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2023 IEEE International Conference on power Science and Technology, ICPST 2023

作者： Xia, Yi Ma, Hongxia Yu, Xijuan Wu, Yanhua Yang, Xunfa Xue, Liang Zhu, Hong Zhang, Peiqing State Grid Gansu Electric Power Company Linxia Power Supply Company Linxia China Lanzhou Jiaotong University Key Laboratory of Optoelectronic Technology and Intelligent Control of Ministry of Education Lanzhou China

ISBN: (纸本)9798350311358

Due to the diversity of intelligent measuring equipment and the risk of subsystem communication, the integrated energy system is vulnerable to network attacks. Aiming at the security problem of integrated energy system, an intrusion detection method based on whitening PCA is proposed in this paper,based on the analysis of the structure of the integrated energy system and the characteristics of the integrated energy information physical system. Firstly, the dataset is preprocessed based on the normalization method, using whitening algorithm and PCA algorithm to extract the features and reduce the dimension of the *** principal component value is obtained after data dimensionality reduction. Then support vector machine is used to classify and train the dimensionality reduction data *** classification decision function is obtained for *** the analysis of numerical example, the effectiveness is verified of the proposed method in intrusion *** detection rate is higher and the detection time is shorter. © 2023 IEEE.

关键词： Intrusion detection

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Device-level multi-rate electromagnetic transient simulation of power systems based on latency insertion method 7

Device-level multi-rate electromagnetic transient simulation...

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7th Asia Conference on power and Electrical Engineering, ACPEE 2022

作者： Ding, Haoyin Wang, Qiguo Miao, Yuancheng Cao, Lu Yan, Zheng Wang, keyou State Grid Corporation of China Power Dispatching and Control Center East China Branch Shanghai China Shanghai Jiao Tong University Key Laboratory of Control of Power Transmission and Conversion Shanghai China

ISBN: (纸本)9781665418195

In order to satisfy the demands of efficiency and accuracy of the electromagnetic transient (EMT) simulation of complex power systems, the paper proposes a device-level multi-rate electromagnetic transient simulation method based on the latency insertion method (LIM). The method takes the transmission grid as the upper layer modeling framework, and power electronics devices, synchronous generators, and other devices are connected to it in the form of controlled sources. Then, a natural decoupling network with the transmission grid as the main body and the rest of the equipment dispersed access is forming. Thus, the multiple time scale characteristics of various equipment in the power system can give full consideration, and the device-level multi-rate electromagnetic transient simulation can be realized by using different step sizes for different devices. Finally, this paper takes the improved IEEE-Case9 system as a case to prove the accuracy of the proposed multi-rate simulation algorithm and takes the cascade system of 10 improved IEEE-Case9 systems as a case to prove the efficiency of the multi-rate simulation algorithm. © 2022 IEEE.

关键词： Efficiency

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Electric Vehicles Cluster Division and Optimized Charging Scheduling Strategy for Coordinated Wind power Consumption 25

Electric Vehicles Cluster Division and Optimized Charging Sc...

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25th IEEE China Conference on System Simulation Technology and its Application, CCSSTA 2024

作者： Wang, Haobo Liu, Jiancun Kong, Xiangyu Zhang, Zhihan Tianjin University of Technology Tianjin Key Laboratory of New Energy Power Conversion Transmission and Intelligent Control Tianjin China Tianjin University School of Electrical and Information Engineering Tianjin China Power Supply Bureau Shenzhen China Southern Power Grid Guangdong518028 China

ISBN: (纸本)9798350366600

Aiming at the current lack of effective pricing strategies for electric vehicles participating in wind power consumption, a cluster partitioning and charging and discharging optimization scheduling strategy is proposed based on the regulatory potential of electric vehicles for wind power consumption. Firstly, the regulatory potential of electric vehicles is divided into two aspects, time scheduling, and spatial scheduling, to construct an overall evaluation index for electric vehicles. Secondly, based on the constructed overall evaluation indicators for electric vehicles, electric vehicles are grouped, and a dynamic time of use electricity price model based on cluster partitioning is established. Then, we will establish an objective function that minimizes the peak valley difference of power grid load and maximizes the benefits of EV users. We will also establish a visual model considering wind power consumption and EV user benefits. The proposed method was validated through simulation examples, which proved credible and effective. © 2024 IEEE.

