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5th IEEE Conference on Energy Internet and Energy system Integration, EI2 2021

作者： Zhu, Yihua Chang, Dongxu Guo, Qi Guo, Hengdao Hu, Binjiang Wu, Mingkang Zhu, Yukun Yu, Duo State Key Laboratory of HVDC Electric Power Research Institute China Southern Power Grid Guangzhou China Guangdong Provincial Key Laboratory of Intelligent Operation 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)9781665434256

Based on the design characteristics of the stability control system, the control strategies of each station in the system are abstracted and integrated, and classified into standardized logic and customized logic. Based on the real-time digital simulation system platform, a three-layer architecture of the real-time simulation platform for the large-scale stability control system is designed. The standardized simulator based on FPGA/DSP and the customized simulator using device virtualization technology are designed in detail. The design scheme of the real-time accurate simulation platform for large-scale stability control system is proposed. From the perspective of hardware requirements, simulation accuracy, and platform adaptability, the differences between the simulation platform and the existing real-time digital simulation test platform are compared and analyzed. © 2021 IEEE

关键词： Simulation platform

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Short-Term Wind power Forecasting Based on Two-Stage Feature Selection

Short-Term Wind Power Forecasting Based on Two-Stage Feature...

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Energy, Electrical and power Engineering (CEEPE), International Conference on

作者： Jie Zheng Zhewen Niu Xiaoqing Han Yuxiang Wu Xiaorui Cui Shanxi Key Laboratory of Power System Operation and Control Taiyuan University of Technology Taiyuan China Institute of Electricity Science Shanxi Province State Grid Electricity Company Taiyuan China

The forecasting of short-term wind power is influenced by complex and changeable factors, such as climate environment, and meteorological characteristics. A single input of model features is difficult to meet the accurate forecasting requirements. However, to consider all the influencing factors, the input feature redundancy will increase the computational complexity of the forecasting model and have a negative impact on the forecasting results. Therefore, accurate and efficient feature selection is the key to improving the accuracy of data-driven wind power forecasting. In this paper, a short-term wind power forecasting method based on two-stage feature selection is proposed. Firstly, the meteorological factors and environmental factors affecting wind power forecasting are screened by using the Pearson Correlation Coefficient method. Secondly, a feature selection method of attention mechanism considering temporal correlation is proposed, which dynamically mined the potential correlation between wind power output and input characteristics from the perspective of time, and independently extracted the information of historical key moments. Finally, a bidirectional gated cyclic neural network (BIGRU) is selected as the forecasting model, taking into account the influence of historical data and future information. The results show that the proposed PCC-TA-BIGRU short-term wind power forecasting model can accurately select the factors affecting wind power forecasting and effectively improve the accuracy of short-term wind power forecasting.

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Study on partial discharge of transformer based on wide frequency equivalent circuit

Study on partial discharge of transformer based on wide freq...

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IEEE International Conference on Energy Internet (ICEI)

作者： Changming Jiang Yuanxiang Zhou Ping Li Yunpeng Tang Zhiyang He Huan Li Jianning Chen Ka Mu North China Branch State Grid Corporation of China Bejing China Department of Electrical Engineering State Key Laboratory of Power System Operation and Control Tsinghua University Bejing China State Grid Corporation of China Bejing China Electric Power Research Institute of State Grid Jibei Electric Power Company Limited Bejing China

ISBN: (数字)9798331523558

ISBN: (纸本)9798331523565

When partial discharge occurs in the transformer, it will produce higher frequency pulse current, high frequency phenomenon will enhance the circuit capacitance effect, making the circuit bandwidth, in order to detect the local discharge signal so as to realize the transformer for equipment monitoring, the establishment of the transformer broadband equivalent circuit model, the propagation law of partial discharge pulse current signal in the transformer is investigated, and the effects of four denoising methods are compared under different evaluation indexes; finally, a typical transformer partial discharge condition is studied, and the validity of the transformer partial discharge research based on the wide-band equivalent circuit is verified.

关键词： Partial discharges Grounding Windings Noise reduction Wavelet packets Frequency measurement Finite element analysis power transformers Integrated circuit modeling Equivalent circuits

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Directional Beamforming for High-Speed Railway Communications with Frequency Offset Precorrection

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Chinese Journal of Electronics 2025年第1期23卷 163-168页

作者： Yuan Cao Yinghong Wen Wei Xu Xin Xie School of Electronics and Information Engineering Beijing Jiaotong University National Engineering Research Center of Rail Transportation Operation and Control System Beijing China State Key Laboratory of Rail Traffic Control and Safety Beijing Jiaotong University Beijing China National Mobile Communications Research Lab. Southeast University Nanjing China

This paper considers a multi-antenna transmission strategy for high speed railway communications. In order to achieve better performance than conventional space-frequency block coding schemes, we propose a directional beamforming strategy for the High-speed railway (HSR) communication by exploiting some characteristic of the railway system including predetermined moving tracks and real-time positioning information. Moreover, for alleviating the effect of Doppler shift due to the moving train, a frequency offset precorrection method is also incorporated with direction beamforming. Theoretical Signal-to-noise ratio (SNR) gain of the proposed beamforming scheme over traditional HSR communication schemes is also derived for illustrating the performance enhancement. Numerical results verify the effectiveness of our proposed scheme even with some kind of imperfect position information available at the transmitter.

