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检索条件"机构=Key Laboratory of Intelligent Dispatching and Control of Power Grid"

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Two-Timescale Rolling Dispatch of RCs and MESSs During Distribution System Restoration

Two-Timescale Rolling Dispatch of RCs and MESSs During Distr...

引用

IEEE International Conference on power and Energy Applications (ICPEA)

作者： Ruifeng Zhao Wenxin Guo Jiangang Lu Min Zhao Jiaxu Du Electric Power Dispatching and Control Center of Guangdong Power Grid Co. Ltd Guangzhou China Key Laboratory of Smart Grid of Ministry of Education Tianjin University Tianjin China

ISBN: (数字)9798350356113

ISBN: (纸本)9798350356120

To repair distribution networks damaged by hurricanes, mobile energy storage systems (MESSs), wind energy, and repair collaborates (RCs) are typically arranged. But still, hurricanes can continue to cause damage during restoration, leading to new faults and interruptions in wind power. To address these issues, this paper introduces a two-stage rolling dispatch method across two timescales, taking into account the different response speeds of vehicle scheduling and system operations. Over an extended period, the scheduling of MESSs and RCs vehicles is optimized by the use of rolling optimization framework in the first-stage model to handle following faults, and projected wind speeds and load needs. Distributed generators (DGs) and MESS output decisions are made with real-time value on a short timescale. To make solving the nonlinear wind power cut-off model easier, it is also converted into a mixed-integer linear programming form. The approach is validated using the modified IEEE-69 distribution network. Results show that this approach effectively coordinates resources, reduces load loss, and improves system resilience to wind power cut-offs and faults during hurricanes.

关键词： Fault tolerance Distribution networks Wind power generation Maintenance engineering Hurricanes Real-time systems Mixed integer linear programming Optimization Load modeling Energy storage

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Resilience Enhancement Dispatch Method for Distribution Systems Before, During and After Hurricanes

Resilience Enhancement Dispatch Method for Distribution Syst...

引用

Asia Conference on Energy and Environment Engineering (ACEEE)

作者： Ruifeng Zhao Jiangang Lu Haobin Li Chen Wang Hao Wu Kai Hou Electric Power Dispatching and Control Center of Guangdong Power Grid Co. Ltd Guangzhou China Key Laboratory of Smart Grid of Ministry of Education Tianjin University Tianjin China

ISBN: (数字)9798350350241

ISBN: (纸本)9798350350258

The resilience of distribution system requires to be enhanced to defense hurricanes. However, the existing studies only coordinate the proactive and restoration measure before and after hurricanes, neglecting the resilient operation during hurricanes. Thus, this paper proposes a novel three-stage resilient dispatch model to enhance the resilience of distribution systems. Before hurricanes, mobile emergency generators (MEGs) pre-positioning and proactive islanding schemes are optimized as preparedness measures. During hurricanes, faults isolation by remote-controlled switches (RCSs) and wind power cut-off is considered to improve the survivability of loads. After hurricanes, MEGs re-allocation and faults isolation by manual switches (MSs) are co-optimized to boost the restoration of distribution system. Considering uncertainties of wind power cut-off and line faults, the proposed method is established in a three-stage stochastic dispatching model. Finally, the effectiveness of the novel resilient dispatch model against hurricanes is verified in modified IEEE 33-bus distribution system.

关键词： Fault tolerance Uncertainty Islanding Stochastic processes Manuals Wind power generation Hurricanes

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Probability Ordered Tree-Based Contingency Screening Method for power grids

Probability Ordered Tree-Based Contingency Screening Method ...

