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Evolutionary Game-theoretic Modeling of Massive Distributed Renewable Energy Deployment Towards Low-carbon Distribution Networks

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Journal of Modern power Systems and Clean Energy 2023年第5期11卷 1519-1528页

作者： Xuanyi Xiao Jianbing Yin Lin Chen Mingchang Wang Yi Zhao Zhiyi Li College of Electrical Engineering Zhejiang UniversityHangzhouChina State Grid Hangzhou power supply company HangzhouChina School of Electric power Shenyang Institute of EngineeringShenyangChina IEEE

This paper proposes an evolutionary game-theoretic model of massive distributed renewable energy deployment in order to shed light on the self-organization sustainable developments of renewable energies in distribution networks towards low-carbon targets. Since neighboring buses can interact in terms of energy exchanges, the return matrices of individual buses in the evolutionary game are established based on profiles of loads and renewable energy generation. More specifically, an evolutionary strategy is proposed based on the return matrices for individual buses to determine whether or not to deploy renewable energies in the next round of the game. Then, a dynamic model is derived for analyzing the renewable energy penetration rate in the distribution network throughout the multi-round evolutionary game. In theory, this model can reveal the self-organization process of renewable energy deployment in the distribution network. With this model, the distribution network operator would be aided in designing the incentives for buses deploying renewable energies toward a pre-defined low-carbon target. Numerical results on an actual 141-bus system and a synthetic 2000-bus system have demonstrated the validity and efficiency of the proposed model.

关键词： Distribution network renewable energy deployment self-organization evolutionary game

Control scheme of hexagonal modular multilevel direct converter for offshore wind power integration via fractional frequency transmission system

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Journal of Modern power Systems and Clean Energy 2018年第1期6卷 168-180页

作者： Yongqing MENG Bo LIU Huiyong LUO Shuonan SHANG Haitao ZHANG Xifan WANG School of Electrical Engineering Xi'an Jiaotong University State Grid Sichuan Provincial Electric power Corporation Tianfu New Area power supply company Henan Electric power Research Institute

A fractional frequency transmission system(FFTS)is a promising solution to offshore wind power integration,for which the hexagonal modular multilevel converter(Hexverter)is an attractive choice for power *** Hexverter has recently been proposed to directly connect two three-phase systems of different frequencies and voltage amplitudes,with only six branches in the FFTS in that *** paper examines for the first time the control scheme of the Hexverter when applied to offshore wind power integration via a ***,the frequency-decoupled mathematical model of the Hexverter is deduced by introducing the double dq *** the branch energy of the Hexverter is analyzed in detail and the reactive power constraint equation is *** corresponding control scheme is thoroughly discussed,including the inner loop current control,the outer loop voltage control in both grid-connected mode and passive mode,and a novel optimization method to minimize the circulating current in the ***,a simulation model of offshore wind power integration via a 4-terminal FFTS based on the Hexverter is built in MATALB/Simulink to verify the feasibility of Hexverter and the effectiveness of the control scheme proposed in this paper.

关键词： Hexagonal modular multilevel converter(Hexverter) Offshore wind power integration Fractional frequency transmission system(FFTS) Control scheme Circulating current optimization

Research of an Integrated High-Voltage Energy Metering Device 36

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Research of an Integrated High-Voltage Energy Metering Devic...

A Simple and Effective Surface Defect Detection Method of power Line Insulators for Difficult Small Objects

第36届中国控制会议

作者： Aixiang Zhang Shizhan Song Chuanyong Wang Jian Zhang Kun Wang Liwei Li Zaozhuang power supply company State Grid Shandong Electric Power Company College of Automation and Electrical Engineering Qingdao University

ISBN: (纸本)9781538629185

The traditional metering device has some problems in system reliability,electricity-stealing prevention and *** order to solve the above problems,a new type of integrated high-voltage energy metering device is designed in this *** equal potential of the measuring integrated circuit is suspended on the high-voltage *** AD7753 is used as the core of the electric energy measurement unit to reduce the measurement *** device uses STM32 as the master of *** has many advantages such as low power consumption,saving resources,easy to install,and highly ***,the experimental results show that the performance of the device has reached 0.2 S accuracy requirements.

