检索结果-内蒙古大学图书馆

作者： Yinsheng Su Mengxuan Guo Haicheng Yao Lin Guan Jiyu Huang Siting Zhu Zhi Zhong Department of Power System Operation China Southern Power Grid School of Electric Power South China University of Technology Guangdong Provincial Key Laboratory of Intelligent Operation and Control for New Energy Power System

Small-signal stability(SSA) is important to power system security.A data-driven approach is established for rapid prediction of the power system oscillation *** key of the approach is the Graph Convolution Networks(GCN) with residual mechanism,which works to aggregate features from high-dimension steady-state operation information and is denoted as ResGCN(RESidual GCN) in the *** residual mechanism helps to overcome the network degradation *** the oscillation frequency and damping ratio of multiple modes can be predicted by the proposed *** performance of the proposed scheme as well as its adaptability to the power system topological changes is verified on the IEEE 39 Bus system.

关键词： Small-signal Stability Graph Deep Learning Graph Convolution Networks(GCN),Residual mechanism

来源：评论

学校读者我要写书评

暂无评论

Feasibility analysis of single-end equivalent modeling to LCC-HVDC transimission system 4

Feasibility analysis of single-end equivalent modeling to LC...

引用

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

作者： Wang, Bin Li, Zhizhong Guo, Qi Liu, Zhijiang Li, Shuyong Cui, Liu Tsinghua University Dept. of Electrical Engineering Beijing China Guangdong Provincial Key Laboratory of Intelligent Operation and Control for New Energy Power System Guangzhou China National Energy Power Grid Technology RD Centre Guangzhou China CSG Key Laboratory for Power System Simulation Electric Power Research Institute China Southern Power Grid Guangzhou China

ISBN: (纸本)9781728196060

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. © 2020 IEEE.

关键词： Electric inverters

来源：评论

学校读者我要写书评

暂无评论

Adaptability Study on Out-of-Step Separation Devices of Complex Multiinfeed AC/ DC power Systems

Adaptability Study on Out-of-Step Separation Devices of Comp...

引用

International Conference on power System Technology (powerCON)

作者： Yong Chen Dongxu Chang Yihua Zhu Yukun Zhu Hengdao Guo Shengnan Li Electric Power Research Institute Ltd. of Yunnan Power Grid Co. KunMing China State Key Laboratory of HVDC Electric Power Research Institute China Southern Power Grid 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: (纸本)9781665407380

The power flow distribution of the GuangxiGuangdong AC transmission section (GX-GD section) has changed greatly as Kunliulong and Lugaozhao three-terminal HVDC projects have been put into operation, and it is necessary to study on the adaptability of out-of-step separation devices. Based on the real primary system, an equivalent system model is proposed in this paper which can accurately locate the oscillation center and calculate the minimum voltage at the measuring point. Dynamic real-time simulation is carried out for various types and different principles of out-of-step separation devices. Typical problems such as unreliable out-of-step locking criterion in the fault process and device refusing to move when the oscillation center is located at the device installation point are found and solved At the same time, based on the power grid panoramic simulation test technology and the actual configuration of out-of-step separation devices, the problems in the coordination of out-of-step devices near the GX-GD section are comprehensively studied, and the suggestions of putting the wide area out-of-step separation system into operation as soon as possible are put forward. The improvement and optimization measures proposed in this paper have been applied in the real system.

关键词： Adaptation models Voltage measurement power measurement power system dynamics Stability criteria power system stability power grids

来源：评论

学校读者我要写书评

暂无评论

Frequency Security Assessment for Receiving-end System Based on Deep Learning Method

Frequency Security Assessment for Receiving-end System Based...

引用

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

作者： Ma, Changhui Wang, Liang Gai, Chenhao Yang, Dong Zhang, Pengfei Zhang, Hengxu Li, Changgang Electric Power Research Institute State Grid Shandong Electric Power Company Jinan Shandong China Dispatch and Control Center State Grid Shandong Electrical Power Company Jinan Shandong China Shandong University Key Laboratory of Power System Intelligent Dispatch and Control Ministry of Education Jinan Shandong China State Grid International Development Limited Beijing China

ISBN: (纸本)9781728143033

For hours-ahead assessment of power systems with a high penetration level of renewable generation, a large number of uncertain scenarios should be checked to ensure the frequency security of the system after the severe power disturbance following HVDC blocking. In this situation, the full time-domain simulation is unsuitable as a result of the heavy calculation burden. To fulfill the quick assessment of the frequency security, the online frequency security assessment framework based on deep learning is proposed in this paper. The Deep Belief Network (DBN) method is used to establish the framework. The sample generation method is researched to generate representative samples for the purposed of higher assessment accuracy. A large-scale AC-DC interconnected power grid is adopted to verify the validity of the proposed assessment method. © 2020 IEEE.

