JPS6346654B2 - - Google Patents
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- Publication number
- JPS6346654B2 JPS6346654B2 JP5311683A JP5311683A JPS6346654B2 JP S6346654 B2 JPS6346654 B2 JP S6346654B2 JP 5311683 A JP5311683 A JP 5311683A JP 5311683 A JP5311683 A JP 5311683A JP S6346654 B2 JPS6346654 B2 JP S6346654B2
- Authority
- JP
- Japan
- Prior art keywords
- current
- transformer
- phase
- phase shift
- windings
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
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- Protection Of Transformers (AREA)
Description
【発明の詳細な説明】
この発明は、電力系統とサイリスタ負荷との間
に接続される移相変圧器の保護継電装置に関す
る。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a protective relay device for a phase shift transformer connected between a power system and a thyristor load.
従来、この種の装置として第１図に示すものが
あつた。移相変圧器１は、１次側に巻線wa，wb，
wcをスター接続した巻線２を有し、また２次側
に巻線wa1，wb1，wc1をスター接続し、更にこれ
らの巻線wa1，wb1，wc1に移相用の巻線wb2，
wc2，wa2を直列接続した巻線３を有する。巻線
２の中点O1をなす巻線wa，wb，wcの一端は接地
され、それらの他端は電力系統の線２ａ，２ｂ，
２ｃに接続されて電圧VA，VB，VCが印加され
る。巻線３の中点O2をなす巻線wa1，wb1，wC1の
一端は抵抗４を介して接地される。巻線wb2，
wc2，wa2の他端は線３ａ，３ｂ，３ｃを介して
図示なしのサイリスタ負荷に接続される。巻線
wa1，wb1，wc1は電圧VA′，VB′，VC′を発生し、
巻線wa2，wb2，wc2は−VA″，−VB″，VC″を発生
するので、これらを合成することにより、線３
ａ，３ｂ，３ｃに電圧VA，VB，VCから位相差θ
をもつた電圧Va，Vb，Vcが印加される。 Conventionally, there has been a device of this type as shown in FIG. The phase shift transformer 1 has windings w a , w b , on the primary side.
It has a winding 2 in which w c is star-connected, and windings w a1 , w b1 , w c1 are star-connected on the secondary side, and these windings w a1 , w b1 , w c1 are used for phase shifting. Winding w b2 ,
It has a winding 3 in which w c2 and w a2 are connected in series. One end of the windings w a , w b , w c forming the midpoint O 1 of the winding 2 is grounded, and their other ends are the lines 2 a , 2 b , and
2c to which voltages V A , V B , and V C are applied. One end of the windings w a1 , w b1 , w C1 forming the middle point O 2 of the winding 3 is grounded via a resistor 4 . Winding w b2 ,
The other ends of w c2 and w a2 are connected to a thyristor load (not shown) via lines 3a, 3b, and 3c. winding wire
w a1 , w b1 , w c1 generate voltages V A ′, V B ′, V C ′,
The windings w a2 , w b2 , w c2 generate −V A ″, −V B ″, V C ″, so by combining these, wire 3
Phase difference θ from voltage V A , V B , V C to a, 3 b, 3 c
Voltages V a , V b , and V c with the following values are applied.
線３ａ，３ｂ，３ｃの電流は、変流器５ａ，５
ｂ，５ｃを介して移相器６に導入され、位相差θ
に対応した補償を受けた後、電流信号６ａ，６
ｂ，６ｃとなつて保護継電器７に入力される。保
護継電器７は、線２ａ，２ｂ，２ｃの電流を変流
器８ａ，８ｂ，８ｃを介して導入し、電流信号６
ａ，６ｂ，６ｃと比較することにより、移相変圧
器１の異常を監視す通常の差動保護継電器であ
る。 The currents in lines 3a, 3b, 3c are passed through current transformers 5a, 5
b, 5c to the phase shifter 6, and the phase difference θ
After receiving compensation corresponding to the current signals 6a, 6
b, 6c and are input to the protective relay 7. The protective relay 7 introduces the current of the wires 2a, 2b, 2c through current transformers 8a, 8b, 8c, and generates a current signal 6.
This is a normal differential protection relay that monitors the phase shift transformer 1 for abnormalities by comparing it with a, 6b, and 6c.