关键词： system reliability integration high-voltage energy metering device

来源： cnki会议评论

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Computers, Materials & Continua 2024年第4期79卷 373-390页

作者： Xiao Lu Chengling Jiang Zhoujun Ma Haitao Li Yuexin Liu State Grid Jiangsu Electric power Co. Ltd.Nanjing210024China State Grid Changzhou power supply company Changzhou213003China

Insulator defect detection plays a vital role in maintaining the secure operation of power *** address the issues of the difficulty of detecting small objects and missing objects due to the small scale,variable scale,and fuzzy edge morphology of insulator defects,we construct an insulator dataset with 1600 samples containing flashovers and *** a simple and effective surface defect detection method of power line insulators for difficult small objects is ***,a high-resolution featuremap is introduced and a small object prediction layer is added so that the model can detect tiny ***,a simplified adaptive spatial feature fusion(SASFF)module is introduced to perform cross-scale spatial fusion to improve adaptability to variable multi-scale ***,we propose an enhanced deformable attention mechanism(EDAM)*** integrating a gating activation function,the model is further inspired to learn a small number of critical sampling points near reference *** the module can improve the perception of object *** experimental results indicate that concerning the dataset of flashover and breakage defects,this method improves the performance of YOLOv5,YOLOv7,and *** practical application,it can simply and effectively improve the precision of power line insulator defect detection and reduce missing detection for difficult small objects.

关键词： Insulator defect detection small object power line deformable attention mechanism

Proposed methodology for online frequency response analysis based on magnetic coupling to detect winding deformations in transformers

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High Voltage 2020年第3期5卷 343-349页

作者： Yangchun Cheng Jiangang Bi Wenzhi Chang Yuan Xu Xiaohua Pan Xianwei Ma Shuai Chang State Key Laboratory of Alternate Electrical power System with Renewable Energy Sources North China Electric Power UniversityBeijing 102206People's Republic of China Institute of High Voltage Technology China Electric Power Research InstituteBeijing 100192People's Republic of China State Grid Shandong Electric power company Linyi Power Supply CompanyLinyi 276000People's Republic of China State Grid Beijing Electric power company Cable Branch Beijing 100020People's Republic of China Changzhou power supply company State Grid Jiangsu Electric Power CompanyChangzhou 213000People's Republic of China

Frequency response analysis is widely used as a method for the offline diagnosis of winding deformations in power *** apply it to a working transformer,people need to determine how to inject the excitation signal and measure the response signal for windings that bear a rated voltage and *** this study,a method to obtain the frequency response curve online is *** uses the principle of magnetic field coupling to inject a frequency sweep signal into the windings through a Rogowski *** Rogowski coil sensor placed at the root of a high-voltage bushing is used to measure the response current *** on a 72.5 kV bushing show that metal accessories of the bushing have no influence on the injection or the *** feasibility of this method was verified by experiments on charged 110/35/10 kV transformers at a factory and a working 35 kV transformer in a power *** results show that it is safe to install the Rogowski coil at the root of the high-voltage *** excitation signal can be injected into live windings and the response signal is *** electromagnetic power frequency noise can be reduced and the frequency response curve can be measured online.

关键词： winding coupling excitation

Benefit allocation of electricity-gas-heat-hydrogen integrated energy system based on Shapley value

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Clean Energy 2023年第6期7卷 1381-1390页

作者： Yujiao Liu Yan Li Yiping Rong Guoliang Li Ruiqi Wang Haini Zhou Zaozhuang power supply company of State Grid Shandong Province Electric power company Zaozhuang CityShandong 277101China State Grid Shandong Integrated Energy Services Jinan CityShandong 250021China

The integrated energy system is an important development direction for achieving energy transformation in the context of the low-carbon development era,and an integrated energy system that uses renewable energy can reduce carbon emissions and improve energy utilization *** electric power network and the natural gas network are important transmission carriers in the en-ergy field,so the coupling relationship between them has been of wide *** paper establishes an integrated energy system considering electricity,gas,heat and hydrogen loads;takes each subject in the integrated energy system as the research object;anal-yses the economic returns of each subject under different operation modes;applies the Shapley value method for benefit allocation;and quantifies the contribution value of the subject to the alliance through different influencing factors to revise the benefit allocation *** with the independent mode,the overall benefits of the integrated energy system increase in the cooperative mode and the benefits of all subjects *** to the different characteristics of different subjects in terms of environmental benefits,collaborative innovation and risk sharing,the benefit allocation is reduced for new-energy subjects and increased for power-to-gas sub-jects and combined heat and power generation units after revising the benefit allocation,to improve the matching degree between the contribution level and the benefit allocation under the premise of increased profit for each *** cooperative mode effectively enhances the economic benefits of the system as a whole and individually,and provides a useful reference for the allocation of benefits of integrated energy *** analysis shows that the revised benefit distribution under the cooperative model increases by 3.86%,4.08%and 3.13%for power-to-gas subjects,combined heat and power generation units,and new-energy units,respectively,compared with the independent function m

关键词： integrated energy system power-to-gas Shapley value benefit allocation hydrogen energy

Load-Balancing and QoS Based Dynamic Resource Allocation Method for Smart Gird Fiber-Wireless Networks

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Chinese Journal of Electronics 2019年第6期28卷 1234-1243页

作者： XU Siya LI Peng QI Feng GUO Shaoyong ZHOU Guiping DENG Wei LI Yueyue State Key Laboratory of Networking and Switching Technology Beijing University of Posts and Telecommunications Shenyang Electric power supply company State Grid Liaoning Electric Power Company Co.LTd. Beijing Guodiantong Network Technical Co.LTd.

