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Research on Fault Diagnosis Technology and Fault-Tolerant Control Strategy of Direct-Drive Permanent Magnet Synchronous Wind Turbine Generators 认领 引用
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作者 ZHAO Yun TIAN Ru 《外文科技期刊数据库（文摘版）工程技术》 2026年第1期057-061,共5页
With the growing global demand for clean energy, wind power, as an important form of renewable energy generation, has been widely applied. Direct-drive permanent magnet synchronous wind turbine generators have become ... With the growing global demand for clean energy, wind power, as an important form of renewable energy generation, has been widely applied. Direct-drive permanent magnet synchronous wind turbine generators have become a research hotspot in the wind power field due to their advantages such as high efficiency and low maintenance costs. However, under complex and variable operating environments, direct-drive permanent magnet synchronous wind turbine generators inevitably suffer from various faults, which seriously affect the reliability and stability of wind power generation systems. This paper conducts an in-depth study on the fault diagnosis technology and fault-tolerant control strategy of direct-drive permanent magnet synchronous wind turbine generators, analyzes the common fault types and causes of generators, investigates multiple fault diagnosis methods, and proposes corresponding fault-tolerant control strategies. The research aims to improve the fault diagnosis accuracy and fault tolerance of direct-drive permanent magnet synchronous wind turbine generators, and ensure the reliable operation of wind power generation systems. 展开更多
关键词 Direct-drive permanent magnet synchronous wind turbine generato Fault diagnosis technology Fault-tolerant control strategy Wind power generation system
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Submersible direct-drive progressing cavity pump rodless lifting technology 认领 引用 被引量：6
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作者 HAO Zhongxian ZHU Shijia +4 位作者 PEI Xiaohan HUANG Peng TONG Zheng WANG Benyuan LI Deyin 《Petroleum Exploration and Development》 SCIE 2019年第3期621-628,共8页
Submersible electrical motor direct-drive progressing cavity pump (PCP) rodless lifting was studied to solve the traditional rod-drive pump problems, such as rod-tubing wearing, low efficiency and short running time. ... Submersible electrical motor direct-drive progressing cavity pump (PCP) rodless lifting was studied to solve the traditional rod-drive pump problems, such as rod-tubing wearing, low efficiency and short running time. The theoretical researches and laboratory experiments of key tools such as submersible motor and the construction technology of lifting system were introduced. The field application and economic benefit were analyzed and compared with the traditional rod pumping unit. A new low speed and large torque permanent magnet synchronous motor was developed. This motor was used to drive PCP without gear reducer, which improved the reliability and feasibility. It can run at the speed from 50 to 500 r/min with stepless speed regulation, and it can perform high efficiency and large torque. Besides, other key supporting tools, such as motor protector and flex shaft, were developed. The submersible electrical motor direct- drive PCP technology can be used in a 139.7 mm (5.5 in) casing well, with daily output ranging from 5 to 50 m3. Until now, the technology has been deployed more than 100 wells. The field application results show that it eliminates the rod-tubing wearing and saves electric energy by more than 30% compared with the traditional rod pumping unit. And it also makes the oil produced in a safe and environmental friendly way. 展开更多