ところで、移相変圧器として第２図及び第３図
に示すようなものもある。移相変圧器９は、１次
側に第１図のものと同一の巻線２を有する。しか
し、その２次側の巻線１０は第１図に示す巻線３
に加え、巻線wa1，wb1，wc1に巻線wc3，wa3，
wb3を直列接続する構成をもち、位相差−θをも
つ電圧−VC″，−VA″，−VB″を発生し、巻線wa1，
wb1，wc1の電圧VA′，VB′，VC′との合成により、
サイリスタ負荷に接続されている線１０ａ，１０
ｂ，１０ｃに電圧Va′，Vb′，Vc′を印加する。 By the way, there are also phase shift transformers as shown in FIGS. 2 and 3. The phase-shifting transformer 9 has on the primary side a winding 2 identical to that of FIG. However, the winding 10 on the secondary side is the winding 3 shown in FIG.
In addition to the windings w a1 , w b1 , w c1 , the windings w c3 , w a3 ,
The windings w a1 ,
By combining w b1 and w c1 with voltages V A ′, V B ′, and V C ′,
Wires 10a, 10 connected to the thyristor load
Voltages V a ′, V b ′, and V c ′ are applied to b and 10c.
第２図に示すように、位相差θ及び−θの電圧
を発生する多相型の移変圧器は、第１図に示すよ
うな３相入力の保護継電装置によつて保護が得ら
れないのは明らかである。 As shown in Figure 2, a polyphase transfer transformer that generates voltages with phase differences θ and -θ can be protected by a three-phase input protective relay device as shown in Figure 1. Obviously not.
この発明は、上記のような従来のものの欠点を
除去するためになされたもので、保護対象の移相
変圧器が多相型のものであつても簡単な構成で保
護することができる保護継電装置を提供すること
を目的とする。 This invention was made in order to eliminate the drawbacks of the conventional ones as described above, and provides a protection joint that can be protected with a simple configuration even if the phase shift transformer to be protected is a polyphase type. The purpose is to provide electrical equipment.
以下、この発明の一実施例を図について説明す
る。第４図において、移相変圧器９は第３図に示
す巻線構成を有する。１次側の線２ａ，２ｂ，２
ｃには変流器８ａ，８ｂ，８ｃが設けられ、２次
側の線３ａ，３ｂ，３ｃには変流器１１ａ，１１
ｂ，１１ｃが設けられ、２次側の線１０ａ，１０
ｂ，１０ｃには変流器１２ａ，１２ｂ，１２ｃが
設けられる。変流器は、線２ａ，２ｂ，２ｃを流
れる電流Ia，Ib，Icを変流すると共に、その２次
側が△接続されているので、それらを合成するこ
とにより、線２ab，２bc，２caに電流Ia−Ib，Ib
−Ic，Ic−Iaを導出する。変流器１１ａ，１１ｂ，
１１ｃも線３ａ，３ｂ，３ｃを流れる電流Iu1，
Iv1，Iw1を変流すると共に、その２次側が△接続
されているので、それらを合成することにより、
線３ab，３bc，３caに電流Iu1−Iv1＝Iuv1，Iv1−
Iw1＝Ivw1，Iw1−Iu1＝Iwu1を導出する。変流器１２
ａ，１２ｂ，１２ｃも線１０ａ，１０ｂ，１０ｃ
を流れる電流Iu2，Iv2，Iw2を変流すると共に、そ
の２次側が△接続されているので、それらを合成
することにより、線１０ab，１０bc，１０caに
電流Iu2−Iv2＝Iuv2，Iv2−Iw2＝Ivw2，Iw2−Iu2＝Iwu2
を導出する。 An embodiment of the present invention will be described below with reference to the drawings. In FIG. 4, phase shift transformer 9 has the winding configuration shown in FIG. Primary side wires 2a, 2b, 2
C is provided with current transformers 8a, 8b, 8c, and secondary side wires 3a, 3b, 3c are provided with current transformers 11a, 11
b, 11c are provided, and the secondary side wires 10a, 10
b, 10c are provided with current transformers 12a, 12b, 12c. The current transformer transforms the currents Ia, Ib, and Ic flowing through the wires 2a, 2b, and 2c, and their secondary sides are Δ-connected, so by combining them, the currents are transformed into the wires 2ab, 2bc, and 2ca. Current I a −I b , I b
−I c , I c −I a are derived. Current transformers 11a, 11b,
11c also has a current I u1 flowing through the lines 3a, 3b, and 3c,
While I v1 and I w1 are current-transformed, their secondary sides are connected △, so by combining them,
Currents I u1 − I v1 = I uv1 , I v1 − in wires 3ab, 3bc, and 3ca
Derive I w1 = I vw1 and I w1 − I u1 = I wu1 . Current transformer 12
a, 12b, 12c are also lines 10a, 10b, 10c
The currents I u2 , I v2 , I w2 flowing through the lines 10ab, 10bc, and 10ca are transformed by transforming the currents I u2 , I v2 , and I w2 , and their secondary sides are connected Δ, so by combining them, the currents I u2 −I v2 = I uv2 , I v2 −I w2 = I vw2 , I w2 −I u2 = I wu2
Derive.