引用

Asia Conference on Energy and Environment Engineering (ACEEE)

作者： Haobin Li Yue Dai Tian Lan Qian Li Ruifeng Zhao Hao Wu Electric Power Dispatching and Control Center of Guangdong Power Grid Co. Ltd Guangzhou China Key Laboratory of Smart Grid of Ministry of Education Tianjin University Tianjin China

ISBN: (数字)9798350350241

ISBN: (纸本)9798350350258

Contingency screening to generate the expected fault set is important for the power grid reliability evaluation. However, most existing screening methods are not efficient enough, and they may omit some high-frequency contingencies caused by high-order faults, which would impact the accuracy of reliability evaluation. Therefore, based on the probability distance and probability-ordered tree, this paper proposes a novel contingency screening method. The simulation results of RBTS and RTS79 show that, compared with the traditional sorting method, the algorithmic complexity of the proposed method is independent of system size and has higher efficiency.

关键词： Accuracy Simulation Contingency management Transforms power grids Real-time systems Complexity theory

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Coordinated Restoration of Transmission and Distribution Systems with RCs and MEGs

Coordinated Restoration of Transmission and Distribution Sys...

引用

Asia Conference on Energy and Environment Engineering (ACEEE)

作者： Wenxin Guo Jiangang Lu Ruifeng Zhao Qian Li Hao Wu Kai Hou Electric Power Dispatching and Control Center of Guangdong Power Grid Co. Ltd Guangzhou China Key Laboratory of Smart Grid of Ministry of Education Tianjin University Tianjin China

ISBN: (数字)9798350350241

ISBN: (纸本)9798350350258

Coordinated restoration of transmission systems (TSs) and distribution systems (DSs) is necessary to reduce load loss after blackouts. Traditional coordination strategies are studied based on the hypothesis of no faults, neglecting fault repairs. To address this issue, a novel coordination method is proposed to integrate the repair and restoration of a coupled TS and DS with repair crews (RCs) and mobile emergency generators (MEGs) during post-disaster repair. Combining fault repairs and generator restarts by RCs and MEGs, a four-stage parallel restoration model is developed to coordinate dynamic partitioning, generation start-up, transmission path energization and load restoration, which facilitates rapid restoration of coupled TS and DS. Finally, the proposed method is validated on T14-D13 systems. The simulation results show that the proposed approach can effectively increase load recovery in the coupled TS and DS during post-disaster repair.

关键词： Electrical engineering Simulation Asia Life estimation Maintenance engineering Propagation losses Generators

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Energy Storage Participation in Peak Shaving Market Operation Strategy Based on System Supply and Demand Margin 11

Energy Storage Participation in Peak Shaving Market Operatio...

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11th China International Conference on Electricity Distribution, CICED 2024

作者： Qi, Houyu Zhang, Haibo Huang, Songtao Shang, Guozheng Duan, Rui North China Electric Power University Beijing State Key Laboratory of Alternate Electrical Power System with Renewable Energy Sources Beijing102206 China State Grid Inner Mongolia Eastern Electric Power Co. Ltd. Dispatching Control Center Hohhot010010 China The State Key Lab of New Energy Power System Department of Electrical Engineering North China Electric Power University Beijing102206 China

ISBN: (纸本)9798350368345

Existing energy storage operation strategies take renewable energy unit consumption as the main goal, and often operate in conjunction with renewable energy projects, resulting in low energy storage utilization rate and insufficient driving force for energy storage operators to develop independent energy storage. However, with the implementation of independent energy storage operation support policies, the regional peak shaving service market gradually expands to include energy storage. Energy storage can have a positive impact on the economy of the power system as well as its utilization rate. According to the historical East Inner Mongolia power grid operational data, this paper established the annual chronological operation simulation model of peak shaving market participation by energy storage. By analyzing and summarizing the results of energy storage operation state obtained from the annual operation simulation, the energy storage operation strategy of taking part in peak shaving market based on system supply and demand margin was proposed. The two charge and two discharge or three charge and two discharge strategy, which are the most common operation modes of operation simulation, are compared with the proposed operation strategy. It is evident that energy storage's involvement in system peak shaving can lessen thermal units' peak shaving pressure, enhance the benefits of energy storage as a market participant for auxiliary services and the system's overall efficiency in terms of electricity consumption. © 2024 IEEE.

