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Adaptive PID control for Hydraulic Turbine Regulation Systems Based on INGWO and BPNN

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Protection and control of Modern Power Systems 2024年第4期9卷 126-146页

作者： Jinbao Chen Gang He Yunhe Wang Yang Zheng Zhihuai Xiao the China Yangtze River Electric Power co. Ltd.Wuhan 430000China the School of Power and Mechanical Engineering Wuhan UniversityWuhan 430072China the hebei fengning pumped storage co. Ltd.Chengde 050300China

To ensure system stability,the fixed-PID(F-PID)controller with small parameters is usually adopted in hydropower *** involves a slow setting speed and it is difficult to realize optimal control for full working *** address the problem,this paper designs a variable-PID(V-PID)controller for a hydraulic turbine regulation system(HTRS)based on the improved grey wolf optimizer(INGWO)and back propagation neural networks(BPNN).These can achieve excellent regulation under full working ***,the nonlinear HTRS model containing the nonlinear hydroturbine model is constructed and the stable domain is obtained using Hopf bifurcation theory to determine the available range of PID *** optimal PID parameters in typical working conditions are then calculated by the INGWO,and the optimal PID parameters are generalized through training the V-PID neural networks which take the optimal PID parameters as sample *** V-PID neural networks with different structures are compared to determine the optimal structure of the variable-PID controller *** V-PID controller-based nonlinear HTRS model shows that the PID parameters can be automatically adjusted online according to the working condition changes,realizing optimal control of hydropower units in full working conditions.

关键词： Hydraulic turbine regulation system back propagation neural networks Hopf bifurcation grey wolf optimizer variable-PID controller

Large eddy simulation of cavitating flows with dynamic adaptive mesh refinement using OpenFOAM

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Journal of Hydrodynamics 2020年第2期32卷 398-409页

作者： Lin-min Li Dai-qing Hu Yu-cheng Liu Bi-tao Wang Chen Shi Jun-jie Shi Chang Xu college of energy and Electrical Engineering Hohai UniversityNanjing211100China college of Water conservancy and Hydropower Engineering Hohai UniversityNanjing210098China Anhui Jinzhai pumped storage Power co. LtdLu’an237300China

Cavitating flows are dominated by large gradients of physical properties and quantities containing complicated interfacial structures and lots of multi-scale eddies that need to be accurately characterized using a high-resolution *** present work,within OpenFOAM,proposes an effective modeling framework using the large eddy simulation(LES)approach along with the volume of fluid(VOF)method to simulate the two-phase flow system and applies the Schnerr-Sauer model to calculate the mass-transfer rate between water and *** adaptive mesh refinement(AMR)which is a powerful tool for allocating high-resolution grids only to the region of the greatest concern is adopted for improving the solution of interfacial *** effect of grid size is firstly investigated and the time-averaged quantities are verified against the experimental data,and then simulations of cavitating flows are successfully achieved to precisely characterize the features of cavitation with automatically and dynamically refining the *** the refinement only takes place in the interfacial region,high-precision simulations can be achieved with limited computational resources,and the method shows promising prospects for modeling of the multi-scale,time-critical and computationally intensive cavitating flows.

关键词： Cavitating flows large eddy simulation(LES) multi-scale adaptive mesh refinement(AMR) OpenFOAM

conductivity characteristics of landslide considering porosity,saturation,temperature and ion concentration

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Journal of Mountain Science 2023年第8期20卷 2133-2148页

作者： XIONG Bo-bo YANG Shi-jie ZHAO Bing-qin LU Xiao-chun TIAN Bin LI Cheng WU Xuan-xuan TU Xiao-long college of Hydraulic and Environmental Engineering China Three Gorges UniversityYichang 443000China college of Civil Engineering and Architecture China Three Gorges UniversityYichang 443000China Hubei energy Group Luotian Pingtanyuan pumped storage co. Ltd.Huanggang 438000China

High-density resistivity imaging method is widely used in landslide *** resistivity of rock and soil is closely related to factors,such as porosity,moisture content,saturation and *** this study,the resistivity test was designed to investigate the influence of physical factors and pore solution components on the resistivity of landslide *** and analytical results find that both moisture content and volumetric water content varies greatly under the same *** different temperatures,soil resistivity exhibits great *** the same temperature,the ion concentration and species in pore solutions have great influence on soil *** on the test results and grey correlation analysis,this study established a resistivity model by considering porosity,saturation,temperature and ion *** study lays a foundation for the high-density resistivity method to measure the moisture content of landslides.

