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计及交互功率不确定性和柔性负荷的输配协同优化调度

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高电压技术 2024年第8期50卷 3521-3534,I0018页

作者：梅府贤李昀熠万灿覃洪培彭琰鞠平浙江大学电气工程学院杭州310027 国网浙江省电力有限公司电力科学研究院杭州310014

分布式新能源高比例渗透和负荷主动响应加深了输配电网之间的耦合,给输配电网安全可靠运行带来巨大的挑战。为实现输配电网协同运行,提出一种考虑交互功率非参数概率特征和柔性负荷的输配协同双层优化方法。首先,建立计及柔性负荷的下... 详细信息

分布式新能源高比例渗透和负荷主动响应加深了输配电网之间的耦合,给输配电网安全可靠运行带来巨大的挑战。为实现输配电网协同运行,提出一种考虑交互功率非参数概率特征和柔性负荷的输配协同双层优化方法。首先,建立计及柔性负荷的下层配电网最优潮流模型,基于KKT条件构建配电网边界交互功率和新能源出力之间的解析映射关系,进而结合高斯混合模型,以非参数形式刻画交互功率的概率分布,提升交互功率不确定性描述的准确性。然后建立考虑交互功率安全区间约束和机组组合的输电网上层优化模型,基于KKT条件得到下层优化模型的解析解,将双层模型转化为单层模型进行求解,保证输配优化调度的协同性和可行性。最后,采用IEEE-30节点输电系统和IEEE-33节点配电系统算例仿真验证所提方法的有效性和准确性。

关键词：输配协同交互功率柔性负荷新能源不确定性非参数

超顺磁性纳米功能材料Fe_(3)O_(4)@Ca(H_(2)PO_(4))_(2)对Cd污染稻田土壤修复作用的研究

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环境科学学报 2024年第1期44卷 414-423页

作者：江湘婷张立志万灿孙圆鹏黎洁王强西南大学资源环境学院重庆400716 重庆市农业资源与环境研究重点实验室重庆400716 四川省绵阳市涪城区住房和城乡建设局绵阳621000

农田土壤镉(Cd)污染与危害不容忽视,亟需探索经济、高效的Cd污染土壤修复技术.采用共沉淀法制备超顺磁性纳米磷酸盐功能化材料(Magnetic nano-Fe_(3)O_(4)@Ca(H_(2)PO_(4))_(2),MFC),并用于重庆市某Cd污染稻田土壤磁选修复,在修复后的... 详细信息

农田土壤镉(Cd)污染与危害不容忽视,亟需探索经济、高效的Cd污染土壤修复技术.采用共沉淀法制备超顺磁性纳米磷酸盐功能化材料(Magnetic nano-Fe_(3)O_(4)@Ca(H_(2)PO_(4))_(2),MFC),并用于重庆市某Cd污染稻田土壤磁选修复,在修复后的稻田栽培本地低Cd富集水稻“神9优28”和常规水稻“宜香优2115”,研究了施加MFC对土壤理化性质、土壤总Cd和有效态Cd含量、水稻根茎叶和籽粒Cd含量的影响.结果表明,MFC磁选修复Cd污染稻田土壤,显著提高了土壤全磷、有机质和阳离子交换量(CEC)含量;显著降低了土壤中的总Cd和有效态Cd含量,以施加1.0%功能化材料的降Cd效果最好,土壤中总Cd去除率为24.03%,有效Cd含量下降12.30%;两种水稻根、茎、叶和成熟期籽粒中Cd含量均显著降低,且低Cd富集品种糙米中的Cd含量显著低于常规品种.

关键词：磁性纳米材料磷酸盐稻田土壤 Cd 大田修复

A review on applications of heuristic optimization algorithms for optimal power flow in modern power systems

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Journal of Modern Power Systems and Clean Energy 2014年第4期2卷 289-297页

作者： Ming NIU can wan Zhao XU The Hong Kong Polytechnic University Hong KongChina

Optimal power flow(OPF)is one of the key tools for optimal operation and planning of modern power *** to the high complexity with continuous and discrete control variables,modern heuristic optimization algorithms(HOAs)have been widely employed for the solution of *** paper provides an overview of the latest applications of advanced HOAs in OPF *** most frequently applied HOAs for solving the OPF problem in recent years are covered and briefly introduced,including genetic algorithm(GA),differential evolution(DE),particle swarm optimization(PSO),and evolutionary programming(EP),etc.

