简介：IntroductionLightningcancausegreatdestruction.AccordingtotherecordinthenorthernChina,morethan150lightningstrokesoccuronapowersystemannually.Highvoltage(millionsofvolts)andlargecurrent(hundredsof-kA)associatedwithlightning,willdamagepropertyandevenkillpeopleandlivestocks.Itwillbeverydangerousifalightningstrokestrikesoildepotofpowerplantorsubstation.Inaddition,thehighvoltageinducedbytheelectrostaticchargegeneratedduetooilflowingwillprobablycausedamageunlesstheelectrificationhasbeenlimitedanddrainedoff.

简介：1.IntroductionConductorgallopinghascausedmoreandmoredisturbancestothesecureoperationofpowersystemfrom1930untilnow.Al-thoughmanyauthorshavebeenstudyingitstheoryandpreventivemeasuresbywind-tunnelandfieldmodellingtestsandgettingsome

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简介：InordertoeffectivelycontroltheacidrainandSO.pollutioninthe“twocontrols”regions,theStateEnviron-mentalProtectionAdministration(SEPA)willtakesixmajormeasurestostrengthenthesupervisionandmanagementtoreduceSO2emtissiontoamaximumlimit.

简介：Themaintechnologiesforreducingfluegasheatlossofpulverizedcoal-firedboilersareintroduced,andthesuitabilityofthesetechnologiesforboileroperationandtheprinciplesforselectionofthesetechnologiesareexplored.Themainconclusionsare:1)thenon-equilibriumcontroloverfluegasflowratesattheinletoftheairheaterandthereversalrotationoftheairheaterrotatorshouldbepopularizedasregulartechnologiesinlargeboilers;2)increasingtheareaoftheairheatertoreducethefluegasheatlossinpulverizedcoal-firedboilersshouldbethetopoptionandincreasingtheareaoftheeconomizerbethenextchoice;3)low-pressureeconomizertechnologycouldsaveenergyunderspecialconditionsandshouldbecomparedwiththetechnologyofincreasingeconomizerareaintermsoftechnicaleconomicswhenthelatterisfeasible;4)thehotprimaryairheaterisonlysuitabletothepulverizingsystemwithalargeamountofcoldairmixed.

简介：摘要：近年来，九号机组VB1型6kV真空断路器二次插头故障频发,对机组安全可靠运行有着极为不利的影响，为提高机组运行的稳定性，对二次插头故障原因进行分析并结合现场实际提出方案，对断路器二次插头进行升级改造。