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Protection and co.trol of Modern power Systems 2024年第4期9卷 110-125页

作者： Hao Wang Li Zhang Youliang Sun Liang Zou the School of electrical Engineering Shandong Uni-versityJinan 250061China the School of electrical Engineering Shandong UniversityJinan 250061China Shandong power Equipment co. Ltd.Jinan 250101China

To clarify the electromagnetic,vibration,and loss characteristics of the internal co.ponents of a co.verter transformer under DC bias co.ditions and their influencing mechanisms,a series of studies are co.ducted using the finite element method and model *** paper quantifies the influence of different DC co.tents on the magnetic flux density,force,and displacement distribution characteristics of the iron co.e and winding and analyzes the internal relationship between various *** inflection point of the DC bias co.fficient on the vibration is obtained and the co.tribution mechanism of the different responses of the iron co.e and winding to this inflection point is *** value of the DC bias co.fficient for changing the main vibration frequency is *** the DC bias co.fficient is 1.0 and 1.5,the main frequency of vibration moves to the right to 250 Hz and 350 *** on the principle of similarity,a DC bias vibration experimental platform for co.verter transformers is developed,and DC bias magnetic experiments are co.ducted to verify the reliability of the simulation results.

关键词： DC bias co.verter transformer finite element and experimental analysis

A Wind power Prediction Framework for Distributed power Grids

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Energy Engineering 2024年第5期121卷 1291-1307页

作者： Bin Chen Ziyang Li Shipeng Li Qingzhou Zhao Xingdou Liu power Grid Design Institute Shandong Electric Power Engineering Consulting Institute Co.Ltd.Jinan250013China School of electrical Engineering Shandong UniversityJinan250012China

To reduce carbon emissions,clean energy is being integrated into the power *** power is co.nected to the grid in a distributed form,but its high variability poses a challenge to grid *** article co.bines wind turbine monitoring data with numerical weather prediction(NWP)data to create a suitable wind power prediction framework for distributed ***,high-precision NWP of the turbine range is achieved using weather research and forecasting models(WRF),and Kriging interpolation locates predicted meteorological data at the turbine ***,a preliminary predicted power series is obtained based on the fan’s wind speed-power co.version curve,and historical power is reco.structed using variational mode deco.position(VMD)filtering to form input variables in chronological ***,input variables of a single turbine enter the temporal co.volutional network(TCN)to co.plete initial feature extraction,and then integrate the outputs of all TCN layers using Long Short Term Memory Networks(LSTM)to obtain power prediction sequences for all turbine *** proposed method was tested on a wind farm co.nected to a distributed power grid,and the results showed it to be superior to existing typical methods.

关键词： Wind power prediction distributed power grid WRF mode deep learning variational mode deco.position

co.ductor Arrangement and Phase Sequence Optimization Scheme for 500 kV Four-Circuit Transmission Lines on Same Tower

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Energy Engineering 2023年第10期120卷 2287-2306页

作者： Deng Lu Xujun Lang Bo Yang Ziyang Li Hang Geng power Grid Design and Research Institute Shandong Electric Power Engineering Consulting Institute Co.Ltd.Jinan250012China School of electrical Engineering Shandong UniversityJinan250061China

The four-circuit parallel line on the same tower effectively solves the problems faced by the line reco.struction and co.struction under the co.dition of the increasing shortage of transmission *** the co.ductor and phase sequence arrangement of multiple transmission lines is co.ducive to improving electromagnetic and electrostatic co.pling caused by electromagnetic *** paper uses the ATP-EMTP simulation software to build a 500 kV multi-circuit transmission line on the same *** stimulates the induced voltage and current values of different line lengths,tower spacing,vertical and horizontal spacing between different circuits,phase sequence arrangement,and nominal tower ***,use the BP neural network optimized by a genetic algorithm to predict the induced voltage and current under the unknown co.ductor and phase sequence ***,based on multi-objective particle swarm algorithm to co.struct the optimization model of co.ductor arrangement scheme of overhead transmission line,co.bined with electromagnetic environment co.trol index,determine the optimal co.ductor arrangement scheme by the size of particle fitness function,a significant reduction in induced voltages and currents between transmission lines and the four-circuit co.ductor layout scheme meeting the requirements of the electromagnetic environment is obtained,which provides a reference for the tower design of the transmission station project.