关键词： Charge storage

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Vacuum DC Surface Flashover Characteristic of Polyimide Under Electron Beam Irradiation 17th

Vacuum DC Surface Flashover Characteristic of Polyimide Unde...

引用

17th Annual Conference of China Electrotechnical Society, CES 2022

作者： Pan, Shaoming Zeng, Jia Su, Yi Li, Dajian Rao, Xiajin Han, Fangyuan Zhang, Wei Guangxi Key Laboratory of Intelligent Control and Maintenance of Power Equipment Electric Power Research Institute of Guangxi Power Grid Co. Ltd. Guangxi Nanning530023 China Guangxi Power Grid Co. Ltd. Guangxi Nanning530023 China State Key Laboratory of Electrical Insulation and Power Equipment School of Electrical Engineering Xi’an Jiaotong University Shaanxi Xi’an710049 China

ISBN: (纸本)9789819904075

The DC flashover voltage of a solid dielectric in vacuum is much lower than the breakdown voltage of a vacuum gap or the solid dielectric itself of the same size. On the spacecraft, since the presence of energetic electron radiation, the DC surface flashover voltage of a solid dielectric is even much lower than that without radiation, which threatens the development of high-voltage and high-power spacecraft. However, the vacuum DC surface flashover characteristics and mechanism radiated by electron beam are still unclear. Therefore, it is of great significance for the development of high-power spacecraft to reveal the mechanism of vacuum DC surface flashover of dielectric materials under electron beam radiation. In this paper, the vacuum DC surface flashover characteristics of polyimide under continuous electron beam radiation and after radiation cessation with different beam densities are studied. © 2023, Beijing Paike Culture Commu. Co., Ltd.

关键词： Polyimides

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Self-organizing Network of Self-energy Sensors for Transmission Line Status Monitoring 4

Self-organizing Network of Self-energy Sensors for Transmiss...

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4th International Conference on Advances in Electrical Engineering and Computer Applications, AEECA 2023

作者： Feng, Bo Zhang, Wei Xia, Xiaofei Tang, Jie Liu, Peng Guangxi Key Laboratory of Intelligent Control and Operation and Maintenance of Power Equipment Electric Power Research Institute of Guangxi Power Grid Co. Ltd. Guangxi Nanning China Guangxi Power Grid Equipment Monitoring and Diagnosis Engineering Technology Research Center Electric Power Research Institute of Guangxi Power Grid Co. Ltd. Guangxi Nanning China Guagnxi Power Grid Co. Guangxi Nanning China

ISBN: (纸本)9798350308082

Transmission line condition monitoring sensor network is large in scale and difficult to maintain. Its long chain network topology is different from that of general wireless sensor networks. It is necessary to develop a self-organizing sensor network with self-energy harvesting. In this regard, a three-layer network model is designed. Three types of node models are constructed. The sensor nodes implement round-robin sleep/wake and energy management mechanisms, powered by self-harvested energy. Additionally, reliable routing between nodes is established. Simulation results show that the developed simulation model is suitable for the application of transmission line condition monitoring. The expected functions of each module have been basically realized, and the stable and reliable transmission of perceived data of key components of transmission lines has been achieved, thereby providing technical and data basis for the deployment of practical networks. © 2023 IEEE.

关键词： Electric lines

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An Optimal dispatching Model for Interconnected power grid Based on Security Region

An Optimal Dispatching Model for Interconnected Power Grid B...