关键词： Heuristic optimization algorithm Optimal power flow Multi-objective optimization Constraint optimization

Reliability evaluation of integrated electricity–gas system utilizing network equivalent and integrated optimal power flow techniques

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Journal of Modern Power Systems and Clean Energy 2019年第6期7卷 1523-1535页

作者： Sheng wanG Yi DING Chengjin YE can wan Yuchang MO College of Electrical Engineering Zhejiang UniversityHangzhouChina School of Mathematical Sciences Huaqiao UniversityQuanzhouChina

The wide utilization of gas-fired generation and the rapid development of power-to-gas technologies have led to the intensified integration of electricity and gas *** random failures of components in either electricity or gas system may have a considerable impact on the reliabilities of both ***,it is necessary to evaluate the reliabilities of electricity and gas systems considering their *** this paper,a novel reliability evaluation method for integrated electricity-gas systems(IEGSs)is ***,reliability network equivalents are utilized to represent reliability models of gas-fired generating units,gas sources(GSs),power-to-gas facilities,and other conventional generating units in IEGS.A contingency management schema is then developed considering the coupling between electricity and gas systems based on an optimal power flow ***,the time-sequential Monte Carlo simulation approach is used to model the chronological characteristics of the corresponding reliability network *** proposed method is capable to evaluate customers’reliabilities in IEGS,which is illustrated on an integrated IEEE Reliability Test System and Belgium gas transmission system.

关键词： Integrated electricity–gas system Integrated electricity and gas optimal power flow Reliability network equivalent Time-sequential Monte Carlo simulation

Electric Load Clustering in Smart Grid:Methodologies,Applications,and Future Trends

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Journal of Modern Power Systems and Clean Energy 2021年第2期9卷 237-252页

作者： Caomingzhe Si Shenglan Xu can wan Dawei Chen Wenkang Cui Junhua Zhao The Chinese University of Hong Kong(Shenzhen) ShenzhenChina the College of Electrical Engineering Zhejiang University.Hangzhou.China Shenzhen Institute of Artificial Intelligence and Robotics for Society ShenzhenChina

With the increasingly widespread of advanced metering infrastructure,electric load clustering is becoming more essential for its great potential in analytics of consumers’energy consumption patterns and preference through data ***,a variety of electric load clustering techniques have been put into practice to obtain the distribution of load data,observe the characteristics of load clusters,and classify the components of the total *** can give rise to the development of related techniques and research in the smart grid,such as demand-side *** paper summarizes the basic concepts and the general process in electric load *** similarity measurements and five major categories in electric load clustering are then comprehensively summarized along with their advantages and ***,eight indices widely used to evaluate the validity of electric load clustering are ***,vital applications are discussed thoroughly along with future trends including the tariff design,anomaly detection,load forecasting,data security and big data,etc.

关键词： Electric load clustering similarity measurement clustering technique cluster validity indicator smart grid

Distributed Photovoltaic Generation in the Electricity Market:Status,Mode and Strategy

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CSEE Journal of Power and Energy Systems 2018年第3期4卷 263-272页

作者： Sifan Jiang can wan Chen Chen Erbao Cao Yonghua Song College of Electrical Engineering Zhejiang UniversityHangzhou 310027China Argonne National Laboratory 9700 S.Cass AvenueLemontILUSA College of Economics and Trade Hunan UniversityChangsha 410079China Department of Electrical and Computer Engineering University of MacaoMacaoChina

With the increasingly serious climate change and energy crisis,photovoltaic(PV)generation,as one of the most important renewable energy resources,has experienced dramatic growth worldwide due to its environmental ***-ever,the uncertainty and intermittency of PV bring inevitable challenges to power *** the rapid development of distributed PV and the continuous evolution of the electricity market,increasingly high penetration levels of distributed PV generation have led to a series of problems in power system operations,such as voltage fluctuation,frequency deviation,*** market participation of distributed PV needs to be *** market participation form,market mechanism and bidding strategies are vital to the development of distributed PV in the electricity *** paper comprehensively reviews the development and impacts of distributed PV in the electricity market and discusses the relevant market modes and bidding strategies in detail.

关键词： Bidding strategy centralized transaction distributed PV distributed transaction electricity market.

Situation Awareness of Active Distribution Network:Roadmap,Technologies,and Bottlenecks

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CSEE Journal of Power and Energy Systems 2016年第3期2卷 35-42页

作者： Jin Lin can wan Yonghua Song Renle Huang Xiaoshuang Chen wanfang Guo Yi Zong You Shi State Key Laboratory of Control and Simulation of Power Systems and Generation Equipment Department of Electrical EngineeringTsinghua UniversityBeijing 100084China State Grid Beijing Electric Power Company Beijing 102200China Center for Electric Power and Energy Technical University of DenmarkElektrovej 325DK 2800Denmark

With the rapid development of local generation and demand response,the active distribution network(ADN),which aggregates and manages miscellaneous distributed resources,has moved from theory to *** and optimal operations now require an advanced situation awareness(SA)system so that operators are aware of operation states and potential *** solutions in distribution supervisory control and data acquisition(DSCADA)as well as the distribution automation system(DAS)generally are not able to meet the technology requirements of *** this paper,the authors’participation in the project of developing an SA system as the basic component of a practical active distribution management system(ADMS)deployed in Beijing,China,is *** paper reviews the ADN’s development roadmap by illustrating the changes that are made in elements,topology,structure,and control *** into consideration these hardware changes,a systematic framework is proposed for the main components and the functional hierarchy of an SA system for the *** SA system’s implementation bottlenecks are also presented,including,but not limited to issues in big data platform,distribution forecasting,and security *** technology solutions are also provided.

