检索结果-南通市图书馆

Smart grid dispatch powered by deep learning:a survey

在线全文

学校读者我要写书评

暂无评论

Frontiers of Information Technology & Electronic Engineering 2022年第5期23卷 763-776页

作者： Gang HUANG Fei WU chuangxin guo Zhejiang Lab Hangzhou 311121China College of Computer Science and Technology Zhejiang UniversityHangzhou 310027China College of Electrical Engineering Zhejiang UniversityHangzhou 310027China

Power dispatch is a core problem for smart grid operations.It aims to provide optimal operating points within a transmission network while power demands are changing over space and time.This function needs to be run every few minutes throughout the day;thus,a fast,accurate solution is of vital importance.However,due to the complexity of the problem,reliable and computationally efficient solutions are still under development.This issue will become more urgent and complicated as the integration of intermittent renewable energies increases and the severity of uncertain disasters gets worse.With the recent success of artificial intelligence in various industries,deep learning becomes a promising direction for power engineering as well,and the research community begins to rethink the problem of power dispatch.This paper reviews the recent progress in smart grid dispatch from a deep learning perspective.Through this paper,we hope to advance not only the development of smart grids but also the ecosystem of artificial intelligence.

关键词： Artificial intelligence Deep learning Power dispatch Smart grid

Method to Quantifying the Logical Node Importance for IEC 61850 Based Substation Automation Systems

在线全文

学校读者我要写书评

暂无评论

CSEE Journal of Power and Energy Systems 2023年第1期9卷 272-283页

作者： Jie Yang Yihao guo chuangxin guo Zhe Chen Shenghan Wang College of Electrical Engineering Zhejiang UniversityHangzhou 310027China Electric Power Research Institute of State Grid Zhejiang Electric Power Company Hangzhou 310014China

The problem of logical node(LN)importance quantification in an IEC 61850 based substation automation system(SAS)is investigated in this paper.First,a weighted and directed static complex network model is established by analyzing the characteristics of SAS,according to IEC 61850.Then,we propose a method,which combines topology value and information adjunction value by introducing a first-order linear feedback controller to quantify the value of LNs.On this basis,some definitions for equivalent network conversion are proposed to greatly reduce the complexity of the original network topology.Also,the absolute value and relative value are introduced to quantify LN importance from the perspective of the node’s necessity and influence,respectively.Finally,simulation results of the case study demonstrate that the proposed method is effective and provides a broader and clearer perspective for viewing the logical node importance for IEC61850 based SAS.

关键词： Absolute value complex network dynamics equivalent network IEC 61850 logical node importance quantification relative value substation automation system

Fully Distributed Risk-based Robust Reserve Scheduling for Bulk Hybrid AC-DC Systems

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

CSEE Journal of Power and Energy Systems 2023年第2期9卷 634-644页

作者： Zhe Chen Shufeng Dong chuangxin guo Yi Ding Hangyin Mao the college of Electrical Engineering in Zhejiang University HangzhouZhejiang 310027China Zhejiang Power Grid Co. LTD.HangzhouZhejiang 310027China

To enhance the cost-effectiveness of bulk hybrid AC-DC power systems and promote wind consumption,this paper proposes a two-stage risk-based robust reserve scheduling(RRRS)model.Different from traditional robust optimization,the proposed model applies an adjustable uncertainty set rather than a fixed one.Thereby,the operational risk is optimized together with the dispatch schedules,with a reasonable admissible region of wind power obtained correspondingly.In addition,both the operational base point and adjustment capacity of tielines are optimized in the RRRS model,which enables reserve sharing among the connected areas to handle the significant wind uncertainties.Based on the alternating direction method of multipliers(ADMM),a fully distributed framework is presented to solve the RRRS model in a distributed way.A dynamic penalty factor adjustment strategy(DPA)is also developed and applied to enhance its convergence properties.Since only limited information needs to be exchanged during the solution process,the communication burden is reduced and regional information is protected.Case studies on the 2-area 12-bus system and 3-area 354-bus system illustrate the effectiveness of the proposed model and approach.