关键词： State of charge

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Review on Risk Assessment of power System under Rainstorm-Flood and Disaster control Improvement Strategies 1

Review on Risk Assessment of Power System under Rainstorm-Fl...

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2024 1st International Conference on Smart grids and power Systems, ICSGPS 2024

作者： Wu, Wenjie Hou, Hui Zhou, Yangjun Wei, Guohui Zhang, Wei Zhong, Shiwen School of Automation Wuhan University of Technology Wuhan China Guangxi Key Laboratory of Intelligent Control and Operation and Maintenance of Power Equipment Electric Power Research Institute of Guangxi Power Grid Co. Ltd. Nanning China Guangxi Power Grid Co. Ltd. Nanning China Guangxi Power Grid Equipment Monitoring and Diagnosis Engineering Technology Research Center Electric Power Research Institute of Guangxi Power Grid Co. Ltd. Nanning China

The global warming and El Nino effects are becoming more and more obvious now. These result in frequent rainstorms, especially in coastal areas. It is necessary to deeply study evolution mechanism of rainstorm-flood disasters, assess disaster risk of power grid, and formulate efficient power grid flood control strategies. Firstly, the research progress of disaster modeling is summarized according to the disaster evolution mechanism. The differences between hydrological models and machine learning models are compared, and the possibility of combining them is discussed. Secondly, current disaster risk assessment methods of power grid and their application in rainstorm-flood disasters to quantify flood prevention capacity are reviewed. Thirdly, the power grid flood control measures are studied from the perspective of pre-disaster grid reinforcement and post-disaster repair to improve resilience. Finally, in view of the above content, the shortcomings of current researches and feasible research directions in the future are proposed. © 2024 Published under licence by IOP Publishing Ltd.

关键词： Disasters

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A Value Set Approach for Stability Region Determination for Time Delayed power Systems with Multiple Uncertain Parameters 7

A Value Set Approach for Stability Region Determination for ...

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7th IEEE International Electrical and Energy Conference, CIEEC 2024

作者： Shi, Xiubao Ye, Hua Gao, Lei Hou, Kaiyuan Wang, Kefei Shandong University Key Laboratory of Power System Intelligent Dispatch and Control of Ministry of Education Jinan China China Electric Power Research Institute Power System Department Beijing China State Grid Cooperation of China Dispatch and Communication Center Northeast Branch Shenyang China

ISBN: (纸本)9798350359558

This paper develops a stability region computation method for time delayed power systems based on the value set method. It is designed to accommodate systems with multiple uncertain parameters and time delays. This method serves to analyze the small signal stability margin of power systems and offer guidance for system parameter design. Different from many previous works, this method achieves relatively high efficiency without any conservativeness. First, it processes polynomials with exponentials through polynomial transformations. Second, by continuously subdividing and discriminating the uncertain space, the parameter stability region of the system is obtained. Finally, the effectiveness and accuracy of the proposed method are validated through simulation examples in MATLAB/Simulink. © 2024 IEEE.

关键词： Time delay

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Two-stage multi-objective optimal dispatch of hybrid power generation system for ramp stress mitigation

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INTERNATIONAL JOURNAL OF ELECTRICAL power & ENERGY SYSTEMS 2024年 163卷

作者： Zhang, Kunpeng Liu, Tianhao Liu, Yutian Ma, Huan Ma, Linlin Shandong Univ Key Lab Power Syst Intelligent Dispatch & Control Minist Educ Jinan 250061 Peoples R China State Grid Shandong Elect Power Res Inst Power Grid Technol Ctr Jinan 250003 Peoples R China State Grid Shandong Elect Power Co Shandong Elect Power Dispatching & Control Ctr Jinan 250001 Peoples R China