关键词 rodless artificial lift submersible motor direct-drive progressing cavity pump submersible motor artificial lift
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First polar direct-drive exploding-pusher target experiments on the ShenGuang laser facility 认领 引用
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作者 Bo Yu Jiamin Yang +20 位作者 Tianxuan Huang Peng Wang Wanli Shang Xiumei Qiao Xuewei Deng Zhanwen Zhang Zifeng Song Qi Tang Xiaoshi Peng Jiabin Chen Yulong Li Wei Jiang Yudong Pu Ji Yan Zhongjing Chen Yunsong Dong Wudi Zheng Feng Wang Shaoen Jiang Yongkun Ding Jian Zheng 《Chinese Physics B》 SCIE EI CAS CSCD 2019年第9期288-294,共7页
Low density and low convergence implosion occurs in the exploding-pusher target experiment, and generates neutrons isotropically to develop a high yield platform.In order to validate the performance of ShenGuang(SG) l... Low density and low convergence implosion occurs in the exploding-pusher target experiment, and generates neutrons isotropically to develop a high yield platform.In order to validate the performance of ShenGuang(SG) laser facility and test nuclear diagnostics, all 48-beam lasers with an on-target energy of 48 kJ were firstly used to drive room-temperature, DT gas-filled glass targets.The optimization has been carried out and optimal drive uniformity was obtained by the combination of beam repointing and target.The final irradiation uniformity of less than 5% on polar direct-drive capsules of 540 μm in diameter was achieved, and the highest thermonuclear yield of the polar direct-drive DT fuel implosion at the SG was 1.04 × 1013.The experiment results show neutron yields severely depend on the irradiation uniformity and laser timing,and decrease with the increase of the diameter and fuel pressure of the target.The thin CH ablator does not impact the implosion performance, but the laser drive uniformity is important.The simulated results validate that the cos γ distribution laser design is reasonable and can achieve a symmetric pressure distribution.Further optimization will focus on measuring the symmetry of the hot spot by self-emission imaging, increasing the diameter, and decreasing the fuel pressure. 展开更多
关键词 polar direct-drive exploding-pusher target neutron yield irradiation uniformity
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Research on Slot-pole Combination in High-power Direct-drive PM Vernier Generator for Fractional Frequency Transmission System 认领 引用 被引量：5
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作者 Zhidong Yuan Shaofeng Jia +2 位作者 Deliang Liang Xiuli Wang Yong Yang 《CES Transactions on Electrical Machines and Systems》 CSCD 2022年第4期445-453,共9页
