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4th IEEE Conference on Energy Internet and Energy System Integration, EI2 2020

作者： Li, Long Li, Zhenwen Liu, Ying Xiao, Zhenfeng Cai, Ye Liu, Fang Hunan Electric Power Company Dispatch Control Center State Grid Corporation Changsha China Changsha University of Science and Technology School of Electrical and Information Engineering Changsha China Hunan Electric Power Company Limited Economic Technical Research Institute Hunan Key Laboratory of Energy Internet Supply-demand and Operation Changsha China

ISBN: (纸本)9781728196060

With the continuous integration of the power grid and the information network, the vulnerability analysis of cyber-physical system considering the interaction between networks become more important. Based on the complex network theory, a topology model of power cyber-physical network is established, and improved structural entropy is proposed, which considering node differences, edge differences, and node dependency differences. Taking the Hunan Electric power Cyber-Physical System as an example, the simulation results show that the improved structural entropy can identify important nodes in the power grid. the dependent network is more vulnerable than a single network, nodes with high-degree and high-betweenness play a key role in maintaining the operation of the system, and the robustness of system will also be reduced when a few nodes with low-degree and low-betweenness fail. © 2020 IEEE.

关键词： Cyber Physical System

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Function and Dynamic Performance Test of MVIP HVDC control and protection System

Function and Dynamic Performance Test of MVIP HVDC Control a...

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HVDC (HVDC), International Conference on

作者： Ou Kaijian State Key Laboratory of HVDC Electric Power Research Institute 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: (数字)9781728175935

ISBN: (纸本)9781728175942

FPT/DPT (Functional Performance Tests and Dynamic Performance Tests) is a key process in HVDC project. The simulation and testing system included RTDS(Real-Time Digital Simulator) and C&P(control and protection) cubicles of MVIP HVDC project is set up. Based on this simulation and testing system, the function and dynamic performance of MVIP HVDC C&P system are tested. Totally 32 test groups and more than 400 test items are included in the testing matrix. The C&P software is optimized and improved during the test. Two typical test cases, i.e. low power start-up and power reversal, are introduced in this paper.

关键词： HVDC transmission Testing power system dynamics Workstations Software Optical filters Steady-state

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Distributionally Multi-level Co-optimization Dispatch Considering Primary and Secondary Frequency Regulation

Distributionally Multi-level Co-optimization Dispatch Consid...

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2020 IEEE/IAS Industrial and Commercial power System Asia, I and CPS Asia 2020

作者： Ji, Xingquan Zhang, Yumin Ye, Pingfeng Han, Xueshan Xu, Bo Yin, Ziyang Shandong University of Science and Technology College of Electrical Engineering and Automation Qingdao China Shandong University Key Laboratory of Power System Intelligent Dispatch and Control of Ministry of Education Jinan China State Grid Energy Research Institute Co. Beijing China

ISBN: (纸本)9781728143033

Distributed energy resource (DER) including wind power, solar energy and energy storage system (ESS) are connected to the active distribution network (ADN) in various combination ways, which makes the distribution network have interaction. As a bridge connecting the transmission grid (TG) and micro grid (MG), ADN breaks the traditional operation pattern of TG+ADN+MG. Considering the physical connections and shared information among TG, ADN and MG, this paper proposes a decentralized and parallel analytical target cascading (ATC) algorithm for TG+ADN+MG multi-level co-optimization dispatch considering primary and secondary frequency regulation. To explore the synergistic ability of the TG+ADN+MG coping with uncertainties of DER, i.e., wind power, the primary and secondary frequency regulation of TG are implemented to cope with uncertainties. Furthermore, the distributional uncertainties of wind power and load are well modeled by data driven, which is proposed in our previous work [1]. An improved 6-bus system is used to test the proposed model, the numerical results illustrate the effectiveness and efficiency of the proposed method. © 2020 IEEE.

关键词： Wind power

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A Deep Learning Based Real-time Load Forecasting Method in Electricity Spot Market

A Deep Learning Based Real-time Load Forecasting Method in E...

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2018计算机科学与工程技术国际研讨会

作者： Qipei Zhang Jixiang Lu Zhihong Yang Mengfu Tu Nari technology co ltd. State Key Laboratory of Intelligent power grid protection and operation control

This paper analyzes the potential influence in Chinese electricity market due to the reform and access of the electricity spot market. On this occasion, a deep learning based model for load forecasting is proposed to improve the market operator's precise scheduling level and assist power retailers in managing bid strategies. LongShort Term Memory(LSTM) unit is used to modeling, which is one of the most popular techniques of deep learning. In addition, historical power load data and meteorological data of Suzhou and Lianyungang in China from January 2015 to December 2017 are used for the study to training and evaluate forecasting model. As a result, this paper shows the compare results with exiting machine algorithm for load forecasting.

