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申请号:201911021501.7 公开号:CN110854090A 主分类号:H01L23/427
申请人:【中文】华北电力大学【EN】NORTH CHINA ELECTRIC POWER University 申请日:2019.10.25 公开日:2020.02.28
摘要:【中文】本发明公开了属于散热技术领域的一种电子元器件芯片与薄液膜相变传热的集成装置及集成方法,所述电子元器件芯片与薄液膜相变传热的集成装置由四部分组成,包括真空负压罩、含电子元器件芯片的高效散热装置主体、液体工质腔及其连接管路部件组成;高效散热装置主体包含在真空负压罩中;并从上至下,真空抽气泵、真空负压罩、高效散热装置主体、给液泵、液体工质腔依次串联;在高效散热装置主体中,电子元器件芯片布置在相邻微通孔之间的封装层中;封装层、测温层依次固定在支持层上;电子元器件芯片的高热流密度使液体工质在封装层及电子元器件芯片上表面的超薄液膜产生相变换热,该相变换热即可满足整个电子元器件芯片的散热要求。 【EN】The invention discloses an integrated device and an integrated method for phase change heat transfer of an electronic component chip and a thin liquid film, belonging to the technical field of heat dissipation, wherein the integrated device for phase change heat transfer of the electronic component chip and the thin liquid film consists of four parts, including a vacuum negative pressure cover, a high-efficiency heat dissipation device main body containing the electronic component chip, a liquid working medium cavity and a connecting pipeline part thereof; the high-efficiency heat dissipation device main body is contained in the vacuum negative pressure cover; the vacuum air pump, the vacuum negative pressure cover, the high-efficiency heat dissipation device body, the liquid feeding pump and the liquid working medium cavity are sequentially connected in series from top to bottom; in the high-efficiency heat dissipation device main body, the electronic component chip is arranged in the packaging layer between the adjacent micro through holes; the packaging layer and the temperature measuring layer are sequentially fixed on the supporting layer; the high heat flux density of the electronic component chip enables the liquid working medium to generate phase change heat exchange on the packaging layer and the ultrathin liquid film on the upper surface of the electronic component chip, and the phase change heat exchange can meet the heat dissipation requirement of the whole electronic component chip.
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申请号:201911021503.6 公开号:CN110850164A 主分类号:G01R23/16
申请人:【中文】华北电力大学【EN】NORTH CHINA ELECTRIC POWER University 申请日:2019.10.25 公开日:2020.02.28
摘要:【中文】本发明提出了一种考虑背景谐波电压波动和阻抗变化的多谐波责任划分方法。首先利用相似性测度原理筛选出背景谐波电压波动较小的数据段,再建立公共连接点谐波电压和谐波电流数据组散点图,采用OPTICS算法进行聚类排列,通过有序队列和可达距离选择合适的聚类参数,使采样数据能按系统阻抗值划分成不同簇,最后对不同簇的数据采用偏最小二乘法进行多谐波源责任划分。仿真分析验证了提出方法能够较好的减小背景谐波电压波动和系统阻抗变化给谐波责任划分带来的影响,适用范围更广。 【EN】The invention provides a multi-harmonic responsibility division method considering background harmonic voltage fluctuation and impedance change. The method comprises the steps of firstly screening out a data segment with small background harmonic voltage fluctuation by utilizing a similarity measure principle, then establishing a public connection point harmonic voltage and harmonic current data set scatter diagram, carrying out clustering arrangement by adopting an OPTIC algorithm, selecting proper clustering parameters through an ordered queue and an reachable distance, enabling sampled data to be divided into different clusters according to system impedance values, and finally carrying out multi-harmonic source responsibility division on the data of the different clusters by adopting a partial least square method. Simulation analysis verifies that the method can better reduce the influence of background harmonic voltage fluctuation and system impedance change on harmonic responsibility division, and has wider application range.
