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1、哈尔滨理工大学学士学位论文直流输电综述摘要直流输电技术不仅能够实现比交流输电技术更为经济的电能大容量远距离的传送，而且能用于两区域电网非同步互连与不同频率电网互连，也可通过控制实现功率的紧急援助、抑制低频振荡、提高交流系统的动态稳定性等。目前，随着我国“西电东送、南北互供、全国联网”战略方针的实施，发展直流输电技术，加快建设超、特高压直流输电系统已成为必然趋势。本文首先概述了直流输电技术的发展历程和在我国的发展状况，并列举一系列我国已经投运的直流输电工程，然后介绍了直流输电的运行方式、主要设备及其功能、6脉动和12脉动换流装置的工作原理和直流输电系统的运行方式等，并且
2、简要介绍了强迫换流换相技术、光触发晶闸管技术与轻型直流输电技术三种直流输电领域的新技术。最后，针对我国资源分布与电力负荷分布不均衡的国情，提出在电力网中建设特高压直流输电系统是促使我国实现能源优化配置，进一步降低输电损耗，提高输电效率与提高电网稳定性的重要手段。关键词：直流输电；输电损耗；运行方式；稳定性-IV-哈尔滨理工大学学士学位论文TheintroductionofDCtransmissionAbstractDCtransmissiontechnologycannotonlyrealizetheexchangeandtransmissiontechnologym
3、orethaneconomicpowercapacityofthedistanttransmitted,andcanbeusedtotworegionalnetworkofasynchronousinterconnectionanddifferentfrequencypowernetworkinterconnection,alsocancontrolthepoweroftheemergencyaid,realizelowfrequencyoscillationimprovementofcommunication,suppressionofsystemdynamicst
4、ability,etc.Now,alongwithourcountry's"powertransmissionfromwesttoeast,northandsouthtosendeachotherforandnationwidenetwork"strategicpolicyimplementation,developmentDCtransmissiontechnology,speeduptheconstructionofthesuper,specialHVDCtransmissionsystemhasbecomeaninevitabletrend.Thispaperf
5、irstOutlinesHVDCtechnologydevelopmenthistoryandinthedevelopmentofourcountrystatus,andlistsaseriesofourcountryhasbeenputintooperationofHVDCproject,andthenintroducedtheDCtransmissionoperationmode,themainequipmentanditsfunctionandsixpulsingand12pulseconverterdevice'sworkingprincipleandHVDC
6、systemoperationmode,andbrieflyintroducestheforceforchangeintechnology,lightflowtouchThyristorcanaltechnologyandlightDCtransmissiontechnologythreedctransmissionareasofnewtechnology.Finally,inviewofChina'sresourcesdistributionandpowerloadunevendistributionwiththesituationofourcountry,puts
7、forwardtheconstructionofultra-highvoltagegridistomakeourcountryHVDCsystemrealizetheenergyoptimizationallocation,furtherreducethetransmissionloss,improvethetransmissionefficiencyandimprovethesafeandtransmissionlossoperationofthegrid.Keywords:DCtransmission;transmissionloss;worki
