JPS6361846B2 - - Google Patents
Info
- Publication number
- JPS6361846B2 JPS6361846B2 JP56041397A JP4139781A JPS6361846B2 JP S6361846 B2 JPS6361846 B2 JP S6361846B2 JP 56041397 A JP56041397 A JP 56041397A JP 4139781 A JP4139781 A JP 4139781A JP S6361846 B2 JPS6361846 B2 JP S6361846B2
- Authority
- JP
- Japan
- Prior art keywords
- transmission line
- power transmission
- calculates
- current
- relay device
- 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
Links
- 230000005540 biological transmission Effects 0.000 claims description 25
- 230000001681 protective effect Effects 0.000 claims description 10
- 238000010586 diagram Methods 0.000 description 6
- 230000001934 delay Effects 0.000 description 2
Landscapes
- Emergency Protection Circuit Devices (AREA)
- Locating Faults (AREA)
Description
【発明の詳細な説明】
この発明は、直流送電を行う送電線の保護継電
装置に関する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a protective relay device for a power transmission line that transmits DC power.
従来、この種の装置として第１図に示すものが
あつた。１−１は送電端に設けられたサイリス
タ・バルブ、１−２は受電端に設けられたサイリ
スタ・バルブ、２−１は送電端に設けられた直流
リアクトル、２−２は受電端に設けられた直流リ
アクトル、３は直流リアクトル２−１を介してサ
イリスタ・バルブ１−１に接続され、直流リアク
トル２−２を介してサイリスタ・バルブ１−２に
接続され、直流送電を行う送電線、４−１，４−
２はそれぞれ送電線３の送電端及び受電端でその
電流を検出する変流器、５は送受信器を含み、変
流器４−１の出力を伝送する伝送装置、６は伝送
装置５及び変流器４−２の各出力を図示の極性で
加算する加算器、７は加算器６の出力に基づき送
電線３の事故を判別する判別器で、その出力は図
示なしの遮断器に送られる。 Conventionally, there has been a device of this type as shown in FIG. 1-1 is a thyristor valve installed at the power transmission end, 1-2 is a thyristor valve installed at the power reception end, 2-1 is a DC reactor installed at the power transmission end, and 2-2 is a thyristor valve installed at the power reception end. A DC reactor 3 is connected to the thyristor valve 1-1 via the DC reactor 2-1, and a power transmission line 4 is connected to the thyristor valve 1-2 via the DC reactor 2-2 to transmit DC power. -1,4-
2 is a current transformer that detects the current at the transmitting end and the receiving end of the power transmission line 3, 5 is a transmission device that includes a transceiver and transmits the output of the current transformer 4-1, and 6 is the transmission device 5 and the transformer. An adder 7 adds up each output of the current flow device 4-2 with the polarity shown, and 7 is a discriminator that determines a fault on the power transmission line 3 based on the output of the adder 6, and the output is sent to a circuit breaker not shown. .
動作を説明する。送電線３が健全な状態では、
加算器６に対する２つの入力は互に等しく、加算
器６は零を出力し、判別器７は出力しない、即ち
事故ありの判別をしない。いま、送電線３上に図
示のような地絡事故Ｆが発生すると、これを介し
て電流が流れるので、加算器６の２つの入力は不
等となる。このため、加算器６の出力は零となら
ず、判別器７は事故ありの判別をする。 Explain the operation. When the power transmission line 3 is in good condition,
The two inputs to the adder 6 are equal to each other, the adder 6 outputs zero, and the discriminator 7 does not output, that is, it does not determine whether there is an accident. Now, when a ground fault F as shown in the figure occurs on the power transmission line 3, current flows through it, so the two inputs of the adder 6 become unequal. Therefore, the output of the adder 6 does not become zero, and the discriminator 7 determines whether there is an accident.
従来の保護継電装置は、上記のように構成され
ているので、事故の有無を判別するだけで、事故
点が送電線のどの部分であるかについては判定で
きない欠点があつた。 Since the conventional protective relay device is configured as described above, it has the disadvantage that it can only determine whether an accident has occurred, but cannot determine which part of the power transmission line the accident point is located on.
