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POWER FLOW ANALYSIS AND APPLICATION SIMULATION OF ELECTROMAGNETIC CONTINUOUSLY VARIABLE TRANSMISSION 认领 引用 被引量:3
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作者 LUO Yutao TAN Di MENG Fanzhen 《Chinese Journal of Mechanical Engineering》 SCIE EI CAS 2008年第6期48-56,共9页
With the structure of two air gaps and two rotors, the electromagnetic continuously variable transmission(EMCVT) is a novel power-split continuously variable transmission(CVT). There are two kinds of power flowing... With the structure of two air gaps and two rotors, the electromagnetic continuously variable transmission(EMCVT) is a novel power-split continuously variable transmission(CVT). There are two kinds of power flowing through the EMCVT, one is mechanical power and the other is electric power. In the mean time, there are three power ports in the EMCVT, one is the outer rotor named mechanical power port and the other two are the inner rotor and the stator named electric power ports. The mechanical power port is connected to the driving wheels through the final gear and the electric ports are connected to the batteries through the transducers. The two kinds of power are coupled on the outer rotor of the EMCVT. The EMCVT can be equipped on the conventional vehicle being regarded as the CVT and it also can be equipped on the hybrid electric vehicle(HEV) as the multi-energy sources assembly. The power flows of these two kinds of applications are analysed. The back electromotive force(EMF) equations are illatively studied and so the dynamic mathematic model is theorized. In order to certify the feasibility of the above theories, three simulations are carried out in allusion to the above two kinds of mentioned applications of the EMCVT and a five speed automatic transmission(AT) vehicle. The simulation results illustrate that the efficiency of the EMCVT vehicles is higher than that of the AT vehicle owed to the optimized operation area of the engine. Hence the fuel consumption of the EMCVT vehicles is knock-down. 展开更多
关键词 Electromagnetic continuously variable transmission Power flow analysis back electromotive force application simulation
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POWER FLOW ANALYSIS FOR THE FINITE CONTINUOUS ISOLATION SYSTEMS 认领 引用 被引量:4
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作者 Mao Yinghong,Song Kongjie,Sun Yuguo 《Chinese Journal of Mechanical Engineering》 EI CAS 2001年第3期215-218,共4页
A universal expression for the transmitted power to the flexible foundation via the finite continuous isolation system of asymmetry is derived where the concept of effective mobility for the coupled system with contin... A universal expression for the transmitted power to the flexible foundation via the finite continuous isolation system of asymmetry is derived where the concept of effective mobility for the coupled system with continuous contact points is put forward. On the basis of the theoretic calculation and analysis, effects of structure parameters of the system on the power flow transmission as well as on the isolation efficiency are fully investigated. 展开更多
关键词 Power flow Finite system of asymmetry Continuous isolator
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Solving Load Flow Problems of Power System by Explicit Pseudo-Transient Continuation (E-ψtc) Method 认领 引用
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作者 Tianmin Han Yuhuan Han 《Energy and Power Engineering》 2016年第2期99-115,共17页
This paper is a further study of two papers [1] and [2], which were related to Ill-Conditioned Load Flow Problems and were published by IEEE Trans. PAS. The authors of this paper have some different opinions, for exam... This paper is a further study of two papers [1] and [2], which were related to Ill-Conditioned Load Flow Problems and were published by IEEE Trans. PAS. The authors of this paper have some different opinions, for example, the 11-bus system is not an ill-conditioned system. In addition, a new approach to solve Load Flow Problems, E-&psi;tc, is introduced. It is an explicit method;solving linear equations is not needed. It can handle very tough and very large systems. The advantage of this method has been fully proved by two examples. The authors give this new method a detailed description of how to use it to solve Load Flow Problems and successfully apply it to the 43-bus and the 11-bus systems. The authors also propose a strategy to test the reliability, and by solving gradient equations, this new method can answer if the solution exists or not. 展开更多
