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检索条件"机构=the Key Laboratory of Power System Intelligent Dispatch and Control"

共 1149 条记录，以下是81-90 订阅

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Short-Term Load Forecastiong Based on Residual Graph Convolutional Neural Network

Short-Term Load Forecastiong Based on Residual Graph Convolu...

引用

2023 International Conference on power system Technology, powerCon 2023

作者： Bian, Mengqing Chu, Xiaodong Ye, Hua Intelligent Dispatch and Control of Ministry of Education Shandong University Key Laboratory of Power System Jinan China

ISBN: (纸本)9798350300222

As various industries experiencing post-pandemic economic recovery, power systems face increased challenges. Short-term power load forecasting for regional power grids can assist in anticipating load fluctuations and optimizing power system management planning. This paper tackles the gradient vanishing issue in deep graph convolutional neural networks (GCNs) by incorporating a residual module to create a residual graph convolutional neural network (ResGCN). Data from a regional power grid in the United States is utilized for validation purposes. Experimental results show that the graph convolutional neural network with the residual module generates predictions closer to the actual values, consequently enhancing prediction accuracy and confirming the efficacy of the proposed ResGCN. © 2023 IEEE.

关键词： Convolutional neural networks

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Research on Harmonic Overvoltage Suppression Technology of Single-core Cable Shielding Layer

Research on Harmonic Overvoltage Suppression Technology of S...

引用

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

作者： Chen, Tao Wu, Shouyuan Zhu, Ke Key Laboratory of Power System Intelligent Dispatch Control of Ministry of Education Shandong University Jinan China

ISBN: (数字)9781728143033

ISBN: (纸本)9781728143033

Traditional shielding layer protector of single-core cable can only suppress lightning and fault overvoltage, and can not solve the induced overvoltage and harmonic overvoltage caused by harmonics. When a discharge damping technology for shielding layer of single-core cable is proposed. Firstly, establish the coupling model of shielding layer by analyzing the mechanism of shielding layer induced voltage;then, study the induced overvoltage and resonance overvoltage caused by harmonics based on the model;furthermore, a technical scheme of reducing the overvoltage caused by harmonics by grounding the cable shielding layer through discharge capacitance and damping resistance in series is proposed;finally, give the method of choosing parameters of discharge capacitance and damping resistance. Theoretical results and simulated analysis confirm effectiveness of this method. © 2020 IEEE.

关键词： Cables

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Fast Assessment of Short-Term Voltage Stability of AC/DC power Grid Based on CNN

Fast Assessment of Short-Term Voltage Stability of AC/DC Pow...

引用

2019 IEEE PES Asia-Pacific power and Energy Engineering Conference, APPEEC 2019

作者： Yang, Weiquan Zhu, Yuanzhen Liu, Yutian Shandong University Jinan Key Laboratory of Power System Intelligent Dispatch and Control Ministry of Education China

ISBN: (纸本)9781728108131

With the development of HVDC transmission and changes of load composition and characteristics, the short-term voltage problem seriously threatens the safety and stable operation of power systems. Based on deep learning, a fast short-term voltage stability assessment method for AC/DC receiving-end power grid is proposed in this paper. Considering the influence of multi-infeed DC and dynamic loads, convolutional neural network is adopted in this paper, which use the steady-state power flow and fault features as inputs and the short-term voltage stability of the area around the DC drop point as the output. Simulation results of real multi-infeed AC/DC power grid demonstrate the effectiveness of the proposed method. © 2019 IEEE.

关键词： Dynamic loads

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Optimal allocation of black-start capability considering renewable energy penetration in AC-DC grid

Optimal allocation of black-start capability considering ren...

引用

2018 International Conference on Electronics Technology, ICET 2018

作者： Zhao, Jin Wang, Hongtao Liu, Yao Key Laboratory of Power System Intelligent Dispatch and Control of Ministry of Education Shandong University Jinan China

ISBN: (纸本)9781538657522

The categories of black start resources (BSR) have been extended in the modern smart grid with the penetration of renewable energies. On one hand, the distributed renewable energy resources (RES) and storage facilities give birth to an new kinds of black-start resource (BSR): RES hybrid unit. On the other hand, the flexible HVDC link in modern smart grid can be a valuable BSR provider. Considering the novel kinds of BSR, the optimal allocation problem is addressed in this paper. Firstly, the optimal black-start capability of a grid is determined through pursuing the highest society utility. Secondly, the utility theory is utilized to determine the optimal capacity of different kinds of BSRs. Furthermore, the problem of BSR siting is dealt with by applying the conception of electrical betweenness. Case studies present the effectiveness of the proposed method by the modified IEEE-9 and IEEE-30 bus testing system. © 2018 IEEE.

