JP2920189B2 - DC voltage detector - Google Patents
DC voltage detectorInfo
- Publication number
- JP2920189B2 JP2920189B2 JP8661290A JP8661290A JP2920189B2 JP 2920189 B2 JP2920189 B2 JP 2920189B2 JP 8661290 A JP8661290 A JP 8661290A JP 8661290 A JP8661290 A JP 8661290A JP 2920189 B2 JP2920189 B2 JP 2920189B2
- Authority
- JP
- Japan
- Prior art keywords
- discharge tube
- capacitor
- pulse
- pulse generating
- pulse generation
- 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 - Lifetime
Links
- 239000003990 capacitor Substances 0.000 claims description 31
- 239000002184 metal Substances 0.000 claims description 4
- 229910052751 metal Inorganic materials 0.000 claims description 4
- 238000001514 detection method Methods 0.000 claims description 3
- 230000001629 suppression Effects 0.000 claims 1
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 4
- 230000005540 biological transmission Effects 0.000 description 4
- 239000006096 absorbing agent Substances 0.000 description 2
- 229910052742 iron Inorganic materials 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000001681 protective effect Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000007935 neutral effect Effects 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
Landscapes
- Locating Faults (AREA)
- Testing Of Short-Circuits, Discontinuities, Leakage, Or Incorrect Line Connections (AREA)
Description
【発明の詳細な説明】 （産業上の利用分野） この発明は例えばき電線と大地との間で発生する地絡
を検出する直流電圧検出器に関するものである。Description: TECHNICAL FIELD The present invention relates to a DC voltage detector for detecting a ground fault generated between, for example, a feeder line and the ground.
（従来の技術） 本出願人等は先の出願（特願昭62−235837号（特開平
01−78941号公報））にて直流き電回路保護方式を提案
した。この方式は橋梁、電車線支持ビーム等の金属体と
レールのインピーダンスボンド中性点に強制短絡用の回
路保護装置を設けて、き電線が地絡した際に、上記き電
線を支持するビーム等をレールに強制的に短絡するよう
に構成されている。また上記き電線は変電所に接続し、
変電所には保護継電器を設けられている。この発明に関
連する他の出願として特願昭63−230563号（特願平02−
77338号公報）がある。(Prior Art) The present applicants filed an earlier application (Japanese Patent Application No. 62-235837
01-78941)) proposed a DC feeder circuit protection method. In this method, a circuit protection device for forced short circuit is installed at the neutral point of the impedance bond between the rail and the metal body such as a bridge or train line support beam, and when the feeder line is grounded, the beam etc. Is forcibly short-circuited to the rail. In addition, the above feeder cable is connected to the substation,
Substations are provided with protective relays. As another application related to the present invention, Japanese Patent Application No. 63-230563 (Japanese Patent Application No.
No. 77338).
（発明が解決しようとする課題） しかしながら上記先行技術においては、保護装置によ
って強制的に短絡させると、変電所の保護継電器が作動
して、き電線への送電が広範囲にわたって停止してしま
い、鉄道の運行を確保できないという現象が生じる。し
たがって上記地絡故障発生時に、き電線への送電を停止
する範囲をできるだけ狭くするために、き電線の地絡故
障が発生している場所を確実に特定し得るような装置が
要望されている。(Problems to be Solved by the Invention) However, in the above-mentioned prior art, if a short circuit is forcibly performed by a protection device, a protection relay of a substation is activated, and power transmission to a feeder line is stopped over a wide range. The phenomenon that the operation of the train cannot be secured occurs. Therefore, in order to minimize the range in which power transmission to the feeder line is stopped when the ground fault occurs, there is a demand for a device that can reliably identify a place where the ground fault of the feeder line has occurred. .
