DL∕T 5340-2006 英文版 直流输电线路对电信线路危险影响防护设计技术规定

1、 ICS 29.240.30F 21Record No. J5222006Electric Power Industry Standard of the Peoples Republic of China P DL / T 5340 2006 Technical Code for Designing ofTelecommunication Lines AgainstDanger Effects from DC PowerTransmission LinesDesign of Fossil Fuel Power PlantIssue Date: May 6, 2006ImpIementation

2、 Date: October 1, 2006Issued by the NationaI DeveIopment and Reform Commission of the PeopIes RepubIic of China Electric Power Industry Standard of the Peoples Republic of China P DL / T 5340 2006 Technical Code for Designing ofTelecommunication Lines AgainstDanger Effects from DC PowerTransmission

3、LinesTranslation sponsored by: China Electric Power Planning & Engineering AssociationTranslated by: SUNTHER Consulting Co., Ltd.Reviewed by: Central Southern China Electric Power Design InstituteCHINA ELECTRIC POWER PRESS BEIJING, 2013 DL / T 5340 2006Contents Foreword 123Scope 1Terms and Definitio

4、ns 2Fault Conditions of DC Transmission Lines and OperatingConditions of Telecommunication Line Circuits 6Permissible Value of Danger Effects 7Calculation of Danger Effects 11Protective Measures 17456Appendix A (Normative) Calculation of Mutual InductiveCoefficient of Infinite LongAdjacent Lines 19A

5、ppendix B (Normative) Calculation of the Inductance to Groundof the Conductors of DC TransmissionLines 23I DL / T 5340 2006Foreword This code is prepared in response to the arrangement made by theNotice on Issuing the Plan for Supplementing Electric PowerIndustry Standard 2003 Issued by the General

6、Office of NationalDevelopment and Reform Commission (FGBGY2003873).The large-scale construction of HVDC transmission lines andthe increasingly growing transmission voltages are bound to causeelectromagnetic interference to the adjacent telecommunication lines.Unfortunately, no material and literatur

7、e in China and foreigncountries has systematically presented the harmful effects caused byDC transmission lines to the adjacent telecommunication lines andthe relevant protection measures, the relevant influencing mechanismand the calculation methods in this respect. Additionally, no unifiedcalculat

8、ion and design standard is available in China. In light of this,it makes great sense to establish this code to support the engineeringdesign of DC transmission lines, address the actual problems of aproject, improve the design quality of communication protections,make the project construction cycle

9、less time consuming and reducethe investment costs of the project.Thiscodeplacesemphasisondescribingtheuniquecharacteristics of the design of DC transmission lines that may causeadverse effects to the adjacent telecommunication lines. Since thedesign of DC transmission lines has much in common with

10、that of ACtransmission lines, DL/T 5033 2006 The Design Rules ofTelecommunication Lines Against Danger and Interference EffectsFrom Power Transmission Lines may be taken as a reference.II DL / T 5340 2006Appendices A and B to this code are normative.This code is proposed by China Electricity Council

11、.This code is solely managed and interpreted by TechnicalCommittee on Electric Power Planning and Engineering of StandardizationAdministration of Power Industry.This code is mainly drafted by Central Southern China ElectricPower Design Institute.The organizations participating in drafting this code

12、includeChina Power Engineering Consulting Group Corporation, NortheastChina Electric Power Design Institute, East China Electric PowerDesign Institute, Southwest Electric Power Design Institute, andGuangdong Electric Power Design and Research Institute.The leading authors of this code include Xiong

13、Wanzhou, WangWeihua, Zeng Liansheng, Xie Xing, Miao Guiliang, Zhao Shixiong,Yu Wenzhi, Han Yanming, Wei Dejun, and Meng Xianbin.This code is translated by SUNTHER Translation & Solutionsunder the authority of China Electric Power Planning & EngineeringAssociation.III DL / T 5340 20061 Scope This cod

14、e specifies the permissible value of danger effects ontelecommunication lines from DC transmission lines, presents thecalculation methods of danger effects, and provides necessaryparameters and protective measures.This code applies to the design of the protections that protecttelecommunication lines

15、 from danger effects caused by the adjacentDC transmission lines.In addition to this code, the design of the protections that protecttelecommunication lines from danger effects caused by the adjacentDC transmission lines shall comply with the provisions of thenational standards currently in force as