关键词 Load Flow Problems of Power System Ill-Conditioned System Normal Newton Method Optimal Multiplier Method Brown Method Explicit Pseudo-Transient Continuation (E-ψtc) 11-Bus and 43-Bus Systems Reliability Gradient Equation
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Semi-Implicit Continuous Newton Method for Power Flow Analysis 认领 引用 被引量:1
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作者 Ruizhi Yu Wei Gu +2 位作者 Yijun Xu Shuai Lu Suhan Zhang 《CSEE Journal of Power and Energy Systems》 SCIE EI CSCD 2025年第4期1957-1961,共5页
As an effective emulator of ill-conditioned power flow,continuous Newton methods(CNMs)have been extensively investigated using explicit and implicit numerical integration algorithms.However,explicit CNMs often suffer ... As an effective emulator of ill-conditioned power flow,continuous Newton methods(CNMs)have been extensively investigated using explicit and implicit numerical integration algorithms.However,explicit CNMs often suffer from non-convergence due to their limited stability region,while implicit CNMs require additional iterative loops to solve nonlinear equations.To address this,we propose a semi-implicit version of CNM.We formulate the power flow equations as a set of differential algebraic equations(DAEs),and solve the DAEs with the stiffly accurate Rosenbrock type method(SARM).The proposed method succeeds the numerical robustness from the implicit CNM framework while prevents the iterative solution of nonlinear systems,hence revealing higher convergence speed and computation efficiency.We develop a novel 4-stage,3rd-order hyper-stable SARM with an embedded 2nd-order formula for adaptive step size control.This design enhances convergence through damping adjustment.Case studies on ill-conditioned systems verify the alleged performance.An algorithm extension for MATPOWER is made available on Github for benchmarking. 展开更多
关键词 Continuous Newton method power flow analysis
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Hydro-mechanical Transmit Performance Analysis for a Continuously Variable Transmission 认领 引用 被引量:1
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作者 Liang He Wanlin Guo Sihong Zhu 《Journal of Food Science and Engineering》 2016年第3期121-131,共11页
Based on an exact CAD model of hydro-mechanical continuously variable transmission (HMCVT) gearbox which can transmit 180 horsepower, virtual prototype of the HMCVT was built. Revolution speed of shafts, gears and c... Based on an exact CAD model of hydro-mechanical continuously variable transmission (HMCVT) gearbox which can transmit 180 horsepower, virtual prototype of the HMCVT was built. Revolution speed of shafts, gears and clutches of the HMCVT were calibrated by using results obtained by theoretical calculation and test methods. The needed power and torques of both mechanical power input shaft and hydropower input shaft were calculated by simulation. Hydraulic power distributing ratio and power flow of the system was also studied. The analysis results showed that cycle power was produced inevitably when the output shaft speed of HMCVT change smoothly during mechanical and hydraulic working state HM1 to HM4, and the instantaneous maximum cycle power was 39.5%. Then the overall transmission efficiency of HMCVT was studied, and the maximum overall efficiency of the system was about 87%. The results of the studies gave references to select suited engine and variable displacement pump for the HMCVT, and to develop rational speed control strategies for the HMCVT by changing displacement ratio of variable displacement pump. 展开更多
关键词 Tractor continuously variable transmission displacement ratio rotational speed torque power flow.