この発明は上記従来の事情を考慮してなされたもので
あって、その目的は、き電線と大地間で発生する地絡故
障を検出して故障箇所を特定できる直流電圧検出器を提
供することにあり、更に例えば大規模駅構内のように多
数の群線を有し、かつ鉄道情報電送網が整備されている
ような箇所、地域に好適な直流電圧検出器を提供するこ
とにある。SUMMARY OF THE INVENTION The present invention has been made in consideration of the above-described conventional circumstances, and an object thereof is to provide a DC voltage detector capable of detecting a ground fault occurring between a feeder line and the ground and specifying a fault location. Another object of the present invention is to provide a DC voltage detector suitable for a place or area where a large number of group lines are provided and a railway information transmission network is provided, for example, in a large-scale station premises.
（課題を解決するための手段） そこでこの発明の直流電圧検出器においては、橋梁、
電車線支持ビーム等の金属体に接続される第１リード
と、レール側に接続される第１リードとの間に、第１パ
ルス発生用コンデンサを接続する一方、この第１パルス
発生用コンデンサと並列に第１パルス発生用放電管と第
２パルス発生用コンデンサの直列接続されたものを接続
し、また第２パルス発生用コンデンサと並列に第２パル
ス発生用放電管と通電検出手段（ドライバ）を直列接続
し、第２パルス発生用放電管の作動により地絡故障を検
出するようにしている。(Means for Solving the Problems) Therefore, in the DC voltage detector of the present invention, a bridge,
A first pulse generating capacitor is connected between a first lead connected to a metal body such as an trolley wire supporting beam and a first lead connected to the rail, and the first pulse generating capacitor is connected to the first lead. A first pulse generation discharge tube and a second pulse generation capacitor connected in series are connected in parallel, and a second pulse generation discharge tube and conduction detection means (driver) are connected in parallel with the second pulse generation capacitor. Are connected in series, and a ground fault is detected by the operation of the discharge tube for generating the second pulse.
（作用） 上記構成の直流電圧検出器においては、第１、第２両
リード線間に地絡に起因する電圧が発生し、第１パルス
発生用コンデンサの端子電圧が次第に上昇し、これが所
定電圧に達すると第１パルス発生用放電管が放電作動し
て第２パルス発生用コンデンサを充電する。次に第２パ
ルス発生用コンデンサの端子間電圧が所定電圧に達する
と第２パルス発生用放電管が放電作動する。この第２パ
ルス発生用放電管の放電衝動を通電検出手段で検出し、
地絡故障発生箇所を検知する。(Operation) In the DC voltage detector having the above-described configuration, a voltage due to a ground fault is generated between the first and second lead wires, and the terminal voltage of the first pulse generating capacitor gradually increases, and this voltage is increased to a predetermined voltage. , The discharge tube for generating the first pulse discharges to charge the capacitor for generating the second pulse. Next, when the inter-terminal voltage of the second pulse generating capacitor reaches a predetermined voltage, the second pulse generating discharge tube starts discharging. The discharge impulse of the discharge tube for generating the second pulse is detected by the conduction detecting means,
Detect the ground fault occurrence location.
（実施例） 次にこの発明の直流電圧検出器の具体的な実施例につ
いて、図面を参照しつつ詳細に説明する。Embodiment Next, a specific embodiment of the DC voltage detector according to the present invention will be described in detail with reference to the drawings.
直流電気鉄道のき電回路を概略的に示す第２図におい
て、14は変電所、15は電線、16はき電線15等を支持する
ビーム（電車線支持ビーム）、17は上記ビーム16を支持
するコンクリート柱、18はレール、20は大地、21はトロ
リー線をそれぞれ示している。上記き電線15は周知の通
り変電所に接続され、この変電所には図示されていない
が保護継電器が設けられている。また、図中Ａは本発明
による直流電圧検出器であるが、この直流電圧検出器Ａ
は、き電線15がビーム16に、例えば点22において短絡し
た際に作動し、上記短絡による地絡を検出すると共に、
地絡発生箇所を検知する機能を有している。In FIG. 2 schematically showing a feeder circuit of a DC electric railway, 14 is a substation, 15 is an electric wire, 16 is a beam supporting a feeder wire 15 and the like (train line support beam), and 17 is a beam supporting the above beam 16 Concrete pillars, 18 are rails, 20 is ground, and 21 is a trolley line. As is well known, the feeder line 15 is connected to a substation, which is provided with a protective relay (not shown). In the figure, A is a DC voltage detector according to the present invention.