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Series-Connected SiC MOSFETs Module with a Single Gate Driver

Series-Connected SiC MOSFETs Module with a Single Gate Drive...

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IEEE Conference on Energy Internet and Energy system Integration (EI2)

作者： Yuxuan Zhang Rui Li Runquan Meng Yuhan Ren Yue Ma Juan Chen Shanxi Key Lab of Power System Operation and Control Taiyuan University of Technology Taiyuan China Electric Power Research Institute of State Grid Shanxi Electric Power Company Taiyuan China

With the continuous development and progress of power electronics technology, the technological innovation of each generation of power semiconductors will have a profound impact on the generation, transmission, conversion and distribution of electrical energy, and has made outstanding contributions to the advancement of human civilization and economic and social development. In recent years, a new generation of wide-bandgap semiconductor power devices has developed vigorously, and new material switching devices such as SiC and GaN MOSFET have entered people's field of vision, which has brought new historical opportunities for the performance improvement of power electronic equipment, as well as new challenges. This paper presents a series-connected SiC MOSFET switching module topology with a single gate driver. Then, the working principle including static state and switching transition is analyzed. The LTspice simulations in the third section validate the analysis and show the usability of the series-connected SiC MOSFET stack topology using a single gate driver.

关键词： MOSFET Technological innovation Silicon carbide Switches system integration Logic gates Gate drivers

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A Protection Scheme for Low Voltage DC Distribution system Based on control and Protection Cooperation

A Protection Scheme for Low Voltage DC Distribution System B...

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Smart power & Internet Energy systems (SPIES), International Conference on

作者： Qiang Liu Shengwen Li Runquan Meng Jingchong Huo Shaozhe Jiang Ruishu Li Shanxi Key Lab of Power System Operation and Control Taiyuan University of Technology Taiyuan China Electric Power Research Institute of State Grid Shanxi Electric Power Company Taiyuan China

When a short circuit fault occurs in the DC distribution system, the fault current rises quickly and has a high amplitude, which requires high performance of the protection equipment. At present, the protection scheme of DC distribution system mainly depends on the DC circuit breaker at both ends of the line, but the DC circuit breaker technology is not mature and the cost is high. Based on the above background, a protection scheme of low-voltage DC distribution system based on control and protection cooperation is proposed. By changing the system topology and cooperating with the implementation of the protection scheme, it can meet the protection reliability and rapidity, reduce the operation cost, and quickly restore the power supply after cutting off the fault, so as to realize the short-term fault traversal. Finally, the system model is built on the Matlab/Simulink simulation platform to verify the effectiveness of the protection scheme.

关键词： Low voltage Costs power supplies Circuit breakers control systems Topology Circuit faults

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Grid-forming control of VSC-HVDC systems Connecting Asynchronous power Grids

Grid-forming Control of VSC-HVDC Systems Connecting Asynchro...

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power system and Green Energy Conference (PSGEC)

作者： Mingqun Liu Guanming Zeng Xin He Liang Tu Peng He Yihua Zhu Electric Power Research Institute Yunnan Power Grid Co. Ltd. Kunming State Key Laboratory of HVDC Electric Power Research Institute China Southern Power Grid National Energy Power Grid Technology R&D Centre Guangzhou China Guangdong Provincial Key Laboratory of Intelligent Operation and Control for New Energy Power System CSG Key Laboratory for Power System Simulation Electric Power Research Institute China Southern Power Grid Guangzhou China State Key Laboratory of HVDC Electric Power Research Institute China Southern Power Grid CSG Key Laboratory for Power System Simulation Electric Power Research Institute China Southern Power Grid Guangzhou China

ISBN: (数字)9798350365573

ISBN: (纸本)9798350365580

Interconnecting asynchronous power grids with the VSC-HVDC transmission is an important trend. To enhance the weak grid operation performance and grid frequency response capability of the VSC-HVDC system, a novel grid-forming without using the phase-locked-loop is applied in both ends of the VSC-HVDC system. The DC voltage-Active power droop-based grid-synchronization method is utilized. With the proposed method, the sending and the receiving end MMCs perform like a synchronous motor and a synchronous generator, respectively. When the frequency changes in either grid, the system can automatically response to it and change the active power transmission by VSC-HVDC to achieve primary frequency regulation and active frequency support. Finally, the validity of the dual-end grid-forming control is verified based on the simulations in PSCAD/EMTDC.