关键词： Time domain analysis

来源：评论

学校读者我要写书评

暂无评论

Application of Transformer Modeling Based on Pseudo-flux Characteristic in DC Bias

Application of Transformer Modeling Based on Pseudo-flux Cha...

引用

Electrical Engineering and Automation (IFEEA), International Forum on

作者： Bo Han Shiming Liu Tianqi Nan Key Laboratory of Intelligent Power Dispatching and Control of Ministry of Education Shandong University Jinan China

ISBN: (数字)9781728196275

ISBN: (纸本)9781728196282

Problems related to DC bias of HVDC transmission affect the reliability of transformer differential protection. By expressing the newly defined “pseudo-flux characteristic” in terms of exponential function, a new method is proposed to discriminate fault under DC bias. Pseudo-flux characteristics are obtained through inrush current, the parameters of which are determined by differential evolution algorithm (DE). The test of the pseudo-flux characteristics acquisition method is completed on the single-phase transformer in the laboratory. The method of acquiring pseudo-flux characteristics is simple and has high accuracy in the saturation interval. In addition, a simulation of DC bias magnetism was built in PSCAD, and the magnetic flux characteristics of inrush current, DC bias and faults were compared. It illustrates the feasibility of using the transformer pseudo-flux characteristic model to protect in such scenarios and the superiority compared with the second harmonic restraint method.

关键词： Magnetic flux Surge protection Transformer cores power transformers Circuit faults Surges PSCAD

来源：评论

学校读者我要写书评

暂无评论

Method for Identifying Symmetrical Inrush Current of UHV Converter Transformer Based on Matrix Pencil

Method for Identifying Symmetrical Inrush Current of UHV Con...

引用

Electrical Engineering and Automation (IFEEA), International Forum on

作者： TianQi Nan Shiming Liu Bo Han YunYun Sun Key Laboratory of Intelligent Power Dispatching and Control of Ministry of Education Shandong University Jinan China

ISBN: (数字)9781728196275

ISBN: (纸本)9781728196282

UHV converters are equipped with large-difference protection and small-difference protection. When transformer is switched on under no load condition. The differential current of the large-difference protection is symmetrical magnetizing inrush current, and the second harmonic content of this inrush current is low, which makes the large-difference protection easy to malfunction. Because the symmetrical inrush current is not easy to identify from the waveform, but the matrix pencil can identify the amplitude and decay time constant of each harmonic component of the signal, this feature of the matrix pencil can distinguish fault current, inrush current and symmetric inrush current. In this paper, the formation mechanism of symmetrical inrush current is analyzed, and a UHV converter station model is established. The simulation test results verify the effectiveness of the matrix pencil method.

关键词： Fault diagnosis Symmetric matrices Surge protection Harmonic analysis Surges Matrix converters Magnetic recording

来源：评论

学校读者我要写书评

暂无评论

Fast Adaptive Auto-Reclosing Strategy of Mmc-Hvdc Transmission Line Based on Half-Bridge Pathway Injection Signal

SSRN

引用

SSRN 2022年

作者： Deng, Xiangli Wang, Peng Liao, Yuelin Zhao, Jinbin Liu, Shiming School of Electric Engineering Shanghai University of Electric Power Yangpu District Shanghai 200090 China State Grid Wenzhou Power Supply Company Zhejiang Province Wenzhou325000 China Key Laboratory of Power System Intelligent Dispatch and Control Shandong University Ministry of Education Ji’nan Shandong Province 250061 China

The probability of instantaneous grounding fault during overhead line transmission is high, and it is necessary to configure an efficient restart plan to restore the system. The traditional reclosing strategy is easy to cause secondary overcurrent shock when the permanent fault is reclosed. The conventional scheme based on active injection signal for fault identification during the reclosing period only considers single-pole identification and will affect the normal operation of the power grid. Aiming at the above problems, a fault identification method based on half-bridge modular multilevel converter (MMC) injection signal is proposed. The proposed method completes the identification of multiple types of faults during reclosing without affecting the normal operation of the sound pole line by adding a control strategy to the valve controller to cooperate with the dc circuit breaker to actively inject characteristic signals. The method has no special requirements for the topology of the MMC sub-module, improves the detection accuracy of the transition resistance, quickly identifies the fault, and has little impact on the power grid operation. The four-terminal MMC-HVDC simulation model is built on PSCAD/EMTDC, and the simulation results verify the effectiveness of the proposed method. © 2022, The Authors. All rights reserved.