Operates when the feeder line 15 is short-circuited to the beam 16, for example, at the point 22, and detects a ground fault due to the short-circuit,
It has the function of detecting the ground fault occurrence location.
上記直流電圧検出器Ａを示す第１図において、１は第
１リード、２は第２リードをそれぞれ示しているが、第
１リード１は例えば上記ビーム16、橋梁等の金属体構造
物に、また第２リード２は上記レール18側へそれぞれ接
続されるものである。上記第１及び第２リード１、２間
には、サージアブゾーバ用抵抗３と第１パルス発生用コ
ンデンサ４との直列接続回路が接続されている。また上
記第１パルス発生用コンデンサ４には、第１パルス発生
用放電管（放電管）６と第２パルス発生用コンデンサ５
とが直列接続されたものが並列接続されている。さらに
第２パルス発生用コンデンサ５には、第２パルス発生用
放電管（放電管）７とドライバ８、例えばリレー、フォ
トカプラとの直列接続されたものが並列接続されて閉回
路を構成している。上記ドライバ８は電流が流れたとき
に開成する常閉の自己保持型のドライバであり、その開
成作動に伴って開成動作するドライバ端子９、10を有し
ている。このドライバ端子９は動作表示接点11、12を開
成する機能を備え、またドライバ端子10は第１、第２放
電管の作動を停止する機能を備えた回路を構成してい
る。これらの第１パルス発生用コンデンサ５から動作表
示接点11、12によって通電検出手段が構成されている。In FIG. 1 showing the DC voltage detector A, reference numeral 1 denotes a first lead, and reference numeral 2 denotes a second lead. The first lead 1 is, for example, a metal structure such as the beam 16 or a bridge. The second leads 2 are connected to the rails 18 respectively. A series connection circuit of a surge absorber resistor 3 and a first pulse generating capacitor 4 is connected between the first and second leads 1 and 2. The first pulse generating capacitor 4 includes a first pulse generating discharge tube (discharge tube) 6 and a second pulse generating capacitor 5.
Are connected in series and are connected in parallel. Further, the second pulse generating capacitor 5 is connected in parallel with a second pulse generating discharge tube (discharge tube) 7 and a driver 8, for example, a relay and a photocoupler, which are connected in series to form a closed circuit. I have. The driver 8 is a normally-closed self-holding driver that opens when a current flows, and has driver terminals 9 and 10 that open in accordance with the opening operation. The driver terminal 9 has a function of opening the operation display contacts 11 and 12, and the driver terminal 10 constitutes a circuit having a function of stopping the operation of the first and second discharge tubes. The first pulse generating capacitor 5 and the operation display contacts 11 and 12 constitute an energization detecting means.
次に上記検出器の作動状態について説明する。まず第
１及び第２リード１、２間に電圧が印加されると第１パ
ルス発生用コンデンサ４への充電が行われる。第１パル
ス発生用コンデンサ４の端子電圧が次第に上昇して、第
１パルス発生用放電管６の放電開始電圧に達すると、こ
の第１パルス発生用放電管６が放電し、第２パルス発生
用コンデンサ５へ充電される。第２パルス発生用コンデ
ンサ５の端子間電圧が次第に上昇し、第２パルス発生用
放電管７の放電開始電圧に達すると、第２パルス発生用
放電管７を放電作動させると共に、上記ドライバ８を開
成動作させる。この開成動作に伴ってドライバ端子９が
上記動作表示接点11、12を開成し、その際の出力信号で
もって鉄道用情報電送網を通じて地絡故障発生箇所が検
知されることになる。また上記ドライバ８の開成動作に
伴ってドライバ端子10が閉成し、第１パルス発生用コン
デンサ４の端子間において抵抗13による閉回路を構成
し、第１パルス発生用コンデンサ４への充電を停止し、
第１、第２パルス発生用放電管の作動を停止する。Next, an operation state of the detector will be described. First, when a voltage is applied between the first and second leads 1 and 2, the first pulse generating capacitor 4 is charged. When the terminal voltage of the first pulse generation capacitor 4 gradually rises and reaches the discharge starting voltage of the first pulse generation discharge tube 6, the first pulse generation discharge tube 6 discharges and the second pulse generation discharge tube 6 discharges. The capacitor 5 is charged. When the voltage between the terminals of the second pulse generating capacitor 5 gradually increases and reaches the discharge starting voltage of the second pulse generating discharge tube 7, the discharge operation of the second pulse generating discharge tube 7 is performed, and the driver 8 is operated. Open operation. With the opening operation, the driver terminal 9 opens the operation display contacts 11 and 12, and the output signal at that time detects the ground fault occurrence location through the railway information transmission network. Further, the driver terminal 10 is closed with the opening operation of the driver 8, and a closed circuit is formed by the resistor 13 between the terminals of the first pulse generating capacitor 4, and the charging of the first pulse generating capacitor 4 is stopped. And
The operation of the first and second pulse generating discharge tubes is stopped.
