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基于深度学习的城市配电网多级动态重构决策方法

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高电压技术 2024年第4期50卷 1468-1477,I0026,I0027页

作者：姜思远高红均马望王仁浚石铖刘俊勇四川大学电气工程学院成都610065 湖北省电力公司电力科学研究院武汉430077

多级动态重构技术相比于传统全局重构技术更适合用以改善大规模城市配电网的运行经济性,但是随之而来的重构级别识别又成了新问题。由此,该文依托现有的多级动态重构数学模型,提出一种基于深度学习算法的城市配电网多级动态重构决策方法... 详细信息

多级动态重构技术相比于传统全局重构技术更适合用以改善大规模城市配电网的运行经济性,但是随之而来的重构级别识别又成了新问题。由此,该文依托现有的多级动态重构数学模型,提出一种基于深度学习算法的城市配电网多级动态重构决策方法,可跨过级别识别过程直接实现输入净负荷数据与最优重构决策方案之间的非线性映射。建立了将特征空间注意力机制、时间序列注意力机制、卷积神经网络与门控循环单元相结合的组合神经网络,针对城市配电网净负荷数据时空分布不均衡的特性,采用特征空间注意力机制与卷积神经网络对整个配电网的净负荷数据进行空间特征的学习以感知其高维特征空间的潜在联系。接着采用门控循环单元与时间序列注意力机制来充分挖掘净负荷数据在长时间尺度下的时序特征,提取其在时间分布上的不平衡特征,充分训练所提组合神经网络以拟合现有数学模型。最后,通过实际的145节点系统、IEEE 33节点系统、PG&E 69节点系统进行算例分析,验证了所提方法的有效性。

关键词：城市配电网多级动态重构时空分布不均衡组合神经网络双重注意力机制

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计及需求响应的虚拟电厂日前市场交易策略研究

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智慧电力 2024年第7期52卷 64-71页

作者：王浩丞高红均王仁浚四川大学电气工程学院四川成都610065

虚拟电厂作为分布式资源的聚合体,可以参与电能量市场与调峰市场交易。提出一种虚拟电厂参与能量与调峰市场的交易策略。首先,构建虚拟电厂参与能量与调峰市场的交易框架。然后,构建了柔性负荷的能量-调峰响应模型,并针对柔性负荷中的... 详细信息

虚拟电厂作为分布式资源的聚合体,可以参与电能量市场与调峰市场交易。提出一种虚拟电厂参与能量与调峰市场的交易策略。首先,构建虚拟电厂参与能量与调峰市场的交易框架。然后,构建了柔性负荷的能量-调峰响应模型,并针对柔性负荷中的可转移负荷提出一种计及峰谷转移偏差的阶梯型补偿需求响应机制,目的在于引导可转移负荷参与需求响应的同时提高虚拟电厂在调峰市场中的收益。最后,构建虚拟电厂与柔性负荷之间的主从博弈模型,采用粒子群算法与Gurobi相结合的方法求解虚拟电厂利润与柔性负荷用电成本的纳什均衡。算例表明,所提需求响应机制能够充分挖掘可转移负荷的响应潜力,并增加虚拟电厂在日前市场中的利润。

关键词：虚拟电厂需求响应峰谷转移偏差日前市场

虚拟电厂两阶段准线型需求响应优化及收益共享-风险共担决策方法

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电网技术 2024年第2期48卷 799-808页

作者：成雨阳高红均王仁浚高艺文刘俊勇四川大学电气工程学院四川省成都市610065 国网四川省电力公司电力科学研究院四川省成都市610041

末端分散式资源的需求响应(demand response,DR)是支撑电力系统灵活调节的重要形式,但末端资源通常规模大且单体容量小,迫切需要虚拟电厂(virtual power plant,VPP)等市场主体进行聚合代理,从而间接参与电网公司的调节服务。聚焦于准线... 详细信息

末端分散式资源的需求响应(demand response,DR)是支撑电力系统灵活调节的重要形式,但末端资源通常规模大且单体容量小,迫切需要虚拟电厂(virtual power plant,VPP)等市场主体进行聚合代理,从而间接参与电网公司的调节服务。聚焦于准线型需求响应这一新兴的响应模式,重点研究VPP内部分散式资源的利益-风险互动协调策略,提出面向准线型DR的VPP两阶段优化及收益共享-风险共担决策方法,构建VPP与电网、内部用户互动协调新模式。首先,在准线型激励下VPP以整体收益最大化为目标,考虑柔性负荷响应积极度与新能源准确度因子,进行日前-日内两阶段DR优化;其次,在收益共享-风险共担决策方法下,VPP与柔性负荷共享准线型激励、与新能源共担不确定性风险,并以改进的Shapley法对内部柔性负荷进行利益分配。仿真结果表明,相较于传统DR,准线型DR给出全时段响应目标,更具有优越性;共享-共担决策吸引柔性负荷参与VPP调节,促使VPP与用户双赢。