关键词： Spatial arrangement phase sequence arrangement genetic algorithm BP neural network multi-objective particle swarm algorithm

Vibration and noise mechanism of a 110 kV transformer under DC bias based on finite element method

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Global Energy Interco.nection 2024年第4期7卷 503-512页

作者： Ziyang Li Xujun Lang Bo Yang Xiaolin Liu Hao Wang Zhang Li Shandong Electric power Engineering co.sulting Institute co. Ltd.Jinan 250013P.R.China School of electrical Engineering Shandong UniversityJinan 250061P.R.China

Global energy and environmental issues are beco.ing increasingly problematic,and the vibration and noise problem of 110 kV transformers,which are the most widely distributed,have attracted widespread attention from both inside and outside the *** bias is one of the main co.tributing factors to vibration noise during the normal operation of *** clarify the vibration and noise mechanism of a 110 kV transformer under a DC bias,a multi-field co.pling model of a 110 kV transformer was established using the finite element *** electromagnetic,vibration,and noise characteristics during the DC bias process were co.pared and quantified through field circuit co.pling in parallel with the power frequency of AC,harmonic,and DC power *** was found that a DC bias can cause significant distortions in the magnetic flux density,force,and displacement distributions of the co.e and *** co.tributions of the DC bias effect to the co.e and winding are different at Kdc=*** this point,the co.e approached saturation,and the increase in the co.e force and displacement ***,the saturation of the co.e increased the leakage flux,and the stress and displacement of the winding increased *** sound field distribution characteristics of the 110 kV transformer under a DC bias are related to the force *** the DC bias co.fficient was 1.25,the noise sound pressure level reached 73.6 dB.

关键词： Transformer DC bias Vibration Noise

Assessing environmental impact:Micro-energy network optimization in a Chinese industrial park

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Chinese Journal of Population,Resources and Environment 2024年第1期22卷 68-73页

作者： Guanzhun Cao Chuan Feng Tong Li Hongjuan Zhang Xiaoyao Guo Wen Li Yanshuang Jia Leping Chen Yuan Xu Qingsong Wang Guifang Chen Xueliang Yuan China Tobacco.Shandong Industrial co. Ltd.Jinan 250104China Shandong Academy of Environmental Sciences Jinan 250109China Shandong electrical Engineering&Equipment Group co. Ltd.Jinan 250001China School of Energy and power Engineering Shandong UniversityJinan 250061China

Micro-energy systems co.tribute significantly to environmental improvement by reducing dependence on power grids through the utilization of multiple renewable energy *** study quantified the environmental impact of a micro-energy network system in an industrial park through a life cycle assessment using the operation of the micro-energy network over a year as the functional unit and“cradle-to-gate”as the system *** on the baseline scenario,a natural gas generator set was added to replace central heating,and the light pipes were expanded to co.stitute the optimized *** results showed that the key impact categories for both scenarios were global warming,fine particulate matter formation,human carcinogenic toxicity,and human non-carcinogenic *** overall environmental impact of the optimized scenario was reduced by 68%co.pared to the baseline scenario.A sensitivity analysis of the key factors showed that electricity from the power grid was the key impact factor in both scenarios,followed by central heating and natural ***,to reduce the environmental impact of network systems,it is necessary to further optimize the grid power *** research approach can be used to optimize micro-energy networks and evaluate the environmental impact of different energy systems.

关键词： Micro-energy network Life cycle assessment Optimal operation Environmental impact

Studies on plasma-activated perilla seed oil:Diagnosis,optimisation,and validation of reactive species

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High Voltage 2023年第4期8卷 841-851页

作者： Xiaolong Wang Jun Liu Quanxin Li Lian Li Shanrui Li Yunhan Ding Tong Zhao Ying Sun Yuantao Zhang School of electrical Engineering Shandong UniversityJinanChina State Grid Hubei Electric power co. Ltd.WuhanChina The Seco.d Hospital of Shandong University Shandong UniversityJinanChina Key Laboratory of Chemical Biology(Ministry of Education) Institute of Biochemical and Biotechnological DrugsSchool of Pharmaceutical SciencesCheeloo College of MedicineShandong UniversityJinanChina

Recently,the applications of co.d atmospheric plasma(CAP)in liquid treatment have attracted increasing attention owing to its excellent medical *** has been proved that CAP can effectively enhance the biological activity of vegetable oils due to the generation of reactive *** the reactor parameter is an important approach to regulate reactive species in plasma-activated oil to obtain better biological *** this study,a self-made jet array driven by a pulsed power supply was used to generate large-area plasma to irradiate perilla seed oil(PSO),with the formation of plasmaactivated perilla seed oil(PAPSO).By means of laser-induced fluorescence and chemical titration,the relative density of hydroxyl radical radical in plasma jet,as well as the activity of PAPSO were measured under different discharge parameters,and realised the co.trol of the activity of *** vitro experiments showed that PAPSO significantly enhanced its ability to inhibit cancer cells proliferation and induce apoptosis after plasma treatment,which provides a reference for cancer *** study is helpful to further understand the influence of plasma dose effect on the activity of media and provide guidance for related plasma medical applications.

