高压直流测量装置检修导则 DLT 353-2019e.pdf

DL/T353-2019ForewordDL/TC 12 is in charge of this English translation.In case of any doubt about the contents of English translation,the Chinese original shall be considered authoritative.This standard is drafted in accordance with the rulesgiven in the GB/T 1.1-2009 Directives for standardization-Part 1:Stucture and drafting of standards.This standard is a revision to DL/T 353-2010 Guide for HVDC measuring equipment maintenance.Themain technical contents of the revision are as follows:In the Routine maintenance of HVDC divider,the maintenance items such as SF6 gas purity,moisturecontent,decomposition content were added(see 6.3.1 Routine maintenance of HVDC divider);-In the Routine maintenance of photoelectric direct-current measuring equipment,the maintenance itemssuch as hydrophobic inspection have been added(see 6.3.2)In the Routine maintenance of zero-flux direct-current transformer,the maintenance items such as theinspection of secondary circuit insulation resistance were added(see 6.3.3)-In the Special overhauling project of HVDC divider,the maintenance items such as the replacement ofsecondary divider were added(see 6.4.1);In the Special overhauling of photoelectric direct-curret measuring equipment,the maintenance itemssuch as Optical fiber or connector fault handlingwere dded(see 6.4.2)This standard was proposed by the China Electricity Col.This standard was prepared by the Technical Conmittee for Standardization of HVDC TransmissionTechnology in the Power Industry(DL/TC 12).This standard replaces DL/T 353-2010,whuch was issued on January 9,2011,as the first edition.This is thefirst revised edition.Please send any opinions or suggestions put forward during the execution of this standard to the StandardizationManagement Center of China Electricity Council(No.1,Lane 2,Baiguang Road,Beijing,100761).Translation unit of English version of this standard:State Grid International Development Co.,LtdMain translators and editors of this standard:Sun Xiaolong,Guo Xuejian.力DL/T353-20193.5remote modulea module that converts the output signal of a primary current or voltage sensor into digital signals andcompletes the electro-optical conversion3.6polarization maintaining fibera special single-mode optical fiber that can maintain the polarization state of the transmitted light in the opticalfiber3.7acquisition unitequipment that can provide the qualified polarized light signal for the sensing fiber,calculate the primarycurrent value by receiving and analyzing the optical signal sent by the sensing fiber,and output it according tothe prescribed profocol for the merging unit or other secondary equipment to useNote:The sensing fiber is a special single-mode fiber used to sense the measured current information and maintain thepolarization state of the transmitted light in the fiber.3.8general maintenancemaintenance that can be done without a power cut3.9routine maintenancemaintenance that needs to be conducted regularly with a v:wer cut3.10special overhaulingmajor critical defects and accident handling,euipment replacement,and disintegration overhauling4 General requirement4.1 In this standard,the maintenance consists of three types:general maintenance,routine maintenance andspecial overhauling.General maintenance and routine maintenance are carried out periodically4.2 If the equipment technical documents are completed with the maintenance manual and specific maintenanceprocess requirements,they shall be strictly followed during maintenance.For the maintenance items required by theequipment technical documents but not covered by this standard,the guidance and requirements provided by theequipment technical documents shall be followed.If the requirements of the equipment technical documents areinconsistent with the requirements of this standard,the stricter requirements shall prevail.4.3 While adjusting the maintenance cycles or items according to factors such as the status of the equipment and thegeographical environment,the equipment operation and maintenance unit shall handle relevant approval procedures.4.4 The maintenance records shall be made,and relevant materials shall be sorted and filed aftermaintenance.4.5 The maintenance of on-site backup equipment can be carried out with reference to this standard5 Pre-maintenance preparation5.1 Document preparationConsult files prior to maintenance to know of the working principle,structural characteristics,performance2