关键词：虚拟电厂准线型需求响应收益共享-风险共担改进Shapley

基于一维卷积和图神经网络的配电网故障区段定位方法

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电力系统保护与控制 2024年第17期52卷 27-39页

作者：何小龙高红均黄媛高艺文王仁浚刘俊勇四川大学电气工程学院四川成都610065 国网四川省电力公司四川成都610041

快速、准确地定位故障区段对配电网的安全运行至关重要。传统故障定位方法容错率低、耗费时间长,多数深度学习算法对拓扑变动的泛化性不足。基于此,提出了一种基于一维卷积神经网络(one-dimensional convolutional neural network,1D-C... 详细信息

快速、准确地定位故障区段对配电网的安全运行至关重要。传统故障定位方法容错率低、耗费时间长,多数深度学习算法对拓扑变动的泛化性不足。基于此,提出了一种基于一维卷积神经网络(one-dimensional convolutional neural network,1D-CNN)和图神经网络(graph neural network,GNN)的配电网故障区段定位方法。该方法将配电网原始信息与GNN等深度学习算法相结合进行建模。首先利用基于注意力的时空图卷积网络从不同的时空尺度上对遥测数据进行故障特征提取,使用图注意力网络来融合多源遥信数据。然后,利用1D-CNN来调整特征输出维度以实现节点特征到故障支路的映射。最后,通过增设全连接网络来输出故障区段定位结果。依托于Matlab/Simulink平台搭建10 kV中性点不接地配电网系统进行仿真和测试。结果表明,所提方法具有优越的定位性能,能够灵活适用于各类低、中、高阻性接地故障场景,对系统拓扑变动具有强大的泛化能力以及对故障数据不完备的鲁棒性好。

关键词：配电网故障区段定位一维卷积图神经网络拓扑变动数据不完备

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Allelopathic growth inhibition of Heterosigma akashiwo by the three Ulva spcieces(Ulva Pertusa,Ulva Linza,Enteromorpha intestinalis) under laboratory conditions

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Acta Oceanologica Sinica 2012年第3期31卷 138-144页

作者： wang renjun FENG Lei TANG Xuexi wang Jinhe DONG Shuanglin College of Life Science Qufu Normal UniversityQufu 273165China Marine Ecology Laboratory of Marine Life College Ocean University of ChinaQingdao 266003China Department of Agricultural Engineering Dongying Vocation CollegeDongying 257091China Dongying City Ocean and Fishery Bureau Dongying 257091China

Allelopathic effects of several concentrations of fresh tissue,dry powder and dry tissue of three bloom-forming green macroalgae Ulva pertusa,Ulva linza and Enteromopha intestinalis on the red tide microalga Heterosigma akashiwo were evaluated in microcosms *** effects of macroalgae culture medium filtrate were investigated on *** using initial or semi-continuous filtrate *** studies on the algicidal effects of one aqueous and four organic solvent extracts from the macroalgae on the microalga were carried out to confirm the existence of allelochemicals in the tissue of these *** dry powder of *** was extracted with methanol,and the methanol extracts were partitioned to petroleum ether phase,ethyl acetate phase,butanol phase and distilled phase by liquid-liquid *** bioassays of the activity of every fraction were carried out on *** resultant microcosms assay showed that the growth of *** was strongly inhibited by using fresh tissues,dry powder or dry tissue of these three macroalgae,while aqueous and methanol extracts of both macroalgae had strong inhibitory effects on the growth of ***,and the EC50 values for methanol extract of ***,*** or *** were 0.016,0.028× 10-12 or 0.033× 10-12,*** the other three organic solvent extracts (acetone,ether and chloroform) had no apparent effect on its growth,this suggests that the allelochemicals from these three maeroalgae had relatively high *** activity of petroleum ether phase,ethyl acetate phase,butanol phase and distilled phase of *** methanol extract was carried out on *** indicating that petroleum ether phase and ethyl acetate phase had stronger algicidal effect on *** inhibition effect of the ethyl acetate phase was not as strong as that of petroleum ether phase,and effective concentration of petroleum ether phase was 17 mg/L for ***,no significant al

关键词： allelopathy green tide macroalgae red tide microalga extracts

Gene Clone and Characterization of a Novel Thermostable β-Galactosidase with Transglycosylation Activity from Thermotoga naphthophila RUK-10

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Chemical Research in Chinese Universities 2015年第4期31卷 564-568页

作者： YANG Jingwen DI Xiangjun wang Man GAO renjun Key Laboratory for Molecular Enzymology and Engineering Ministry of Education School of Life Science Jilin University Changchun 130012 P. R. China