关键词： Landslide monitoring High-density resistivity method Pore fluid composition Resistivity model

Online Intrusion Detection Mechanism Based on Model Migration in Intelligent pumped storage Power Stations

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China communications 2023年第4期20卷 368-381页

作者： Yue Zong Yuanlin Luo Yuechao Wu Jiande Huang Bowen Yang Xiaoyu Kang Shumei Liu Yao Yu Power China Huadong Engineering corporation Limited Hangzhou 311122China East China Tongbai pumped storage Power Generation co. LtdTaizhou 317200China School of computer Science and Engineering Northeastern UniversityShenyang 110169China

With the continuous integration of new energy into the power grid,various new attacks continue to emerge and the feature distributions are constantly changing during the deployment of intelligent pumped storage power *** intrusion detection model trained on the old data is hard to effectively identify new attacks,and it is difficult to update the intrusion detection model in time when lacking *** solve this issue,by using model-based transfer learning methods,in this paper we propose a convolutional neural network(CNN)based transfer online sequential extreme learning machine(TOS-ELM)scheme to enable the online intrusion detection,which is called CNN-TOSELM in this *** our proposed scheme,we use pre-trained CNN to extract the characteristics of the target domain data as input,and then build online learning classifier TOS-ELM to transfer the parameter of the ELM classifier of the source *** results show the proposed CNNTOSELM scheme can achieve better detection performance and extremely short model update time for intelligent pumped storage power stations.

关键词： transfer learning intrusion detection online classification

Value Evaluation Method for pumped storage in the New Power System

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Chinese Journal of Electrical Engineering 2023年第3期9卷 26-38页

作者： Yumin Peng Ying Yang Man Chen Xuelin Wang Yijun Xiong Mu Wang Yikai Li Bushi Zhao CSG PGC Power storage Research Institute Guangzhou 510635China Sichuan energy Internet Research Institute Tsinghua UniversityChengdu 610213China

When integrating the generation of large-scale renewable energy,such as wind and solar energy,the supply and demand sides of the new power system will exhibit high *** storage power stations can improve flexible resource supply regulation in the power system,which is the key support and important guarantee for building low-carbon,safe,and efficient new power *** by the current operation mode and electricity price mechanism,the pumped storage power station cost cannot be effectively recovered,and the value cannot be reasonably compensated,resulting in difficult return on investment,single investment subjects,and notable industry development *** to the operational requirements of the new power system,combined with the various functions of pumped storage power stations,the value of pumped storage power stations in the new power system was *** on the equivalent value substitution principle and system operation simulation,a pumped storage value evaluation method for the new power system was *** new power system operation was simulated considering the dispatching model of wind and photovoltaic power abandonment *** the same dispatching objectives,the output of various power sources and power generation operating costs with and without pumped storage power stations in the system were *** economic,safety,social,and environmental benefit perspectives,a quantitative model of the pumped storage power station value was established,covering seven dimensions:asset investment savings,power generation operating cost reduction,flexible adjustment capability improvement,system resilience enhancement,power outage loss reduction,renewable energy consumption,and emission reduction *** on the new power system operation and planning data for southern China,the value of typical pumped storage power stations was analyzed,and the results showed that with new power system’s construction and dev

关键词： pumped storage new power system evaluation method value substitution operation simulation

Thermo-Economic Modeling and Evaluation of Physical energy storage in Power System

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Journal of Thermal Science 2021年第6期30卷 1861-1874页

作者： HU Shan LIU Chang DING Jie XU Yujie CHEN Haisheng ZHOU Xuezhi Institute of Engineering Thermophysics Chinese Academy of ScienceBeijing 100190China University of Chinese Academy of Sciences Beijing 100049China National energy Large Scale Physical energy storage Technologies R&D Center Bijie 551712China

In order to assess the electrical energy storage technologies,the thermo-economy for both capacity-type and power-type energy storage are comprehensively investigated with consideration of political,environmental and social *** for the first time,the Exergy Economy Benefit Ratio(EEBR)is proposed with thermo-economic model and applied to three different storage systems in various scenarios,including pumped storage,compressed air energy storage and flywheel energy *** impact of the total system efficiency,annual utilization hour,life time,and other key factors are also *** results show that the EEBRs of pumped storage and compressed air energy storage under peak load shaving condition and flywheel energy storage under frequency modulation service condition are all larger than zero,which means they are all thermo-economically *** extra consideration of political,environmental and social impact,the exergy cost could reduce by about 25%and the EEBR *** sensitivity analysis indicates the similarity and diversity of influence to EEBR between capacity-type and power-type energy storage *** former is that energy efficiency is the dominated factor for all three storage *** latter is that the difference of exergy benefit mode causes variety in other major *** energy-type storage system,like pumped storage and compressed air storage,the peak-to-valley price ratio is very sensitive in energy *** power-type storage system,like flywheel storage,the mileage ratio is in leading position in auxiliary service benefit by *** the three cases studied,the pumped storage has the best thermo-economy;the compressed air energy storage is the second,and the flywheel energy storage is the *** main reason is that the pumped storage has the least non-exergy cost,and flywheel has the most.

