SU736007A1 - Device for measuring electromagnetic wave in power transmission line - Google Patents

Description

one

The invention relates to the field of relay protection of a power line ii can be used on an alternating current line of 500 to 1150 kV.

Devices for measuring currents and voltages are known, in which the measurement of the difference in electrical quantities arising in the emergency operating modes of the z ohmos o6i) ecta barrier is carried out with a nominal filter of the currents and voltages of various sequences and windings of the current and voltage relays. The inequalities of these devices are inaccurate operation during the transient process n (x: .c. Short circuit due to interruption of instrument transformers at large multiples of short circuit currents, as well as a considerable time of protection operation due to the signal delay in filters 1.

The closest to the technical essence and the achieved result to the proposed is a device in which an electromagnetic wave 2 is measured, containing current transformers, the secondary windings of which are connected according to the star to the series-connected active-inductive resistance; voltage transducers, the secondary windings of which are connected to the star circuit: - to the block of active-capacitive counter-capacitors. e11II, the middle point of which is isolated.

5 However, this device cannot be used.

for the detection, composition, h yu11i and nKy: pmo11 and reverse electric magneti1,1x in the line in the line of electro-transmission.

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10 1 OCSN1 I AM CONSTRUCTED BY ANYTHING AND REVERSED 11. OW

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It is achieved that in electrical equipment izbori electro 1ag: 1bit wave in electric transmission: four intermediate transformers are introduced, one of KOTcipiiix three-phase with primary windings connected but with a star

akin to the point and T1.1KUCHENNY to NSKHMODOvatelno soodiiy1nogo aktivnyi kobyv-iznutivnyi kontavlivleni to one | -: n single-phase) intermediate trans (} k); secondary winding KOTcipoio. with a similarly ground, 1 point, one output; 1 (1M connected to serially connected secondary windings of a three-phase transformer, and the second to the third winding of the same transformer. 11v other intermediate T: iai c4urmator 10 primary windings; respectively 1: one; 1; to the two phases () of the active-capacitive latency and to the active resistance, the third phase and the midpoint is 1 × b, the current, r their secondary windings are connected sequentially and connected between the ground on one VELHO clamp. The two other output terminals are the outputs of the secondary windings of a three-phase intermediate transformer. In the drawing, the schematic diagram is nt.tl; device. The device contains transformers 1 and 2 of current and voltage e-correspondence: o, block 3 ac1t-shno-inductive co-motivations, block 4 active-capacitance transformers, interconnecting transformers 5 and 6 in foams of current and intermediate transformers 7 and 8 in chains tension The device is an output of an iromez1 - :) power transformer in a current circuit and a power supply. The device works as follows; From the current transformer 1, the KOTOpoio secondary windings are connected to a star, currents and a lia block 3 of active-inductive resistance of currents, representing the 1st star cc.i connected to the star are consecutive and active and resistive. Ilriu this Obgz point “stars of these coiirjOTMP, lenii is connected with the hearth area“ stars of the secondary windings of current transformers. At the output of block 3, 1 arr is formed. iporodionatsii.1nye i module and izorez food source currents for 1 .tiiii and wave co-filing of the line. On the active 1H) 1x co-activity of those of the phases B and C, the active ind K1-i1 n1x co1: p; proportional to the difference in current E1ch-1x (Laz. 11current in phase with its interphase current and different phases; corresponding between the phase voltage of the output of the block of loads on the. ,, oi ;;) and inductors. Phase windings of 2 voltages, the secondary windings of which are connected into a star, arrive at block 4 of active-capacitive reactors, which are connected)) in stars with an isolated mid-point noc.ic capacitive and active Eppotizleniya. On active sun-contractions of the former 4, voltages are generated, which are nponopui-io but not the modulus of the difference of the phase voltage and the voltage of zero 11c. Continuity. From the output of the intermediate transformer 5, I have a secondary winding with a grounded midpoint n which serves to double the input voltage with a change (one times from; 1 h to 180, interphase, iiporiopuHOi-ia / ibnbie between iHOMv-g () k (c Km nostuna) id 110y: -k: onnoio (|) ormator (al on: i; k1z ;; 1.m () .irp with two: 1; m; regi11M / kg :) of the transformer. KOyrye. in CI.10K ) Ochsre.ch, Hpo-iopiiHOHa.ibiihi raziocTH current i: :) a3iii .Ln Goka} i; ieBoii nos.1nedo15a iT.ibHOLTH and SLAVED but;) aze relative 1K) friend ..Pga on | 8P--. ul-o ensured the connection of 1KM of the non-windings of an intermediary 1K) go t)) ((h) | (mat () p ;: (in “: - ;: i-zd with isolatoryOBaiKioii cf (l.T1K; point; ;.} ia 1 p 1 h1 1 11; affairs 1 c; e1.c on; -intensive sleep) from 1e11n x b.jzha 4 active capacitance; 1b x sonro n15.11M1NY, but on the course of precise trac1cch |:) form: h1ra 8 ii p, create ;;:, on the KOTopoio oiio vm. with the world of NPCI / s.m.IS output ;;; ii ;; gformatto) i Ipii this one ) onor1noHa .ibHo)) l; 1 1a: 1r female to H - (. shasuyuy.; pnpi. Direct H:; b | 1; tchai egektrol agnitn1 1e B). L; S v, z. d ;. i; ioTCj- On 3: ho. i ijix. 1:) a 43ii) Oin: aT (() O} i о m. I rel.la1 asmoe set1: oystn () nosvo.pg-s with;: o: vi (iHi, 4) ocuui and ada / kn ( ) th CXCMI I and: pc: h:; h; 1ect | 1 (TiixK) so. coiTOHiuvK) Si, cocv; iii: ui OiHHX i: K: for for ur ur. so,;.; 5-: obg gnoy t.skt | 1 (ga1nitn (; y zamn.ch; ra 1hch1) {} 1) current currents, normally; b ij - kn which {th / c- osdinen: cho scheme "zzez .; k 4c.ic ..) bH (1 1: wasps ;;, innocent aktyuchk; chch KTSIBHUM (o1-g: speak m, rpaHi; fo:) l; am:) G1: 1; nach1: nouns (that;) 1-1h; | s of the co / oyh windings; :) Hco; .u; i; cHbi according to the “star to G) LO | -; hC-LCH: -; .- with 1 CALCUL D X SOP1-CLCH1 BOOKLINE, ICCh K h: ;;) h1X from „1Irosi1: a. ogli; J .rl) l.ilic ic: 4. what, with uC.ibM; }; asp1I) en; 1 (; hh K: h; about 1;:. X 1 and the possibility of h: oe: av.1I1Och1 g X: ry my and obrpuy: 1 .:; mchtr () ma rHHTHiiix I) / 1i, (; but equipped with four pairs |) ohm / cutoch1ch gmn transformers one of the cohort three (laz1; h with 1: primary windings. Soi..tiie1ng; mi according to the “star with nzno.nirovannaya medium.tney point and zero .yuche1pch,: mn k n () trace (. C () ak-1H; H () - yn;. |, uktnvn1; m dream chzt division, ol.nofaz} g:) 1y nrol; daily 11y tra}) sformator. the winding is kotoro 11olk; 1uchepa to active active-inductive eotivo11 i, and secondary winding-transformer (; pa middle ground, single point output 11dk; nn1e11; i-; d; uU1 are overlapping. (1ince 5 | m) then); 1 tn windings of t C-hfa sitoio trans. and ch.RUGNl1

