具有串补电容输电线路距离保护的研究的中期报告.docx

具有串补电容输电线路距离保护的研究的中期报告
Abstract:
Thereportsummarizestheresearchprogressonthedistanceprotectionoftransmissionlineswithseriescompensation.Firstly,theprincipleofseriescompensationanditsinfluenceondistanceprotectionareintroduced.Basedontheanalysisofthecharacteristicsoftheseriescompensationsystemandthelimitationsofthetraditionaldistanceprotectionscheme,anewdistanceprotectionschemeisproposed,whichcaneffectivelyovercomethenegativeeffectofseriescompensationandimprovethedistanceprotectionperformance.Theproposedschemeisbasedontheprincipleofvoltage-phasecomparisonandmeasuresthevoltageandcurrentatbothendsofaprotectedlinesegment.Theprotectionincludestwostagesofoperation,namelytrippingandblocking,whicharedeterminedbyanadaptivecriterion.Theeffectivenessoftheproposedschemeisverifiedbysimulationsandexperiments.
Keywords:seriescompensation,distanceprotection,voltage-phasecomparison,tripping,blocking,adaptivecriterion
摘要：
本文总结了串补电容输电线路距离保护方面的研究进展。首先介绍了串补电容的原理及其对距离保护的影响。基于对串补电容系统特性和传统距离保护方案的限制分析，提出了一种新的距离保护方案，能有效地克服串补电容的负面影响，提高距离保护性能。所提出的方案基于电压相位比较原理，测量保护线路段两端的电压和电流。保护包括跳闸和阻塞两个阶段，由自适应准则确定。所提出方案的有效性通过仿真和实验得到验证。
关键词：串补电容、距离保护、电压相位比较、跳闸、阻塞、自适应准则