JPH0555731U - Circuit for detecting disconnection of transmission line that uses two circuits - Google Patents
Circuit for detecting disconnection of transmission line that uses two circuitsInfo
- Publication number
- JPH0555731U JPH0555731U JP10764391U JP10764391U JPH0555731U JP H0555731 U JPH0555731 U JP H0555731U JP 10764391 U JP10764391 U JP 10764391U JP 10764391 U JP10764391 U JP 10764391U JP H0555731 U JPH0555731 U JP H0555731U
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- line
- phase current
- disconnection
- relay
- phase
- Prior art date
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Abstract
(57)【要約】
【目的】 ２回線併用送電線の断線事故時に断線回線選
択能力を持ち、故障回線のみ遮断停止させて負荷供給に
支障を来さないようにした。
【構成】 ２回線併用送電線のそれぞれに地絡過電流継
電器５，１１を設けると共に、各回線に正相電流抽出リ
レー１，２，３，７，８，９および逆相電流抽出リレー
１，２，３，７，８，９を設け、この正相電流抽出リレ
ーおよび逆相電流抽出リレーよりの正相電流および逆相
電流のベクトルを比較して断線回線を判定させる選択遮
断回路６，１２を構成したものである。
(57) [Summary] [Purpose] In the event of a disconnection accident of a two-line combined transmission line, the disconnection line selection capability is provided, and only the faulty line is cut off and stopped so as not to hinder load supply. [Configuration] Ground fault overcurrent relays 5 and 11 are provided on each of the two-line combined transmission lines, and positive-phase current extraction relays 1, 2, 3, 7, 8, 9 and negative-phase current extraction relays 1 and 2 are provided on each line. , 3, 7, 8 and 9 are provided, and selective cutoff circuits 6 and 12 for comparing the vectors of the positive-phase current and the negative-phase current from the positive-phase current extraction relay and the negative-phase current extraction relay to determine the broken line are provided. It is composed.
Description
【０００１】[0001]
この考案は系統保護のための２回線併用送電線の断線検出回路に関するもので ある。 This invention relates to a disconnection detection circuit for a two-line combined transmission line for system protection.
【０００２】[0002]
周知のように２回線併用送電線の断線事故は地絡過電流継電器によって保護し ている。従来の２回線併用送電線の断線事故に対する保護は図８に示すように２ ，回線併用送電線の各相に地絡過電流継電器（以下５１Ｇリレーと記す）を設け た構成となっている。 As is well known, the ground fault overcurrent relay protects the accidental disconnection of the transmission line with two circuits. As shown in Fig. 8, the conventional protection against disconnection of the two-line combined power transmission line is 2, and a ground fault overcurrent relay (hereinafter referred to as 51G relay) is provided in each phase of the two-line combined transmission line.
【０００３】 いま、１Ｌｂ相に断線事故（図中×印）が発生した場合を仮定して説明すると 、１Ｌｂ相断線時には１Ｌｂ相電流がなくなり、残留回路に零相電流が流れる。 このため、零相電流入力により１Ｌ５１Ｇリレーが動作し、断線と判定して１Ｌ 遮断器開放指令を送る。そして、１Ｌ遮断器開放により１Ｌ回線停止となり、事 故が系統から除去される。Now, assuming that a disconnection accident (marked with X in the figure) occurs in the 1Lb phase, the 1Lb phase current disappears when the 1Lb phase disconnects, and a zero-phase current flows in the residual circuit. Therefore, the 1L51G relay operates due to the zero-phase current input, determines that the wire is broken, and sends a 1L breaker open command. When the 1L circuit breaker is opened, the 1L line is stopped and the cause is removed from the system.