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计及虚拟功角暂态稳定约束的构网型光伏接入配电网的承载能力分析 认领 引用 被引量:1
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作者 覃惠玲 陈立才 +2 位作者 李爽 饶志 甘迪 《电力系统及其自动化学报》 CSCD 北大核心 2026年第2期34-46,共13页
高渗透率的构网型光伏接入配电网会影响配电网静态电压和暂态功角稳定性,为了量化其接入配电网的承载能力边界,利用连续潮流法和暂态轨迹灵敏度法对光伏接入配电网的承载能力进行分析。首先建立构网型光伏并网模型,分别基于单参数和多... 高渗透率的构网型光伏接入配电网会影响配电网静态电压和暂态功角稳定性,为了量化其接入配电网的承载能力边界,利用连续潮流法和暂态轨迹灵敏度法对光伏接入配电网的承载能力进行分析。首先建立构网型光伏并网模型,分别基于单参数和多参数连续潮流算法,量化光伏单点接入和多点接入对配电网静态电压的影响,接着采用暂态轨迹灵敏度量化光伏接入容量与虚拟功角暂态稳定的联系,最后构建综合考虑静态电压约束和暂态功角约束的光伏接入承载能力边界,并通过修改后的IEEE 33节点和IEEE 69节点配电网系统验证了所提算法的有效性和通用性。 展开更多
关键词 虚拟同步机控制 单参数连续潮流 多参数连续潮流 暂态轨迹灵敏度 光伏承载能力边界
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考虑风电不确定性的机会约束暂态稳定约束最优潮流 认领 引用
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作者 刘颂凯 王宇杰 +3 位作者 张磊 吴宇恒 艾宇坤 成思鋙 《三峡大学学报(自然科学版)》 CAS 北大核心 2026年第3期86-94,共9页
随着可再生能源渗透率不断提高,电力系统运行不确定性显著增加.为应对风电不确定性对电力系统暂态稳定造成的影响,本文引入机会约束,将新能源出力的不确定性纳入暂态稳定约束最优潮流模型中.通过将传统的暂态稳定约束预防控制转化为机... 随着可再生能源渗透率不断提高,电力系统运行不确定性显著增加.为应对风电不确定性对电力系统暂态稳定造成的影响,本文引入机会约束,将新能源出力的不确定性纳入暂态稳定约束最优潮流模型中.通过将传统的暂态稳定约束预防控制转化为机会约束优化问题,提出一种基于深度西格马点过程(deep Sigma point processes,DSPP)的机会约束暂态稳定预防控制方法,并采用连续域蚁群优化(ant colony optimization for continuous domains,ACOR)算法对控制策略进行迭代更新,以确保新生成的高质量解决方案能够持续替代旧方案.本文所提出的成本最小化方法不仅执行时间较短,还能有效管理能源资源,且在平均值和标准差等统计指标上优于传统方法.同时,ACOR算法在降低电力系统燃料成本的同时,确保了较高的精度和收敛性.最后,通过在IEEE39节点系统上的仿真结果表明,该方法在经济性、收敛稳定性和计算效率方面均优于传统方法. 展开更多
关键词 风电不确定性 机会约束 暂态稳定约束最优潮流 深度西格马点过程 连续域蚁群优化算法
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双边牵引供电系统连续潮流计算方法 认领 引用 被引量:1
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作者 徐立特 张乔 +4 位作者 刘志刚 邓云川 鲁兵 单翔宇 邱海龙 《电力系统保护与控制》 EI CSCD 北大核心 2026年第5期131-143,共13页
随着双边供电模式的广泛应用,牵引供电系统运行特性日趋复杂,对电压稳定性分析提出了更高要求。传统潮流计算在处理异构负荷结构及多变运行条件时,存在建模处理能力有限、精度与稳定性受制约等问题。因此提出一种适用于双边供电系统的... 随着双边供电模式的广泛应用,牵引供电系统运行特性日趋复杂,对电压稳定性分析提出了更高要求。传统潮流计算在处理异构负荷结构及多变运行条件时,存在建模处理能力有限、精度与稳定性受制约等问题。因此提出一种适用于双边供电系统的统一建模潮流计算方法。该方法统一了电网侧三相负荷与牵引侧单相负荷的建模框架,克服了牛顿-拉夫逊法难以获取接触网与钢轨侧负荷功率以及连续线性法精度不足且无法动态更新雅可比矩阵的缺陷。在此基础上构建连续潮流扩展模型,系统分析不同供电模式、线路结构及短路容量变化对运行特性的影响。仿真结果表明,该方法能够准确绘制P-V曲线并确定电压稳定性临界点,在模型通用性、计算精度和工程实用性方面具有显著优势。 展开更多
关键词 牵引供电系统 双边供电 潮流计算 连续潮流计算 电压稳定性
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基于车辆悬架系统功率流分析的改进型SH-ADD控制策略仿真研究 认领 引用
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作者 戴杰 查云飞 +2 位作者 高雄 卢荡 江艺斌 《现代制造工程》 北大核心 2026年第2期83-90,29,共8页