Offshore wind energy is an important part of clean energy,and the adoption of wind energy to generate electricity will contribute to the implementation of the carbon peaking and carbon neutrality goals.The combination... Offshore wind energy is an important part of clean energy,and the adoption of wind energy to generate electricity will contribute to the implementation of the carbon peaking and carbon neutrality goals.The combination of the fractional frequency transmission system(FFTS) and the direct-drive wind turbine generator will be beneficial to the development of the offshore wind power industry.The use of fractional frequency in FFTS is beneficial to the transmission of electrical energy,but it will also lead to an increase in the volume and weight of the generator,which is unfavorable for wind power generation.Improving the torque density of the generator can effectively reduce the volume of the generators.The vernier permanent magnet machine(VPM) operates on the magnetic flux modulation principle and has the merits of high torque density.In the field of electric machines,the vernier machine based on the principle of magnetic flux modulation has been proved its feasibility to reduce the volume and weight.However,in the field of low-speed direct-drive machines for high-power fractional frequency power generation,there are still few related researches.Therefore,this paper studies the application of magnetic flux modulation in fractional frequency and high-power direct-drive wind turbine generators,mainly analyzes the influence of different pole ratios and different pole pairs on the generator,and draws some conclusions to provide reference for the design of wind turbine generators. 展开更多
关键词 Direct-drive wind turbine generators Fractional frequency transmission system Pole ratio The magnetic flux modulation Vernier machine
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Review of Low-speed High-torque Permanent Magnet Direct-drive Motors 认领 引用
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作者 Sijia Sun Siyang Yu +2 位作者 Yue Zhang Yongda Song Fengge Zhang 《Chinese Journal of Electrical Engineering》 EI CSCD 2026年第1期216-239,共24页
Low-speed high-torque transmission systems are widely employed in applications such as mining equipment and marine propulsion.However,the commonly used drive method,combining a conventional-speed induction motor with ... Low-speed high-torque transmission systems are widely employed in applications such as mining equipment and marine propulsion.However,the commonly used drive method,combining a conventional-speed induction motor with a reduction gearbox,results in increased system size,higher maintenance costs,and reduced reliability and operational efficiency.These limitations hinder its further development and broader application.As a result,direct-drive technology has emerged as the developmental trend and inevitable choice for low-speed high-torque transmission systems.The permanent magnet synchronous motor(PMSM)is particularly well-suited for low-speed direct drive applications due to its straightforward design,exceptional reliability,high efficiency,and excellent power factor.Domestic and international literature on the development history and fundamental structural features of low-speed high-torque permanent magnet direct-drive motors(LHPMDMs)is reviewed.In-depth research has addressed several persistent issues in LHPMDMs,including large volume,insufficient torque stability,high production costs,air gap eccentricity,and demagnetization.To tackle these challenges,solutions are proposed through new topologies,novel processes,advanced cooling systems,parameter optimization techniques,and online detection technology.Furthermore,the practical application and promotion of LHPMDMs are summarized.Finally,based on the current state of research,unresolved challenges and potential future development directions for LHPMDMs are discussed prospectively. 展开更多