第３図に示すように、巻線wa，wb，wcの巻数
を１、巻線wa1，wb1，wc1の巻数をｍ、巻線wa2，
wa3，wb2，wb3，wc2，wc3の巻数をＰとすると、
次式が成立する。 As shown in Fig. 3, the number of turns of the windings w a , w b , w c is 1, the number of turns of the windings w a1 , w b1 , w c1 is m, and the number of turns of the windings w a2 ,
If the number of turns of w a3 , w b2 , w b3 , w c2 , w c3 is P, then
The following formula holds true.
Ia＝ｍ（Iu1＋Iu2）−Ｐ（Iv2＋Iw1）
Ib＝ｍ（Iv1＋Iv2）−Ｐ（Iw2＋Iu1）
Ic＝ｍ（Iw1，Iw2）−Ｐ（Iu2＋Iv1） (1)
従つて、電流Ia−Ib，Ib−Ic，Ic−Iaは次式のよ
うに表わすことができる。I a = m (I u1 + I u2 ) - P (I v2 + I w1 ) I b = m (I v1 + I v2 ) - P (I w2 + I u1 ) I c = m (I w1 , I w2 ) - P ( I u2 + I v1 ) (1) Therefore, the currents I a −I b , I b −I c , and I c −I a can be expressed as in the following equations.
Ia−Ib＝ｍ（Iu1＋Iu2）−ｍ（Iv1＋Iv2）＋Ｐ（Iw
2＋Iu1−Iv2−Iw1）
Ia−Ib＝ｍ（Iu1＋Iu2）−ｍ（Iv1＋Iv2）＋Ｐ（Iw
2＋Iu1−Iv2−Iw1）
Ib−Ic＝ｍ（Iv1＋Iv2）−ｍ（Iw1＋Iw2）＋Ｐ（Iu2＋I
v1−Iw2−Iu1）
Ia−Ib＝ｍ（Iu1＋Iu2）−ｍ（Iv1＋Iv2）＋Ｐ（Iw
2＋Iu1−Iv2−Iw1）
Ib−Ic＝ｍ（Iv1＋Iv2）−ｍ（Iw1＋Iw2）＋Ｐ（Iu2＋I
v1−Iw2−Iu1）
Ic−Ia＝ｍ（Iw1＋Iw2）−ｍ（Iu1＋Iu2）＋Ｐ（Iv2，I
w1−Iu2−Iv1） (2)
(2)式を更に書き改めると、次式のようになる。 I a −I b = m (I u1 + I u2 ) − m (I v1 + I v2 ) + P (I w
2 +I u1 −I v2 −I w1 ) I a −I b =m(I u1 +I u2 )−m(I v1 +I v2 )+P(I w
2 +I u1 −I v2 −I w1 ) I b −I c =m(I v1 +I v2 )−m(I w1 +I w2 )+P(I u2 +I
v1 −I w2 −I u1 ) I a −I b =m(I u1 +I u2 )−m(I v1 +I v2 )+P(I w
2 +I u1 −I v2 −I w1 ) I b −I c =m(I v1 +I v2 )−m(I w1 +I w2 )+P(I u2 +I
v1 −I w2 −I u1 ) I c −I a = m(I w1 +I w2 )−m(I u1 +I u2 )+P(I v2 , I
w1 −I u2 −I v1 ) (2) If we further rewrite equation (2), we get the following equation.