【０００４】[0004]
従来の２回線併用送電線の断線検出回路は以上のように構成されているので、 例えば１Ｌｂ相断線時には１Ｌｂ相電流がなくなり、残留回路に零相電流が流れ るため１Ｌ側５１Ｇリレーが動作し、１Ｌ遮断器開放となる。この場合、断線が 起きていない健全回路である２Ｌ側は２Ｌｂ相電流が大きくなり、残留回路に零 相電流が流れる。この零相電流入力により２Ｌ側５１Ｇリレーが動作してしまい 、２Ｌ遮断器開放となる。すなわち、この１Ｌ断線事故の場合は、１Ｌのみ回線 停止し、健全回線である２Ｌは回線停止する必要はないにも拘わらず、１Ｌ断線 事故により１Ｌと２Ｌとが回線停止となり、負荷が供給できなくなるという問題 点があった。 Since the conventional disconnection detection circuit for a dual-line transmission line is configured as described above, for example, when the 1Lb phase is disconnected, the 1Lb phase current disappears and the zero-phase current flows in the residual circuit, causing the 1L side 51G relay to operate. 1L circuit breaker is opened. In this case, the 2Lb phase current increases on the 2L side, which is a sound circuit in which no disconnection occurs, and the zero phase current flows in the residual circuit. Due to this zero-phase current input, the 2L side 51G relay operates and the 2L circuit breaker opens. In other words, in the case of this 1L disconnection accident, it is not necessary to stop the line only for the 1L and to stop the line for the healthy 2L, but the 1L disconnection accident causes the lines of 1L and 2L to stop and the load can be supplied. There was a problem of disappearing.
【０００５】 すなわち、２回線併用送電線の一方の回線断線事故の場合は断線回線を正しく 選択できれば、負荷は健全回線を通して供給し続けることができる。しかし回線 併用送電線の断線事故を５１Ｇリレーによって保護しているため、回線選択能力 がないという問題点があった。このため、従来は断線時の負荷供給に支障をきた しており、断線時の回線選択能力のある保護継電器の導入が求められていた。That is, in the case of a line disconnection accident of one of the two-line combined transmission lines, if the line disconnection can be correctly selected, the load can be continuously supplied through the healthy line. However, since the 51G relay protects the disconnection accident of the transmission line with circuit, there is a problem that it does not have the circuit selection ability. For this reason, conventionally, there was a hindrance to load supply at the time of disconnection, and there was a demand for the introduction of protective relays with line selection capability at the time of disconnection.
【０００６】 この考案は上記の問題点を解消するためになされたもので、２回線併用送電線 の断線事故時に断線回線選択能力を持ち、故障回線のみ遮断停止させて負荷供給 に支障を来さないようにした２回線併用送電線の断線検出回路を提供することを 目的とする。The present invention has been made to solve the above-mentioned problems, and has a disconnection line selection capability in the case of a disconnection accident of a two-line combined transmission line, and interrupts and stops only the faulty line to hinder load supply. It is an object of the present invention to provide a disconnection detection circuit for a two-line combined transmission line, which is designed to eliminate such a situation.
【０００７】[0007]
この考案に係る２回線併用送電線の断線検出回路は２回線併用送電線のそれぞ れに地絡過電流継電器を設けると共に、各回線に正相電流抽出リレーおよび逆相 電流抽出リレーを設け、この正相電流抽出リレーおよび逆相電流抽出リレーより の正相電流および逆相電流のベクトルを比較して断線回線を判定させる選択遮断 回路を構成したものである。 The disconnection detection circuit of the two-line combined transmission line according to the present invention is provided with a ground fault overcurrent relay for each two-line combined transmission line, and a positive-phase current extraction relay and a negative-phase current extraction relay are provided for each line. It consists of a selective cutoff circuit that compares the vectors of the positive-phase current and the negative-phase current from the positive-phase current extraction relay and the negative-phase current extraction relay to determine the broken line.
【０００８】[0008]
この考案における２回線併用送電線の断線検出回路は各回線に設けた正相電流 抽出リレーおよび逆相電流抽出リレーよりの正相電流および逆相電流のベクトル を比較して断線を判定させるようにしたものである。 The disconnection detection circuit of the two-line combined transmission line in this invention is designed to determine the disconnection by comparing the vectors of the positive-phase current and the negative-phase current from the positive-phase current extraction relay and the negative-phase current extraction relay provided in each line. It was done.