16、 well.1 DL / T 5340 20062 Terms and DefinitionsThe following terms and definitions apply to this code.2.0.1Telecommunication linesCommunication lines in forms of overhead open wire, overheador buried cable, overhead or buried telecommunication optical fibercable, and railway signal electrical line,

17、cable television (signal, feedand subscriber) line, and remote control and signaling line.2.0.2Railway signal electrical linesCables and overhead open wires that transmit information forrailway signal system, such as relay semi-automatic or automaticobturate way circuit, remote control line, remote

18、signaling line, andrailway circuit within the automatic obturate section.2.0.3Danger effectsThe induced voltage and current on telecommunication linescaused by DC transmission lines can possibly endanger the safety oftelecommunication operation and maintenance personnel, damagetelecommunication line

19、s or equipment, cause fire to buildings andstructures, or cause wrong operation of railway signaling equipmentwhich will bring hazards to traffic safety.2.0.4AdjacencyThe relative position of telecommunication lines to DCtransmissionlines when the electromagnetic effects of DC2 DL / T 5340 2006trans

20、mission lines may cause danger to the telecommunication lines.Parallel adjacency describes a situation in which the variation ofdistance between two adjacent lines does not exceed 5% of thearithmetic mean of the distance. Oblique adjacency describes asituation in which the variation of distance betw

21、een two adjacentlines exceeds 5% and increases or decreases linearly (both DCtransmission lines and telecommunication lines having no turningpoints).2.0.5Adjacent distanceThe distance obtained by perpendicularly drawing a line fromany point on the center line of the telecommunication line to that of

22、the DC transmission line.2.0.6Length of adjacent sectTheprojectedlengthoftheadjacentsectionofthetelecommunication lines on the DC transmission lines.2.0.7Cross-overThe situation in which DC transmission lines pass throughtelecommunication lines from overhead.2.0.8Inductive coupling effectEffects of

23、current in DC transmission lines or from the groundon telecommunication lines through inductive coupling.2.0.9Capacitive coupling effectEffects of voltage of DC transmission lines on telecommunicationlines through capacitive coupling.3 DL / T 5340 20062.0.10Resistive coupling effectEffects on the gr

24、ounding systems and the burial cables oftelecommunication offices (stations) caused by ground resistivecoupling when the short-circuit current flowing through thegrounding system of DC power transmission line towers results in apotential difference between the direct grounding area and the remotegro

25、und area.2.0.11Magnetic induction endlong electromotancePotentialdifferencebetweenanytwopointsonatelecommunication line caused by the current in DC transmission lineand the ground.2.0.12Magnetic induction ground voltageThegroundpotentialinducedatanypointonatelecommunication line by the current in th

26、e DC transmission lineand the ground.2.0.13Railway circuitA circuit in which the tracks of railway are used as conductors tocheck if there are trains on the railway, transmit the information aboutthe presence of trains and form a communication circuit between theground and the train.2.0.14Automatic

27、obturate way circuitA circuit used to determine the traveling directions of trainswhen they are traveling bi-directionally on the same railway withinthe automatic obturate section (normally in the same route of the4 DL / T 5340 2006communication lines of railways).2.0.15Broadcasting signal linesSign

28、al transmission lines of the wired broadcasting signaltransmission system.2.0.16Broadcasting feedback linesFeedback transmission lines of the wired broadcasting powertransmission system.2.0.17Broadcasting users linesThe transmission lines correspond the output end of transformersto the input end of

29、users equipment used in the wired broadcastingpower transmission system.5 DL / T 5340 20063 Fault Conditions of DC TransmissionLines and Operating Conditions ofTelecommunication Line Circuits3.0.1 The fault conditions of a DC transmission line that may havedanger effects on the adjacent telecommunic

30、ation lines shall includethe following situations:1Grounding short-circuit of the pole conductors of mono-polar operated DC transmission lines;Grounding short-circuit of conductors of one pole of bipolaroperated DC transmission lines.3.0.2adjacent2Whencalculatingthedangereffectsontelecommunication l