关键词： Active distribution network distribution automation system roadmap situation awareness technology bottleneck

Efficacy and safety of a sequential treatment with clearing heat and eliminating phlegm and tonifying Qi and activating blood circulation in treating acute ischemic stroke: study protocol for a randomized controlled trial

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Journal of Traditional Chinese Medicine 2022年第4期42卷 604-610页

作者： ZHOU Ziyi wan can ZHAO Yuanqi LIU Xiangzhe GAO Ying AN Hongwei LI Lejun ZHANG Huili YU Xiaofei ZHANG Xinchun wanG Huijuan SHI Qing WEI Chunhua CHEN Jie HUANG Wenguo CHEN Junbin GAO Ying HU Mingzhe CAI Yefeng Department of Neurology Guangdong Provincial Hospital of Chinese MedicineGuangzhou 510120China the Second Clinical College of Guangzhou University of Chinese Medicine Guangzhou 510120China Department of Neurology The First Affiliated Hospital of Henan University of Traditional Chinese MedicineZhengzhou 450000China Department of Neurology Shenyang Second Hospital of Traditional Chinese MedicineShenyang 110100China Department of Neurology Liuzhou Traditional Chinese Medical HospitalLiuzhou 545001China Department of Neurology Wuxi Traditional Chinese Medicine HospitalWuxi 214071China Department of Neurology Qinhuangdao City Hospital of Traditional Chinese MedicineQinhuangdao 066000China Department of Neurology Shanghai Shuguang HospitalShanghai 200120China Department of Neurology the Second Hospital of Hebei Medical UniversityShijiazhuang 050000China Department of Neurology Jiangmen Wuyi Hospital of Traditional Chinese MedicineJiangmen 529000China Department of Neurology Nanshi Hospital Affiliated to Henan UniversityNanyang 473065China Department of Neurology Shanxi Province Hospital of Traditional Chinese MedicineXi'an 710003China Department of Neurology Maoming Hospital of Traditional Chinese MedicineMaoming 525000China Department of Neurology the Northern Guangdong People's HospitalShaoguan 512025China Department of Neurology and Stroke Center Dongzhimen Hospital affiliated to Beijing University of Chinese MedicineBeijing 100700China

OBJECTIVE:To investigate the short-term efficacy and safety outcomes following a sequential treatment with clearing heat and eliminating phlegm(CHEP)formula and tonifying Qi and activating blood circulation(TQABC)formula in patients with acute ischemic stroke(AIS)within a 72 h time ***:In this randomized,multicenter,doubleblinded,placebo-controlled trial,500 participants will be randomly assigned in a ratio of 1∶1 to the CHEP+TQABC group or control *** addition to guidelinebased standard medical care,participants in the treatment group will receive the CHEP formula for the first 5 consecutive days followed by the TQABC formula for another 10 consecutive days,while those in the control group will receive CHEP formula placebo and TQABC formula placebo *** primary outcome measure will be the comparison of the change in the National Institutes of Health Stroke Scale score from baseline to 15 days after *** secondary outcome measures will include the scores on the modified Rankin Scale,Barthel Index,Patient-Reported Outcomes,TCM symptom pattern(Zheng-hou)evaluation Scale,and the incidence of in-hospital *** assessment will include the physical examination,laboratory detection,any adverse events or serious adverse events,and the proportion of any complications during ***:The results of this study will provide objective and scientific data with which to assess the efficacy and safety of a sequential treatment based on“integrating disease and symptom pattern”for patients with AIS.

关键词： stroke clearing heat and eliminating phlegm tonifying Qi and activating blood circulation randomized controlled trial clinical protocols

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新能源电力系统概率预测理论与方法及其应用

电力系统自动化 2021年第1期45卷 2-16页

作者：万灿宋永华浙江大学电气工程学院浙江省杭州市310027 智慧城市物联网国家重点实验室(澳门大学) 中国澳门

高比例新能源已成为中国电力系统发展的突出特征,间歇性新能源发电的不确定性给电力系统安全与经济运行带来极大挑战。准确可靠的供需预测是新能源电力系统分析与运行控制的基础,传统确定性预测难以消除预测误差,概率预测可实现对预测... 详细信息

高比例新能源已成为中国电力系统发展的突出特征,间歇性新能源发电的不确定性给电力系统安全与经济运行带来极大挑战。准确可靠的供需预测是新能源电力系统分析与运行控制的基础,传统确定性预测难以消除预测误差,概率预测可实现对预测不确定性的有效量化,为电力系统分析与运行控制提供关键信息支撑。文中对新能源电力系统概率预测理论与方法及应用进行了系统综述:首先,从预测对象、时间尺度、概率预测形式、性能评价指标等方面介绍了新能源电力系统概率预测的基本概念;其次,系统综述了新能源电力系统概率预测的基本理论与方法;然后,总结了概率预测在新能源电力系统中的多场景应用;最后,对新能源电力系统概率预测存在的问题做了归纳,并对其发展趋势进行了展望。

关键词：电力系统可再生能源概率预测区间预测不确定性人工智能