【０００９】[0009]
以下、この考案の一実施例を図について説明する。図１はこの考案の一実施例 を示す回路図で、図１において、１は１Ｌａ相断線検出リレー、２は１Ｌｂ相断 線検出リレー、３は１Ｌｃ相断線検出リレー、４は１Ｌａ相断線検出リレー１と １Ｌｂ相断線検出リレー２と１Ｌｃ相断線検出リレー３との出力が導かれる１Ｌ 相オアゲート、５は１Ｌ側５１Ｇリレー、６は１Ｌ選択遮断アンドゲート、７は ２Ｌａ相断線検出リレー、８は２Ｌｂ相断線検出リレー、９は２Ｌｃ相断線検出 リレー、１０は２Ｌａ相断線検出リレー７と２Ｌｂ相断線検出リレー８と２Ｌｃ 相断線検出リレー９との出力が導かれる２Ｌ相オアゲート、１１は２Ｌ側５１Ｇ リレー、１２は２Ｌ選択遮断アンドゲートである。 An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a circuit diagram showing an embodiment of the present invention. In FIG. 1, 1 is a 1La phase disconnection detection relay, 2 is a 1Lb phase disconnection detection relay, 3 is a 1Lc phase disconnection detection relay, and 4 is a 1La phase disconnection detection. Relays 1 and 1Lb phase disconnection detection relays 2 and 1Lc phase disconnection detection relays 3 outputs 1L phase OR gate, 5 1L side 51G relay, 6 1L selective cut-off and gate, 7 2La phase disconnection detection relay, 8 Is a 2Lb phase disconnection detection relay, 9 is a 2Lc phase disconnection detection relay, 10 is a 2L phase OR gate through which outputs of the 2La phase disconnection detection relay 7, 2Lb phase disconnection detection relay 8 and 2Lc phase disconnection detection relay 9 are provided, and 11 is 2L Side 51G relay, 12 is a 2L selective cutoff and gate.
【００１０】 次に動作について説明する。図２から図７は実際の断線時の応動を示すもので 、各図に示すベクトル図は正相，逆相および零相電流をそれぞれ示す。Next, the operation will be described. 2 to 7 show the response at the time of actual disconnection, and the vector diagrams shown in each figure show the positive-phase, negative-phase, and zero-phase currents, respectively.
【００１１】 図２Ａ，Ｂは１Ｌａ相断線時の１Ｌに現れる電流の関係と２Ｌに現れる電流の 関係とを、図３Ａ，Ｂは１Ｌｂ相断線時の１Ｌに現れる電流の関係と２Ｌに現れ る電流の関係とを、図４Ａ，Ｂは１Ｌｃ相断線時の１Ｌに現れる電流の関係と２ Ｌに現れる電流の関係とをそれぞれ示す。2A and 2B show the relationship between the current appearing in 1L and the current appearing in 2L when the 1La phase is broken, and FIGS. 3A and 3B show the relationship between the current appearing in 1L and the 2L when the 1Lb phase is broken. FIGS. 4A and 4B show the relationship between the currents and the relationship between the currents that appear in 1L and the currents that appear in 2L when the 1Lc phase is broken.
【００１２】 図２Ａ，Ｂの１Ｌａ相断線時には故障回線側の１Ｌの正相電流と逆相電流との 位相関係は２Ｉ1＝−Ｉ2となる。健全回線側の２Ｌの正相電流と逆相電流との位 相関係は４Ｉ1＝Ｉ2となる。よって図１の１Ｌａ相断線検出リレー１は動作とな り、その他の断線検出リレーは不動作となる。したがって、１Ｌ選択遮断アンド ゲート６は１Ｌ断線検出するので、正動作する。When the 1La phase is broken in FIGS. 2A and 2B, the phase relationship between the 1L positive-phase current and the negative-phase current on the fault line side is 2I 1 = −I 2 . The phase relationship between the positive-phase current and negative-phase current of 2 L on the healthy line side is 4I 1 = I 2 . Therefore, the 1La phase disconnection detection relay 1 in FIG. 1 is in operation, and the other disconnection detection relays are in operation. Therefore, the 1L selective cutoff and gate 6 detects the 1L disconnection, and operates normally.
【００１３】 同様に図３Ａ，Ｂの１Ｌｂ相断線時には故障回線側の１Ｌの正相電流と逆相電 流との位相関係は２Ｉ1＝−ａＩ2となる。健全回線側の２Ｌの正相電流と逆相電 流との位相関係は４Ｉ1＝ａＩ2となる。よって、図１の１Ｌｂ相断線検出リレー ２は動作となり、その他の断線検出リレーは不動作となる。したがって、１Ｌ選 択遮断アンドゲート６は１Ｌ断線検出するので、正動作となる。Similarly, when the 1 Lb phase is broken in FIGS. 3A and 3B, the phase relationship between the 1 L positive-phase current and the negative-phase current on the fault line side is 2I 1 = −aI 2 . The phase relationship between the 2 L positive-phase current and the negative-phase current on the healthy line side is 4I 1 = aI 2 . Therefore, the 1-Lb phase disconnection detection relay 2 in FIG. 1 is in operation, and the other disconnection detection relays are in operation. Therefore, the 1L selection cutoff AND gate 6 detects the 1L disconnection, so that the normal operation is performed.
