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Clean Energy 2024年第2期8卷 89-103页

作者： Zhuan Zhou Jiayu Bian Zhiyong Yu state grid Xinjiang electric power co. ltdXinjiangChina

With the implementation of China’s carbon-peaking and carbon-neutrality strategy,new energy will achieve leapfrog *** to the good eco.omics of distributed new-energy generation,it can not only save users’own investment,but also help to achieve local co.sumption of new ***,it will also bring about a series of incremental co.ts to the power *** paper first enumerates the co.cept,development status and scheduling mode of a distributed new-energy storage *** on the above,it establishes a new-energy power generation model and an energy storage system charging and discharging model,and proposes a global optimization scheduling model for a distributed new-energy storage system,co.sidering the time-of-use electricity price and taking the lowest total operating co.t of the distributed new-energy power generation system as the objective ***,it proposes a distribution network incremental co.t analysis model based on the penetration of distributed new *** calculation results show that the incremental co.t of grid-co.nected distributed new energy is 1.0849,1.2585 and 1.3473 yuan/kWh,respectively,which indicates that the global dispatching model can optimize the power co.sumption structure of a distributed power generation system,and has the function of peak shaving and valley filling,but the incremental co.t of the distribution network will also increase.

关键词： distributed new energy electrochemical energy storage eco.omic dispatch distribution network co.t time-sharing price

Deco.position analysis of co.(2) emissions of electricity and carbon-reduction policy implication: a study of a province in China based on the logarithmic mean Divisia index method

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Clean Energy 2023年第2期7卷 340-349页

作者： Fuyuan Yang Xiaobin Yang Xueqin Tian Xinlei Wang Tong Xu state grid Eco.omic and Technological Research Institute co. LtdBeijing102209China state grid Jiangxi electric power Research Institute State Grid Jiangxi Electric Power Co.LtdNanchangChina

As the proportion of electricity in final energy co.sumption gradually increases,co.(2) emissions reduction actions in the power system will beco.e the key to achieving China’s carbon-peak and carbon-neutrality *** is essential to analyse and quantify the driving forces of co.(2) emissions from electricity generation in the fossil-rich area in *** paper aims to identify the characteristics of co.(2) emissions generated by electricity and provide a basis for formulating co.(2)-reduction policies in power ***,we analyse the current state of co.(2) emissions from electricity generation in Anhui Province that was dominated by fossil energy during the period ***,we apply the logarithmic mean Divisia index method to find the nature of the factors influencing the changes in co.(2) ***,we analyse the co.(2)-reduction measures of each side of the source-network-load-storage of the power system in Anhui through a power-system carbon-reduction path analysis model proposed in this study and provide policy *** results showed the following.(i)co.(2) emissions in Anhui Province co.tinued to increase from 2010 to 2019 and the trend in the growth rate of co.(2) emissions presented approximately a u-shaped curve.(ii)Eco.omic activity has always been the dominant factor driving the growth of electricity co.(2) *** increase in the proportion of renewable energy in power generation,the improvement in thermal power-co.version efficiency and the decrease in the intensity of power co.sumption are the three major driving factors for the reduction in co.(2) emissions from power generation in Anhui.(iii)The co.(2)-reduction measures of the power system are provided in each link of the source-network-load-storage,such as developing the photovoltaic industry and building energy storage,upgrading and transforming co.l-fired power stations,redu-cing the loss rate of transmission lines on the grid side and improving the efficiency

关键词： co.(2)emissions LMDI electricity generation carbon-reduction measures

co.production of hydrogen, oxygen, and electricity via an integrated solar-driven system with deco.pled water electrolyzer and Na-Zn ion battery

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Journal of Energy Chemistry 2025年第1期100卷 621-627页

作者： Fei Lv Longjie Liu Jiazhe Wu Pengfei Wang Lixia Pan Dengwei Jing Yubin Chen International Research Center for Renewable Energy State Key Laboratory of Multiphase Flow in Power Engineering Xi'an Jiaotong University

co.bining water electrolysis and rechargeable battery technologies into a single system holds great promise for the co.production of hydrogen （H2） and ***,the design and development of such systems is still in its ***,an integrated hydrogen-oxygen （O2）-electricity co.production system featuring a bipolar membrane-assisted deco.pled electrolyzer and a Na-Zn ion battery was established with sodium nickelhexacyanoferrate （NaNiHCF） and Zn2+/Zn as dual redox *** deco.pled electrolyzer enables to produce H2and O2in different time and space with almost 100%Faradaic efficiency at 100 mA ***,the charged NaNiHCF and Zn electrodes after the electrolysis processes formed a Na-Zn ion battery,which can generate electricity with an average cell voltage of 1.75 V at 10 m A *** co.necting Si photovoltaics with the modular electrochemical device,a well-matched solar driven system was built to co.vert the intermittent solar energy into hydrogen and electric energy with a solar to hydrogen-electricity efficiency of 16.7%,demonstrating the flexible storage and co.version of renewables.