关键词： Renewable energy resources

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Sub-Synchronous Oscillation Suppression in Series-Compensated Grid-Connected Doubly-Fed Wind Turbines Utilizing Virtual Inductance on the Rotor Side 7

Sub-Synchronous Oscillation Suppression in Series-Compensate...

引用

7th IEEE International Electrical and Energy Conference, CIEEC 2024

作者： Wang, Haobo Wang, Hongtao Xin, Peiqi Song, Zhen Shandong University Key Laboratory of Power System Intelligent Dispatch and Control of Ministry of Education Jinan China

ISBN: (纸本)9798350359558

To tackle the issue of Sub-Synchronous control Interaction (SSCI) in doubly fed wind turbines featuring series capacitor compensation, a novel approach is undertaken by creating an impedance model for the Doubly Fed Induction Generator (DFIG). This model utilizes a power outer-loop control method for decoupling, in alignment with IEEE standards. The study extensively examines the genesis and underlying causes of sub-synchronous oscillations. A novel rotor-side suppression strategy, featuring the integration of virtual inductance into the DFIG's rotor control loop, is proposed to mitigate oscillations induced by series-compensated transmission line parameters. Comparative analysis indicates that the inclusion of virtual inductance effectively quells sub-synchronous oscillations. Additionally, a Simulink-based grid-connected DFIG model is constructed, and time-domain simulations are conducted to validate the model's accuracy in predicting grid-connected sub-synchronous oscillations and confirm the efficacy of the proposed suppression technique. © 2024 IEEE.

关键词： Inductance

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Aggregated power Flexibility of Active Distribution Network Considering Reliability and Uncertainty

Aggregated Power Flexibility of Active Distribution Network ...

引用

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

作者： Song, Yichen Wang, Mingqiang Wang, Mengxia Key Laboratory of Power System Intelligent Dispatch and Control of Ministry of Education Shandong University Jinan China

ISBN: (纸本)9781728143033

With the emergence of more and more distributed energy sources (DERs) in distribution network, the traditional distribution network is changing from passive to active, and it is expected to be capable of providing flexibility for transmission system. To effectively quantify the aggregated power flexibility of active distribution network (ADN) provided to upstream gird, the situation inside ADN must be respected. This paper proposes two aggregated power flexibility quantification models considering the uncertainties of DERs and load, and the reliability in ADN. The uncertainties are modelled by distributions and the system reliability is guaranteed by the expected energy not supplied (EENS) constraint. The optimization is solved by mixed integer linear programming (MILP). The performance of the proposed method is tested on the modified IEEE 33-bus distribution system. © 2020 IEEE.

关键词： Integer programming

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Ill-conditioned Problem of Fault Location Equations for Three-Terminal Lines in Distribution Network by μMPMU

Ill-conditioned Problem of Fault Location Equations for Thre...

引用

2022 power system and Green Energy Conference, PSGEC 2022

作者： Zhang, Junpeng Meng, Xinyuan Wang, Rundong Shandong University Key Laboratory of Power System Intelligent Dispatch and Control Ministry of Education Jinan China

ISBN: (数字)9781665499934

ISBN: (纸本)9781665499934

Three terminal line is a typical structure in distribution network, and its fault location has been the focus because of the large scale distributed generation integration. Recently, a parameter-free fault location method based on line voltage was proposed, which overcomes the problem that line parameters are unknown and only two line voltages can be measured in distribution network of China. Although it is more practical than previous methods, the RTDS test shows that the location equations of this method have ill-conditioned problems, that is, tiny measurement error causes too large deviation in the result. To study this problem, the ill-conditioned problem of the location equations is analyzed by condition number at first. Then the condition number of the location equations is calculated by simulation, and it is verified that the location results will produce a large error in the condition of small error of PSCAD simulation data and μMPMU measurement data from RTDS device. © 2022 IEEE.