この発明は、上記のような従来装置の欠点を除
去するためになされたもので、送電線上の発生し
た事故点の位置を推定できる保護継電装置を提供
することを目的とする。 The present invention was made in order to eliminate the drawbacks of the conventional devices as described above, and an object of the present invention is to provide a protective relay device that can estimate the location of a fault point that has occurred on a power transmission line.
以下、この発明の一実施例を図について説明す
る。第２図はこの発明の保護継電装置のブロツク
図であり、第１図と同一符号は同一部分であるこ
とを示す。８は一次遅れの機能を有し、変流器４
−２の出力を遅延させる遅延回路、９は変流器４
−２の出力と遅延回路８の出力を図示の極性で加
算する加算器、１０は判別器７の出力により閉成
され、加算器９の出力を導く接点、１１は接点１
０を介して加算器６及び９の出力を導入し、それ
らの間の比及び送電線３の抵抗値より事故点を演
算により算出する演算回路である。 An embodiment of the present invention will be described below with reference to the drawings. FIG. 2 is a block diagram of the protective relay device of the present invention, and the same reference numerals as in FIG. 1 indicate the same parts. 8 has a first-order lag function, and current transformer 4
-2 is a delay circuit that delays the output of 2; 9 is a current transformer 4;
10 is a contact that is closed by the output of discriminator 7 and leads to the output of adder 9; 11 is contact 1;
This is an arithmetic circuit that introduces the outputs of adders 6 and 9 through 0 and calculates the fault point from the ratio between them and the resistance value of the power transmission line 3.
次に、第３図に示すベクトル図も参照して動作
を説明する。第２図において、Vs、Isは送電端
の電圧、電流、Vxは地絡地点Ｆの電圧、Vr、Ir
は受電端の電圧、電流、Ｒは２変換所間の送電線
の抵抗値、R1は送電端から地絡地点Ｆまでの抵
抗であり、次式のような関係を有する。 Next, the operation will be explained with reference to the vector diagram shown in FIG. In Figure 2, Vs and Is are voltage and current at the sending end, Vx is voltage at ground fault point F, Vr and Ir
are the voltage and current at the power receiving end, R is the resistance value of the power transmission line between the two converting stations, R1 is the resistance from the power transmission end to the ground fault point F, and has the following relationship.
Vs−Is・R1＝Vx ……(1)
Vx−Ir（Ｒ−R1）＝Vr ……(2)
送電線３が健全なときのその電流をＩとする
と、
Vs−Vr＝Ｉ・Ｒ ……(3)
(1)、(2)及び(3)式より次式の関係が得られる。 Vs-Is・R 1 = Vx...(1) Vx-Ir(R-R 1 )=Vr...(2) If the current when the transmission line 3 is healthy is I, then Vs-Vr=I・R...(3) From equations (1), (2), and (3), the following relationship is obtained.
R1＝Ｉ−Ir／Is−IrＲ ……(4)
遅延回路８は、変流器４−２の出力を遅延して
いるので、地絡事故Ｆが発生した時点では未だ健
全時の電流Ｉの値を出力している。従つて、加算
器９の出力は(4)式における（Ｉ−Ir）の値を有
し、一方加算器６の出力は(4)式における（Is−
Ir）の値を有する。地絡事故Ｆは、判別器７によ
り検出されるので、接点１０が閉成され、加算器
６，９の両出力が演算回路１１に入力され、ここ
で(4)式の左辺の演算が実行される。なお、抵抗Ｒ
は既知の値であり、演算回路１１内に予め設定さ
れている。(4)式の演算により、抵抗R1が求まれ
ば、送電線３の単位長の抵抗値も既知なので、地
絡事故Ｆの位置は確認される。 R 1 = I-Ir/Is-IrR ... (4) Since the delay circuit 8 delays the output of the current transformer 4-2, at the time when the ground fault F occurs, the normal current I is still It is outputting the value of . Therefore, the output of adder 9 has the value (I-Ir) in equation (4), while the output of adder 6 has the value (Is-Ir) in equation (4).
Ir). Since the ground fault F is detected by the discriminator 7, the contact 10 is closed and both outputs of the adders 6 and 9 are input to the calculation circuit 11, where the calculation on the left side of equation (4) is executed. be done. In addition, the resistance R
is a known value and is set in advance in the arithmetic circuit 11. If the resistance R 1 is found by calculating equation (4), the resistance value of the unit length of the power transmission line 3 is also known, so the location of the ground fault F can be confirmed.