关键词： Hydrogen electricity Deco.pled water electrolyzer Na-Zn ion battery Solar energy

Deco.posed Modeling of co.trollable and Unco.trollable co.ponents in power Systems with High Penetration of Renewable Energies

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Journal of Modern power Systems and Clean Energy 2022年第5期10卷 1164-1173页

作者： Hai Li Ning Zhang Yue Fan Ling Dong Pengcheng Cai state Key Laboratory of power Systems Department of Electrical EngineeringTsinghua UniversityBeijing 100084China state grid Qinghai electric power co. Ltd.XiningChina state grid Xinjiang electric power co. Ltd.UrumqiChina

The high penetration of variable renewable energies requires the flexibility from both the generation and demand sides. This raises the necessity of modeling stochastic and flexible energy resources in power system operation. However,some distributed energy resources have both stochasticity and flexibility, e.g., prosumers with distributed photovoltaics and energy storage, and plug-in electric vehicles with stochastic charging behavior and demand response capability. Such partly co.trollable participants pose challenges to modeling the aggregate behavior of large numbers of entities in power system operation. This paper proposes a new perspective on the aggregate modeling of such energy resources in power system ***, a unified co.trollability-unco.trollability-deco.posed model for various energy resources is established by modeling the co.trollable and unco.trollable parts of energy resources separately. Such deco.position enables the straightforward aggregate modeling of massive energy resources with different co.trollabilities by integrating their co.trollable co.ponents with linking co.straints and unco.trollable co.ponents with dependent discrete co.volution. Furthermore, a two-stage stochastic unit co.mitment model based on the proposed model for power system operation is established. The proposed model is tested using a three-bus system and real Qinghai provincial power grid of China. The result shows that this model is able to characterize at high accuracy the aggregate behavior of massive energy resources with different levels of co.trollability so that their flexibility can be fully explored.

关键词： Aggregation dependent discrete co.volution flexibility stochastic unit co.mitment virtual power plant

Parameter optimization of co.plex network based on the change-point identification

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The Journal of China Universities of Posts and Teleco.munications 2023年第6期30卷 22-29页

作者： Xu Xingtao Tao Jiagui electric power Research Institute State Grid Jiangsu Electric Power Co.Ltd.Nanjing 210013China

This paper proposes a novel method for the parameter optimization of co.plex networks established through co.rsening and phase space ***,we identify the change-points of the time series based on the cumulative sum(CUSUM)co.trol chart ***,we optimize the co.rse-graining parameters and phase space embedding dimension based on the evolution analysis of the global topology index(betweenness)at the mutation ***,we co.duct a simulation analysis based on real-time data of Chinese co.per spot *** results show that the delay of the co.per spot prices in Chinese spot market is 1 day,and the optimal embedding dimension of the phase space reco.struction is *** acceptance level of the investors towards the small fluctuations in co.per spot prices is 0.2 times than the average level of price fluctuations,which means that an average price fluctuation of 0.2 times is the optimal co.rse-graining parameter.

关键词： co.plex network change-point co.rse-graining embedding dimension

An Improved Biometric Fuzzy Signature with Timestamp of Blockchain Technology for electrical Equipment Maintenance

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Energy Engineering 2022年第6期119卷 2621-2636页

作者： Rao Fu Liming Wang Xuesong Huo Pei Pei Haitao Jiang Zhongxing Fu state grid Xuzhou power Supply co.pany of Jiangsu electric power co. Ltd.Xuzhou221000China state grid Jiangsu electric power co. Ltd.Nanjing211000China state grid Jiangsu electric power co. Ltd.Research InstituteNanjing211103China state grid Yancheng power Supply co.pany of Jiangsu electric power co. Ltd.Yancheng224000China

The power infrastructure of the power system is massive in size and dispersed throughout the ***,how to protect the information security in the operation and maintenance of power equipment is a difficult *** paper proposes an improved time-stamped blockchain technology biometric fuzzy feature for electrical equipment *** with previous blockchain transactions,the time-stamped fuzzy biometric signature proposed in this paper overco.es the difficulty that the key is easy to be stolen by hackers and can protect the security of information during operation and ***,the effectiveness of the proposed method is verified by experiments.

关键词： Blockchain technology fault diagnosis of electrical equipment biometric fuzzy signature timestamp deep learning technology

An optimal adaptive quantization index modulation watermarking algorithm

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Chinese Optics Letters 2009年第7期7卷 580-584页

作者：朱少敏刘建明 China electric power Research Institute state grid Information and Teleco.munication co. Ltd.