关键词： Errors

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Transient Stability Analysis and Enhancement of Virtual Synchronous Generator with Current Limiter 7

Transient Stability Analysis and Enhancement of Virtual Sync...

引用

7th IEEE International Electrical and Energy Conference, CIEEC 2024

作者： Wang, Yantuan Ye, Hua Yang, Jialun Chu, Xiaodong Mou, Qianying Key Laboratory of Power System Intelligent Dispatch and Control of Ministry of Education Shandong University Jinan China

ISBN: (纸本)9798350359558

The modern power system exhibits a double high characteristic, where the physical structure and control strategies of power electronic devices have altered the stability characteristics of the modern power system. This paper investigates the transient instability issue faced by virtual synchronous generators (VSG) equipped with a current limiter during grid faults. Firstly, the transient stability model of the VSG is established. Then, the equal-area criterion (EAC) is employed to reveal the mechanism of transient instability in VSG and elucidate the influence of the current limiter on the transient stability of VSG. Based on this analysis, current angle configuration methods are further proposed to enhance the transient stability of VSG. Finally, the correctness of the mechanism analysis and proposed methods is validated through simulation. © 2024 IEEE.

关键词： Synchronous generators

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GPU-Based N-1 AC power Flow with an Improved-Convergence Fast Decoupled Method Considering Memory Limitations in Large power Grids

GPU-Based N-1 AC Power Flow with an Improved-Convergence Fas...

引用

2023 International Conference on power system Technology, powerCon 2023

作者： Meng, Xinyuan Yun, Zhihao Shandong University Key Laboratory of Power System Intelligent Dispatch and Control Ministry of Education Jinan China

ISBN: (纸本)9798350300222

The fast and random variation in large-scale power system operation caused by the integration of renewable energy brings challenges for the accuracy and real-time performance of N-1 security analysis (SSA). To meet the requirements., the N-l AC power flow calculation can be accelerated effectively by taking advantage of the powerful parallel ability of the GPU. The fast decoupled power flow method is suitable for GPU-based N-l AC power flow because of its high computational speed and smaller storage space requirements. To solve the problem that the number of iterations may increase dramatically in some heavy-load scenarios., an improved-convergence fast decoupled method is proposed that does not increase the storage occupation considering the memory limitations of the GPU. The effectiveness of the proposed method is verified on several large-scale test systems. The test results demonstrate that the performance of the method proposed in this paper is satisfactory for the online N-l SSA of large power grids. © 2023 IEEE.

关键词： Graphics processing unit

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A condition-based maintenance approach to an optimal maintenance strategy considering equipment imperfect maintenance model 5

A condition-based maintenance approach to an optimal mainten...

引用

5th IEEE International Conference on Electric Utility Deregulation, Restructuring and power Technologies, DRPT 2015

作者： Li, Yeyong Han, Xueshan Xu, Bo Wang, Yunpeng Key Laboratory of Power System Intelligent Dispatch and Control of Ministry of Education Shandong University Jinan China

ISBN: (纸本)9781467371063

power grid tries to maximize its profit by reducing generation cost, supply costs and operation costs while sustaining its required reliability. Developing maintenance strategies is one of the most effective methods. The condition-based maintenance approach is a key method in providing optimal maintenance strategies in theory. It considers the tradeoffs between the system maintenance risk and the potential system failure risk of system reliability losses. Since power grid contains a group of different kinds of equipments and the reliability of the electric equipments varies with time. One type of electrical equipment has different maintenance models because of their different failure modes and deterioration processes. A union method for equipment maintenance model and system condition-based maintenance model is proposed. The modified imperfect maintenance model-Kijima II model is selected for equipment maintenance model comparing with minimal repair and perfect maintenance through optimizing imperfect maintenance effect factor. In addition, a genetic algorithm is used to find the optimal maintenance strategies from possible maintenance scenarios. These optimal maintenance strategies have been tested on a HVDC link which is simplified into an equivalent serial and parallel system and an IEEE-RTS79 system. The results demonstrate the feasibility and validity of the proposed model. © 2015 IEEE.

关键词： Genetic algorithms

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