【００１４】 図４Ａ，Ｂの１Ｌｃ相断線時には故障回線側の１Ｌの正相電流と逆相電流との 位相関係は２Ｉ1＝−ａ2Ｉ2となる。健全回線側の２Ｌの正相電流と逆相電流と の位相関係は４Ｉ1＝ａ2Ｉ2となる。よって、図１の１Ｌｃ相断線検出リレー３ は動作となり、その他の断線検出リレーは不動作となる。したがって、１Ｌ選択 遮断アンドゲート６は１Ｌ断線検出するので、正動作となる。When the 1Lc phase is broken in FIGS. 4A and 4B, the phase relationship between the 1L positive-phase current and the negative-phase current on the fault line side is 2I 1 = −a 2 I 2 . The phase relationship between the positive-phase current and negative-phase current of 2 L on the healthy line side is 4I 1 = a 2 I 2 . Therefore, the 1Lc phase disconnection detection relay 3 in FIG. 1 is in operation, and the other disconnection detection relays are in operation. Therefore, the 1L selective cutoff AND gate 6 detects the 1L disconnection, and thus the normal operation is performed.
【００１５】 以下同様に図５Ａ，Ｂから図７Ａ，Ｂに示す２Ｌ断線時にも図１の故障回線側 の２Ｌの断線検出リレーが動作となり、その他の断線検出リレーは不動作となる 。したがって、２Ｌ選択遮断アンドゲート１２は２Ｌ断線検出するので、正動作 となり、断線回線を正しく判別できる。１Ｌ断線時および２Ｌ断線時の正相電流 、逆相電流および零相電流のベクトル量を表に示すと表１のようになる。Similarly, in the case of the 2L disconnection shown in FIGS. 5A and 5B to 7A and 7B, the 2L disconnection detection relay on the fault line side in FIG. 1 operates, and the other disconnection detection relays do not operate. Therefore, the 2L selective cutoff AND gate 12 detects the 2L disconnection, so that the normal operation is performed and the disconnection line can be correctly identified. Table 1 shows the vector amounts of the positive-phase current, the negative-phase current, and the zero-phase current at the time of 1L disconnection and 2L disconnection.
【００１６】[0016]
【表１】 [Table 1]
【００１７】[0017]
以上のようにこの考案によれば２回線併用送電線のそれぞれに地絡過電流継電 器を設けると共に、各回線に正相電流抽出リレーおよび逆相電流抽出リレーを設 け、この正相電流抽出リレーおよび逆相電流抽出リレーよりの正相電流および逆 相電流のベクトルを比較して断線回線を判定させる選択遮断回路を設けたので、 ２回線併用送電線の断線事故時に断線回線選択能力を持ち、故障回線のみ遮断停 止させて負荷供給に支障を来さないという効果が得られる。 As described above, according to the present invention, a ground fault overcurrent relay is provided for each two-line combined transmission line, and a positive-phase current extraction relay and a negative-phase current extraction relay are provided for each line. Since a selective cutoff circuit is provided to judge the broken line by comparing the vectors of the positive-phase current and the negative-phase current from the relay and the negative-phase current extraction relay, it has the ability to select the broken line in the case of a two-line transmission line disconnection accident. The effect that the load supply is not hindered by shutting off and stopping only the faulty line is obtained.
【図１】この考案に係る２回線併用送電線の断線検出回
路の一実施例を示す回路図。FIG. 1 is a circuit diagram showing an embodiment of a disconnection detection circuit for a two-line combined transmission line according to the present invention.
【図２】１Ｌａ相回線断線の応動を説明するベクトル
図。FIG. 2 is a vector diagram for explaining a response to a 1-La phase line disconnection.
