IEC 60633 pdf download – Terminology for high-voltage direct current (HVDC) transmission

IEC 60633 pdf download – Terminology for high-voltage direct current (HVDC) transmission
8.7.2
bipolar metallic return (HvDc) system
bipolar system in which the return current path between neutrals of the HVDC system isthrough a metallic circuit
8.8
monopolar (HvDC) system
HvDC system with only one pole
8.8.1
monopolar earth return (HvDc) system
monopolar system in which the return current path between neutrals of the HVDC substationsis through the earth
8.8.2
monopolar metallic return (HvDc) system
monopolar system in which the return current path between neutrals of the HVDC substationsis through a metallic circuit
8.9
HvDc substation
HvDc converter station
part of an HVDC system which consists of one or more converter units installed in a singlelocation together with buildings，reactors,filters，reactive power supply，control,monitoring,protective, measuring and auxiliary equipment (see figure 7y
NOTE An HVDC substation forming part of an HVDC transmission system may be referred to as an HVDctrans mission substation.
8.9.1
(HVDG) tapping substation
HvDC substation, mainly used for inversion, with a rating which is a small fraction of that of therectifier(sy in the system
8.10
(HvDc) substation bipole
that part of a bipolar HvDc system contained within a substation
8.11
(HvDc) substation pole
that part of an HvDC system pole which is contained within a substation (see figure 8)
8.12
HvDC transmission line
part of an HVDC transmission system consisting of a system of overhead lines and/or cables.The HVDC transmission lines are terminated in HVDC substations (see figure 8).
8.13
HvDc transmission line pole
part of an HVDC transmission line which belongs to the same HVDC system pole
8.14
earth electrode
array of conducting elements placed in the earth, or the sea,which provides a low resistancepath between a point in the d.c. circuit and the earth and is capable of carrying continuouscurrent for some extended period (see figure 7)
NOTE 1 An earth electrode may be located at a point some distance from the HVDC substation.NOTE 2 Where the electrode is placed in the sea it may be termed a sea electrode.
8.15
earth electrode line
insulated line between the HVDC substation d.c. neutral bus and the earth electrode (seefigure 7)
HvDc substation equipment
9.1
a.c. filter
filter on the a.c. side of a converter, designed to reduce the harmonic voltage at the a.c. busand harmonic current flowing into the associated a.c. system (see Figure 7)
9.2
d.c. (smoothing) reactor
reactor connected in series with a converter unit or converter units on the d.c. side for theprimary purpose of smoothing the direct current and reducing current transients (see figure 7)
9.3
d.c. reactor arrester
arrester connected between the terminals of a d.c.reactor (see figure 7)
9.4
d.c. filter
filter which，in conjunction with the d.c. reactor(s) and with the d.c. surge capacitor(s), if any,serves the primary function of reducing (current or voltage) ripple on the HVDC transmissionline and/or earth electrode line (see figure 7y
9.5
d.c.damping circuit
combination of circuit elements which serve to reduce voltage transients and/or changeresonance conditions on the d.c.line (see figure 7)
9.6
d.c.surge capacitor
capacitor array connected between the d.c. line and the substation earth (directly or indirectly)to serve the primary function of reducing the amplitude and steepness of lightning surgesapplied to the substation equipment (see figure 7y
9.7
d.c. bus arrester
arrester connected between the d.c. bus (at a point between the d.c. reactor and the d.c. linedisconnector) and the substation earth (see figure 7)
9.8
d.c. line arrester
arrester connected between an HVDC line (at an HVDC substation) and substation earth (seefigure 7)
9.9
HvDc substation earth
array of conducting elements which provides a low impedance path from the earthed parts ofthe equipment in the HVDC substation to earth and which is capable of carrying high surgecurrents of momentary duration (see figure 7)