关键词 Low-speed high-torque permanent magnet direct-drive motor torque density torque pulsation low-cost design air gap eccentricity
Variable-Flux Outer-Rotor Permanent Magnet Synchronous Motor for In-Wheel Direct-Drive Applications 认领 引用 被引量：3
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作者 Yaojing Feng Fang Li +1 位作者 Shoudao Huang Ning Yang 《Chinese Journal of Electrical Engineering》 EI CSCD 2018年第1期28-35,共8页
In-wheel direct-drive is the most efficient driving mode for electric vehicles,and it is the trend for applications in the future.In this paper,a novel variable-flux outer-rotor permanent magnet synchronous motor with... In-wheel direct-drive is the most efficient driving mode for electric vehicles,and it is the trend for applications in the future.In this paper,a novel variable-flux outer-rotor permanent magnet synchronous motor with a hybrid magnetic structure design is developed.Due to the hybrid magnetic pole with Nd-Fe-B and Al-Ni-Co permanent magnet(PM),the air-gap flux can be adjusted by changing the magnetization states of Al-Ni-Co PM,which is beneficial to realize a wide range of speeds and loads from the electromagnetic structure design.Firstly,basic structure features of the motor and the flux-adjusting principle are introduced.The design and calculation method of the PM dimensions is derived based on magnetic circuit analysis.Then the Preisach hysteresis model of Al-Ni-Co PM is described and is adopted to analyze the motor performance with the coupling of the time step finite element method(FEM),and the magnetization are investigated.Finally,the operational performance of the proposed motor is obtained by simulation,which verifies the design. 展开更多
关键词 Outer-rotor permanent magnet synchronous motor variable flux in-wheel direct-drive magnetization finite element method
Overview of condition monitoring and operation control of electric power conversion systems in direct-drive wind turbines under faults 认领 引用 被引量：1
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作者 Shoudao HUANG Xuan WU +2 位作者 Xiao LIU Jian GAO Yunze HE 《Frontiers of Mechanical Engineering》 SCIE CSCD 2017年第3期281-302,共22页
Electric power conversion system （EPCS）, which consists of a generator and power converter, is one of the most important subsystems in a direct-drive wind turbine （DD-WT）. However, this component accounts for the ... Electric power conversion system （EPCS）, which consists of a generator and power converter, is one of the most important subsystems in a direct-drive wind turbine （DD-WT）. However, this component accounts for the most failures （approximately 60% of the total number） in the entire DD-WT system according to statistical data. To improve the reliability of EPCSs and reduce the operation and maintenance cost of DD-WTs, numerous researchers have studied condition monitoring （CM） and fault diagnostics （FD）. Numerous CM and FD techniques, which have