As the penetration of renewable energy continues to rise, the occurrence of ramp events in renewable generation poses significant challenges to power system security and efficient renewable energy utilization. To optimize the power allocation of hybrid energy storage systems (HESS) and enhance adjustable reserves to mitigate ramp events, a day-ahead and intraday two-stage multi-objective optimal dispatch strategy is proposed for hybrid power generation systems containing wind, photovoltaic, battery and hydrogen energy storage system (ESS). First, a novel optimization objective is presented to regulate the response priorities of different ESS by minimizing the energy loss, and balance the conservatism by a penalty factor. Then, a two-stage optimal dispatch model is proposed including two sub-models. The day-ahead multi-objective dispatch model considers generation plan, available storage capacity and energy loss, which identifies time slots when adjustable reserves is insufficient;the intraday dispatch model dynamically adjusts penalty factor for each time slot based on the day- ahead results to enhance adjustable reserves in advance. This combination of day-ahead and intraday dispatch models improves the farsightedness and computational efficiency. Finally, a non-isometric scaling method is presented to improve the distribution of Pareto optimal solutions for the non-dominated sorting genetic algorithm III (NSGA-III). Simulation results based on the actual data from Belgium and China demonstrate that the proposed method effectively mitigates the ramp stress and improves renewable energy utilization, with high computational efficiency and robustness to parameters.

关键词： Hybrid energy storage system Multi-objective optimization NSGA-III power generation dispatch power ramping mitigation

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Optimal power System Scheduling Considering Uncertainty-Induced Generation Unit Output Curtailment 25

Optimal Power System Scheduling Considering Uncertainty-Indu...

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25th IEEE China Conference on System Simulation Technology and its Application, CCSSTA 2024

作者： Hu, Wei Mi, Ning Zhong, Hailiang Chen, Weihan Ma, Kun Geng, Tianxiang Wang, Yun Su, Bo Yang, Long Tsinghua University State Key Laboratory of Power System and Generation Equipment Department of Electrical Engineering Beijing China Dispatching Control Center State Grid Ningxia Electric Power Co. Ltd. Yinchuan China Tsinghua University Department of Electrical Engineering and Applied Electronic Technology Beijing China

ISBN: (纸本)9798350366600

Under the call of the national 'dual carbon' goals, the growth of the proportion of new energy generation has become an inevitable trend in energy structure adjustment. The 'static parameter' model, which traditional thermal power units rely on, can no longer accurately reflect their output uncertainty, urgently requiring a new optimization scheduling strategy to cope with this change. This study proposes an optimized scheduling model for power generation systems that considers the output curtailment and unplanned outages of thermal power units. It employs non-parametric kernel density estimation techniques to model the uncertainty of thermal power unit output and uses chance constraints to define the fluctuation range of generation output and the system's reliability. The model adopts a scenario generation method based on Copula theory to construct output scenarios and further employs reduction techniques to optimize the number of scenarios. Moreover, this paper introduces Conditional Value at Risk as a key indicator to measure the cost of system uncertainty risk, thereby providing a more comprehensive perspective in risk assessment. Simulation experiments on the IEEE 30-node standard system demonstrate that compared to traditional optimization scheduling models relying on static parameters, the proposed model can more effectively balance the output fluctuations of different thermal power units, significantly reducing the risk of curtailment due to supply shortages. This study offers a new theoretical basis and practical guidance for optimizing the scheduling of power systems under the context of large-scale integration of new energy and economic fluctuations. © 2024 IEEE.

关键词： Chance Constraints Conditional Value at Risk Output Curtailment Scenario Generation

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Active Support Performance Test of grid-connected Photovoltaic System Based on grid-forming control 3

Active Support Performance Test of Grid-connected Photovolta...