31、ines caused by DC transmission lines, thefollowing modes should be selected according to the operatingconditions of the telecommunication lines.1The telecommunication lines have one end grounded throughlow impedance and the other end grounded through high impedance(open circuit).2The telecommunicati

32、on lines have both ends groundedthrough low impedance.3The telecommunication lines have both ends groundedthrough high impedance (open circuit).6 DL / T 5340 20064 Permissible Value of Danger Effects4.0.1 In the event of grounding short-circuit fault of the poleconductors of DC transmission lines, t

33、he endlong electromotance orthe ground voltage induced on the telecommunication lines of theoverhead open wires shall not exceed 3000 V (peak value).4.0.2In the event of grounding short-circuit fault of DCtransmission lines, the permissible value of endlong electromotanceor the ground voltage induce

34、d on the core wires of thetelecommunication cable lines shall comply with the followingrequirements.1Where isolation transformers or lightning protectors areprovided at both ends of the core wires of the telecommunicationcable lines:1) For telecommunication cable lines free of long-distancepower sup

35、plyUs0.85UDtUs1.2UAt(4.0.2-1)(4.0.2-2)2) For telecommunication cable lines with long-distancepower supply in conductor-to-earth modeUs0.85UDt-UrsUs1.2UAt-Urs(4.0.2-3)(4.0.2-4)3) For telecommunication cable lines with long-distancepower supply in conductor-to-conductor mode andgrounded at the center

36、pointUs0.85UDt- U2rs(4.0.2-5)7 DL / T 5340 2006Us1.2UAt- U2rs(4.0.2-6)Where:UDtDC test voltage of cable core and grounding sheath, V;UAtAC test voltage (effective value) of cable core andgrounding sheath, V;Urs long-distance power supply voltage of the sections forwhich the effects are calculated;Us

37、 induced voltage (peak value) of the cable core in the eventof faults of DC transmission lines, V.2When the conditions in clause 1 of 4.0.2 are not satisfied, thevalues specified in 4.0.1 shall be used; in this case, the insulationelectric strength of the telecommunication lines and equipment atboth

38、 ends of them as well as the over-current capability of theprotection unit shall be considered.4.0.3 In the event of grounding short-circuit fault of the poleconductor of DC transmission line, the magnetic induction voltages(including magnetic inductive endlong electromotance and magneticinductive g

39、round voltage) generated on the telecommunication opticalfiber cables shall meet the following provisions:1For telecommunication optical fiber cable lines which havemetal wire pairs and are free of long-distance power supply:Us0.85UDt(4.0.3-1)2For telecommunication optical fiber cable lines which ha

40、vemetal wire pairs and long-distance power supply:1) Telecommunication fiber cable lines withopticallong-distance power supply in conductor-to-earthmode:Us0.85UDt-Urs(4.0.3-2)8 DL / T 5340 20062) Telecommunicationoptical fiber cable lines withlong-distance power supply in conductor-to-conductormode

41、and grounded at the center point:Us0.85UDt- U2rs(4.0.3-3)3Telecommunication optical fiber cable lines with metalmembers but free of metal wire pairs:Us0.85UDt(4.0.3-4)Where:UDtDC test voltage of outer insulating sheath of optical fibercables, V;Urs long-distance power supply voltage of the sections

42、forwhich the effects are calculated, V;Us induced voltage (peak value) of the metal members of theoptical fiber cables in the event of faults of DCtransmission lines, V.4Danger effects may not be considered for optical fiber cablesfree of metal members and wire pairs.4.0.4 When grounding short-circu

43、it fault occurs at one poleconductor of the DC transmission line, the permissible value ofpotential difference between the adjacent buried telecommunicationcable cores, the metal wire pairs of the telecommunication opticalfiber cable, the metal members and the ground, and the permissiblevalueof pote

44、ntial rise on grounding devices disposed attelecommunication office (station) shall comply with the provisionsof 4.0.2 and 4.0.3.4.0.5 Where inductive coupling effect and resistive coupling effectare simultaneously caused by DC transmission lines to undergroundtelecommunication cables or telecommuni

45、cation optical fiber cables,9 DL / T 5340 2006the resultant value shall comply with the provisions of 4.0.2 and4.0.3.4.0.6 If the composite effects of magnetic induction endlongelectromotance and the ground potential rise exceeds the permissiblevalue, the ground voltage of the telecommunication line