respective advantages and disadvantages, have emerged. This paper provides an overview of the CM, FD, and operation control of EPCSs in DD-WTs under faults. After introducing the functional principle and structure of EPCS, this survey discusses the common failures in wind generators and power converters; briefly reviewed CM and FD methods and operation control of these generators and power converters under faults; and discussed the grid voltage faults related to EPCSs in DD-WTs. These theories and their related technical concepts are systematically discussed. Finally, predicted development trends are presented. The paper provides a valuable reference for developing service quality evaluation methods and fault operation control systems to achieve high-performance and high-intelligence DD-WTs. 展开更多
关键词 direct-drive wind turbine electric power conversion system condition monitoring fault diagnosis,operation control under faults fault tolerance
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Accurate 3D Thermal Network Development for Direct-drive Outer-rotor Hybrid-PM Flux-switching Generator 认领 引用 被引量：1
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作者 Ali Zarghani Mohammad Farahzadi +1 位作者 Aghil Ghaheri Karim Abbaszadeh 《Chinese Journal of Electrical Engineering》 EI CSCD 2024年第2期80-92,共13页
Heat and thermal problems are major obstacles to achieving high power density in compact permanent magnet(PM)topologies.Consequently,a comprehensive,accurate,and rapid temperature rise estimation method is required fo... Heat and thermal problems are major obstacles to achieving high power density in compact permanent magnet(PM)topologies.Consequently,a comprehensive,accurate,and rapid temperature rise estimation method is required for novel electric machines to ensure safe and reliable operations.A unique three-dimensional(3D)lumped parameter thermal network(LPTN)is presented for accurate thermal modeling of a newly developed outer-rotor hybrid-PM flux switching generator(OR-HPMFSG)for direct-drive applications.First,the losses of the OR-HPMFSG are calculated using 3D finite element analysis(FEA).Subsequently,all machine components considering the thermal contact resistance,anisotropic thermal conductivity of materials,and various heat flow paths are comprehensively modeled based on the thermal resistances.In the proposed 3-D LPTN,internal nodes are considered to predict the average temperature as well as the hot spots of all active and passive components.Experimental measurements are performed on a prototype OR-HPMFSG to validate the efficiency of the 3-D LPTN.A comparison of the results at various operating points between the developed 3-D LPTN,experimental test,and FEA indicates that the 3-D LPTN quickly approximates the hotspot and mean temperature of all components under both transient and steady states with high accuracy. 展开更多
关键词 Direct-drive wind turbine hybrid-PM flux switching generator lumped parameter thermal network temperature estimation 3D thermal modeling
直驱风电场经柔直外送系统振荡特性及控制环节动态交互作用研究 认领 引用 被引量：2
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作者 马燕峰 韩珊珊 +2 位作者 王子建 李然 赵书强 《电工技术学报》 EI CSCD 北大核心 2026年第5期1526-1542,共17页