关键词： A Deep Learning Based Real-time Load Forecasting Method in Electricity Spot Market

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Maintenance Optimization for Combined Heat and power Unit Based on Opportunistic Maintenance Strategy

Maintenance Optimization for Combined Heat and Power Unit Ba...

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2020 IEEE/IAS Industrial and Commercial power System Asia, I and CPS Asia 2020

作者： Zhang, Yumin Ji, Xingquan Yu, Yixiao Xu, Bo Han, Xueshan Zhang, Lin Shandong University of Science and Technology College of Electrical Engineering and Automation Qingdao China Shandong University Key Laboratory of Power System Intelligent Dispatch and Control of Ministry of Education Jinan China State Grid Energy Research Institute Co. Beijing102209 China

ISBN: (纸本)9781728143033

Integrated energy system is composed of different multiple energy systems. When the combined heat and power (CHP) unit fails, more than one energy systems can be influenced. Therefore, it is very important to improve the reliability of CHP unit. In this paper, we propose a maintenance decision making model for CHP unit based on opportunistic maintenance strategy. Firstly, the expression of the availability of CHP unit considering opportunistic maintenance is derived. And then, in order to quantify the impact of different maintenance strategies on system operation, system operation risk is given taking electrical load loss and thermal load loss into account. Finally, maintenance decision making model of the CHP unit is established with maintenance constraints. Case studies show that the model can optimize maintenance strategies and improve the reliability of CHP unit and the overall system efficiency. © 2020 IEEE.

关键词： Decision making

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Feasibility Analysis of Single-end Equivalent Modeling to LCC-HVDC Transimission System

Feasibility Analysis of Single-end Equivalent Modeling to LC...

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

作者： Bin Wang Zhizhong Li Qi Guo Zhijiang Liu Shuyong Li Liu Cui Tsinghua University Beijing China Guangdong Provincial Key Laboratory of Intelligent Operation and Control for New Energy Power System State Key Laboratory of HVDC (Electric Power Research Institute China Southern Power Grid) Guangzhou China National Energy Power Grid Technology R&D Centre State Key Laboratory of HVDC (Electric Power Research Institute China Southern Power Grid) Guangzhou China China Southern Power Grid State Key Laboratory of HVDC (Electric Power Research Institute China Southern Power Grid) CSG Key Laboratory for Power System Simulation Electric Power Research Institute Guangzhou China

ISBN: (数字)9781728196060

ISBN: (纸本)9781728196077

The commutation failures seriously threaten the safe operation of hybrid AC/DC grid. Considering that commutation failure occurs only on the inverter side, it is very important to study the voltage controlled current source model of LCC HVDC single terminal measurement information with high equivalent accuracy, which is very important for the practicality of real-time electromagnetic transient simulation of LCC HVDC dynamic phasor model. In order to this problem, this paper further discusses the single terminal equivalent model of LCC HVDC system which does not depend on the measurement information of DC sending end AC system, and explores the estimation method of single terminal fast transient response of complex AC/DC coupling faults induced by AC side fault of LCC HVDC inverter station and participation of DC control separation. The error distribution of single terminal equivalent calculation is quantitatively analyzed to lay a foundation for the follow-up protection and control technology research.

关键词： Analytical models Solid modeling Voltage measurement HVDC transmission Estimation Inverters Voltage control

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Study on low-carbon electricity consumption strategy for photovoltaic power generation wastewater plant based on convolutional neural network

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Renewable Energy 2025年 253卷

作者： Qing Shao Yiyi Yi Chaojing Li Junjun Liu Yuxiang Xie Qingwu Gong Zizheng Liu Yiqun Chen School of Civil Engineering Wuhan University Wuhan 430072 China State Key Laboratory of Power Grid Environmental Protection Hubei Engineering and Technology Research Center for AC/DC Intelligent Distribution Network School of Electrical Engineering and Automation Wuhan University Wuhan 430072 China

Wastewater treatment plants (WWTPs) are significant electricity consumers, leading to substantial energy use and carbon emissions. In response to China's “dual carbon” goal, photovoltaic power generation systems are increasingly adopted in WWTPs for their economic and environmental advantages. However, photovoltaic power is highly weather-dependent and unstable. This paper proposes a low-carbon electricity consumption strategy for WWTPs with photovoltaic systems by optimizing blower power scheduling to maximize photovoltaic use and reduce electricity costs while ensuring effluent quality. An anaerobic-anoxic-oxic (AAO) WWTP in Wuhan City served as a case study. A water quality simulation model was established using GPS-X, and the photovoltaic system was designed and assessed using PVsyst. Then, the models for water quality, photovoltaic power generation, and electricity pricing were integrated to adjust blower power consumption, forming a set of low-carbon strategy. The strategy sample set was input into the convolutional neural network (CNN) model, which accurately predicted dispatch strategies, achieving a recall and accuracy rates above 85 %. Analysis of the September 2019 operation data indicates that this strategy can yield an additional 10.1 % savings on the WWTP's electricity bill. This approach provides a reference for low-carbon power management in other wastewater plants with photovoltaic systems and promotes effective system integration.

