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IEEE International Conference on power and power and Renewable Energy (ICPRE)

作者： Lian Tu Shuiping Zhang Hengdao Guo Bo Bao Yihua Zhu Jian Zuo China Southern Power Grid Power Dispatch and Control Center of Guangdong Power Grid Co. Ltd China China Southern Power Grid State Key Laboratory of HVDC Electric Power Research Institute China National Energy Power Grid Technology R&D Centre China Operation and Control for New Energy Power System Guangdong Provincial Key Laboratory of Intelligent China

With the increase of DC feed power and the decrease of the number of synchronous machines, receiving-end power system takes a serious threat to the transient voltage stability. Therefore, a transient voltage stability preventive control strategy for DC receiving-end power system is proposed in this paper. The whole method is decomposed into three sub-problems: transient voltage stability assessment, sensitivity computation and optimal control. A transient voltage stability index suitable for the sensitivity method is used to construct the transient voltage stability constraints. The accuracy and efficiency of the solution algorithm are improved by limiting the effective control interval of sensitivity and selection of the initial control set. The method has been applied in a provincial power grid in southern China. The results verifies the effectiveness of the proposed method.

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The Correlation Mechanism that Micro-Structure Parameters of ZnO Varistor to the Macroscopic Electrical Characteristics

The Correlation Mechanism that Micro-Structure Parameters of...

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International Conference on Electrical Materials and power Equipment (ICEMPE)

作者： Pengfei Meng Jingke Guo Long Zhao Wenhao Lu Zheng Liu Shan Li Kai Zhou Jun Hu College of Electrical Engineering Sichuan University Chengdu China State Grid Linyi power supply company STATE GRID Corporatio of China Linyi China High Voltage Technology Department Extra High Voltage Power Transmission Company of CSG Guangzhou China State Key Laboratory of Intense Pulsed Radiatio Simulation and Effect Northwest Institute of Nuclear Technology Xi’an China State Key Laboratory of Control and Simulation of Power System and Generation Equipment Tsinghua University Beijing China

As the core part of metal oxide arresters, ZnO varistor plays an important part in suppressing the overvoltage of power systems. With the development of UHV technology, the residual voltage and energy capacity of ZnO varistors have put forward higher requirements. The research is carried out from the perspective of material calculation, studied the correlation mechanism between micro-structure parameters and various macroscopic electrical characteristics of ZnO varistor based on Voronoi network. And the microstructure parameters such as grain size and size inhomogeneity were calculated and studied. The study simplified the optimization problem with multiple variates and objectives, into the one with two categories of variates and two categories of objectives. And then proposed specific strategies. The research provides important theoretical basis for improving the performance of ZnO varistors, and witch is of great significance for the design and manufacture of high-performance lightning arresters.

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Resilience assessment and improvement for electric power transmission systems against typhoon disasters: A data-model hybrid driven approach

arXiv

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arXiv 2022年

作者： Yang, Rui Li, Yang Key Laboratory of Modern Power System Simulation and Control & Renewable Energy Technology Ministry of Education [Northeast Electric Power University Jilin132012 China

In response to the damage to electric power transmission systems caused by typhoon disasters in coastal areas, a planning-targeted resilience assessment framework that considers the impact of multiple factors is established to accurately find the weak links of the transmission system and improve the system resilience. Firstly, this paper constructs the attenuation model of the wind field and the comprehensive failure model of the system, in which the model drive to establish the cumulative failure model of the transmission system is adopted, and multiple data-driven schemes to correct the cumulative failure rate by relying on the feature factor information of the transmission system is adopted. At the same time, an analytic hierarchy process-weighted arithmetic averaging (AHP-WAA) method is introduced to select the optimal data-driven evaluation scheme. Secondly, this paper adopts the impact-increment-based state enumeration (IISE) method to establish resilience indicators for systems and corridors separately. On this basis, the optimal promotion strategy is selected according to the construction difficulty, resilience improvement ability, and cost analysis. Finally, simulations on the IEEE RTS-79 system have been carried out considering the influence of the real typhoon scenarios, micro-topographic and transmission corridor information factors. The results demonstrate that the hybrid-driven system resilience assessment and improvement method can assist planners in accurately judging the resilience level of the system against typhoon disasters and selecting the best resilience improvement strategy based on the cost-effectiveness ratio. Copyright © 2022, The Authors. All rights reserved.