关键词： Dynamic penalty factor adjustment strategy fully distributed framework hybrid AC-DC systems reserve scheduling risk robust optimization

Applications of survival functions to continuous semi-Markov processes for measuring reliability of power transformers

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Journal of Modern Power Systems and Clean Energy 2017年第6期5卷 959-969页

作者： Yifei WANG Mohammad SHAHIDEHPOUR chuangxin guo School of Automation Guangdong University of TechnologyGuangzhou 510006China Galvin Center for Electricity Innovation Illinois Institute of TechnologyChicagoIL 60616USA College of Electrical Engineering Zhejiang UniversityHangzhou 310058China

The reliability of power transformers is subject to service age and health condition.This paper proposes a practical model for the evaluation of two reliability indices:survival function(SF)and mean residual life(MRL).In the proposed model,the periodical modeling of power transformers are considered for collecting the information on health conditions.The corresponding health condition is assumed to follow a continuous semi-Markov process for representing a state transition.The proportional hazard model(PHM)is introduced to incorporate service age and health condition into hazard rate.In addition,the proposed model derives the analytical formulas for and offers the analytical evaluation of SF and MRL.SF and MRL are calculated for new components and old components,respectively.In both cases,the proposed model offers rational results which are compared with those obtained from comparative models.The results obtained by the contrast of the proposed analytical method and the Monte Carlo method.The impact of differentmodel parameters and the coefficient of variation(CV)on reliability indices are discussed in the case studies.

关键词： Power system reliability Transformers Proportional hazard model Survival function Mean residual life Semi-Markov process

Modeling cascading failures and mitigation strategies in PMU based cyber-physical power systems

在线全文

学校读者我要写书评

暂无评论

Journal of Modern Power Systems and Clean Energy 2018年第5期6卷 944-957页

作者： Yuqi HAN chuangxin guo Shiying MA Dunwen SONG College of Electrical Engineering Zhejiang University China Electric Power Research Institute

This paper presents a model of cascading failures in cyber-physical power systems(CPPSs) based on an improved percolation theory, and then proposes failure mitigation strategies. In this model, the dynamic development of cascading failures is divided into several iteration stages. The power flow in the power grid, along with the data transmission and delay in the cyber layer, is considered in the improved percolation theory. The interaction mechanism between two layers is interpreted as the observability and controllability analysis and data update analysis influencing the node state transformation and security command execution. The resilience indices of the failures reflect the influence of cascading failures on both topological integrity and operational state. The efficacy of the proposed mitigation strategies is validated, including strategies to convert some cyber layer nodes into autonomous nodes and embed unified power flow controller(UPFC) into the physical layer. The results obtained from simulations of cascading failures in a CPPS with increasing initial failure sizes are compared for various scenarios.Dynamic cascading failures can be separated into rapid and slow processes. The interdependencies and gap between the observable and controllable parts of the physical layer with the actual physical network are two fundamental reasons for first-order transition failures. Due to the complexity of the coupled topological and operational relations between the two layers, mitigation strategies should be simultaneously applied in both layers.

关键词： Cyber physical power system Cascading failure Improved percolation theory Interdependent network Mitigation strategy

Impact analysis of human factors on power system operation reliability

在线全文

学校读者我要写书评

暂无评论

Journal of Modern Power Systems and Clean Energy 2018年第1期6卷 27-39页

作者： Yingkai BAO chuangxin guo Jinjiang ZHANG Jiaxin WU Suhong PANG Zhiping ZHANG College of Electrical Engineering Zhejiang University National Electric Power Dispatching and Control Center State Grid Corporation of China College of Electrical Engineering Zhejiang University of Science and Technology Maintenance Company of State Grid Henan Electric Power Company

Along with the improvement of electrical equipment reliability,people’s unsafe behaviors and human errors have become one of main sources of risks in power systems.However,there is no comprehensive study on human factors and human reliability analysis in power systems.In allusion to this situation,this paper attempts to analyze the impact of human factors on power system reliability.First,this paper introduces current situation of human factors in power systems and the latest research progress in this field.Several analysis methods are proposed according to specified situations,and these methods are verified by some power system practical cases.On this base,this paper illustrates how human factors affect power system operation reliability from 2 typical aspects:imperfect maintenance caused by human errors,and impact of human factors on emergency dispatch operation and power system cascading failure.Finally,based on information decision and action in crew(IDAC),a novel dispatcher training evaluation simulation system(DTESS)is established,which can incorporate all influencing factors.Once fully developed,DTESS can be used to simulate dispatchers’response when encountering an initial event,and improve power system dispatching reliability.