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申请号:201911021504.0 公开号:CN110854088A 主分类号:H01L23/367
申请人:【中文】华北电力大学【EN】NORTH CHINA ELECTRIC POWER University 申请日:2019.10.25 公开日:2020.02.28
摘要:【中文】本发明公开了属于散热技术领域的一种采用微纳米超薄液膜相变传热的高效散热装置,该高效散热装置主要包括高效散热装置主体、集气罩、分水槽、抽气管道、多个调节阀以及给水管道组成;其中,抽气管道固定在集气罩上面,高效散热装置主体底面设置分水槽,分水槽与给水管道连通;电子元器件集成块底面固定温度传感器或自带测温层;所述支撑层上设置电子元器件集成块元件座;在元件座的四周延伸出在边界内侧或外侧有许多微孔的翅片。本发明将传统翅片散热与新型薄液膜相变传热过程相结合,对产热的电子元器件进行高效散热。翅片表面会有极薄的液膜,受热后薄液膜会发生相变,这种相变冷却的散热方式,能够大大提高散热极限,散热效果极佳。 【EN】The invention discloses a high-efficiency heat dissipation device adopting micro-nano ultrathin liquid film phase change heat transfer, which belongs to the technical field of heat dissipation and mainly comprises a high-efficiency heat dissipation device main body, a gas collecting hood, a water diversion tank, an air exhaust pipeline, a plurality of regulating valves and a water supply pipeline; wherein, the air exhaust pipeline is fixed on the gas collecting hood, the bottom surface of the main body of the high-efficiency heat radiating device is provided with a water diversion groove, and the water diversion groove is communicated with the water supply pipeline; a temperature sensor or a self-contained temperature measuring layer is fixed on the bottom surface of the electronic component integrated block; the supporting layer is provided with an electronic component integrated block component seat; fins having a plurality of micro-holes formed inside or outside the boundary extend around the element seat. The invention combines the traditional fin heat dissipation with the novel thin liquid film phase change heat transfer process, and carries out high-efficiency heat dissipation on electronic components generating heat. The surface of the fin is provided with an extremely thin liquid film, the phase change of the heated thin liquid film can occur, the phase change cooling heat dissipation mode can greatly improve the heat dissipation limit, and the heat dissipation effect is excellent.
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申请号:201911060195.8 公开号:CN110851765A 主分类号:G06F17/10
申请人:【中文】华北电力大学【EN】NORTH CHINA ELECTRIC POWER University 申请日:2019.11.01 公开日:2020.02.28
摘要:【中文】本发明实施例提供一种渐变流流态下河道糙率的获取方法,包括:根据目标河段的蜿蜒情况和河床包含阻水障碍物的情况,确定目标河段的类型;根据目标河段的类型,获取目标河段糙率的各分量和辅助系数;根据目标河段糙率的各分量和辅助系数,获取目标河段的糙率。本发明实施例提供的渐变流流态下河道糙率的获取方法,根据目标河段的蜿蜒情况和河床包含阻水障碍物的情况,确定目标河段的类型,根据目标河段的类型、该类型河道的水流阻力构成和力学平衡原理,获取目标河段的糙率,能提高获取的渐变流流态下河道糙率的精度。进一步地,由于减少了水力计算中繁重的水力试算工作,获取渐变流流态下河道糙率的步骤更简单、效率更高、耗时更短。 【EN】The embodiment of the invention provides a method for acquiring river roughness in a gradient flow state, which comprises the following steps: determining the type of the target river reach according to the winding condition of the target river reach and the condition that the riverbed contains water-blocking obstacles; acquiring each component and auxiliary coefficient of the roughness of the target river reach according to the type of the target river reach; and acquiring the roughness of the target river reach according to each component of the roughness of the target river reach and the auxiliary coefficient. According to the method for acquiring the river course roughness in the gradual change flow state, provided by the embodiment of the invention, the type of the target river reach is determined according to the meandering condition of the target river reach and the condition that the river bed contains a water-blocking obstacle, the roughness of the target river reach is acquired according to the type of the target river reach, the water flow resistance composition of the river reach of the type and the mechanical balance principle, and the accuracy of the acquired river course roughness in the gradual change flow state can be improved. Furthermore, as the heavy hydraulic pilot calculation work in hydraulic calculation is reduced, the step of acquiring the river course roughness in the gradual flow state is simpler, the efficiency is higher, and the time consumption is shorter.