关键词： Analytic hierarchy process

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Effect of ZnO Catalyst on the Degradation of SF6 by DBD Plasma

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IEEE Transactions on Dielectrics and Electrical Insulation 2025年

作者： Li, Yalong Tan, Huiyu Gao, Peng Zhang, Xiaoxing Wang, Dibo Fu, Mingli Zhuo, Ran Yu, Lei Liu, Wei Hubei University of Technology Hubei Key Laboratory for High-efficiency Utilization of Solar Energy and Operation Control of Energy Storage System Wuhan430068 China CSG Electric Power Research Institute Co. Ltd Guangzhou510663 China State Grid Anhui Electric Power Company Electric Power Research Institute Hefei230022 China

Sulfur hexafluoride (SF6) is widely used in gas-insulated equipment due to its excellent electrical properties. However, SF6 is a potent greenhouse gas, and with the implementation of the "dual carbon" strategy, reducing SF6 emissions has become imperative. This paper analyzes the interaction between SF6 and the ZnO surface through simulation calculations and studies the effects of ZnO-filled systems on SF6 degradation by DBD through experiments. The results demonstrate that the charge transfer of individual fluorine atoms is relatively weak, with no significant charge transfer occurring before and after the adsorption of each fluorine atom. Furthermore, after adsorption on the ZnO surface, the SF6 molecule does not undergo noticeable deformation, indicating that the adsorption of SF6 on the ZnO surface is physical adsorption. Under the conditions of a 2% SF6 concentration, a gas flow rate of 150 mL/min, and an input power of 90 W, the SF6 degradation rate and equivalent capacitance with ZnO filling were found to be 96.6% and 79.31 pF, respectively. At an input power of 80W, the energy yield reached a maximum value of 12.41 g/kWh, and the main decomposition products of SF6 were SO2, SO2F2, and SOF2. This study provides a theoretical basis for the efficient degradation and harmless treatment of SF6 © 1994-2012 IEEE.

关键词： Adsorption

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Performance-Aware control of Modular Batteries For Fast Frequency Response

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IEEE Transactions on Sustainable Energy 2025年

作者： He, Yutong Ruan, Guangchun Zhong, Haiwang Tsinghua University State Key Laboratory of Power System Operation and Control Department of Electrical Engineering Beijing100084 China Massachusetts Institute of Technology Lab for Information and Decision Systems CambridgeMA02139 United States

Modular batteries can be aggregated to deliver frequency regulation services for power grids. Although utilizing the idle capacity of battery modules is financially attractive, it remains challenging to consider the heterogeneous module-level characteristics such as dynamic operational efficiencies and battery degradation. In addition, real-time decision making within seconds is required to enable fast frequency response. In order to address these issues, this paper proposes a performance-aware scheduling approach for battery modules to deliver fast frequency response (FFR) support. In particular, the conduction loss and switching loss of battery packs as well as converters are captured within a mix-integer quadratic constrained program (MIQCP). The cycle-based aging model identifies the aging cost of battery modules during frequent cycling by introducing the aging subgradient calculation and linearization. Case studies based on real-world battery data show that the proposed scheduling approach can effectively reduce power loss cost by nearly 28%-57% and battery aging cost by 4%-15% compared to conventional methods, which can also enhance the SoC balance. © 2010-2012 IEEE.

关键词： Battery management systems

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LiFePO4 Battery SOC Estimation under OCV-SOC Curve Error Based on Adaptive Multi-Model Kalman Filter

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IEEE Transactions on Transportation Electrification 2025年

作者： Paizulamu, Daniyaer Cheng, Lin Xu, Helin Zhuang, Yingrui Qi, Ning Ci, Song Tsinghua University State Key Laboratory of Power System Operation and Control Department of Electrical Engineering Beijing100084 China Columbia University Department of Earth and Environmental Engineering New YorkNY10027 United States

LiFePO4 batteries are widely used in electric vehicles and energy storage systems due to long cycle life and high safety performance. However, the open circuit voltage-state of charge curve (OSC) of these batteries features a long plateau region, making state of charge (SOC) estimation highly sensitive to OSC error, which arises due to aging and temperature. To address this, we propose an SOC estimation method that accounts for error in OSC. First, we establish battery equivalent circuit model and introduce a parameters identification algorithm based on adaptive recursive least squares. Next, we derive the relationship between the innovation's cross-correlation matrix/auto-correlation matrix of the Kalman filter and the OSC error. We then develop an adaptive multi-model Kalman filter, which dynamically adjusts the measurement model parameters of each filter based on the sign of the OSC error. By assigning a probability to each filter according to its predicted voltage distribution function, the optimal filter is selected. The proposed method is tested under various OSC error types and operating conditions. Results demonstrate that the proposed method achieves high accuracy and robustness, with root mean square error of less than 0.03, also offers significant advantages in computational efficiency, interpretability, and generalizability. © 2015 IEEE.

关键词： Distribution functions

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Equivalence analysis of different sequence impedance modeling methods

Equivalence analysis of different sequence impedance modelin...

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China International Electrical and Energy Conference (CIEEC)

作者： Qiao Fang Facai Xing Zhe Jiang Yujing Zhao Cheng Wu Power Grid Technology Center State Grid Shandong Electric Power Research Institute Jinan China Key Laboratory of Power System Intelligent Dispatch and Control of Ministry of Education Shandong University Jinan China Shandong Electric Power Dispatching and Control Center State Grid Shandong Electric Power Company Jinan China

The sequence impedance has a clear physical meaning and can be directly measured by commercial equipment, so it is widely used for stability analysis in the field of electrical engineering. It can be transformed from dq impedance indirectly or calculated based on Harmonic state Space (HSS) theory directly. This paper analyzes the equivalence of the above two methods. Firstly, the dq impedance model of grid-connected converter is established, and the equivalence of impedance in dq domain and sequence domain is proved by mathematical transformation. Then, modified sequence impedance model of grid-connected converter is established considering the frequency coupling phenomenon. On the other hand, the impedance model can also be obtained from HSS modeling with h order harmonics. Subsequently, the relationship between the modified sequence impedance and HSS impedance can be found. The former is a special case when the latter takes h=2. When considering the coupling effect of higher harmonics, HSS impedance model has higher accuracy. Finally, the accuracy and the equivalence of the above-mentioned two methods are verified by frequency sweep.

