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3BSE008508R1控制模塊
確定距離區(qū)域在可以確定距離的范圍之前區(qū)域、阻抗和線路段的相位角
期間必須知道故障。各種類型的典型設(shè)置沿線區(qū)域范圍如下：距離繼電器范圍的典型設(shè)置
計(jì)算二次線阻抗的分區(qū)（分級(jí)表）根據(jù)線的放坡表計(jì)算的主要值阻抗必須轉(zhuǎn)換為次級(jí)值。這些
通過應(yīng)用以下關(guān)系式獲得：一次正序線路阻抗阻抗分別獨(dú)立定義阻抗特性
在四個(gè)距離區(qū)域中（區(qū)域4用于通過以下參數(shù)（i=1至4）確定的超范圍區(qū)域：線路或電纜的電抗和電阻設(shè)置在
使用參數(shù)“R”和“X”的適當(dāng)單位（見圖3.5.31.4）。在1或2A的額定電流下，“RR”和“RRE”的設(shè)定范圍為-300至+300/ph
0.01的步進(jìn)（-30至+30/ph，對(duì)于額定電流為5A，步進(jìn)為0.001）。
無論其他參數(shù)的設(shè)置如何，當(dāng)“X”設(shè)置為零時(shí)，區(qū)域?qū)⒈唤?。在這種情況下，其他區(qū)域是
除最后一個(gè)之外，也被阻止。1區(qū)只能通過參數(shù)“塊Z1”或二進(jìn)制輸入禁用“ExtBlock Z1”。
對(duì)于負(fù)值，測量方向相反“X”、“R”、“RR”和“RRE”。提供參數(shù)“RRE”和“RR”，以允許
用于E/F回路和相間的故障電阻環(huán)該設(shè)置采用E/F電阻，包括電弧電阻和塔架基腳電阻
考慮線路電阻
由于裝置為/ph，故障電阻在根據(jù)故障類型確定阻抗平面。在哪里
已知故障電阻RF的值（見圖3.5.31.5），它必須輸入R/X圖，如下所示：E/F:R=RF/（1+k0）
相間故障：R=RF/2三相故障：R=RF/3。
因此，使用參數(shù)分別補(bǔ)償E/F和相間回路的故障電阻
“RRE”和“RR”。參數(shù)“RR”通常設(shè)置得較低
因?yàn)橄嚅g故障電阻通常非常低。由欠阻抗參數(shù)定義的負(fù)載區(qū)域
啟動(dòng)時(shí)考慮“RLoad”和“AngleLoad”
測量特性。因此，繼電器可以：僅當(dāng)測得的故障阻抗在低阻抗啟動(dòng)特性。
Determining the distance zones
Before it is possible to determine the reaches of the distance
zones, the impedances and phase-angles of the line sections
during faults must be known. Typical settings for the various
zone reaches along the line are given below:Typical settings for the reaches of distance relay
zones (grading table)Calculating the secondary line impedances
The primary values calculated from the grading table for the line
impedances have to be converted to secondary values. These
are obtained by applying the following relationship:primary positive-sequence line impedanceThe impedance characteristic is defined independently for each
of the four distance zones (Zone 4 is used alternatively for the
overreaching zone) by the following parameters (i = 1 to 4):The reactance and resistance of the line or cable are set in the
proper units using the parameters ‘R’ and ‘X’ (see Fig. 3.5.31.4).At a rated current of 1 or 2 A, the impedance parameters ‘X’, ‘R’,
‘RR’ and ‘RRE’ have setting ranges of -300 to +300 /ph in
steps of 0.01 (-30 to +30 /ph in steps of 0.001 for a rated current of 5 A).
A zone is disabled when ‘X’ is set to zero regardless of the settings of the other parameters. In this case, the other zones are
also blocked with the exception of the last one. Zone 1 can only
be disabled by the parameter ‘Block Z1’ or the binary input
‘ExtBlock Z1’.
The direction of measurement is reversed for negative values of
‘X’, ‘R’, ‘RR’ and ‘RRE’.Provision is made with parameters ‘RRE’ and ‘RR’ for allowing
for the fault resistance in an E/F loop and in a phase-to-phase
loop. The setting takes the E/F resistance comprising the resistance of the arc and the pylon footing resistance in relation to
the line resistance into account.Since the unit is /ph, the fault resistance appears differently in
the impedance plane according to the type of fault. Where the
value of the fault resistance RF is known in (see Fig. 3.5.31.5),
it has to be entered in the R/X diagram as follows:
E/F: R=RF/(1+k0)
phase-to-phase fault: R=RF/2
three-phase fault: R=RF/ 3 .
It is for this reason that fault resistance is compensated separately for E/F and phase-to-phase loops using the parameters
‘RRE’ and ‘RR’. The parameter ‘RR’ will generally be set lower
than ‘RRE’, because the phase-to-phase fault resistance is normally very low.The load area defined by the underimpedance parameters
‘RLoad’ and ‘AngleLoad’ is taken into account be starting and
measuring characteristics. It follows from this that the relay can
only trip, if the fault impedance measured lies within the
underimpedance starting characteristic.