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申请号:201911074143.6 公开号:CN110854936A 主分类号:H02J3/48
申请人:【中文】华北电力大学【EN】NORTH CHINA ELECTRIC POWER University 申请日:2019.10.31 公开日:2020.02.28
摘要:【中文】本发明提出一种多虚拟同步发电机(VSG)并网系统的功频振荡特性分析方法,将VSG的有功和频率控制环路等效为包含第一和第二P/ω“导纳”的二端网络,全面地描述VSG的功频响应特性;考虑电网阻抗的影响,构建多VSG并联系统的P/ω“导纳”模型;基于节点P/ω“导纳”矩阵,推导出影响并网VSG输出功率的因素,通过传递函数分析当并网VSG数量、电网等效阻抗及惯性常数变化时,多VSG并网系统的功频振荡特性及其变化规律。本发明提出的将VSG有功和频率控制环路等效为包含第一和第二P/ω“导纳”二端网络的建模方法同样适用于采用其它控制方案的VSG,具有模型简单、适用范围广、准确度高的优点,可方便地应用于多VSG并网系统的稳定性、功频振荡特性分析等方面的研究。 【EN】The invention provides a power frequency oscillation characteristic analysis method of a multi-Virtual Synchronous Generator (VSG) grid-connected system, which is characterized in that an active power control loop and a frequency control loop of the VSG are equivalent to a two-end network comprising a first P/omega admittance and a second P/omega admittance, and the power frequency response characteristic of the VSG is comprehensively described; considering the influence of the power grid impedance, constructing a P/omega 'admittance' model of the multi-VSG parallel system; and deducing factors influencing the output power of the grid-connected VSG based on the node P/omega admittance matrix, and analyzing the power frequency oscillation characteristics and the change rule of the multi-VSG grid-connected system when the number of the grid-connected VSG, the equivalent impedance of the power grid and the inertia constant change through a transfer function. The modeling method for enabling the VSG active power and frequency control loop to be equivalent to the VSG with the first P/omega admittance two-end network and the second P/omega admittance two-end network is also suitable for VSGs adopting other control schemes, has the advantages of simple model, wide application range and high accuracy, and can be conveniently applied to the research on the aspects of stability, power frequency oscillation characteristic analysis and the like of a multi-VSG grid-connected system.
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申请号:201911080897.2 公开号:CN110854907A 主分类号:H02J3/38
申请人:【中文】华北电力大学【EN】NORTH CHINA ELECTRIC POWER University 申请日:2019.11.07 公开日:2020.02.28
摘要:【中文】本发明公开了一种通信故障下配电网风电场的协同优化运行方法及系统,协同优化运行方法包括:步骤S1:建立风电出力特性模型,根据风电出力特性模型进行抽样获得样本集合,根据聚类算法对样本集合进行处理获得最优典型场景集合;步骤S2:建立表征脆弱节点和线路对用户影响程度的脆弱度指标,根据脆弱度指标形成综合状态脆弱性指标模型;步骤S3:基于单粒子智能算法获得每一最优典型场景下风电场的出力结果,基于综合状态脆弱性指标模型对多个出力结果进行评价获得最优出力结果。 【EN】The invention discloses a collaborative optimization operation method and a collaborative optimization operation system for a power distribution network wind power plant under a communication fault, wherein the collaborative optimization operation method comprises the following steps: step S1: establishing a wind power output characteristic model, sampling according to the wind power output characteristic model to obtain a sample set, and processing the sample set according to a clustering algorithm to obtain an optimal typical scene set; step S2: establishing a vulnerability index representing the degree of influence of the vulnerable node and the line on the user, and forming a comprehensive state vulnerability index model according to the vulnerability index; step S3: and obtaining the output result of the wind power plant in each optimal typical scene based on a single-particle intelligent algorithm, and evaluating a plurality of output results based on a comprehensive state vulnerability index model to obtain the optimal output result.
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申请号:201911125403.8 公开号:CN110854847A 主分类号:H02J3/00
申请人:【中文】华北电力大学【EN】NORTH CHINA ELECTRIC POWER University 申请日:2019.11.18 公开日:2020.02.28
摘要:【中文】本发明提供了一种基于综合差异值最小的精准负荷控制系统子站选择方法。与一般技术相比,获取精准切负荷系统拓扑信息,基于归一化原则将各参数进行调整,基于综合差异最小原则选择最合适的子站,按照所得最优子站进行最优子站分配。能够有效构建响应时间最短精准负荷控制系统。 【EN】The invention provides a substation selection method of a precise load control system based on minimum comprehensive difference values. Compared with the general technology, the method has the advantages that the topological information of the accurate load shedding system is obtained, all parameters are adjusted based on the normalization principle, the most appropriate substation is selected based on the comprehensive difference minimum principle, and the optimal substation distribution is carried out according to the obtained optimal substation. The accurate load control system with the shortest response time can be effectively constructed.