关键词： Human factors modeling Human reliability analysis Power system reliability Imperfect maintenance Emergency dispatch operation Dispatcher training evaluation simulation system(DTESS)

在线全文

学校读者我要写书评

暂无评论

计及复合碳泄漏效应的电力系统双层规划

电力系统自动化 2024年第12期48卷 1-13页

作者：林雨洁张笑演熊厚博乔艺林石浩杰郭创新浙江大学电气工程学院浙江省杭州市310027 国网浙江省电力有限公司嘉兴供电公司浙江省嘉兴市314000

“双碳”目标下,不对称碳监管政策在电力行业低碳转型路径中引发的强、弱复合碳泄漏效应需要引起关注。针对单边碳减排政策在电力系统中的影响,结合边际电价理论构建了考虑输电网级能源网架扩展与配电网级能源枢纽负荷行为的电力系统双... 详细信息

“双碳”目标下,不对称碳监管政策在电力行业低碳转型路径中引发的强、弱复合碳泄漏效应需要引起关注。针对单边碳减排政策在电力系统中的影响,结合边际电价理论构建了考虑输电网级能源网架扩展与配电网级能源枢纽负荷行为的电力系统双层规划模型。首先,在上层能源网架规划中分析线路扩展带来的弱碳泄漏效应,通过拉格朗日乘子求解电网边际电价,在此基础上计及强碳泄漏效应影响下的负荷转移行为,建立下层能源枢纽经济规划模型;其次,分析碳泄漏的成因并提出缓和手段,建立对应模型;然后,提出电力系统双层低碳规划的求解流程,并设计提升双层规划收敛性的二分启发式方法;最后,在改进的IEEE 12节点系统与改进的IEEE 236节点系统中进行仿真,分析碳价格与碳泄漏缓和手段对碳泄漏效应的影响,算例结果验证了碳泄漏的形成渠道与影响。分析免费碳配额或碳排放关税对碳泄漏效应的缓和作用与风险,同时,研究双层规划模型收敛性,可为电力系统低碳转型路径中开展合理碳监管提供参考。

关键词：碳泄漏双碳低碳政策边际电价负荷转移电力系统规划

在线全文

学校读者我要写书评

暂无评论

微电网群系统的分布式控制方法

电气自动化 2024年第2期46卷 28-31页

作者：杨梓锋郭创新浙江大学电气工程学院浙江杭州310027

为应对日益增长的微网群系统稳定性、经济性运行控制需求,提出了一种考虑并网和孤岛运行模式的微网群系统分布式控制方法。方法基于一致性算法实现微电网分布式分层控制,并考虑了微网群内各微网的协调控制。Simulink仿真结果表明,在负... 详细信息

为应对日益增长的微网群系统稳定性、经济性运行控制需求,提出了一种考虑并网和孤岛运行模式的微网群系统分布式控制方法。方法基于一致性算法实现微电网分布式分层控制,并考虑了微网群内各微网的协调控制。Simulink仿真结果表明,在负荷投切等情况发生时,工作在并网或孤岛模式的微电网群系统频率、电压波动在合理范围内,分布式电源始终按照等微增率原则分配出力。所提微电网群系统分布式控制方法能够维持微电网群的频率稳定和电压稳定,并通过分布式电源出力分配实现经济性目标。

关键词：微电网群分布式控制下垂控制等微增率一致性算法

基于有限状态机的次同步振荡在线监测与抑制策略

在线全文

学校读者我要写书评

暂无评论

电力系统及其自动化学报 2024年第1期36卷 116-125页

作者：王新宇窦宇宇任正杨梓锋郭创新国网内蒙古东部电力有限公司电力科学研究院呼和浩特010000 浙江大学电气工程学院杭州310027

随着大规模风电接入电网,次同步振荡风险不断提高,现有研究提出的次同步振荡辨识指标不够全面,抑制方法或成本较高,或影响风电场有功输出。针对这一问题,本文对次同步振荡的在线监测方法与抑制措施进行分析,结合次同步振荡的启动门槛、... 详细信息

随着大规模风电接入电网,次同步振荡风险不断提高,现有研究提出的次同步振荡辨识指标不够全面,抑制方法或成本较高,或影响风电场有功输出。针对这一问题,本文对次同步振荡的在线监测方法与抑制措施进行分析,结合次同步振荡的启动门槛、功率振幅门槛、功率周期门槛和振荡次数门槛,提出一种基于有限状态机的次同步振荡在线监测方法及相应的抑制策略。该监测方法根据三相总瞬时功率的变化轨迹辨识次同步振荡的发生,感知次同步振荡的严重程度,并采取分阶段在转子侧变流器q轴、d轴附加阻尼控制器抑制次同步振荡。Simulink仿真结果表明,采取所提策略在不同串补度工况下均能准确辨识并抑制次同步振荡。

关键词：次同步振荡在线监测附加阻尼控制有限状态机双馈风电场