电力系统呈现高比例新能源和电力电子设备的发展趋势,大容量远距离的风电外送结构给电网带来了振荡风险。针对直驱风电场经柔性直流(简称柔直)输电外送系统存在的振荡问题,其内部环节间交互作用对系统稳定特性的影响尚未明确。该文首先... 电力系统呈现高比例新能源和电力电子设备的发展趋势,大容量远距离的风电外送结构给电网带来了振荡风险。针对直驱风电场经柔性直流(简称柔直)输电外送系统存在的振荡问题,其内部环节间交互作用对系统稳定特性的影响尚未明确。该文首先建立互联系统的小信号模型,通过参与因子确定各模态的主导模块及引发振荡的关键因素;其次,建立考虑带宽约束条件的阻抗模型,解析系统间交互作用产生振荡的机理;最后采用开环传递函数因子分解法将阻抗模型转换为控制器因子相乘的形式,推导出可以显式表述控制环节交互作用本质的系统阻抗解析表达式,进而揭示风机锁相环、各控制环节与柔直控制间的交互作用对次同步及中频振荡的失稳机理,同时分析有功功率以及主电路参数对控制环节交互作用的影响效果,并利用PSCAD/EMTDC仿真验证阻抗模型及机理分析的正确性。 展开更多
关键词 直驱风电场 柔性直流输电 阻抗模型 稳定性评估 交互作用
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Mechanism Analysis and Detection Methods of Voltage Fluctuation under Wide-Band Oscillation 认领 引用
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作者 Guofeng Zhuang Xiuzhen Zhao +2 位作者 Xuemei Luo Shibin Chen Xujun Zhang 《Energy Engineering》 EI 2026年第7期264-286,共23页
This paper investigates voltage fluctuations in direct-drive wind farms induced by wide-band oscillations during grid integration.A sequence impedance model of the wind farm is established,incorporating key components... This paper investigates voltage fluctuations in direct-drive wind farms induced by wide-band oscillations during grid integration.A sequence impedance model of the wind farm is established,incorporating key components such as direct-drive wind turbines,static var generators(SVGs),transformers,and transmission lines.Based on this model,positive-and negative-sequence impedance expressions are derived.The quantitative relationship among voltage fluctuation,system strength(short-circuit ratio,SCR),and power imbalance is formulated,leading to a comprehensive expression that highlights the influence of impedance mismatch between positive and negative sequences on wideband oscillations.Simulation results confirm an approximately linear correlation between voltage fluctuation and power imbalance,and validate the inverse relationship between voltage fluctuation and system strength.Sensitivity analysis and modal participation factor analysis are further conducted to identify the voltage response characteristics under active and reactive power disturbances,revealing that capacitor voltage,q-axis current,and phase-locked loop(PLL)states are the dominant factors driving voltage fluctuations in the wide-band frequency domain.To mitigate these effects,a frequency-weighted adaptive virtual impedance shaping(FW-AVZ)method is proposed for both positive and negative sequences.The method effectively equalizes sequence impedances,improves phase margin,and suppresses voltage fluctuations across a wide frequency range.The findings provide theoretical insights and practical guidance for enhancing voltage stability in direct-drive wind farms under weak grid conditions. 展开更多
关键词 Direct-drive wind farm wide-band oscillation voltage fluctuation sequential impedance modeling power imbalance
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多永磁电机串联驱动刮板输送机机-电耦合建模与试验研究 认领 引用 被引量：1
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作者 张强 王阳 +4 位作者 刘伟 苏金鹏 张润鑫 孙守吉 田莹 《煤炭学报》 EI CAS CSCD 北大核心 2026年第2期1716-1732,共17页
为顺应超长综采工作面的发展趋势,解决传统机头机尾异步驱动系统存在的传动效率低、功率集中、故障率高等缺点,提出了多永磁电机串联驱动刮板输送机新构型。利用离散单元法和Kelvin-Voigt模型构建了多永磁直驱式刮板输送机链传动系统的... 为顺应超长综采工作面的发展趋势,解决传统机头机尾异步驱动系统存在的传动效率低、功率集中、故障率高等缺点,提出了多永磁电机串联驱动刮板输送机新构型。利用离散单元法和Kelvin-Voigt模型构建了多永磁直驱式刮板输送机链传动系统的动力学方程,确定了多永磁直驱式刮板输送机关键技术参数,并计算离散化动力学模型参数,通过永磁同步电机转矩与负载的关系构建了多永磁直驱式刮板输送机机-电耦合模型,在MATLAB/Simulink中建立了多永磁电机串联驱动刮板输送机链传动系统的动力学仿真模型,仿真分析了多永磁电机直驱系统在空载启动、满载运行、冲击载荷等多种工况下永磁同步电机的输出转速、转矩以及刮板链的速度、加速度、张力等动态特性变化规律。随后搭建了小型多永磁电机串联直驱刮板输送机模拟实验台,同步开展了空载启动、带载启动、冲击载荷等多种工况试验,获取了永磁同步电机的动态特性曲线,验证了所建机-电耦合模型的正确性。仿真和试验结果表明:多永磁电机串联直驱系统对于各工况下负载变化具有较快的响应速度,中间驱动在链传动系统中参与动力传递的程度随工况变化;该系统可实现刮板输送机整机链条张力的分段控制,显著降低负载波动对整机链条的冲击影响,可在保证刮板输送机输送能力的前提下减小链条抗拉上限,降低链条自重,减少系统运行能耗,有助于推动矿山装备智能化与能效优化发展。 展开更多