Ia−Ib＝ｍ（Iu1＋Iu2）−ｍ（Iv1＋Iv2）＋Ｐ（Iw
2＋Iu1−Iv2−Iw1）
Ia−Ib＝ｍ（Iu1＋Iu2）−ｍ（Iv1＋Iv2）＋Ｐ（Iw
2＋Iu1−Iv2−Iw1）
＝ｍ（Iu1−Iv1）＋ｍ（Iu2−Iv2）−Ｐ（Iw1−Iu
1）−Ｐ（Iv2−Iw2）
＝mIuv1＋mIuv2−PIwu1−PIvw2
Ib−Ic＝ｍ（Iv1＋Iv2）−ｍ（Iw1＋Iw2）＋Ｐ（Iu
2＋Iv1−Iw2−Iu1）
Ib−Ic＝ｍ（Iv1＋Iv2）−ｍ（Iw1＋Iw2）＋Ｐ（Iu
2＋Iv1−Iw2−Iu1）
＝ｍ（Iv1−Iw1）＋ｍ（Iv2−Iw2）−Ｐ（Iu1−Iv
1）−Ｐ（Iw2−Iu2）
＝mIvw1＋mIvw2−PIuv1−PIwu2 (3)
Ic−Ia＝ｍ（Iw1＋Iw2）−ｍ（Iu1＋Iu2）＋Ｐ（Iv
2＋Iw1−Iu2−Iv1）
Ic−Ia＝ｍ（Iw1＋Iw2）−ｍ（Iu1＋Iu2）＋Ｐ（Iv
2＋Iw1−Iu2−Iv1）
＝ｍ（Iw1−Iu1）＋ｍ（Iw2−Iu2）−Ｐ（Iv1−Iw
1）−Ｐ（Iu2−Iv2）
＝mIwu1＋mIwu2−PIvw1−Puv2
第５図は、(3)式の左辺に示す電流Ia−Ibに対応
した(3)式右辺の電流を得るべく、Iuv1，Iuv2，
Iwu1，Ivw2を合成する変流器１８ａを示す。この
ようにして変流器１３ａにより合成された(3)式右
辺の電流は、１次側の電流Ia−Ibと比較されるべ
く、保護継電器７に入力される。同様に、電流Ib
−Ic，Ic−Iaに対応して変流器１３ｂ，１３ｃが
設けられ、(3)式右辺に示す合成出力の電流を得
る。保護継電装置７は、電流Ia−Ib，Ib−Ic，Ic−
Iaと、変流器１３ａ，１３ｂ，１３ｃの出力から
それぞれ合成した(3)式右辺の電流とを比較し、も
し異常が検出されたときは移相変圧器９を保護す
るための動作をする。 I a −I b = m (I u1 + I u2 ) − m (I v1 + I v2 ) + P (I w
2 +I u1 −I v2 −I w1 ) I a −I b =m(I u1 +I u2 )−m(I v1 +I v2 )+P(I w
2 +I u1 −I v2 −I w1 ) =m(I u1 −I v1 )+m(I u2 −I v2 )−P(I w1 −I u
1 ) −P(I v2 −I w2 ) =mI uv1 +mI uv2 −PI wu1 −PI vw2 I b −I c =m(I v1 +I v2 )−m(I w1 +I w2 )+P(I u
2 +I v1 −I w2 −I u1 ) I b −I c = m(I v1 +I v2 )−m(I w1 +I w2 )+P(I u
2 +I v1 −I w2 −I u1 ) =m(I v1 −I w1 )+m(I v2 −I w2 )−P(I u1 −I v
1 ) −P(I w2 −I u2 ) = mI vw1 +mI vw2 −PI uv1 −PI wu2 (3) I c −I a = m(I w1 +I w2 )−m(I u1 +I u2 )+P(I v
2 +I w1 −I u2 −I v1 ) I c −I a = m(I w1 +I w2 )−m(I u1 +I u2 )+P(I v
2 +I w1 −I u2 −I v1 ) =m(I w1 −I u1 )+m(I w2 −I u2 )−P(I v1 −I w
1 ) −P(I u2 −I v2 ) = mI wu1 + mI wu2 −PI vw1 −P uv2 Figure 5 shows the equation on the right side of equation (3) corresponding to the current I a −I b shown on the left side of equation (3). To obtain current, I uv1 , I uv2 ,
A current transformer 18a that combines I wu1 and I vw2 is shown. The current on the right side of equation (3) thus synthesized by the current transformer 13a is input to the protective relay 7 to be compared with the primary side current I a −I b . Similarly, the current I b
Current transformers 13b and 13c are provided corresponding to -I c and I c -I a to obtain a combined output current shown on the right side of equation (3). The protective relay device 7 has currents I a −I b , I b −I c , I c −
Compare I a with the current on the right side of equation (3), which is synthesized from the outputs of current transformers 13a, 13b, and 13c, and if an abnormality is detected, take action to protect phase shift transformer 9. do.