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Smart Electrical grid and Renewable Energy (SEGRE), International Conference on

作者： Bao Li Qian Ma Hefeng Zhai Xin Zhou Yuan Zeng Junzhi Ren China Southern Power Grid Power Dispatching Control Center China Key Laboratory of Smart Grid of Ministry of Education Tianjin University Tianjin China

With the construction of new power systems, more and more new energy is connected to the power grid, and at the same time, the connections between regional power grids are becoming increasingly close. However, the regulation and operation of power grids between different regions are relatively independent, making it difficult to solve them using a unified optimization approach. Therefore, this article aims to propose a multi region power grid coordination optimization model based on security region, equating each regional power grid into a low dimensional model that can be directly dispatched. On the one hand, it can reduce the scale of problem solving, and on the other hand, it conforms to the interactive mechanism of actual scheduling. Finally, validation was conducted on a standard example system. The results of the example show that it can meet the effectiveness of the calculation, greatly reduce the complexity of the problem, and improve computational efficiency.

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A Data Storage Method of intelligent Substation Based on Physical Model

A Data Storage Method of Intelligent Substation Based on Phy...

引用

power Energy Systems and Applications (ICoPESA), International Conference on

作者： Shidan Liu Qian Tan Jianglei Suo Xiaowa Chen Shaolin Jiao Feng Wang Yiquan Li Qianshuo Gu Power Dispatching Control Center Guangdong Power Guangzhou China Key Laboratory of Power System Intelligent Dispatch and Control Shangdong University Jinan China

In view of the sharp increase in the amount of data in intelligent substations at present, the gap between the data transmission mode and the data storage mode is large, resulting in the problem of low data storage efficiency. This paper presents a data storage method of intelligent substation based on physical model. Firstly, this paper analyzes the data transmission mode of IEC 61850, introduces the object-oriented modeling technology of IEC 61850, the relationship between various configuration files, and the tree structure of the transmitted data. Then, this paper introduces the concept, structure and characteristics of the physical model. Build a physical model of the device based on the CID (Configured IED Description) file of the device, and form a device self-describing JSON file. After then, according to the characteristics of each service in the physical model, this paper uses different types of databases to store the data under this service. Finally, this paper develops and applies the method, and completes the back-to-back data storage model of a substation equipment. The experimental results show that the functional requirements and performance indicators of the developed substation data storage method can achieve the desired goals and effectively improve the efficiency of data storage.

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Research on Typical Fault Diagnosis Method for Overhead Lines Based on Transient Fault Wave of Ground Potential Terminal 10

Research on Typical Fault Diagnosis Method for Overhead Line...

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10th International Forum on Electrical Engineering and Automation, IFEEA 2023

作者： Huang, Zhidu Ouyang, Jianna Li, Shan Zhang, Longfei Liu, Yinglong Li, Shengdong Chen, Yajuan Cui, Zhimei Feng, Yubin Electric Power Research Institute of Guangxi Power Grid Co. Ltd. Nanning China Guangxi Key Laboratory of Intelligent Control and Maintenance of Power Equipment. Nanning China Nanning Power Supply Bureau of Guangxi Power Grid Co. Ltd. Nanning China Beihai Power Supply Bureau of Guangxi Power Grid Co. Ltd. Beihai China

ISBN: (纸本)9798350309379

In view of the fault characteristics of overhead transmission lines, this paper focuses on the characteristics of typical tripping faults in overhead transmission lines, studies the characteristics of transient current and transient fault signal parameters when transmission towers enter the ground during faults, analyzes the collection of transient fault signals through ground potential terminal and segmented method, and develops a transient fault signal monitoring device for collecting transient fault signals from the ground potential terminal of transmission line towers, in order to timely obtain the fault electrical signals sent out by the fault point, Analyze the changes and attenuation patterns of fault wave propagation on overhead transmission line conductors, and improve the reliability and accuracy of fault signal acquisition for transmission line towers entering the ground. To verify the accuracy of the method, a series of simulations and real type experiments were conducted, and the results showed that the segmented overhead line fault location method based on the electric potential terminal has higher accuracy and accuracy compared to traditional methods. It can be used for on-site overhead transmission line applications, improving the accuracy of fault location and fault type diagnosis. © 2023 IEEE.

关键词： fault location ground level terminals Overhead transmission lines segmented signal monitoring transient waves

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