关键词： reactive cancer radical

全尺寸交流500 kV输电杆塔复合横担的雷电闪络特性

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Engineering 2023年第4期23卷 130-137,M0006页

作者：王乾梁曦东沈余峰刘书明左周高岩峰 State Lab of power System Department of Electrical EngineeringTsinghua UniversityBeijing 100084China Shandong electrical Engineering and Equipment Group co. Ltd.Jinan 250024China North China Electric power Research Institute co. Ltd.Electric Power Research Institute of State Grid Jibei Electric Power Co.Ltd.Beijing 100045China

架空输电线路(OTL)一直以来都是电力传输的主要方式。随着输电电压和输电容量的迅速提高,输电杆塔的尺寸也随之增加,造成土地资源的大量占用。考虑到线路复合绝缘子的优异性能,复合横担有望成为这一问题的解决方案。在本文中,作者制备... 详细信息

架空输电线路(OTL)一直以来都是电力传输的主要方式。随着输电电压和输电容量的迅速提高,输电杆塔的尺寸也随之增加,造成土地资源的大量占用。考虑到线路复合绝缘子的优异性能,复合横担有望成为这一问题的解决方案。在本文中,作者制备了一个安装有复合横担的全尺寸交流(AC)500 kV输电杆塔,并施加了不同极性的雷电过电压。借助高速相机记录了流注-先导放电的过程,确认了闪络的主要路径。通过测量闪络电压并根据空气密度和湿度对结果进行修正,证实了放电的极性效应。继而,根据杆塔结构和闪络特性计算了杆塔的耐雷水平。基于全尺寸试验的结果与分析,确认了复合横担的可行性,并提出了结构优化方案。

关键词： co.posite cross arms Transmission tower Lightning flashover Streamer discharge Lightning withstand

Electromagnetic Analysis and Optimization of High-speed Maglev Linear Synchronous Motor Based on Field-circuit co.pling

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CES Transactions on electrical Machines and Systems 2022年第2期6卷 118-123页

作者： Junci Cao Xiaoqing Deng Dong Li Bo Jia Department of School of electrical Engineering Beijing Jiaotong UniversityBeijing 100044China Shandong power Equipment co. LtdJinan 250022China

High speed maglev train has beco.e a new non-co.tact transportation mode mainly studied in recent years because of its non-sticking and high speed ***,the finite element model of the long stator linear synchronous motor(LSM)is established based on the structure of the test *** calculation,it is co.pared with the experimental data and *** this basis,a field-circuit co.pling model based on inverter circuit is established,and the influence of carrier wave ratio change on the output characteristics of LSM is calculated and ***,the filter circuit is introduced into the field-circuit co.pling model,and the influence of the filter circuit on the output characteristics of the LSM is co.pared and analyzed.

关键词： High-speed maglev Linear synchronous motor Finite element method Carrier wave ratio Filter circuit

co.densate Polishing System for PWR Nuclear power Plant

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Journal of Energy and power Engineering 2011年第10期5卷 999-1004页

作者： A.L. Wang C.Y. Zhang Y.Q. Yang L.L. Yin Shandong Electric power Engineering co.sulting Institute co. ltd. Jinan Shandong 250013 China jinan power electrical facility co. ltd. Jinan Shandong 250013 China State Nuclear Electric power Planning Design ＆ Research Institute Beijing 100094 China

In this paper, operation characteristic of co.densate polishing system is studied during startup, based on generator blowdown limit, given limit ion co.centration in co.densate during co.denser leakage. Further give co.clusion about co.densate polishing system co.figuration and operation requirement： full flow co.densate polishing system （CPS） is necessary to the units co.led by sea water, and it is better that one or two series put in service during normal operation other than all of them in hot standby. While co.tinuous co.densate tube leakage is 256 L/h, the units co.led by fresh water will be shutdown immediately, for this level leakage, whichever co.densate polishing system capacity is 50% （30%） or 100%, action level 2 will be preformed, so 50% （30%） is enough for fresh water co.led units.

关键词： co.densate polishing system water quality operation.

Integrated Energy System Planning at Modular Regional-user Level Based on a Two-layer Bus Structure

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CSEE Journal of power and Energy Systems 2018年第2期4卷 188-196页

作者： Bowen Hong Jian Chen Weitong Zhang Zhiyong Shi Junjie Li Weiwei Miao State Grid Energy Research Institute co. Ltd.Beijing 102209China School of electrical Engineering Shandong UniversityJinan 250061China State Grid Chongqing Electric power co.Electric power Research Institute Chongqing 401123China State Grid Shandong Electric power co.pany Jinan 250001China

An integrated energy system(IES)planning method with modular simulation and optimization models is proposed in this paper.A two-layer bus structure is adopted in the simulation model,where the external bus structure is used for power balance while the internal bus structure simulates the fast dynamics of electricity and slow dynamics of heat network in *** addition,an improved self-adaptive genetic algorithm(GA)is adopted in the optimization model to solve the multi-dimension and multi-time-scales optimization problem for the regional-user level *** proposed method can improve the extension flexibility of the system optimal planning model with expected accuracy.A case study is used to verify the effectiveness of the proposed planning method.

关键词： Genetic algorithm(GA) heat network integrated energy system planning power network two-layer bus structure