为了降低车辆在全频域内的簧上质量加速度,进而提升车辆的平顺性,对于搭载了连续阻尼控制(Continuous Damping Control,CDC)减振器的半主动悬架,综合连续型天棚阻尼(Skyhook,SH)控制策略与加速度阻尼(Active Dynamic Damper,ADD)控制策... 为了降低车辆在全频域内的簧上质量加速度,进而提升车辆的平顺性,对于搭载了连续阻尼控制(Continuous Damping Control,CDC)减振器的半主动悬架,综合连续型天棚阻尼(Skyhook,SH)控制策略与加速度阻尼(Active Dynamic Damper,ADD)控制策略的优势,基于车辆悬架系统功率流分析,提出了一种兼备SH控制策略与ADD控制策略优势的控制策略,即基于车辆悬架系统功率流分析的改进型SH-ADD控制策略。选用CDC减振器为车辆悬架的半主动部件,同时建立1/4车辆模型,以正弦路面与随机路面作为输入,在Simulink软件中,将提出的控制策略分别与被动悬架以及其他控制策略进行对比,结果表明,基于车辆悬架系统功率流分析的改进型SH-ADD控制策略在降低簧上质量加速度方面具有显著的优越性和有效性,提高了车辆的平顺性。 展开更多
关键词 车辆平顺性 连续阻尼控制 车辆悬架系统 天棚阻尼控制 加速度阻尼控制 功率流分析
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基于改进Matpower连续潮流算法的静态电压稳定性分析 认领 引用 被引量:1
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作者 张宾 《西安文理学院学报(自然科学版)》 2020年第2期25-29,共5页
连续潮流算法通过引入一维校正方程有效地解决了传统潮流在功率极限附近时雅可比矩阵的奇异问题,从而追踪得到负荷不断增加的PV曲线以研究电网系统的静态电压稳定性.基于Matpower程序对连续潮流算法进行改进,通过引入单节点增加负荷以... 连续潮流算法通过引入一维校正方程有效地解决了传统潮流在功率极限附近时雅可比矩阵的奇异问题,从而追踪得到负荷不断增加的PV曲线以研究电网系统的静态电压稳定性.基于Matpower程序对连续潮流算法进行改进,通过引入单节点增加负荷以及多节点等步长增加负荷模式,从而追踪得到该模式下的多节点PV曲线以及崩溃电压值.提出了电压崩溃裕度指标和极限功率裕度,用来表征该节点的电压坚强程度.最后以某地区220kV电网为算例进行分析,验证了该方法的有效性. 展开更多
关键词 连续潮流 静态电压 PV曲线 电压裕度 功率裕度
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基于Matpower潮流算法的电力系统静态电压指标计算分析 认领 引用
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作者 张艳 陈晶 周锐 《佳木斯大学学报(自然科学版)》 CAS 2020年第3期59-62,70,共4页
基于输电线路PI型模型、线路功率传输模型以及两节点系统模型,依据方程有实数解的思想推导了输电线路以及节点的电压稳定性指标计算公式,并借助牛拉潮流计算过程中的潮流、电压以及相角等参数加以程序计算。对某地区220kV电网均值负荷... 基于输电线路PI型模型、线路功率传输模型以及两节点系统模型,依据方程有实数解的思想推导了输电线路以及节点的电压稳定性指标计算公式,并借助牛拉潮流计算过程中的潮流、电压以及相角等参数加以程序计算。对某地区220kV电网均值负荷以及峰值负荷下的系统稳定性进行计算,分析表明该指标能够很好的评估当前系统运行状态,筛选出系统中的薄弱运行环节。 展开更多
关键词 电力系统 连续潮流 牛拉潮流程序 静态电压
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电力系统电压稳定域边界的全纯嵌入搜索方法 认领 引用 被引量:3
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作者 李雪 职梦磊 +1 位作者 姜涛 李国庆 《电力系统自动化》 EI CSCD 北大核心 2025年第10期123-134,共12页
静态电压稳定域(SVSR)从“域”的角度研究电力系统的电压稳定性,可有效计及新能源出力的强波动性和随机性引发的电压稳定性问题。为准确、快速构建SVSR,提出一种基于全纯嵌入法(HEM)的SVSR边界(SVSRB)搜索方法。首先,根据HEM理论提出一... 静态电压稳定域(SVSR)从“域”的角度研究电力系统的电压稳定性,可有效计及新能源出力的强波动性和随机性引发的电压稳定性问题。为准确、快速构建SVSR,提出一种基于全纯嵌入法(HEM)的SVSR边界(SVSRB)搜索方法。首先,根据HEM理论提出一种搜索电压鞍结分岔(SNB)点的电压幅值-有功功率灵敏度全纯嵌入函数判据;其次,将该判据与变步长控制策略相结合,实现单个SNB点的快速、准确搜索;然后,根据SVSRB的拓扑特性,利用已知SNB点信息,借助快速灵活全纯嵌入实现相邻SNB点的高效求解,进而实现多维SVSRB高效搜索;最后,通过WECC 9节点、IEEE 118节点等测试系统算例验证了所提方法可实现SVSRB的快速、精确构建。 展开更多
关键词 电压稳定性 全纯嵌入 连续潮流 鞍结分岔
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高压专线贯通供电系统建模及运行特性分析 认领 引用 被引量:1
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作者 张丽艳 王凡 +1 位作者 李澳 贺昆 《西南交通大学学报》 EI CSCD 北大核心 2025年第5期1303-1314,共12页