We cloned and expressed a new recombinant β-galactosidase（TN0949） from Thermotoga naphthophila RKU-10 with the pET28a（＋） vector system in Escherichia coli BL21（DE3）, and determined its catalytic capability to synthesize alkyl glucosides. The recombinant enzyme was purified to a single band via heat treatment and Ni2＋-NTA affinity chromatography. The molecular mass of the recombinant enzyme was estimated to be 79 kDa with sodium dodecyl sulfate-polyacrylamide gel electrophoresis（SDS-PAGE）. TN0949 can hydrolyze o-nitrophenylβ-D- galactopyranoside at the optimum pH and temperature of 6.5 and 80 ℃, respectively. TN0949 can also hydrolyze lactose at the optimum pH and temperature of 5.2 and 80 ℃, respectively. The Km values for the hydrolyses of o-nitrophenyl fl-D-galactopyranoside and lactose were 0.82 and 83.65 mmol/L, respectively. TN0949 was stable over a wide range of pH（3.0 to 7.0） after 24 h of incubation. The half-lives of TN0949 at 75, 80 and 85 ℃ were 22, 6 and 1.33 h, respectively. The enzyme displayed the capability to use lactose as the transglycosylation substrate to synthesize butyl galactopyranoside and hexyl galactopyranoside, indicating its suitability as a candidate industrial biocatalyst.

关键词： β-Galactosidase Thermostable Transglycosylation

Effect of Anthracene on the Interaction Between Platymonas helgolandica var. tsingtaoensis and Heterosigma akashiwo in Laboratory Cultures

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Journal of Ocean University of China 2015年第1期14卷 105-113页

作者： BI Rong wang You wang renjun LI Wei TANG Xuexi Laboratory of Ecology College of Marine Life Sciences Ocean University of China

Two species of marine phytoplankton, Platymonas helgolandica var. tsingtaoensis and Heterosigma akashiwo, were cul- tivated in bi-algal cultures to investigate the effect of anthracene （ANT） on the interaction between them. Without ANT, H. akashiwo out-competed P. helgolandica at low initial biomass ratios （P. helgolandica （P）： H. akashiwo （H） = 1：4 and 1 ： 1）, but not at the highest （P：H=4：I）. This observation was consistent with the description in Lotka-Volterra two species competition model. It was found that P. helgolandica was excluded at low initial biomass ratios, while the unstable equilibrium between two species was predicted at the highest. For both species, carrying capacity and maximal specific growth rate decreased in bi-algal cultures compared to those in monocultures. H. akashiwo exhibited a higher sensitivity to ANT than P helgolandica. This resulted markedly in a reduced cell den- sity of H. akashiwo but an increased cell density ofP. helgolandica. Carrying capacity ofP. helgolandica was consistently higher in bi-algal cultures with ANT than those without ANT, suggesting that ANT, through the elimination of H. akashiwo, generated the dominance of P helgolandica independently of initial biomass ratios. This study showed a density-dependent effect of harmful alga （H. akashiwo） on dietary alga （P helgolandica）, and indicated that ocean pollutant ANT could induce the succession of marine phytoplankton.

关键词： anthracene interspecific competition phytoplankton population growth

Autonomic Regulation of the Cardiovascular System: Diseases,Treatments, and Novel Approaches

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Neuroscience Bulletin 2019年第1期35卷 1-3页

作者： Zixi Jack Cheng renjun wang Qing-Hui Chen Burnett School of Biomedical Sciences College of MedicineUniversity of Central FloridaOrlandoFL 32816USA Department of Biotechnology School of Life ScienceJilin Normal UniversitySiping 136000China Department of Kinesiology and Integrative Physiology Michigan Technological UniversityHoughtonMI 49931-1200USA

The autonomic nervous system(ANS)integrates the involuntary physiological activities of visceral organs that are vital for *** particular,the ANS controls heart rate,blood pressure,breathing,gastrointestinal contraction and secretion,and electrolyte and fluid *** studies have focused on understanding the neural mechanisms of autonomic dysfunction or neuropathy in pathophysiological states including hypertension,heart failure.

关键词： In ANS Autonomic Regulation of the Cardiovascular System Diseases,Treatments

副球菌(Paracoccus sp.)提取物对米氏凯伦藻(Karenia mikimotoi)的抑制作用

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曲阜师范大学学报（自然科学版） 2024年第4期50卷 105-110页

作者：刘春辰马玉娇高配科王仁君曲阜师范大学生命科学学院山东省曲阜市273165

该文研究了副球菌O-4对米氏凯伦藻的抑藻活性、抑藻途径以及抑藻物质.结果表明,菌株O-4主要通过使藻细胞絮凝、细胞破裂和光合系统损伤实现对米氏凯伦藻生长繁殖的抑制,十九碳烯酸(顺-10)是其产生的主要抑藻活性物质,丰富了对抑藻微生... 详细信息

该文研究了副球菌O-4对米氏凯伦藻的抑藻活性、抑藻途径以及抑藻物质.结果表明,菌株O-4主要通过使藻细胞絮凝、细胞破裂和光合系统损伤实现对米氏凯伦藻生长繁殖的抑制,十九碳烯酸(顺-10)是其产生的主要抑藻活性物质,丰富了对抑藻微生物及其抑藻物质的研究,为微生物防治藻华提供了理论数据.

关键词：米氏凯伦藻副球菌抑藻作用十九碳烯酸(顺-10)

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