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申请号:201911125429.2 公开号:CN110856261A 主分类号:H04W72/04
申请人:【中文】华北电力大学【EN】NORTH CHINA ELECTRIC POWER University 申请日:2019.11.18 公开日:2020.02.28
摘要:【中文】本发明提供了一种考虑码间串扰的MIMO‑PLC系统子载波分配方法。本发明在充分考虑不同子载波共用同一输入或输出端产生码间串扰的情况下,采集各子信道的信噪比信息和待分配资源信息,计算误码率门限加权的MIMO‑PLC功率矩阵,基于考虑抑制码间串扰的功率最小准则逐比特分配子载波,按照单输入单输出的分配方法对子载波进行分配,有效提高了MIMO‑PLC系统抗码间串扰的能力。 【EN】The invention provides a subcarrier distribution method of an MIMO-PLC system considering intersymbol interference. Under the condition that different subcarriers share the same input or output end to generate intersymbol interference, the method collects the signal-to-noise ratio information and the resource information to be distributed of each subchannel, calculates the MIMO-PLC power matrix weighted by the bit error rate threshold, distributes the subcarriers bit by bit based on the power minimum criterion considering inhibiting the intersymbol interference, and distributes the subcarriers according to a single-input single-output distribution method, thereby effectively improving the intersymbol interference resistance of the MIMO-PLC system.
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申请号:201911172086.5 公开号:CN110854220A 主分类号:H01L31/032
申请人:【中文】华北电力大学【EN】NORTH CHINA ELECTRIC POWER University 申请日:2019.11.26 公开日:2020.02.28
摘要:【中文】本发明涉及全无机钙钛矿太阳电池技术领域,尤其涉及功能性聚合物在全无机钙钛矿太阳电池中的应用及制备方法和全无机钙钛矿太阳电池。所述功能性聚合物能够抑制钙钛矿晶体缺陷并增加薄膜的疏水性,起到提高电池效率与湿度稳定性的作用。根据实施例的记载,将功能性聚合物应用到全无机钙钛矿电池后得到的电池光电转换效率≥14.01%,所述含功能性聚合物的全无机钙钛矿光吸收层与水产生的接触角均大于未应用功能性聚合物的全无机钙钛矿光吸收层与水产生的接触角,提高了含功能性聚合物的全无机钙钛矿光吸收层的疏水性,进而改善全无机钙钛矿电池的稳定性。 【EN】The invention relates to the technical field of all-inorganic perovskite solar cells, in particular to an application and a preparation method of a functional polymer in an all-inorganic perovskite solar cell and an all-inorganic perovskite solar cell. The functional polymer can inhibit perovskite crystal defects and increase the hydrophobicity of the film, and plays a role in improving the efficiency and humidity stability of the battery. According to the description of the embodiment, the photoelectric conversion efficiency of the cell obtained after the functional polymer is applied to the all-inorganic perovskite cell is not less than 14.01%, the contact angle between the all-inorganic perovskite light absorption layer containing the functional polymer and water is larger than the contact angle between the all-inorganic perovskite light absorption layer without the functional polymer and water, the hydrophobicity of the all-inorganic perovskite light absorption layer containing the functional polymer is improved, and the stability of the all-inorganic perovskite cell is further improved.
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申请号:201910959050.5 公开号:CN110866325A 主分类号:G06F30/20
申请人:【中文】华北电力大学【EN】NORTH CHINA ELECTRIC POWER University 申请日:2019.10.10 公开日:2020.03.06
摘要:【中文】本发明公开了一种基于间接监测数据的设备剩余寿命不完美维护预测方法,包括如下步骤:对设备的物理结构进行分析,识别出能够对设备退化过程进行描述的关键参数;收集监测得到的关键参数退化数据;使用收集所得数据对退化模型的参数进行估计;根据估计的参数值,建立基于间接监测数据的设备剩余寿命不完美维护预测模型;依据建立的预测模型,利用收集到的退化数据对设备剩余寿命进行预测。本发明相较于传统方法降低了试验的经济成本、缩短了研究周期,并且能够更丰富、动态地反映环境对设备的影响,从而提高了考虑不完美维护实际情况下的设备剩余寿命预测的准确度。 【EN】The invention discloses a method for predicting imperfect maintenance of residual service life of equipment based on indirect monitoring data, which comprises the following steps: analyzing the physical structure of the equipment, and identifying key parameters capable of describing the equipment degradation process; collecting monitored key parameter degradation data; estimating parameters of the degradation model using the collected data; establishing an imperfect maintenance prediction model of the residual service life of the equipment based on indirect monitoring data according to the estimated parameter values; and predicting the residual life of the equipment by using the collected degradation data according to the established prediction model. Compared with the traditional method, the method has the advantages that the economic cost of the test is reduced, the research period is shortened, and the influence of the environment on the equipment can be more abundantly and dynamically reflected, so that the accuracy of the prediction of the residual service life of the equipment under the actual condition of considering the imperfect maintenance is improved.
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