高压专线贯通供电系统是一种实现长距离、无分相的新型牵引供电方案.为准确掌握该系统的运行特性,在考虑高压输电线路并联电容和车网耦合关系的基础上,采用二端口网络理论对贯通高压输电网进行简化;同时,通过恒功率负载模拟列车负荷,构... 高压专线贯通供电系统是一种实现长距离、无分相的新型牵引供电方案.为准确掌握该系统的运行特性,在考虑高压输电线路并联电容和车网耦合关系的基础上,采用二端口网络理论对贯通高压输电网进行简化;同时,通过恒功率负载模拟列车负荷,构建高压专线贯通供电系统的潮流等效模型;基于该模型,采用前推回代法实现列车动态潮流计算,并理论分析牵引网电流分配、系统等效阻抗的变化规律及其影响因素;最后,仿真分析在不同工况下牵引网电压分布、牵引变电所功率分配以及空载环流的传输特性.研究结果表明:在轻载运行时,贯通高压输电网采用电缆的方案会导致线路末端电压显著提高;再生列车有助于改善网压水平,并能高效利用再生能量;线路空载时,通过保持各牵引变压器的实际变比一致以及减少贯通高压输电网的长度,可以有效降低空载环流. 展开更多
关键词 电气化铁路 贯通供电 等效模型 潮流计算 空载环流
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A Critical Eigenvalues Tracing Method for the Small Signal Stability Analysis of Power Systems 认领 引用
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作者 Shao-Hong Tsai Yuan-Kang Wu Ching-Yin Lee 《Energy and Power Engineering》 2013年第4期677-682,共6页
The continuation power flow method combined with the Jacobi-Davidson method is presented to trace the critical eigenvalues for power system small signal stability analysis. The continuation power flow based on a predi... The continuation power flow method combined with the Jacobi-Davidson method is presented to trace the critical eigenvalues for power system small signal stability analysis. The continuation power flow based on a predictor- corrector technique is applied to evaluate a continuum of steady state power flow solutions as system parameters change;meanwhile, the critical eigenvalues are found by the Jacobi-Davidson method, and thereby the trajectories of the critical eigenvalues, Hopf bifurcation and saddle node bifurcation points can also be found by the proposed method. The numerical simulations are studied in the IEEE 30-bus test system. 展开更多
关键词 Critical Eigenvalue Trajectory Continuation Power Flow Hopf bifurcation Saddle Node Bifurcation Small Signal Stability Jacobi-Davidson Method
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考虑直流变压器控制与容量约束的直流配电网连续潮流计算 认领 引用 被引量:2
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作者 许晓龙 王强钢 +3 位作者 周亦尧 廖建权 张雪飞 周念成 《电力系统自动化》 EI CSCD 北大核心 2025年第13期83-92,共10页
连续潮流是评估电力系统静态电压稳定性的重要工具之一。现有针对多电压等级直流配电网的连续潮流方法未充分考虑直流变压器(DCT)的控制及容量约束,影响计算结果的精确性。针对双有源桥型DCT,文中提出了一种考虑DCT控制和容量约束的直... 连续潮流是评估电力系统静态电压稳定性的重要工具之一。现有针对多电压等级直流配电网的连续潮流方法未充分考虑直流变压器(DCT)的控制及容量约束,影响计算结果的精确性。针对双有源桥型DCT,文中提出了一种考虑DCT控制和容量约束的直流配电网连续潮流计算方法。首先,通过引入虚拟节点,结合DCT外特性方程建立了不同控制方式下的DCT稳态模型。分析了不同控制方式下DCT移相比与副边负载功率的关系,为连续潮流计算中DCT约束触发后的数学模型转换提供依据。在此基础上,建立了考虑DCT控制和容量约束的连续潮流模型,并提出了由DCT控制和容量约束导致的分岔点及其诱导原因的识别判据。所提方法的有效性在修改后的PG&E 69节点测试系统中得到了验证。 展开更多
