受控核聚变 1MW 大功率 GTO 直流斩波器的暂态分析及研究

研究了受控核聚变负载条件下的１ＭＷ大功率ＧＴＯ直流斩波器,并采用ＥＭＴＰ（ＥｌｅｃｒｔｏＭａｇｎｅｔｉｃＴｒａｎｓｉｅｎｔＰｒｏｇｒａｍ）程序对ＧＴＯ的暂态过程进行了动态模拟,同时在ＨＴ－６Ｍ托卡马克装置上成功地进行了实验,为今后大功率ＧＴＯ直流斩波器的设计和使用提供了重要的理论分析和实验经验。     

新型无源能量回馈吸收电路及计算机辅助设计

对一种用于高功率斩波器的新型无源能量回馈吸收电路的理论及其计算机辅助分析作了系统的研究。结合矿山牵引机车用ＧＴＯ斩波器对该无损耗吸收电路进行了电路参数优化设计。给出了２５ｋＷ ＧＴＯ直流功率斩波器的实验结果,结果与理论分析相符。     

绝缘栅双极型晶体管升压斩波器的设计

介绍了一种用大功率绝缘栅极双极型晶体管(IGBT)模块SKM75GA L123D和驱动模块EXB840设计的直流升压斩波器。所设计的高频、大电流斩波器具有输出直流电压纹波小,性能可靠等优点。     

矿用架线电机车牵引新型IGBT斩波器

本文介绍了矿用架线电机车新型ＩＧＢＴ斩波器。斩波器用门极可控的ＩＧＢＴ作为开关器件，省去了晶闸管斩波器的强迫换流电路，提高了系统的可靠性。本文给出了主电路原理图并提出了斩波器所采用的改进缓冲电路参数选择原则，对斩波器的过电流保护问题进行了分析。     

无源无损耗吸收电路的计算机辅助设计及其应用

对功率斩波器用能量回馈到负载型无源无损耗吸收电路计算机辅助分析作了系统的研究。结合矿山牵引机车用GTO斩波器对该吸收电路进行了优化设计。文中给出了GTO直流功率斩波器的实验结果。     

IGBT直流斩波器在工矿电机车的应用

介绍IGBT直流斩波器在工矿电机车上的应用,阐述了IGBT直流斩波器电气传动工作原理、系统结构主要电路及技术特点。提出了今后的发展建议和对老车进行电气传动系统技术更新的好处。     

IGBT直流斩波器在工矿电机车的应用

介绍IGBT直流斩波器在工矿电机车上的应用，阐述了IGBT直流斩波器电气传动工作原理，系统结构及主要电路及技术特点。提出了今后的发展建议及对老车进行电气传动系统技术更新的好处。     

国产300MW火电机组锅炉给水泵和YOT51系列大功率液力耦合器通过鉴定

国产３００ＭＷ火电机组锅炉给水泵和ＹＯＴ５１系列大功率液力耦合器通过鉴定被列入国家“八五”科技攻关重大技术装备的国产３００ＭＷ机组ＤＧ６００－２４０锅炉给水泵和ＹＯＴ５１系列大功率液力耦合器，于１９９３年１２月２０日在上海通过了电力部鉴定。１９９０年...     

150t工矿电机车IGBT直流斩波电气传动系统

本文从150t工矿电机车IGBT直流斩波电气传动系统设计要求出发，阐述了IGBT直流斩波器电气传动系统结构，主要技术指标、电路工作原理及特点。分析了IGBT直流斩波器无吸收回路的技术特征，推导了母线电感的计算公式。介绍了对老车进行电气传动系统技术更新的方案。     

磁浮列车斩波器研究

介绍了典型Ｈ型悬浮斩波器的驱动电路，工作波形以及一些特殊保护措施，并对ＧＴＲ的开关损耗进行了计算和分析。     

Four Quadrant AC-DC GTO Converter-Fed DC Motor Drive

In this paper, comparative study of two schemes of four-quadrant GTO converter-fed DC motor drive is carried out. The schemes considered are (i) a PWM GTO dual converter and (ii) a single PWM GTO converter with a static reversing switch. Both of them offer superior performances compared to conventional line commutated converter-fed DC motor drives. The performances of the two schemes are compared for the case of both open-loop and closed-loop speed control systems. The results are experimentally verified in the laboratory with a 3-hp DC motor.     