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3rd International Conference on intelligent power and Systems, ICIPS 2023

作者： Xi, Xinze Hu, Yun Xing, Chao Guo, Qi Xu, Shoudong Tu, Liang He, Peng Zhu, Yihua Su, Mingzhang Luo, Chao Yunnan Electric Power Research Institute Kunming China National Energy Power Grid Technology R&D Centre Guangzhou China State Key Laboratory of HVDC Electric Power Research Institute CSG Guangzhou China Guangdong Provincial Key Laboratory of Intelligent Operation and Control for New Energy Power System Guangzhou China CSG Key Laboratory for Power System Simulation Electric Power Research Institute China Southern Power Grid Guangzhou China

ISBN: (纸本)9798350328691

With the continuous increase penetration of new energy, the integration of grid-following (GFL) converter is prone to frequency stability issue, while the utilization of grid-forming (GFM) converter with active support capability has become an inevitable trend in development. In this paper, the model of grid-connected photovoltaic system using GFL/GFM control is established. The support characteristic of GFM is compared and analyzed in different testing scenarios with GFL as the reference: (1) Small disturbance test (2) Large disturbance test (3) Island capability test. Finally, the active support performance of the system is quantitatively analyzed based on corresponding evaluation indexes. ©2023 IEEE.

关键词： power converters

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Calculation and Analysis Method of power Quality in Wind-power-storage Combined System Based on ETAP 3

Calculation and Analysis Method of Power Quality in Wind-pow...

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3rd International Conference on New Energy and power Engineering, ICNEPE 2023

作者： Song, Yi Hu, Hong Pan, Zhen Electric Power Research Institute of Guangxi Power Grid Co. Ltd Guangxi Nanning530023 China Guangxi Key Laboratory of Intelligent Control and Maintenance of Power Equipment Guangxi Nanning530023 China Guangxi Power Grid Co. Ltd Guangxi Nanning530023 China

ISBN: (纸本)9798350393224

The increasing integration of expansive wind farms into the power grid, along with the widespread implementation of energy storage on the grid, has led to a growing focus on the power quality issue within the combined wind power storage system. Therefore, this paper analyzes the power quality of the wind-power-storage combined system from the aspects of harmonic analysis, voltage fluctuation, and power flicker, aiming at the wind power injection and energy storage access to the power system, and proposes an ETAP-based power quality calculation and analysis method for the wind-power-storage combined system. Based on a combined wind power storage system, the method proposed in this paper is simulated and analyzed by using ETAP software to calculate the harmonic content, voltage fluctuation, and power flicker value of the system. The simulation results show that the method proposed in this paper can be effectively used to analyze and evaluate the power quality problems of the combined wind power storage system. © 2023 IEEE.

关键词： combined system energy storage power quality wind farm

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A Novel Bidirectional Converter for Spacecraft Battery Charge and Discharge Systems 5

A Novel Bidirectional Converter for Spacecraft Battery Charg...

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5th International Conference on power and Energy Technology, ICPET 2023

作者： Yang, Shuaifei Li, Yang Liu, Yang Wu, Chunyu Liu, Shichao Shi, Lei Jia, Lei Shanghai Institute of Space Power-Sources State Key Laboratory of Space Power-Sources Technology Shanghai China State Grid Anhui Electric Power Company State Grid Lu'an Dispatching and Control Center Anhui China The First Military Representative Office Baotou District for Army Equipment Department Inner Mongolia China

ISBN: (纸本)9798350339673

The battery charge and discharge regulator (BCDR) is an important component of space power supply system. The use of bidirectional DC-DC converter instead of traditional dual unidirectional DC-DC converter can make the whole power supply lighter, smaller in size and higher in power density, which meets the development needs of miniaturization and lightweight of space power supply in the future. In this paper, a bidirectional SuperBuck-Boost DC-DC converter integrated charging and discharging circuit topology is proposed, and the operation principle and characteristics of the circuit topology are analyzed, The battery charge and discharge control strategy based on the bidirectional SuperBuck-Boost converter is proposed, and the feasibility of the circuit topology and control strategy is verified by a 500W prototype. © 2023 IEEE.

关键词： bidirectional DC-DC converter keywords-battery charge and discharge regulator (BCDR) SuperBuck-Boost

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