关键词 直流配电网 静态电压稳定 连续潮流 直流变压器 双有源桥 控制约束 容量约束
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Distributed continuation power flow method for integrated transmission and active distribution network 认领 引用 被引量:9
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作者 Jinquan ZHAO Xiaolong FAN +1 位作者 Changnian LIN Wenhui WEI 《Journal of Modern Power Systems and Clean Energy》 SCIE EI 2015年第4期573-582,共10页
As the integration of distributed generations(DGs)transforms the traditional distribution network into the active distribution network,voltage stability assessments(VSA)of transmission grid and distribution grid are n... As the integration of distributed generations(DGs)transforms the traditional distribution network into the active distribution network,voltage stability assessments(VSA)of transmission grid and distribution grid are not suitable to be studied separately.This paper presents a distributed continuation power flow method for VSA of global transmission and distribution grid.Two different parameterization schemes are adopted to guarantee the coherence of load growth in transmission and distribution grids.In the correction step,the boundary bus voltage,load parameter and equivalent power are communicated between the transmission and distribution control centers to realize the distributed computation of load margin.The optimal multiplier technique is used to improve the convergence of the proposed method.The three-phase unbalanced characteristic of distribution networks and the reactive capability limits of DGs are considered.Simulation results on two integrated transmission and distribution test systems show that the proposed method is effective. 展开更多
关键词 Integrated transmission and distribution grid Distributed computation Voltage stability Continuation power flow Three-phase distribution network Distribution generation
基于连续潮流的电源结构配置方法研究 认领 引用
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作者 陈甜甜 杜凤青 +2 位作者 罗祾 陈旻昱 艾芊 《电器与能效管理技术》 2025年第4期1-6,40,共6页
合理优化电源结构对于积极稳妥推进“双碳”目标、加快规划建设新型能源体系、推动能源低碳转型具有重要战略意义。面向超大型城市受端电网,提出一种基于连续潮流的电源结构配置模型。首先,对外送电和本地电的比例内涵进行分析;其次,对... 合理优化电源结构对于积极稳妥推进“双碳”目标、加快规划建设新型能源体系、推动能源低碳转型具有重要战略意义。面向超大型城市受端电网,提出一种基于连续潮流的电源结构配置模型。首先,对外送电和本地电的比例内涵进行分析;其次,对涉及该比例的关键因素展开研究;最后,建立外送电和本地电比例区间分析模型,基于连续潮流对最大本地电和最大外送电的接入场景进行求解。仿真结果表明,所建模型能够有效形成合理的比例区间,解决电源结构的配置问题。 展开更多
关键词 电源结构配置 本地电 外送电 配置比例 连续潮流
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双端电磁气吹分段灭弧装置快速熄弧研究 认领 引用 被引量:1
