微电网电流保护问题及其改进策略研究

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1、第44卷第504期电测与仪表Vol.44No.5042007年第12期ElectricalMeasurement&InstrumentationDec.2007微电网电流保护问题及其改进策略研究王冠英1，高春英1，吉春宇2，崔倩3（1.东北电力设计院，长春130000；2.长春工业大学，长春130000；3.大唐向阳风电有限公司，长春130000）摘要：随着传统大电网脆弱性日益暴露，致使全球化电力市场改革进程加快，在此背景下提出了分布式发电技术这个概念。而分布式发电技术会改变配电网的辐射状态和其单向传输电能状态，会降低大电网的可靠性和安全性。随后，微电网的概念孕育而生，微电网能够克服分

2、布式发电技术的缺点，使分布式发电技术得到大规模的运用。本文通过对微电网及其结构的介绍，根据微电网短路容量小的特点，提出一种快速动作的保护方案，在PSCAD/EMTDC软件中搭建微电网模型，并配置电流保护和无通道保护相结合的保护方案，通过仿真分析验证了该保护配置的有效性。关键词：微型电网；过电流保护；无通道保护中图分类号：TM933文献标识码：B文章编号：1001-1390（2014）00-0000-00MicroCurrentProtectionProblemsoftheMicro-gridElectricNetworkProblemsandImprovementStrategiesW

3、ANGGuan-ying1,GAOChun-ying1JIChun-yu2CUIQian3(1.NortheastElectricPowerDesignInstitute,Changchun130000,China.2.ChangcChununiversityUniversityoftechnologyTechnology,Changchun130000,China.3.DatangXiangyangWindPowerGenerationCo.Ltd.,Changchun130000,China)Abstract：Thevulnerabilityofthetraditionalpowe

4、rgridhasbeenstormingdrainbecomeincreasinglyobviousincreasingly,sothattheprocessoftheglobalelectricitymarketreformisspeedingup.Inthiscontext,theconceptoftherenewableenergybaseddistributedpowergenerationtechnologiestechnologyhasbeenproposed.Thistechnologycanchangetheradiationstateradiationofthedis

5、tributionnetworkanditsone-waytransmissionstateofelectricalenergy,state.Anditwhichwillreducethesecurityandreliabilityofthepowersystemgrid.Later,theconceptMmicro-gridcomesintobeing,whichovercomesthedisadvantagesoftheasadistributedpowergenerationtechnologyandenablesittobeusedonalargescale.Inthispap

6、er,micro-gridanditsstructurewereintroducedandaprotectionschemewithfastactionwasproposedbasedonthecharacteristicofthemicro-gridthatitsshort-circuitcapacitywassmall.canplayaverygoodpotentialformsoforganizationhasbeenproposed,sothattheherenewableenergybaseddistributedgenerationtechnologycanbelarges

7、caleapplication.Basedonthemicropowergridanditsstructureisintroduced,accordingtothecharacteristicsofmicrogridshort-circuitcapacityissmall,aprotectionschemeforthefastaction,buildtheAmicro-gridmodelwasbuiltinthePSCAD/EMTDCsoftw