海上风电直流耗能装置和保护配合策略研究

首先对基于直流耗能装置的交流故障穿越方案进行了理论分析。根据适合海上风电工程的直流耗能装置的拓扑结构,对该直流耗能装置的工作模式、投退策略进行了分析研究。其次研究了带直流耗能装置的大型海上风电直流保护的范围和分区。确定了直流保护动作策略,重点研究了各个直流保护区的保护配置策略。然后研究了直流耗能装置的投退对直流保护功能的影响。重点研究了直流过电压保护与直流耗能投入电压值的配合策略,直流耗能装置的保护功能设计。最后对上述策略进行了仿真试验验证。     

Enhancement of transient stability by fuzzy logic-controlled SMES considering communication delay

This paper presents a fuzzy logic-controlled superconducting magnetic energy storage (SMES) for the enhancement of transient stability in a multi-machine power system. The control scheme of SMES is based on a pulse width modulation (PWM) voltage source converter (VSC) and a two-quadrant DC–DC chopper using gate-turn-off (GTO) thyristor. Total kinetic energy deviation (TKED) of the synchronous generators is used as the fuzzy input for SMES control. Communication delays introduced in online calculation of the TKED are considered for the actual analysis of transient stability. Global positioning system (GPS) is proposed for the practical implementation of the calculation of the TKED. Simulation results of balanced fault at different points in a multi-machine power system show that the proposed fuzzy logic-controlled SMES is an effective device for transient stability enhancement of multi-machine power system. Moreover, the transient stability performance is effected by the communication delay.     

差动Buck直流斩波器型高频链逆变器研究

分析了直流斩波器型高频逆变电路拓扑和原理特性,设计了一种差动Buck直流斩波器型高频链逆变器,该逆变器以两组隔离型双向Buck直流斩波器为核心,结合了正弦脉宽调制(SPWM)控制,使输出端产生高质量的正弦电压.仿真结果表明,该逆变器具有电路拓扑简洁、双向功率传输、控制方式简单等特点.     

An evaluation of resonant snubbers applied to GTO converters

Aspects of the application of resonant snubber technology to gate-turn-off (GTO) converters are investigated. GTO power switches require snubbing at turn-off when applied in converters. This leads to the extensive use of regenerative snubber circuits in GTO converters due to the difficulties involved in using dissipative snubbers. At present, it is accepted that the repetition switching frequency of GTO pulse-width modulated (PWM) circuits is largely determined by the resettling time of regenerative snubbers. The resonant DC link may be seen as a nondissipative snubber and holds the promise of a faster resettling time. The behavior of GTO devices is investigated under the conditions applied to them by this kind of snubbing and its application in GTO converters. The concept has been demonstrated with 90 A 1200 V GTOs     

电动汽车用DC/DC变换器模糊自整定PI控制

以提高电动汽车控制性能为目标,对电动汽车控制系统的双向DC/DC变换器和电机驱动器的基本组成电路--降压斩波电路和升压斩波电路进行了研究,搭建了DC/DC变换器实验台,设计了模糊自整定PI控制器,并通过实验验证了该控制器的良好控制效果.     

High-current DC choppers in the metals industry

The chopper rectifier system converts AC power to DC power. The system rectifies AC power by utilizing a step-down transformer and unregulated diode rectifier to provide a bulk DC bus. The chopper circuit modulates the current from the bulk DC bus to provide a regulated output. This paper describes how DC-chopper systems have many operational benefits over conventional diode or thyristor rectifiers     

基于PWM交流斩波的高压直流电源

本文提出了一种结构新颖的高压直流电源。该电源主要由两部分构成:交流斩波部分和12脉波整流部分。交流斩波器通过控制占空比方便地调节输出电压,而串联式的二极管12脉波整流器,则可得到高质量的高压直流。控制电路采样高压直流电压作为反馈,经PI调节器调节交流斩波器的占空比。仿真结果表明,该直流电源在输入及负载变化时,能够快速响应、输出稳定。实验结果证明了该方法的可行性。     

基于高频感应加热电源的新型软斩波器研究

介绍一种用于逆变电源功率调节的新型零电压零电流转换(ZVZCT)直流斩波器,克服了传统ZCT斩波器或ZVT斩波器不能零电流开通和负载续流二极管不能软关断的缺点,适合用于以MOSFET为开关器件的高频电源场合。对该变换器的稳定运行情况进行了详细的分析,并进行了仿真验证,仿真结果表明,该ZVZCT软斩波器能可靠地运行在高频场合,能实现较大范围内的电压和功率调节。