なお、上記実施例は送電端より事故点までの距
離を計算することにより、事故点の位置を確定さ
せたが、事故点の位置が確定できればＲ−R1＝
Is−Ｉ／Is−Ir・Ｒの演算により事故点と受電端間の距
離も求められるのはいうまでもない。また、変流
器４−２の出力を受電端に伝送し、受電端で上記
実施例のような演算を実行させることでもよい。 In addition, in the above embodiment, the position of the fault point is determined by calculating the distance from the power transmission end to the fault point, but if the position of the fault point can be determined, R−R 1 =
It goes without saying that the distance between the fault point and the power receiving end can also be determined by calculating Is-I/Is-Ir.R. Alternatively, the output of the current transformer 4-2 may be transmitted to the power receiving end, and the calculations as in the above embodiments may be executed at the power receiving end.
以上のように、この発明によれば、遅延回路に
より送電線の健全時の電流を保持させ、この電流
が保持されている間に所定の演算を実行させたの
で、事故点の位置を容易に確定することができ
る。 As described above, according to the present invention, the current when the power transmission line is healthy is held by the delay circuit, and a predetermined calculation is executed while this current is held, so that the location of the fault point can be easily determined. It can be confirmed.
第１図は従来の保護継電装置のブロツク図、第
２図はこの発明の一実施例による保護継電装置の
ブロツク図、第３図は第２図に示す保護継電装置
の動作におけるベクトル図である。
４−１，４−２……変流器、５……伝送装置、
６，９……加算器、７……判別器、８……遅延回
路、１０……接点、１１……演算回路。なお、図
中、同一符号は同一部分を示す。
FIG. 1 is a block diagram of a conventional protective relay device, FIG. 2 is a block diagram of a protective relay device according to an embodiment of the present invention, and FIG. 3 is a vector diagram of the operation of the protective relay device shown in FIG. It is a diagram. 4-1, 4-2...Current transformer, 5...Transmission device,
6, 9...Adder, 7...Discriminator, 8...Delay circuit, 10...Contact, 11...Arithmetic circuit. In addition, in the figures, the same reference numerals indicate the same parts.
Claims (1)
ぞれ検出された電流の差を求める第１の演算回路
と、上記送電線の健全時における電流を保持する
保持回路と、自端電流と健全時における電流との
差を求める第２の演算回路と、上記第１及び第２
の演算器の出力間の比を算出し、予め設定された
上記送電線の抵抗値及び上記比より自端から上記
送電線上に発生した事故点までの距離を演算する
第３の演算回路とを備えた保護継電装置。 ２ 第３の演算回路は送電端より事故点までの距
離を演算することを特徴とする特許請求の範囲第
１項記載の保護継電装置。 ３ 第３の演算回路は受電端より事故点までの距
離を演算することを特徴とする特許請求の範囲第
１項記載の保護継電装置。[Scope of Claims] 1. A first calculation circuit that calculates the difference between currents detected at one end and the other end of a power transmission line that transmits DC power, and a holding circuit that maintains the current when the power transmission line is healthy. , a second arithmetic circuit that calculates the difference between the self-end current and the current in a healthy state, and the first and second
a third calculation circuit that calculates the ratio between the outputs of the calculation unit and calculates the distance from its own end to the accident point that occurred on the transmission line from a preset resistance value of the transmission line and the ratio; Equipped with protective relay device. 2. The protective relay device according to claim 1, wherein the third calculation circuit calculates the distance from the power transmission end to the fault point. 3. The protective relay device according to claim 1, wherein the third calculation circuit calculates the distance from the power receiving end to the fault point.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP56041397A JPS57153513A (en) | 1981-03-18 | 1981-03-18 | Protecting relay |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP56041397A JPS57153513A (en) | 1981-03-18 | 1981-03-18 | Protecting relay |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS57153513A JPS57153513A (en) | 1982-09-22 |
| JPS6361846B2 true JPS6361846B2 (en) | 1988-11-30 |
Family
ID=12607242
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP56041397A Granted JPS57153513A (en) | 1981-03-18 | 1981-03-18 | Protecting relay |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS57153513A (en) |
-
1981
- 1981-03-18 JP JP56041397A patent/JPS57153513A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS57153513A (en) | 1982-09-22 |
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