关键词： physical energy storage system thermo-economy exergy economy benefit ratio capacity-type energy storage power-type energy storage

Attenuation of Chlorinated contamination in Three Different Depths of Aquifers at Remediation Site

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China Petroleum Processing & Petrochemical Technology 2023年第1期25卷 162-178页

作者： Sun Shaodong Li Weisi Huang Yongjun Jiang Qing Bai Yu Wang Kunhua Xue Jianliang Wang Bo Yan Dongdong Xu conghai college of Safety and Environmental Engineering Shandong University of Science and TechnologyQingdaoShandong 266590China Department of Polymer Science and Engineering University of Science and Technology of ChinaHefei 230026China Shandong Provincial Eco-environment Monitoring Center Jinan 250102China Linyi Junhe Environmental Protection Technology co. LtdLinyi Shandong 276000 Unicom Digital Technology co. Ltd. college of energy storage Technology Shandong University of Science and TechnologyQingdaoShandong 266590China Shandong Juncheng Environment Examination co. LtdLinyi Shandong 276000China

The cleanup of carbon tetrachloride(CCl4)in groundwater is challenging due to its high volatility and tendency to form a dense nonaqueous liquid *** the engineering applications perspective,the pump-and-treat(PAT)technology has substantial advantages owing to its large-scale implementation ability to solve groundwater ***,few studies focused on the variation in chloride contaminants in remediation sites after the contaminated groundwater was pumped and ***,we monitored the changes in chlorinated contamination in groundwater from 12 aquifers at the field level for 6 *** that the natural attenuation of chlorinated contamination is inseparable from the action of microorganisms,the major environmental factors influencing biodegradation were also evaluated.A redundancy analysis(RDA)showed that inorganic salts(DS,DN,and DF)were the most important factor(>60%)affecting the concentration of chloride contaminants,including the negative correlation between DN and the degradation of contaminants in shallow *** deep aquifers,DS,DF,and pH explained most of the degradation of chloride *** bedrock layers,DCl was positively relevant to the chloride contaminants in wells PTJ2 and *** addition,EC and DS accounted for 73.2%and 92.4%of the contaminant’s variance in wells PTJ4 and PTJ8,***,the concentrations of the corresponding contaminations and physicochemical variation in three different depths of aquifers were compared;the shallower aquifers showed a higher *** in situ monitoring and analysis of contaminated groundwater in remediation sites under PAT will promote practical wastewater treatment technologies in engineering applications.

关键词： groundwater chloride contaminants pump-and-treat biodegradation engineering application

Special Issue on energy storage

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Journal of Thermal Science 2020年第2期29卷 279-279页

作者： DING Yulong CHEN Haisheng LING Haoshu Birmingham Centre for energy storage University of Birmingham UK Institute of Engineering Thermophysics Chinese Academy of SciencesChina

This special issue of Journal of Thermal Science concerns with energy *** specific focus is on thermal and mechanical energy storage,aligning well to the scope of this *** and mechanical energy storage currently accounts for over 60%of global non-pumped-Hydro *** have been playing important roles in our energy systems and will play an increasing role while the world moves towards a low(and even net-zero)carbon future.

关键词： storage energy installation

Reliability Analysis of a Switched Reluctance Starter/Generator

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Protection and control of Modern Power Systems 2024年第1期9卷 112-121页

作者： Hao Chen Fan Yang Lijun Xu Qiwei Lu Xiqiang Chang Xing Wang Lijiang Dong Yi Wen Jiang Chen Gang Miao Jianmin Hu Guanjun Wang Wei Li Xiaohua Bao School of Electrical Engineering China University of Mining and TechnologyXuzhou 221116China Xinjiang Institute of Engineering Urumqi 830000China International Joint Research Center of Central and Eastern European countries on New energy Electric Vehicle Technology and Equipment Xuzhou 221008China International cooperation Joint Laboratory of New energy Power Generation and Electric Vehicles of Jiangsu Province colleges and Universities Xuzhou 221008China School of Information and Electrical Engineering China University of Mining and TechnologyXuzhouChina China University of Mining and Technology(Beijing) BeijingChina State Grid Xingjiang Electric Power co. Ltd.UrumqiXinjiangChina China University of Mining and Technology XuzhouChina State Grid Xinjiang company Limited Electric Power Research Institute UrumqiXinjiangChina Xinjiang Fukang pumped storage Power company Limited UrumqiXinjiangChina State Grid Urumqi Electric Power Supply company UrumqiXinjiangChina Wuxi Inspection and Testing Certification Research Institute WuxiJiangsuChina Anhui Wannan Electric Machine co. Ltd.WannanAnhuiChina Hefei University of Technology in Electrical and Automation Engineering

In this paper,the combined k-out-of-n:G model and reliability block diagram model is used to analyze the reliability of a switched reluctance starter/generator ***,the different operational modes of a switched reluctance motor starter/generator are analyzed,and the fault states of the system are briefly *** the fault criteria of the system in different operational states are put ***,a relia-bility block diagram model is established to calculate the system-level reliability,and the k-out-of-n:G model is adopted to analyze the reliability of each part of the switched reluctance starter/generator *** verify effectiveness,the first-order Markov model is also used to analyze the reliability of each part of the switched reluc-tance starter/generator *** the compu-tational complexity and accuracy of the system,the k-out-of-n:G model is more suitable for system component level reliability ***,a 6/4 switched reluctance motor is used as the simulated and experimental platform *** final results verify the effectiveness of the reliability analysis model.

关键词： system switched generator