46、 conductorsmust be further calculated according to the operating conditions ofthe telecommunication circuit described in 3.0.2.10 DL / T 5340 20065 Calculation of Danger Effects5.1 Provisions of Calculation5.1.1 When grounding short-circuit fault occurs at DC transmissionlines, the magnetic danger e

47、ffects on the telecommunication linescaused by the fault current originating from the rectifier station sideshall be considered; when checking the ground voltage of thetelecommunication lines, the magnetic danger effects on thetelecommunication lines caused by the fault current originating fromthe i

48、nverter station side may be considered.5.1.2The effects caused by DC transmission lines to theundergroundtelecommunicationcablelinesandthetelecommunication optical fiber cable lines shall include resistivecoupling effect which shall be calculated based on the short-circuitcurrent flowing through the

49、 tower grounding device when one poleconductor of the DC transmission lines experiences groundingshort-circuit faults.5.1.3 Where DC transmission lines cause both inductive andresistive coupling effects to buried telecommunication cable lines andoptical fiber cable lines, the resultant effect shall

50、be calculated as thesquare root of the sum of squares of both effect values.5.1.4 For design of telecommunication lines with dischargers forprotection at locations such as repeaters, junction cabinets andjunction boxes, the ground voltage of telecommunication lines shallbe considered when the discha

51、rgers operate.5.1.5 For DC transmission lines with ground wires, the magnetic11 DL / T 5340 2006danger effects may be considered according to the return currenteffect in ground wires.5.2 Calculation of Magnetic Danger Effects5.2.1When one pole conductor of DC transmission linesexperiences grounding

52、short-circuit fault, the endlong electromotanceinduced by the short-circuit current on telecommunication linesthrough inductive coupling shall be calculated using Formula 5.2.1.nE= M iliIsst(5.2.1)i=1Where:Emagneticinductionendlongelectromotanceontelecommunication lines, V; apparent angular frequenc

53、y affecting the current, rad/s, =2f, f=30 Hz;Mimutual induction coefficient of the ith adjacent sectionbetweentheDCtransmissionlineandthetelecommunication line at 30 Hz, H/km;li length of the ith adjacent section between the DCtransmission line and the telecommunication line, km;ls sum of weighted v

54、alues of the short-circuit currentcomponents at individual frequencies when one poleconductor of the DC transmission lines is grounded atdifferent points, A;s shielding coefficient of the outer sheath or ground wire at30 Hz within the adjacent section;t shielding coefficient of the overhead ground w

55、ire of theDC transmission lines at 30 Hz within the adjacent section.5.2.2 Where it is difficult to calculate the endlong electromotance12 DL / T 5340 2006using Formula 5.2.1, the simplified Formula 5.2.2-1 and 5.2.2-2should be used.1The magnetic induction endlong electromotance (peak value)caused b

56、y the fault current originating from the rectifier station sidewhen one pole conductor of the DC transmission lines is grounded:n|kfli1nE=Ud+i=0Ldl |Milist(5.2.2-1)nL + liLi=1|di=02The magnetic induction endlong electromotance (peak value)caused by the fault current originating from the inverter sta

57、tion sidewhen one pole conductor of the DC transmission lines is grounded:nUl -li|dnE= kfi=0M ilist(5.2.2-2)Ldli=1Where:Udoperating voltage of DC transmission lines, kV;Ld inductance of smoothing reactor, H;L inductance of the single pole conductor of DC transmissionlines with respect to the ground,

58、 H/km;kf structural coefficient of DC transmission lines (a ratiofactor between the discharging current strength of linecapacitance and the current strength in the event of fault ofpower source at the rectifier station side), it is directlyrelated to the electric charge stored by the conductors andg

59、enerally taken to be 0.2-0.3 for 1,000 km longtransmission line and 0.25 when the information of linelength is unavailable;13 DL / T 5340 2006l the total length of DC transmission lines, km.The meanings of other symbols in this formula are the same asthose in Formula 5.2.1.5.2.3 Where an unattended

60、repeater station is provided withprotective filters, the suppression attenuation contributed by theseprotective filters to magnetic induction effects shall be considered foraccumulating the magnetic induction endlong electromotance inadjacent telecommunication cable lines in the unattended repeaters