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Fault diagnosis method for ship power-system DC–DC converter using augmented WPD and multi-branch CNN-BiLSTM network

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Journal of the Franklin Institute 2025年第9期362卷

作者： Ren, Yuanjie Zhang, Lanyong Shi, Peng Peng, Huimin College of Intelligent Systems Science and Engineering Harbin Engineering University Harbin150001 China School of Electrical and Mechanical Engineering The University of Adelaide SA5000 Australia State Key Laboratory of Smart Grid Protection and Control Nari Group Corporation Jiangsu Nanjing211106 China

Direct current (DC) –DC converters are indispensable energy conversion devices in medium-voltage DC power systems of ships. Herein, the fault diagnosis problem of bidirectional DC–DC converters is investigated. Considering that the fault diagnosis of bidirectional DC–DC converters requires the effective combination of information from multiple diagnostic signals and differences in characteristic data in different time scales, a parallel stacking of multiple branches based on enhanced wavelet packet decomposition technology is proposed as a hybrid model of a convolutional neural network and bidirectional long short-term memory network. First, a multi-input method is used to extract effective features in the sequence data. Second, a multi-model fusion processing framework is used to perform fault diagnosis analysis on the DC–DC converter. Finally, the squeeze and excitation attention mechanism is used to weight all types of fault features and adaptively obtain them. The important weights of the classification feature maps learned by different branches generate fault classification results. Experimental results reveal that the proposed method can extract highly discriminative features from raw data and exhibits robustness in noisy environments. © 2025 The Franklin Institute

关键词： Convolutional neural networks

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Study on Regional power grid Stability of Large Scale Wind power Based on Wind Farm Detailed Model 3

Study on Regional Power Grid Stability of Large Scale Wind P...

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3rd IEEE Advanced Information Management, Communicates, Electronic and Automation control Conference, IMCEC 2019

作者： Ting, Huang Daoshan, Huang Yan, Li Zhenhua, Xu Weijun, Zhang Yan, Lin State Grid Fujian Electric Power Company Electric Power Research Institute Fuzhou Fujian China State Key Laboratory of Operation and Control of Renewable Energy Storage Systems Beijing China

ISBN: (纸本)9781728105130

Wind power generation systems include slow-changing mechanical systems such as wind turbines and drivelines, as well as fast-changing power electronic controls and protection of electrical systems such as surveys, hybrid systems with multiple time scales. It is very important to develop the transient model of wind power with high accuracy to meet the stability analysis of power system as much as possible to meet the actual operating characteristics of wind turbine. This paper focuses on the need of system stability analysis after large-scale wind power integration. Based on the accurate reflection of the failure-tracing wind farm model of wind turbine under grid fault, this paper evaluates the system security and stability after a large number of wind power grid-connected. © 2019 IEEE.

关键词： Wind turbines

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A security scheme for intelligent substation communications considering real-time performance

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Journal of Modern power Systems and Clean Energy 2019年第4期7卷 948-961页

作者： Jie ZHANG Jun’e LI Xiong CHEN Ming NI Ting WANG Jianbo LUO Key Laboratory of Aerospace Information Security and Trusted Computing Ministry of EducationSchool of Cyber Science and EngineeringWuhan UniversityWuhan 430072China NARI Group Corporation(State Grid Electric Power Research Institute) Nanjing 211106China NARI Technology Co.Ltd. Nanjing 211106China State Key Laboratory of Smart Grid Protection and Control Nanjing 211106China

Tampering,forgery and theft of the measurement and control messages in a smart grid could cause one breakdown in the power ***,no security measures are employed for communications in intelligent *** services in an intelligent substation have high demands for real-time performance,which must be considered when deploying security *** paper studies the security requirements of communication services in intelligent substations,analyzes the security capabilities and shortages of IEC 62351,and proposes a novel security scheme for intelligent substation *** security scheme covers internal and telecontrol communications,in which the real-time performance of each security measure is *** this scheme,certificateless public key cryptography(CLPKC)is used to avoid the latency of certificate exchange in certificate-based cryptosystem and the problem of key escrow in identity-based cryptosystem;the security measures of generic object-oriented substation event,sampled measure value and manufacturing message specification in IEC 62351 are improved to meet the real-time requirements of the messages as well as to provide new security features to resist repudiation and replay attacks;and the security at transport layer is modified to fit CLPKC,which implements mutual authentication by exchanging ***,a deployment of CLPKC in an intelligent substation is *** also evaluate the security properties of the scheme and analyze the end-to-end delays of secured services by combining theoretical calculation and simulation in this *** results indicate that the proposed scheme meets the requirements of security and real-time performance of communications in intelligent substations.

关键词： intelligent substation Security measures Certificateless public key cryptography(CLPKC) Real-time communication IEC 62351

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