以上のように、この発明によれば、移相変圧器
が多相型のものであつても、その２次側の電流を
変流器を介して合成し、１次側の電流に対応した
３相電流を得ることができるので、移相変圧器を
保護するための構成を簡単にすることができる効
果がある。 As described above, according to the present invention, even if the phase shift transformer is a multi-phase type, the current on the secondary side is combined via the current transformer and the current on the primary side is combined. Since a three-phase current can be obtained, there is an effect that the configuration for protecting the phase shift transformer can be simplified.
第１図は従来の保護継電装置の接続図、第２図
及び第３図は移相変圧器の巻線構成を示す図、第
４図はこの発明の一実施例による保護継電装置の
接続図、第５図は第４図に示す変流器の巻線構成
を示す図である。
１，９……移相変圧器、５ａ，５ｂ，５ｃ，８
ａ，８ｂ，８ｃ，１１ａ，１１ｂ，１１ｃ，１２
ａ，１２ｂ，１２ｃ，１３ａ，１３ｂ，１３ｃ…
…変流器、７……保護継電器。なお、図中、同一
符号は同一部分を示す。
FIG. 1 is a connection diagram of a conventional protective relay device, FIGS. 2 and 3 are diagrams showing the winding configuration of a phase shift transformer, and FIG. 4 is a diagram of a protective relay device according to an embodiment of the present invention. The connection diagram, FIG. 5, is a diagram showing the winding configuration of the current transformer shown in FIG. 4. 1, 9...Phase shift transformer, 5a, 5b, 5c, 8
a, 8b, 8c, 11a, 11b, 11c, 12
a, 12b, 12c, 13a, 13b, 13c...
...Current transformer, 7...Protective relay. In addition, in the figures, the same reference numerals indicate the same parts.
Claims (1)
線により多相電流を合成する移相変圧器の保護継
電装置において、上記移相変圧器の１次側の各相
の電流を変流する複数の第１の変流器と、上記移
相変圧器の２次側の電流を所定比でそれぞれ変流
する複数の第２の変流器と、上記第１の変流器の
出力電流を合成して各相間の電流を導出する第１
の接続と、上記第２の変流器の出力電流を合成し
て上記２次側の各相間の電流を導出する第２の接
続と、上記第２の接続により導出された電流を合
成して上記第１の接続により導出された電流に対
応する電流を導出する第３の変流器と、上記第１
の接続により導出された電流と上記第３の変流器
の出力電流とを比較して上記移相変圧器を保護す
るための動作出力を発出する保護継電器とを備え
たことを特徴とする保護継電装置。1. In a protective relay device for a phase shift transformer that has a plurality of windings for phase shifting on the secondary side and synthesizes multiphase currents using the windings, each phase of the primary side of the phase shift transformer a plurality of first current transformers that transform the current of the phase shift transformer; a plurality of second current transformers that transform the secondary current of the phase shift transformer at a predetermined ratio; The first step is to combine the output currents of the current transformers and derive the current between each phase.
A second connection that combines the output current of the second current transformer to derive a current between each phase of the secondary side, and a current derived by the second connection. a third current transformer that derives a current corresponding to the current derived by the first connection;
and a protective relay that compares the current derived by the connection with the output current of the third current transformer and outputs an operating output for protecting the phase shift transformer. Relay device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5311683A JPS59178923A (en) | 1983-03-29 | 1983-03-29 | Protecting relaying device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5311683A JPS59178923A (en) | 1983-03-29 | 1983-03-29 | Protecting relaying device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS59178923A JPS59178923A (en) | 1984-10-11 |
| JPS6346654B2 true JPS6346654B2 (en) | 1988-09-16 |
Family
ID=12933826
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP5311683A Granted JPS59178923A (en) | 1983-03-29 | 1983-03-29 | Protecting relaying device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS59178923A (en) |
-
1983
- 1983-03-29 JP JP5311683A patent/JPS59178923A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS59178923A (en) | 1984-10-11 |
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