关键词： power transmission control systems Synchronous motors Market research power grids Synchronous generators Synchronization Phase locked loops Frequency control Grid forming

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The staged optimal scheduling method for a multi-source industrial park with wind, solar, thermal, and energy storage 3

The staged optimal scheduling method for a multi-source indu...

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3rd International Conference on Smart Energy and Electrical Engineering, SEEE 2024

作者： Hao, Ling Xu, Hui Tan, Zhenlong Zheng, Zhibao Xu, Fei Yang, Ruixuan Xu, Zhenyu Dai, Xuhui State Key Laboratory of Power System Operation and Control Department of Electrical Engineering Tsinghua University Beijing100084 China Co. Ltd. Beijing101199 China School of Economics and Management Tsinghua University Beijing100084 China State Key Laboratory of Power Transmission Equipment Technology Chongqing University Chongqing400044 China

The increase in the proportion of renewable energy generation capacity has placed significant pressure on thermal power operations. Constructing energy storage facilities within the metering output of thermal power plants, allowing them to participate in peak load regulation with generating units jointly, is one effective way to alleviate the operational pressure on thermal power. To achieve comprehensive scheduling of thermal power plants with energy storage, this paper first establishes an overall output model for the coupling operation of thermal power and energy storage. Secondly, a staged optimal scheduling method for a multi-source industrial park with wind, solar, thermal, and energy storage is proposed to solve the optimization scheduling problem for the industrial park involving thermal power plants with energy storage participation. Finally, the simulation results based on a specific regional power grid in Inner Mongolia validate the feasibility of the proposed method. © 2025 Institute of Physics Publishing. All rights reserved.

关键词： Thermoelectric power plants

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Network-Constrained Unit Commitment with Flexible Temporal Resolution

arXiv

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arXiv 2024年

作者： Yu, Zekuan Zhong, Haiwang Ruan, Guangchun Yan, Xinfei The State Key Laboratory of Power System Operation and Control Dept. of Electrical Engineering Tsinghua University Beijing China The Sichuan Energy Internet Research Institute Tsinghua University China The Lab for Information & Decision Systems Massachusetts Institute of Technology Massachusetts United States

Modern network-constrained unit commitment (NCUC) bears a heavy computational burden due to the ever-growing model scale. This situation becomes more challenging when detailed operational characteristics, complicated constraints, and multiple objectives are considered. We propose a novel simplification method to determine the flexible temporal resolution for acceleration and near-optimal solutions. The flexible temporal resolution is determined by analyzing the impact on generators in each adaptive time period with awareness of congestion effects. Additionally, multiple improvements are employed on the existing NCUC model compatible with flexible temporal resolution to reduce the number of integer variables while preserving the original features. A case study using the IEEE 118-bus and the Polish 2736-bus systems verifies that the proposed method achieves substantial acceleration with low cost variation and high accuracy. Copyright © 2024, The Authors. All rights reserved.

关键词： Energy management

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Optimal scheduling of the electrolytic aluminium industrial park participating in flexible ramp products

Optimal scheduling of the electrolytic aluminium industrial ...

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4th Energy Conversion and Economics Annual Forum (ECE Forum 2024)

作者： Yaofei Sun Liang Han Yinxiao Li State Key Laboratory of Power System Operation and Control Department of Electrical Engineering Tsinghua University Beijing People's Republic of China North China Branch State Grid Co. Ltd. Beijing People's Republic of China

ISBN: (数字)9781837242924

The integration of renewable energy sources (RES) into the power system has surged, posing significant challenges due to their inherent volatility and unpredictability. This paper examines the economic feasibility of electrolytic aluminium indust rial parks (EAIPs) participating in flexible ramping products (FRP) to enhance power system flexibility and improve economic benefits. We model the EAIP as a whole, detailing the flexible adjustment capabilities of electrolytic aluminium load (EAL) and establishing a two-stage operation model comprising Day-ahead (DA) and intraday planning. The DA model minimizes daily operational costs by determining electricity purchases and FRP participation based on forecast information, while the intraday model flexibly adjusts load power to accommodate real-time fluctuations in RES generation and FRP prices. The case study demonstrates that EAIPs can effectively reduce energy market purchase costs and increase FRP market revenue through power adjustment capabilities. Compared to operating without considering power regulation or FRP, the total expenditure in the case that includes both is reduced by 1.0%. The results highlight the potential of EAIPs to contribute to grid flexibility and economic efficiency in the context of RES penetration.

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