关键词： Poles

来源：评论

学校读者我要写书评

暂无评论

Generation expansion planning considering efficient linear EENS formulation

引用

Global Energy Interconnection 2021年第3期4卷 273-284页

作者： Donglei Sun Zhijie Zheng Shuai Liu Mingqiang Wang Yi Sun Dong Liu Economic&Technology Research Institute State Grid Shandong Electric Power CompanyJinan 250021Shandong ProvinceP.R China Key Laboratory of Power System Intelligent Dispatch and Control of Ministry of Education Shandong UniversityJinan 250061Shandong ProvinceP.R China ELSEVIER

power system equipment outages are one of the most important factors affecting the reliability and economy of power *** is crucial to consider the reliability of the planning *** this paper,a generation expansion planning(GEP)model is proposed,in which the candidate generating units and energy storage systems(ESSs)are simultaneously planned by minimizing the cost incurred on investment,operation,reserve,and *** reliability cost is computed by multiplying the value of lost load(VOLL)with the expected energy not supplied(EENS),and this model makes a compromise between economy and *** the computation of EENS makes the major computation impediment of the entire model,a new efficient linear EENS formulation is proposed and applied in a multi-step GEP *** doing so,the computation efficiency is significantly improved,and the solution accuracy is still *** proposed GEP model is illustrated using the IEEE-RTS system to validate the effectiveness and superiority of the new model.

关键词： Expected energy not supplied Generation expansion planning Linearization methods

来源：评论

学校读者我要写书评

暂无评论

A Deep Reinforcement Learning Based control Strategy for Combined Wind Energy Storage System

A Deep Reinforcement Learning Based Control Strategy for Com...

引用

Sustainable power and Energy Conference (iSPEC)

作者： Guangwei Xiang Ming Yang Shiying Huang Guangyuan Yu Aihui Yin Xiao Liu Heilongjiang Electric Power Company State Grid Corporation of China Harbin China Key Laboratory of Power System Intelligent Dispatch and Control Shandong University Jinan China Shandong Electric Power Company State Grid Corporation of China Jinan China

ISBN: (纸本)9781665414401

For renewable energy producers, the uncertainties of power generation and time-varying electricity prices may lead to economic losses. This paper proposes a deep reinforcement learning (DRL) based control model combined energy storage system (ESS) to maximize the income of the wind power producer. It is able to adapt the uncertainties by itself that can avoid the errors caused by modeling the uncertainties. It can also learn and improve the strategy based on feedbacks got by the mechanism of interacting with the environment. Moreover, Rainbow, an improved DRL algorithm, is introduced to formulate the optimal model. Finally, the effectiveness of the proposed model is verified based on the wind farm located in Jiangsu, China.

关键词： Adaptation models Renewable energy sources Uncertainty Wind energy Heuristic algorithms Reinforcement learning Wind power generation

来源：评论

学校读者我要写书评

暂无评论

Reliability Evaluation of a Regional Integrated Energy System Based on Complex Network Theory

Reliability Evaluation of a Regional Integrated Energy Syste...

引用

Sustainable power and Energy Conference (iSPEC)

作者： Jifeng Li Kuizheng Song Xingtang He Hao Luo Dalian Electric Power Supply Company State Grid Liaoning Electric Power Supply Co. Ltd Dalian China Dispatching and Control Center State Grid Liaoning Electric Power Supply Co. Ltd Shenyang China Key Laboratory of the Ministry of Education on Smart Power Grids Tianjin University Tianjin China Key Laboratory of Modern Power System Simulation and Control & Renewable Energy Technology Northeast Electric Power University Jilin China

ISBN: (纸本)9781665414401

Most of the methods currently used to evaluate the reliability of integrated energy supply mainly consider such systems on a microgrid scale and focus on the effects of interactions among various energy carriers on the overall energy supply reliability of the system. As a result, it is difficult to analyze the system reliability in terms of its topology. Therefore, this paper proposes an approach for evaluating the reliability of a regional integrated energy system based on complex network theory. First, the feasibility of complex network theory application was analyzed based on the structural framework of the regional integrated energy system. Then, a weighted complex network model containing network characteristics was constructed by improving the “distance” parameter in the complex network theory. Employing this model enabled the proposal of reliability evaluation indices, including nodes and the entire system, from the perspective of the system network topology. Finally, the effectiveness and applicability of the developed method were verified by constructing a test system. The application of complex network theory for reliability evaluations of regional integrated energy systems described in this paper provides guidance for planning and constructing future systems at the level of topology reliability.

关键词： Couplings Complex networks Microgrids Energy conversion Reliability theory Propagation losses Topology

来源：评论

学校读者我要写书评

暂无评论

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案：

请选择收藏分类：

通借通还

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：