一方、上記検出器Ａに対してサージ電圧、つまり高い
電圧が短時間に作用する場合には、上記第１パルス発生
用コンデンサ４への充電が充分には行われず、そのため
第１パルス発生用コンデンサ４の端子電圧がさほど上昇
しないために検知動作は防止される。On the other hand, when a surge voltage, that is, a high voltage acts on the detector A in a short time, the charging of the first pulse generating capacitor 4 is not sufficiently performed. The detection operation is prevented because the terminal voltage of No. 4 does not increase so much.
上記実施例においては、コンクリート柱17を採用して
いるので、連携線方式を採用しているが、鉄柱及び鉄構
等の場合は直流電圧検出器Ａを個々に設置する方式を基
準としている。In the above embodiment, since the concrete pillar 17 is employed, the cooperative wire system is employed. However, in the case of an iron pole or an iron frame, the system in which the DC voltage detector A is individually installed is used as a reference.
（発明の効果） 上記したようにこの発明の直流電圧検出器において
は、第１、第２両リード線間に地絡に起因する電圧が発
生すると、第１パルス発生用コンデンサの端子間電圧が
上昇し、これが所定電圧に達すると第１パルス発生用放
電管を放電作動させ、第２パルス発生用コンデンサに充
電し、第２パルス発生用コンデンサの端子間電圧が所定
電圧に達して第２パルス発生用放電管を放電作用させ
て、この第２パルス発生用放電管の通電状態を通電検出
手段で検出し、これにより地絡故障発生箇所を確実に検
知することができる。(Effect of the Invention) As described above, in the DC voltage detector of the present invention, when a voltage due to a ground fault is generated between the first and second lead wires, the voltage between the terminals of the first pulse generating capacitor is reduced. When the voltage reaches a predetermined voltage, the discharge tube for generating the first pulse is discharged to charge the capacitor for generating the second pulse, and the voltage between the terminals of the capacitor for generating the second pulse reaches the predetermined voltage and the second pulse is generated. By causing the discharge tube for generation to discharge, the energization state of the second pulse generation discharge tube is detected by the energization detecting means, whereby the location where the ground fault has occurred can be reliably detected.
このように高抵抗地絡故障を確実に検知することによ
り、支持物の電位上昇による人や設備への危害、直流迷
走電流による信号・通信設備の損傷、支持物の損傷及び
き電線断線等の二次災害が防止でき、また復旧に要する
多大な労力と経費が節減できる。By reliably detecting a high-resistance ground fault as described above, it is possible to prevent harm to people and equipment due to a rise in the potential of the support, damage to signal and communication equipment due to DC stray current, damage to the support, and breakage of feeder wires. Secondary disasters can be prevented, and enormous labor and costs required for recovery can be saved.