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作者 李雄 杨廷方 +3 位作者 周慧康 杨文超 冯明浩 卓超 《电力工程技术》 CSCD 北大核心 2025年第2期229-238,共10页
针对现有的并联保护间隙不能主动熄灭电弧,导致输电线路供电可靠性下降的问题,提出一种利用工频续流流过线圈产生磁场,通过电磁力带动活塞压缩空气,喷射出高速气流灭弧的方法,设计双端电磁气吹分段灭弧装置。根据磁流体动力学理论建立... 针对现有的并联保护间隙不能主动熄灭电弧,导致输电线路供电可靠性下降的问题,提出一种利用工频续流流过线圈产生磁场,通过电磁力带动活塞压缩空气,喷射出高速气流灭弧的方法,设计双端电磁气吹分段灭弧装置。根据磁流体动力学理论建立有限元仿真模型,并对该装置灭弧过程进行仿真分析。结果表明:该装置产生的灭弧气流最大速度可达330 m/s,从上下两端快速作用于电弧,在高速气流作用下,电弧逐渐变细进而打破动态平衡,电弧弧柱温度在3 ms内下降到2000 K,将电弧通道掐断,从而实现“建弧无通道”的灭弧效果,使电弧在3 ms内快速熄灭,灭弧时间仅为未安装该装置前的9%。因此,该装置可大大缩短灭弧时间,提高电力系统的供电可靠性。 展开更多
关键词 雷电 并联保护间隙 多物理仿真平台 磁流体动力学理论 工频续流 电磁气吹
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Dual-Wavelength Continuous Wave Photoacoustic Doppler Flow Measurement 认领 引用
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作者 Hongcai ZHAO Yanbin LIU +1 位作者 Tayyab FAROOQ Hui FANG 《Photonic Sensors》 SCIE EI CSCD 2022年第1期1-9,共9页
Photoacoustic Doppler flow measurement based on continuous wave laser excitation owns the merit of clearly presenting the Doppler power spectra.Extending this technique to dual wavelengths can gain the spectral inform... Photoacoustic Doppler flow measurement based on continuous wave laser excitation owns the merit of clearly presenting the Doppler power spectra.Extending this technique to dual wavelengths can gain the spectral information of the flow sample extra to the flow speed information.An experimental system with two laser diodes respectively operated at 405 nm and 660 nm wavelengths is built and the flow measurement with black and red dyed polystyrene beads is performed.The measured Doppler power spectra can vividly reflect the flow speed,the flow direction,as well as the bead color.Since it is straightforward to further apply the same principle to multiple wavelengths,we can expect this type of spectroscopic photoacoustic Doppler flow measurement will be developed in the near future which will be very useful for studying the metabolism of the slowly moving red blood cell inside microvessels. 展开更多
关键词 Photoacoustic Doppler Doppler power spectra multispectral photoacoustics flow measurement continuous wave laser
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基于PSAT的电力系统静态电压稳定性分析 认领 引用
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作者 刘闯 于锡平 张师 《电气开关》 2025年第3期92-95,共4页
研究了电力系统电压稳定的分析方法,基于PSAT对系统电压稳定性进行了分析。通过分析可知,提高发电机机端电压可以提高系统的电压稳定性,合理分配发电机的有功出力也可以提高系统的电压稳定性。
关键词 电力系统电压稳定 鞍结分岔点 连续潮流 机端电压 有功出力
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