350382334

关键词： Bayesian networks

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Short-Term Load Forecasting of Smart Grid Based on Load Spatial-Temporal Distribution

Short-Term Load Forecasting of Smart Grid Based on Load Spat...

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2019 IEEE PES Innovative Smart Grid Technologies Asia, ISGT 2019

作者： Yan, Gangui Han, Tianyi Zhang, Wei Zhao, Shujian Key Laboratory of Modern Power System Simulation and Control and Renewable Energy Technology Ministry of Education Northeast Electric Power University Ji Lin China

ISBN: (纸本)9781728135205

Various incentives in the smart grid, which force power consumer to take respond demand and change the characteristics of load, will affect power load forecasting. In this paper, it is concluded that the load spatial-temporal distribution and the load are relevant in the smart grid, and the impact of load spatial-temporal distribution is considered in forecasting model. It sifted multivariate load series highly relevant to prediction point with correlation analysis, and modeled the load series from the viewpoint of time with long short-term memory (LSTM). By comparing with the artificial neural network and support vector machine, it is verified that the model proposed has higher accuracy. © 2019 IEEE.

关键词： Long short-term memory

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power grid frequency regulation participated by photovoltaic generation to adapt to different control modes of grid-side AGC 8

Power grid frequency regulation participated by photovoltaic...

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8th Renewable power Generation Conference, RPG 2019

作者： Yan, Gangui Hu, Wenbo Jia, Qi Wang, Dan Zhou, Guoqing Key Laboratory of Modern Power System Simulation and Control and Renewable Energy Technology Ministry of Education Northeast Electric Power University Jilin132012 China

ISBN: (纸本)9781839531255

Large-scale grid-connection of photovoltaic (PV) generation causes the power system to face the problem of insufficient inertia and insufficient frequency modulation capability. One of the important means to solve this problem is to take part in grid frequency regulation actively. On the basis of spare certain active power, this paper puts forward the active power-frequency droop control strategy. By modifying the original control structure of the inverter, PV generation actively takes part in the grid frequency primary regulation. In order to achieve non-error adjustment of frequency, this paper further proposes a secondary frequency regulation control strategy that adapts to different grid-side AGC control modes (constant frequency control mode, constant tie line power control mode and tie line power frequency deviation control mode). The effectiveness and feasibility of the control strategies are verified based on the PSCAD/EMTDC simulation platform. © 2019 Institution of Engineering and Technology. All rights reserved.

关键词： Frequency modulation

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Chaos Analysis of Discharge Current Based on Tracking Test of Phenolic Resin

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Transactions of Tianjin University 2009年第1期15卷 1-6页

作者：杜伯学郑晓磊董典帅 Key Laboratory of Power System Simulation and Control of Ministry of Education Tianjin University Henan Electric Power Survey and Design Institute State Grid Jiangsu Wuxi Power Supply Company

In tracking test, discharge is a complicated process and comparative tracking index (CTI) has wide varia-tion. To evaluate tracking resistance, the chaos analysis of discharge current is presented based on the tracking test of phenolic resin in accordance with IEC60112. According to the characteristics of statistical self-similarity and complexity of discharge current, the largest Lyapunov exponent is calculated, and the 2-dimensional attractor of discharge current is reconstructed. Moreover, the attractors of discharge current and recurrence plots of different discharge states are reconstructed. The results indicate that the chaos attractors have different characteristics in evo-lutionary tracks, the topological structure and grain direction of recurrence plots show significant differences. The chaos attractor can describe the tracking process, the recurrence plot can identify the tracking state clearly, while its arithmetic is simple.

关键词： phenolic resin tracking failure chaos theory chaos attractor recurrence plot

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A novel frequency regulation control strategy based on the external characteristics of PV generation 8

A novel frequency regulation control strategy based on the e...

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8th Renewable power Generation Conference, RPG 2019

作者： Yan, Gangui Wang, Dan Jia, Qi Hu, Wenbo Zhou, Guoqing Key Laboratory of Modern Power System Simulation and Control and Renewable Energy Technology Ministry of Education Northeast Electric Power University Jilin132012 China

ISBN: (纸本)9781839531255

Large-scale grid-connected PV generation results in the power system facing with the problem of reduced inertia and inadequate frequency regulation capability, which is urgent for PV generation to take participate in frequency regulation. In this paper, the research object is the double-stage PV generation, a novel frequency regulation control strategy based on the external characteristics of PV generation is proposed. f-UPV compensation is introduced into DC low-voltage control loop, which makes the DC low-voltage vary with the grid frequency, thus controlling the output power of PV generation. The influence mechanism of the control strategy on the frequency dynamic process of power system is also analysed based on the frequency response model (SFR). The results show that: the larger the ΔUPV generated by the f-UPV compensation unit, the more power of PV generation can be generated;the control strategy essentially affects the damping coefficient of the system, which not only affects the transient process of the system frequency, but also the steady-state frequency deviation. © 2019 Institution of Engineering and Technology. All rights reserved.