to the third winding of the same transformer, two other intermediate transformers by the primary windings, respectively, are connected to the two phases of the active-resistance unit and to the third-phase resistance and the midpoint of this unit, and their secondary windings are connected in series and connected between the ground and one output terminal, the other two the output terminals are the outputs of the secondary windings of a three-phase intermediate transformer.

Sources of information taken into account in the examination. Guidelines for relay protection. M.-L., “Energy. 1961 -1975, vol. 1-10.

2. Adjustment and operation of the relay part of the protection lines 400-500 kV, LEF402.

Claims (1)

Claim A device for measuring electromagnetic waves in a power line, containing current transformers, the secondary windings of which are connected according to the star circuit to series-connected active-inductive resistances, voltage transformers, the secondary windings of which are connected according to the star circuit to the block of active-capacitive resistance, average point of which is isolated, characterized in that, with the aim of extending the functionality by measuring the components of direct and reverse electromagnetic waves, it four intermediate transformers, one of which is three-phase with primary windings connected according to the “star” scheme with an isolated middle point and connected to series-connected active-inductive resistance, one single-phase intermediate transformer whose primary winding is connected to the active part of active-inductive resistance, and The secondary winding of the transformer is connected to two serially connected secondary windings of a three-phase one with a medium grounded point transformer, and the other - 736007 five to the third winding of the same transformer, two other intermediate transformers by the primary windings, respectively, are connected to two phases of the active resistance unit and to the third-phase active resistance and the midpoint of this unit, and their secondary windings are connected in series and connected between the ground and one output terminal, the other two output clamps serve you the secondary windings of the three-phase intermediate transformer.