关键词 刮板输送机 多永磁电机协同 机-电耦合模型 动态特性 永磁直驱技术
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直驱风机低电压穿越的电气量特性研究 认领 引用 被引量：1
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作者 赵书强 于佳 +3 位作者 王慧 李亚明 张洪炜 李航 《高压电器》 CAS CSCD 北大核心 2026年第2期119-127,共9页
随着风电渗透率的不断提高,风机的低电压穿越行为影响着电网的安全稳定运行,保证发生故障时风机不切机具有重要的现实意义。建立直驱永磁风机并网数学模型,推导直驱风机低压穿越过程中电压、电流及功率等相关电气量的解析表达式并提出... 随着风电渗透率的不断提高,风机的低电压穿越行为影响着电网的安全稳定运行,保证发生故障时风机不切机具有重要的现实意义。建立直驱永磁风机并网数学模型,推导直驱风机低压穿越过程中电压、电流及功率等相关电气量的解析表达式并提出一种新的无功补偿方案,该方案增加了发出无功,有利于系统电压的恢复,最后运用MATLAB仿真验证了理论研究的正确性以及无功补偿新方案的有效性。 展开更多
关键词 直驱风机 低电压穿越 电气量变化 理论公式 无功补偿
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匹配控制构网型直驱风电机组接入对混合风电场次/超同步振荡的影响机理分析 认领 引用 被引量：1
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作者 高本锋 王秋文 +1 位作者 马龙 姜静雅 《电工技术学报》 EI CSCD 北大核心 2026年第5期1571-1588,共18页
基于匹配控制的构网型直驱风电机组(GFM-DDWT)接入跟网型直驱风电机组(GFLDDWT)并网系统后,GFM-DDWT对形成的混合风电场的阻抗特性与次/超同步振荡的影响机理尚不明确,相关影响因素也尚不明晰。针对该问题,该文首先建立基于匹配控制的GF... 基于匹配控制的构网型直驱风电机组(GFM-DDWT)接入跟网型直驱风电机组(GFLDDWT)并网系统后,GFM-DDWT对形成的混合风电场的阻抗特性与次/超同步振荡的影响机理尚不明确,相关影响因素也尚不明晰。针对该问题,该文首先建立基于匹配控制的GFM-DDWT、GFL-DDWT和交流电网的序阻抗模型,并通过阻抗扫频验证解析模型的准确性;其次推导考虑线路阻抗时阻抗网络的稳定性判定条件,并从阻抗角度揭示GFM-DDWT对混合风电场并网系统次/超同步振荡的影响机理;最后分析不同运行参数下系统稳定性的变化情况。结果表明:接入GFMDDWT能够通过影响电网等效阻抗降低混合风电场互联系统发生次/超同步振荡的风险;在GFMDDWT固定占比下,改变GFL-DDWT锁相环带宽、电压环控制带宽等关键控制参数能够进一步降低次/超同步振荡风险。 展开更多
关键词 匹配控制 混合直驱风电场 阻抗分析法 并网稳定性
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计及不同强度电网的直驱风电机组控制参数稳定域分析 认领 引用 被引量：1
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作者 高本锋 郑展翔 +4 位作者 邓晓洋 王潇 吴林林 刘培鑫 陈宗良 《华北电力大学学报（自然科学版）》 CAS 北大核心 2026年第2期85-98,109,I0013-I0014,共14页
基于阻抗分析法的参数优化控制可有效提升系统稳定性,然而目前直驱风电机组各控制环节的参数稳定范围尚未明确。针对上述问题,首先采用谐波线性化方法,兼顾考虑了机组建模过程中dq轴电压前馈环节以及直流电压环节,建立了直驱风电机组正... 基于阻抗分析法的参数优化控制可有效提升系统稳定性,然而目前直驱风电机组各控制环节的参数稳定范围尚未明确。针对上述问题,首先采用谐波线性化方法,兼顾考虑了机组建模过程中dq轴电压前馈环节以及直流电压环节,建立了直驱风电机组正负序阻抗模型,并结合阻抗扫频法验证了解析模型的准确性。其次,基于阻抗伯德图判据分析了机组并网系统稳定性。进一步采用机组控制器控制带宽和阻尼比参数,结合频域阻抗稳定判据定量分析了直流电压环、锁相环、电流环参数的稳定范围,并分析考虑了不同强度电网对机组参数稳定域的影响。研究结果表明,当电网强度减弱时,机组参数稳定范围均会缩小;当电网强度增强时,机组参数稳定范围均会扩大。最后,通过PSCAD/EMTDC电磁暂态仿真验证了理论分析结果的正确性和有效性。 展开更多
关键词 直驱风电机组 阻抗建模 弱交流电网 参数稳定域
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跟/构网混合直驱风电场小扰动稳定边界分析 认领 引用 被引量：1
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作者 王干尧 吕敬 蔡旭 《电力自动化设备》 EI CSCD 北大核心 2026年第6期147-156,共10页
为明确跟网型与构网型混合直驱风电场的稳定运行条件,基于阻抗分析法研究了跟/构网混合直驱风电场的小扰动稳定边界。建立了计及机侧动态特性的跟/构网型直驱风电机组宽频阻抗模型;基于阻抗稳定性判据分析了混合直驱风电场的稳定特性,... 为明确跟网型与构网型混合直驱风电场的稳定运行条件,基于阻抗分析法研究了跟/构网混合直驱风电场的小扰动稳定边界。建立了计及机侧动态特性的跟/构网型直驱风电机组宽频阻抗模型;基于阻抗稳定性判据分析了混合直驱风电场的稳定特性,推导了系统相位裕度关于构网型直驱风电机组占比和系统阻抗的表达式,揭示了其与构网型直驱风电机组占比、电网短路比及关键控制参数间的约束关系,确定了系统稳定运行边界并提出了一种考虑控制约束与相位裕度的构网型直驱风电机组占比配置方法。结果表明:当短路比为2,构网型直驱风电机组占比高于30%时,系统稳定;同时,增大跟网型直驱风电机组锁相环带宽或减小其电流内环带宽以及减小构网型直驱风电机组直流电压外环带宽均会降低系统稳定裕度,而惯量与阻尼系数对系统稳定性的影响较小。 展开更多
关键词 混合风电场 构网型控制 跟网型控制 直驱风电机组 阻抗建模 小扰动稳定性
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数据驱动的高产额直接驱动薄壳靶设计与实验 认领 引用
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作者 余波 宋仔峰 +15 位作者 李志远 刘品阳 彭晓世 唐琦 刘中杰 邓志刚 崔波 刘祥明 刘永刚 李纪伟 黄天晅 王立锋 吴玉迟 杨冬 杨家敏 赵宗清 《物理学报》 SCIE EI CAS CSCD 北大核心 2026年第12期248-256,共9页