【図３】１Ｌｂ相回線断線の応動を説明するベクトル
図。FIG. 3 is a vector diagram for explaining the response to a 1 Lb phase line disconnection.
【図４】１Ｌｃ相回線断線の応動を説明するベクトル
図。FIG. 4 is a vector diagram for explaining the response of 1Lc phase line disconnection.
【図５】２Ｌａ相回線断線の応動を説明するベクトル
図。FIG. 5 is a vector diagram for explaining a response to a 2La phase line disconnection.
【図６】２Ｌｂ相回線断線の応動を説明するベクトル
図。FIG. 6 is a vector diagram for explaining a response to a 2Lb phase line disconnection.
【図７】２Ｌｃ相回線断線の応動を説明するベクトル
図。FIG. 7 is a vector diagram for explaining the response of a 2Lc phase line disconnection.
【図８】従来の２回線併用送電線の断線検出回路の１例
を示す回路図。FIG. 8 is a circuit diagram showing an example of a conventional disconnection detection circuit for a two-line combined transmission line.
５…１Ｌ側地絡過電流継電器、６…１Ｌ選択遮断回路
（１Ｌ選択遮断アンドゲート）、１１…２Ｌ側地絡過電
流継電器、１２…２Ｌ選択遮断回路（２Ｌ選択遮断アン
ドゲート）。5 ... 1L side ground fault overcurrent relay, 6 ... 1L selective interruption circuit (1L selective interruption and gate), 11 ... 2L side ground fault overcurrent relay, 12 ... 2L selective interruption circuit (2L selective interruption and gate).
Claims (1)
流継電器を設け、上記送電線の断線事故に伴って残留回
路に流れる零相電流により地絡過電流継電器を動作させ
て遮断器開放指令を送るようにした２回線併用送電線の
断線検出回路において、 上記地絡過電流継電器の他に各回線に正相電流抽出リレ
ー、逆相電流抽出リレーを設けると共に、正相電流抽出
リレーおよび逆相電流抽出リレーよりの正相電流および
逆相電流のベクトルを比較して断線回線を判定させる選
択遮断回路を設けたことを特徴とする２回線併用送電線
の断線検出回路。1. A ground fault overcurrent relay is provided for each of the two-line combined transmission lines, and a ground fault overcurrent relay is operated by a zero-phase current flowing in a residual circuit due to a disconnection accident of the transmission line to issue a circuit breaker opening command. In the disconnection detection circuit of the two-line combined transmission line that is configured to send, in addition to the ground fault overcurrent relay, a positive phase current extraction relay and a negative phase current extraction relay are provided in each line, and a positive phase current extraction relay and a negative phase current are also provided. A disconnection detection circuit for a two-line combined transmission line, comprising a selective disconnection circuit for comparing the vectors of the positive-phase current and the negative-phase current from the extraction relay to determine the disconnection line.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10764391U JPH0555731U (en) | 1991-12-27 | 1991-12-27 | Circuit for detecting disconnection of transmission line that uses two circuits |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10764391U JPH0555731U (en) | 1991-12-27 | 1991-12-27 | Circuit for detecting disconnection of transmission line that uses two circuits |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0555731U true JPH0555731U (en) | 1993-07-23 |
Family
ID=14464396
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP10764391U Pending JPH0555731U (en) | 1991-12-27 | 1991-12-27 | Circuit for detecting disconnection of transmission line that uses two circuits |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0555731U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2009081937A (en) * | 2007-09-26 | 2009-04-16 | Chugoku Electric Power Co Inc:The | Open circuit protection relay |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS62102166A (en) * | 1985-10-30 | 1987-05-12 | Meidensha Electric Mfg Co Ltd | Method for detecting defective phase |
| JPH0260414A (en) * | 1988-08-25 | 1990-02-28 | Toshiba Corp | Transmission line protection system |
-
1991
- 1991-12-27 JP JP10764391U patent/JPH0555731U/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS62102166A (en) * | 1985-10-30 | 1987-05-12 | Meidensha Electric Mfg Co Ltd | Method for detecting defective phase |
| JPH0260414A (en) * | 1988-08-25 | 1990-02-28 | Toshiba Corp | Transmission line protection system |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2009081937A (en) * | 2007-09-26 | 2009-04-16 | Chugoku Electric Power Co Inc:The | Open circuit protection relay |
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