Real-time network resource allocation based on virtualization technology is an important method to solve the solidification problem of Fiber-wireless(Fi-Wi) access networks. To increase the resource utilization and meet the specific QoS requirements of smart gird communication services, a Load-balancing and QoS based dynamic resource allocation method(LbQ-DR) is proposed with three sub-mechanisms. A time-window based substrate network resource update mechanism is designed to describe the realtime resource consumption of substrate networks, which can balance the accuracy of resource status and the complexity of the allocation algorithm.A QoS-based Virtual network request(VNR) sorting mechanism is presented to precisely calculate the priority of VNRs and reasonably sort the incoming services.A load-balancing based resource allocation mechanism is designed to avoid unbalanced resource ***, the channel interference is considered in the cost of embedding and a collision domain mechanism is introduced to decrease interference. Simulation results demonstrate that the proposed method can provide heterogeneous smart grid businesses with differentiated service, improve the utilization and economic benefits of the network and make the network more balanced.

关键词： Load-balancing Quality of Service(QoS) Smart grid communication networks Fiber-wireless(Fi-Wi) networks Resource allocation

A Regulating Capacity Determination Method for Pumped Storage Hydropower to Restrain PV Generation Fluctuations

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CSEE Journal of power and Energy Systems 2022年第1期8卷 304-316页

作者： Shuai Zhang Yue Xiang Junyong Liu Jichun Liu Jingxian Yang Xu Zhao Shafqat Jawad Jing Wang State Grid Chengdu power supply company ChengduSichuan 610041China College of Electrical Engineering Sichuan UniversityChengduSichuan610065China

The variable speed and constant frequency pumped storage hydropower(PSH)unit can strongly support the complementation and joint power supply of cascaded hydropower and photovoltaic(PV)*** fast response capability has provided a feasible solution for the rapid power and voltage regulation caused by real-time fluctuations of PV ***,currently there is a lack of research on precise evaluation on regulation capability and regulating capacity configuration for PSH to restrain the real-time *** this paper,a cascaded hydro-PV-PSH complementary joint power system(CHPP)is studied,and a“rule-based”method for regulating capacity determination is proposed.A combined statistical technique is introduced to analyze the initial estimated regulating capacity of PSH.A continuous cyclic revision method is adopted to renew the ideal PV curve by repeatedly using the main operating constraints until an optimal regulating capacity of PSH matching the PV generation scale is *** results of the case study verified the feasibility and effectiveness of PSH for restraining the fast fluctuations of PV systems in real-time,and the configuration between PV and PSH regulating capacity is obtained with real-time application ***,analyses including weather conditions,curtailed energy and electricity shortage,the sensitivity analysis,and state transition frequency are presented to demonstrate the robustness of this study.

关键词： Cascaded hydro-PV complementation Operating state transition pumped storage hydropower PV Real-time fluctuation regulating capacity configuration

Hydrogeochemical Modeling of the Shallow Thermal Water Evolution in Yangbajing Geothermal Field, Tibet

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Journal of Earth Science 2019年第4期30卷 870-878页

作者： Xiuhua Zheng Chenyang Duan Bairu Xia Yong Jiang Jian Wen School of Engineering and Technology China University of GeosciencesBeijing 100083China State Grid Lhasa power supply company Lhasa 850000China Yangbajing Geothermal power Station State Grid Tibet Electric Power Company LimitedLhasa 850000China

The exploitation of thermal water and the mix of cold water changed the properties of geofluid in shallow reservoir,which altered the concentration of the chemical constitutes and continuously built new water-rock reaction. This paper deduced reservoir pressure and temperature variation tendency from 2004 to 2013,analyzed the change of some components in the shallow reservoir water,and finally obtained the evolution of the shallow geothermal water with hydrogeochemical model. The results show the reservoir pressure decreased significantly compared with the slight decline of reservoir temperature,and much cold groundwater infiltrated into the shallow reservoir,which affected the solubility of SiO2 and led to precipitation,the increased CO2 in shallow reservoir promoted the dissolution of aluminosilicate. Calcite and kaolinite precipitation zone has extended to the north in the field,which influenced the porosity of the reservoir rock.

关键词： reservoir pressure and temperature component analysis hydrochemical modeling dissolution/precipitation