关键词： Frequency response

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power system Transient Stability Assessment Method Based on CapsNet

Power System Transient Stability Assessment Method Based on ...

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2019 IEEE PES Innovative Smart Grid Technologies Asia, ISGT 2019

作者： Tian, Xu An, Jun Mu, Gang Department of Electrical Engineering Key Laboratory of Modern Power System Simulation and Control Renewable Energy Technology Ministry of Education Jilin China

ISBN: (纸本)9781728135205

This paper addresses the need to make judgments quickly and accurately after a transient stability failure in the power system. A method for transient stability assessment of power systems based on CapsNet is proposed. This method does not require manual calculation and is based directly on simulation data. Using the self-learning ability of the CapsNet and strong feature extraction ability, the offline training model is used to find the mapping relationship between the input data set and the transient stability, and then online evaluation. This paper effectively improves the accuracy of the evaluation by constructing the input data matrix;By improving the parameters in the network, the calculation speed is effectively improved, and the robustness and generalization ability of the model are enhanced. The idea of "fast measurement, fast resolution, fast control" has been achieved. The simulation results of IEEE-39 node system verify the effectiveness of the proposed method, and the proposed method is superior to the evaluation model of other machine learning methods. © 2019 IEEE.

关键词： Feature extraction

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Ladder Time Stepwise Inertia Coordinated control Method of Multiple Wind Farms to Suppress system Frequency Secondary Drop

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Energy Engineering 2024年第8期121卷 2293-2311页

作者： He Li Xianchao Liu Jidong Li Yuchen Qiu Tongliao PowerSupply Company State Grid East Inner Mongolia Electric Power CompanyTongliao028000China Key Laboratory of Modern Power System Simulation and Control&Renewable Energy Technology Northeast Electric Power UniversityJilin132012China

Currently,both regulated and deregulated power trading exist in China’s power system,which has caused imbalanced funds in the electricity *** this paper,a simulation analysis of the electricity market with wind energy resources is conducted,and the calculation methods of unbalanced funds are investigated *** detail,the calculation formulas of unbalanced funds are illustrated based on their definition,and a two-track electricity market clearing model is ***,the concept of the dual-track system is explained,and the specific calculation formulas of various types of unbalanced funds are ***,considering the renewable energy consumption,the market clearing model based on DC power flow is constructed and solved;by combining fitting methods of mid-and long-term curves,the unbalanced funds are calculated based on clearing results and formulas.

关键词： Wind power stepwise inertial frequency control secondary drop

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Dynamic economic evaluation of hundred megawatt-scale electrochemical energy storage for auxiliary peak shaving

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Protection and control of modern power systems 2023年第3期8卷 252-269页

作者： Junhui Li Gang Mu Jiahui Zhang Cuiping Li Gangui Yan Haotian Zhang Guohang Chen Key Laboratory of Modern Power System Simulation and Control and Renewable Energy Technology Ministry of Education(Northeast Electric Power University)Jilin 132012China State Grid Zhejiang Pinghu City Electric Power Supply Company.LTD. Pinghu 314200Zhejiang ProvinceChina.

With the rapid development of wind power,the pressure on peak regulation of the power grid is ***-chemical energy storage is used on a large scale because of its high efficiency and good peak shaving and valley fill-ing *** economic benefit evaluation of participating in power system auxiliary services has become the focus of attention since the development of grid-connected hundred megawatt-scale electrochemical energy storage systems(ESS).Based on the relationship between power and capacity in the process of peak shaving and valley filling,a dynamic economic benefit evaluation model of peak shaving assisted by hundred megawatt-scale electrochemi-cal ESS considering the equivalent life of the battery is *** model considers the investment cost of energy storage,power efficiency,and operation and maintenance costs,and analyzes the dynamic economic benefits of dif-ferent energy storage technologies participating in the whole life cycle of the power ***,according to the cur-rent ESS market environment,the auxiliary service compensation price,peak-valley price difference and energy stor-age cost unit price required to make the energy storage technology achieve the balance of payments are calculated,and the economic balance points of different energy storage types are ***,based on the measured data of different provincial power grids,the economies of six energy storage types applied to three provincial power grids are compared and analyzed,and the rationality and effectiveness of the relevant models proposed are *** work has theoretical guiding significance for the economic benefit evaluation of hundred megawatt-scale electro-chemical energy *** 1 A proportional relationship between grid filling power and capacity demand is *** is used to determine the energy storage configuration for auxiliary peak shaving.2 A dynamic economic evaluation model considering energy storage investment and mai

关键词： auxiliary valley electrochemical

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