第１図はこの発明を採用した直流電圧検出器の回路図、
第２図はこの発明による直流電圧検出器の使用例を示す
構造略図である。 １……第１リード、２……第２リード、３……サージア
ブソーバ用抵抗、４……第１パルス発生用コンデンサ
（コンデンサ）、５……第２パルス発生用コンデンサ
（コンデンサ）、６……第１パルス発生用放電管（放電
管）、７……第２パルス発生用放電管（放電管）、８…
…ドライバ、９、10……ドライバ端子、11、12……動作
表示接点、13……抵抗。FIG. 1 is a circuit diagram of a DC voltage detector employing the present invention,
FIG. 2 is a schematic structural view showing an example of use of the DC voltage detector according to the present invention. 1... First lead, 2... Second lead, 3... Resistor for surge absorber, 4... 1st pulse generating capacitor (capacitor), 5... 2nd pulse generating capacitor (capacitor), 6. ... Discharge tube for first pulse generation (discharge tube), 7... Discharge tube for second pulse generation (discharge tube), 8.
... Driver, 9,10 ... Driver terminal, 11,12 ... Operation display contact, 13 ... Resistance.
───────────────────────────────────────────────────── フロントページの続き (56)参考文献 特開 平１−78941（ＪＰ，Ａ) 特開 平２−77338（ＪＰ，Ａ) (58)調査した分野(Int.Cl.6，ＤＢ名) B60M 3/00 ────────────────────────────────────────────────── ─── Continuation of the front page (56) References JP-A-1-78941 (JP, A) JP-A-2-77338 (JP, A) (58) Fields investigated (Int.Cl. 6 , DB name) B60M 3/00
Claims (1)
される第１リードと、レール側に接続される第２リード
との間に、第１パルス発生用コンデンサを接続する一
方、この第１パルス発生用コンデンサと並列に第１パル
ス発生用放電管と第２パルス発生用コンデンサの直列接
続されたものを接続し、また第２パルス発生用コンデン
サと並列に第２パルス発生用放電管とドライバ、例えば
リレー、フォトカプラの直列接続されたものを接続、さ
らに第１パルス発生用コンデンサと並列にドライバの接
点を介して抵抗を接続すると共に、第２パルス発生用放
電管の作動による通電状態を検出する通電検出手段を設
けるというサージ抑制機能を有し、かつ放電管を利用す
ることを特徴とし、さらには地絡故障の検出と同時に第
１、第２パルス発生用放電管の作動が停止することを特
徴とする直流電圧検出器。1. A first pulse generating capacitor is connected between a first lead connected to a metal body such as a bridge or a train line support beam and a second lead connected to a rail. A first pulse generation discharge tube and a second pulse generation capacitor connected in series are connected in parallel with the first pulse generation capacitor, and a second pulse generation discharge tube is connected in parallel with the second pulse generation capacitor. And a driver, for example, a relay and a photocoupler connected in series, a resistor is connected in parallel with the first pulse generating capacitor through a contact of the driver, and the second pulse generating discharge tube is energized. It has a surge suppression function of providing an energization detecting means for detecting a state and uses a discharge tube. Further, the first and second pulses are generated simultaneously with the detection of a ground fault. DC voltage detector operating the discharge tube, characterized in that the stop.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8661290A JP2920189B2 (en) | 1990-03-30 | 1990-03-30 | DC voltage detector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8661290A JP2920189B2 (en) | 1990-03-30 | 1990-03-30 | DC voltage detector |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH03284431A JPH03284431A (en) | 1991-12-16 |
| JP2920189B2 true JP2920189B2 (en) | 1999-07-19 |
Family
ID=13891841
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP8661290A Expired - Lifetime JP2920189B2 (en) | 1990-03-30 | 1990-03-30 | DC voltage detector |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2920189B2 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5665560B2 (en) * | 2011-01-19 | 2015-02-04 | 東日本旅客鉄道株式会社 | Protection system for feeding equipment, detection device, and protection method |
| JP7245127B2 (en) * | 2019-07-03 | 2023-03-23 | 東日本旅客鉄道株式会社 | earth fault protector |
-
1990
- 1990-03-30 JP JP8661290A patent/JP2920189B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH03284431A (en) | 1991-12-16 |
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