在大型激光装置通过直接驱动薄壳靶内爆发展的中子或带电粒子实验平台,具有高产额、短脉冲、各向同性、准单能等优点,常用于核物理、核天体物理、高能量密度物理等研究.本文提出了一种数据驱动的高产额直接驱动薄壳靶设计方法,结合激光... 在大型激光装置通过直接驱动薄壳靶内爆发展的中子或带电粒子实验平台,具有高产额、短脉冲、各向同性、准单能等优点,常用于核物理、核天体物理、高能量密度物理等研究.本文提出了一种数据驱动的高产额直接驱动薄壳靶设计方法,结合激光功率、波长差、移束策略等优化,十万焦耳激光装置玻璃靶实验的中子产额达到1.00×1014,聚变转换效率达到4.5‰,大幅提升了十万焦耳激光装置的中子产额和聚变转换效率.验证实验结果同时表明:提高激光功率能够显著提高内爆速度、离子温度和中子产额;多色激光能够抑制束间能量转移造成的激光散射,提高能量耦合效率,改善内爆对称性,并提升离子温度和中子产额;不同移束策略对中子产额、离子温度、中子发射区对称性等内爆性能无显著影响. 展开更多
关键词 直接驱动 中子产额 数据驱动
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基于H∞混合灵敏度设计的电机直驱操动机构速度PI控制器研究 认领 引用
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作者 黎卫国 彭翔 +4 位作者 马丽娟 张长虹 李明洋 肖曦 王潇 《电气工程学报》 CSCD 北大核心 2026年第2期153-160,共8页
电机直驱操动机构以伺服控制技术为核心,通过电动机直接驱动高压开关动作,具备传动结构简单、运动特性定制化等优势。然而,传统PI控制器在应对复杂负载扰动时,其鲁棒性和动态响应性能较为有限。针对电机直驱操动机构中因负载扰动导致的... 电机直驱操动机构以伺服控制技术为核心,通过电动机直接驱动高压开关动作,具备传动结构简单、运动特性定制化等优势。然而,传统PI控制器在应对复杂负载扰动时,其鲁棒性和动态响应性能较为有限。针对电机直驱操动机构中因负载扰动导致的调速系统鲁棒性能下降问题,引入H∞混合灵敏度设计方法,并提出一种新的速度PI控制器参数设计方案,通过选择永磁同步电机(Permanent magnet synchronous motor,PMSM)调速系统的不确定性权函数和性能权函数,结合H∞混合灵敏度设计理论,求解出满足鲁棒性和动态性能要求的速度PI控制器参数。仿真及试验验证表明,该方法在速度调节性能方面具有显著提升,较传统控制器参数频域设计方法更具鲁棒性,且适用于工业应用中的电机直驱操动机构系统。 展开更多
关键词 操动机构 电机直驱 PI控制器 H∞混合灵敏度
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基于并联自抗扰VSC的直驱风电场并网系统次同步振荡抑制策略 认领 引用
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作者 张谦 刘新元 +3 位作者 程有深 马燕峰 赵书强 程雪婷 《可再生能源》 CAS CSCD 北大核心 2026年第5期673-680,共8页
针对直驱风电场并网系统次同步振荡(Sub-Synchronous Oscillation, SSO)问题,文章提出了基于并联自抗扰电压源换流器(Voltage Source Converter, VSC)的SSO抑制策略。利用线性自抗扰控制抗干扰能力强、适应性高的优点,使用线性自抗扰控... 针对直驱风电场并网系统次同步振荡(Sub-Synchronous Oscillation, SSO)问题,文章提出了基于并联自抗扰电压源换流器(Voltage Source Converter, VSC)的SSO抑制策略。利用线性自抗扰控制抗干扰能力强、适应性高的优点,使用线性自抗扰控制器替换并联VSC的PI控制模块,对直驱风电场并网系统的SSO扰动进行估计和补偿,且外部扰动对抑制效果影响较小。最后,基于PSCAD/EMTDC仿真对理论分析进行了验证。结果表明,所提并联自抗扰VSC的SSO抑制策略能在不同工况下有效抑制系统的SSO,具有较强的鲁棒性。 展开更多
关键词 直驱风电场 次同步振荡 电压源换流器 线性自抗扰控制
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基于超级电容实现电压源构网与故障穿越的直驱风机控制 认领 引用
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作者 李健 朱介北 +3 位作者 俞露杰 肖迁 黄伟煌 李岩 《电力系统自动化》 EI CSCD 北大核心 2026年第14期68-78,共11页
电压源构网控制可为风电高比例接入电网提供技术保障。然而,现有基于提取转子动能的构网控制方法存在风机转速失稳风险,且受输出电流限制的网侧变流器无法在故障穿越时维持直流电压稳定,进而难以保持其电压源特性。针对以上两个技术挑战... 电压源构网控制可为风电高比例接入电网提供技术保障。然而,现有基于提取转子动能的构网控制方法存在风机转速失稳风险,且受输出电流限制的网侧变流器无法在故障穿越时维持直流电压稳定,进而难以保持其电压源特性。针对以上两个技术挑战,提出了一种针对直驱风机的基于超级电容(SC)实现电压源构网与故障穿越的控制(SGFC)方法。首先,该方法结合SC充放电方程与同步机摇摆方程,实现惯量响应的能量匹配,并结合网侧电压源控制,无需锁相环即可感知电网频率变化;其次,设计故障信号生成模块,可自主将SC由惯量支撑切换至故障穿越模式,在电压故障时,控制SC吸收直流侧两端不平衡能量,并在故障消除后将SC电压恢复至中性点。此外,通过小信号稳定性分析优化了SGFC关键参数。最后,通过硬件在环实验,在频率与电压扰动下对SGFC方法进行了性能评估。结果表明,SGFC方法基于SC这一典型功率型储能器件,综合实现了直驱风机的电压源构网特性、惯量支撑与故障穿越。 展开更多
关键词 直驱风机 超级电容 构网控制 惯量 故障穿越 模式切换
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准直驱关节传动透明度研究的起源、现状与发展趋势 认领 引用
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作者 丁宏钰 石照耀 +3 位作者 张攀 徐航 莫月珠 刘辉华 《哈尔滨工程大学学报》 EI CAS CSCD 北大核心 2026年第6期1350-1358,共9页
近些年产业尝试将准直驱关节应用于人形机器人,但其传动透明度的理论研究不充分,影响其大规模产业化。本文探究了传动透明度的起源,分析传动透明度理论研究、试验与表征的发展现状,提出了准直驱关节传动透明度研究的难点、热点和发展趋... 近些年产业尝试将准直驱关节应用于人形机器人,但其传动透明度的理论研究不充分,影响其大规模产业化。本文探究了传动透明度的起源,分析传动透明度理论研究、试验与表征的发展现状,提出了准直驱关节传动透明度研究的难点、热点和发展趋势。指出下一步研究的方向为:传动透明的建模和参数优化;减速器设计对传动透明度的影响研究;传动透明度全面评价体系建立;准直驱关节与机器人整机综合优化,实现机器人腿部力控透明度。给出了传动透明度明确的定义,阐明了传动透明度的评价指标及评价体系。讨论了传动透明度与本体感知能力、机械阻抗、反向驱动能力、减速器效率、传动比、静态摩擦、动态摩擦和粘性摩擦的关系。本文研究对推动准直驱关节及人形机器人的技术进步和产业落地具有重要意义。 展开更多
关键词 减速器 减速器效率 传动比 机械阻抗 反驱能力 传动透明度 准直驱关节 人形机器人
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