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Improved active damping control strategy and closed-loop parameter design for LCL grid-connected inverter

Improved active damping control strategy and closed-loop par...

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2021 International Conference on Electrical Engineering and Computer Technology, ICEECT 2021

作者： Chen, Qi Liu, Hongbo Hao, Qingxiang Yin, Yikun Li, Yuanhong Key Laboratory of Modern Power System Simulation and Control and Renewable Energy Technology Ministry of Education Northeast Electric Power University Jilin132012 China Zaozhuang Power Supply Company State Grid Shandong Electric Power Company Zaozhuang277000 China Changchun Institute of Technology ChangChun130012 China

In this paper, an active damping control strategy based on capacitance and voltage feedback is proposed to solve the resonance problem of three-phase LCL inverter grid-connected system. To solve the problem that the parameters of active damping control strategy are complicated and need to be adjusted repeatedly, a parameter design method is proposed in this paper, which is simple to implement and does not need to be adjusted repeatedly. Finally, the effectiveness of the control strategy and parameter design method is verified by experiments. © 2021 Institute of Physics Publishing. All rights reserved.

关键词： Capacitance

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Oscillation Mechanism Analysis of AGC Dynamics Based on Damping Torque Analysis Theory 5

Oscillation Mechanism Analysis of AGC Dynamics Based on Damp...

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5th IEEE International Electrical and Energy Conference, CIEEC 2022

作者： Sun, Jie Zhou, Tao Li, Huifang Li, Yinjie Tang, Haoran Chen, Liufu Nanjing University of Science and Technology School of Automation Nanjing China Key Laboratory of Power System Intelligent Dispatch and Control of Ministry of Education Shandong University Jinan China Huzhou Yueqiu Motor Co. Ltd Research and Development Center Huzhou China Yunnan Electric Power Dispatching Control Center China Southern Power Grid Kunming China State Grid Chongqing Electric Power Research Institute Chongqing China

ISBN: (数字)9781665411042

ISBN: (纸本)9781665411042

Frequency oscillation events take place occasionally in recent years which are strongly related with AGC (automatic generation control) dynamics. In order to investigate the triggering and influence mechanism of AGC oscillations, this paper establishes the multi-area AGC model containing different types of generating units and AGC control types. Then, the oscillation properties and mode identification between AGC and PFR (primary frequency regulation) modes are expounded in detail. On this basis, the DTA (damping torque analysis) theory is studied for frequency stability analysis as it has a clear physical meaning and can reflect oscillation damping characteristics. Then, the model of DTI (damping torque index) is established conduct mode distinguishing and parameter influence analysis. Finally, the effectiveness and feasibility of the proposed method are verified in case studies and some conclusions are drawn from simulation results. © 2022 IEEE.

关键词： Damping

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Sharing Mobilized Energy Storage for Temporal-Spatial Coordination of Transportation and power systems

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Journal of Modern power systems and Clean Energy 2024年第3期13卷 892-903页

作者： Yuhang Ding Xinjiang Chen Guangchun Ruan Gengyin Li Ming Zhou Jiang Dai Jianxiao Wang State Key Laboratory of Alternate Electrical Power System with Renewable Energy Sources North China Electric Power University Beijing China State Grid Hangzhou Lin'an District Power Supply Company Hangzhou China Department of Industrial Engineering and Management College of Engineering Peking University Beijing China Laboratory for Information and Decision Systems Massachusetts Institute of Technology Cambridge MA USA Power Dispatching and Control Center Guizhou Power Grid Company Guiyang China National Engineering Laboratory for Big Data Analysis and Applications Peking University Beijing China

Mobilized energy storage (MES) can provide a variety of services for power systems, including peak shaving, frequency regulation, and congestion alleviation. In this paper, we develop an MES sharing approach based on temporal-spatial network (TSN) toward systemwide temporal-spatial flexibility enhancement, specifically in which the heavy-duty vehicles can exchange batteries at the energy storage stations connected with power grids. To achieve the temporal-spatial coordination of transportation and power systems, we propose a coordinated scheduling model. A decentralized algorithm based on the improved optimality condition decomposition (OCD) algorithm is proposed to address the information asymmetry between transportation and power systems while enhancing computational efficiency. Case studies based on IEEE 30-/118-bus and transportation systems demonstrate that MESs using the proposed approach can significantly improve the utilization of batteries while reducing operating costs by over 40% compared with stationary energy storages (SESs).

关键词： Transportation power systems Batteries Planning Costs power grids Uncertainty

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