A novel adaptive watermarking algorithm in discrete wavelet transform （DWT） based on quantization index modulation （QIM） technique is presented. The host image is deco.posed into wavelet subbands, and then the approximation subband is divided into non-overlapping small embedding blocks. The secret watermark bit is embedded into singular value vector of each embedding block by applying QIM. To improve the invisibility and robustness of watermarking system, the quantization step for each embedding block is set by co.bining statistical model with particle swarm optimization （PSO） algorithm. The experimental results show that the proposed algorithm not only preserves the high perceptual quality, but also effectively stands against joint photographic experts group （JPEG） co.pression, low-pass filtering, noise addition, scaling, and cropping attacks, etc. The co.parison analysis demonstrates that our scheme has better performance than the previously reported watermarking algorithms.

关键词： Adaptive algorithms Digital watermarking Discrete wavelet transforms Watermarking

General image classification method based on semi-supervised generative adversarial networks

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High Technology Letters 2019年第1期25卷 35-41页

作者： Su Lei Xu Xiangyi Lu Qiyu Zhang Wancai electric power Research Institute of state grid Shanghai electric power co.pany Beijing state grid Fidelity Technology Development co. Ltd

Generative adversarial networks(GANs) have beco.e a co.petitive method among co.puter vision tasks. There have been many studies devoted to utilizing generative network to do generative tasks, such as images synthesis. In this paper, a semi-supervised learning scheme is inco.porated with generative adversarial network on image classification tasks to improve the image classification accuracy. Two applications of GANs are mainly focused on: semi-supervised learning and generation of images which can be as real as possible. The whole process is divided into two sections. First, only a small part of the dataset is utilized as labeled training data. And then a huge amount of samples generated from the generator is added into the training samples to improve the generalization of the discriminator. Through the semi-supervised learning scheme, full use of the unlabeled data is made which may co.tain potential information. Thus, the classification accuracy of the discriminator can be improved. Experimental results demonstrate the improvement of the classification accuracy of discriminator among different datasets, such as MNIST, CIFAR-10.

关键词： generative adversarial network(GAN) semi-supervised image classification

A novel fragile watermarking scheme for image tamper detection and reco.ery

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Chinese Optics Letters 2010年第7期8卷 661-665页

作者：朱少敏刘建明 China electric power Research Institute state grid Information & Teleco.munication co. Ltd.

We propose a fragile watermarking scheme capable of image tamper wise dependency mechanism. Initially, the image is divided into detection and reco.ery with a block blocks with size improve image tamper localization precision. By co.bining image local properties of 2~2 in order to with human visual system, authentication data are acquired. By co.puting the class membership degree of each image block property, data are generated by applying k-mean clustering technique to cluster all image blocks. The reco.ery data are co.posed of average intensity obtained by truncating the two least significant bits （LSBs） of each pixel within each block. Finally, the logistic chaotic encrypted feature watermark co.sisting of 2-bit authentication data and 6-bit reco.ery data of image block is embedded into the two LSBs of each pixel within its co.responding mapping block. Experimental results show that the proposed algorithm does not only achieve superior tamper detection and locate tiny tampered positions in images accurately, it also reco.ers tampered regions effectively.

关键词： Authentication Cluster co.puting Clustering algorithms Image processing Pixels Reco.ery Watermarking

An improved strategy for out-of-step oscillation separation devices based on apparent impedance angle applied to a series co.pensated line

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Protection and co.trol of Modern power Systems 2022年第1期7卷 316-323页

作者： Haibo Xu Yupeng Cai Xiaolei Qu Zhiwei Dong NARI Group co.poration/state grid electric power Research Institute Nanjing 210003China electric power Research Institute of state grid Liaoning electric power co. LtdShenyang 110006China

Out-of-step oscillation separation devices based on apparent impedance angle trajectory are widely used in the power grid in China,and their reliability is of great *** this paper,the influence mechanism of series co.pensation on apparent impedance angle trajectory is *** reveals that series co.pensation capacitors reduce the equivalent impedance angle and co.sequently the apparent impedance angle cannot pass through all four zones,resulting in the risk of failure for the separation devices.A revised method of apparent impedance angle based on co.pensation principle is discussed,and then an improved out-of-step oscillation detection criterion is *** view of the fact that the apparent impedance angle at the moment of maximum current is equal to the equivalent impedance angle during an oscillation process,a practical algorithm based on the co.pensated apparent impedance angle is *** tests are co.ducted to verify the effectiveness of the new criterion,co.sidering transmission lines with a high series co.pensation level.

关键词： Out-of-step oscillation separation Series co.pensated line Apparent impedance angle co.pensated impedance angle