JPS61214716A - Regular monitoring - Google Patents
Regular monitoringInfo
- Publication number
- JPS61214716A JPS61214716A JP60052299A JP5229985A JPS61214716A JP S61214716 A JPS61214716 A JP S61214716A JP 60052299 A JP60052299 A JP 60052299A JP 5229985 A JP5229985 A JP 5229985A JP S61214716 A JPS61214716 A JP S61214716A
- Authority
- JP
- Japan
- Prior art keywords
- signal
- signals
- abnormality
- constant monitoring
- regular monitoring
- 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.)
- Pending
Links
Landscapes
- Emergency Protection Circuit Devices (AREA)
Abstract
(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.
Description
【発明の詳細な説明】
〔発明の利用分野〕
本発明は電流情報をＦＭ信号によって相手端と送受信す
る保護継電装置の常時監視方法に係り、待時に、装置の
断線・接触不良モードを監視するのに好適な常時監視方
法に関する。[Detailed Description of the Invention] [Field of Application of the Invention] The present invention relates to a method for constantly monitoring a protective relay device that transmits and receives current information to and from a counterpart end using an FM signal, and monitors disconnection and poor contact modes of the device during standby. The present invention relates to a constant monitoring method suitable for
電力系統の電流を相手端とＦＭ信号によって送受信し、
キルヒホッフの法則によって動作判定を行なう保護継電
装置における常時監視方式としては、例えば、特開昭５
０−８２９２２号公報のように、装置内部のＦＭ信号を
電圧信号に変換し、この信号レベルの大きさによって装
置の異常を発見する方式であったので、異常発見時信号
そのものが異常となったのか、装置の送受信回路が異常
となったのか判別がつかない欠点があった。Transmits and receives current from the power system to the other end using FM signals,
For example, as a constant monitoring method for a protective relay device that determines operation based on Kirchhoff's law,
As in Publication No. 0-82922, the FM signal inside the device was converted into a voltage signal, and an abnormality in the device was detected based on the magnitude of this signal level, so when an abnormality was detected, the signal itself became abnormal. The problem was that it was difficult to determine whether the device's transmitting/receiving circuit was abnormal.
図中、１は保護継電装置の端子台、または、コネクタを
示す、つまり、地盤の通信装置（通常は°１搬送端局装
置を示す）とのインターフェイス部分である。２はＵリ
ンクであり、ＦＭ信号のレベルチェックを行なうための
チェック端子である。３はインピーダンスマツチングお
よび絶縁をとるためのマツチングトランスである。４は
ＦＭ信号を減衰させるアッテネータであり、５はＦＭ信
号を電圧信号に変換するＦＶ回路である。尚、ＦＶ回路
によって電圧信号に変換された信号レベルを常時監視し
ている。このため、信号断等の異常が発見できていた。In the figure, numeral 1 indicates a terminal block or a connector of the protective relay device, that is, an interface portion with a ground communication device (usually indicates a °1 carrier end station device). 2 is a U link, which is a check terminal for checking the level of the FM signal. 3 is a matching transformer for impedance matching and insulation. 4 is an attenuator that attenuates the FM signal, and 5 is an FV circuit that converts the FM signal into a voltage signal. Note that the signal level converted into a voltage signal by the FV circuit is constantly monitored. For this reason, abnormalities such as signal interruptions could be detected.
しかし、図に示す工ないし５の構成要素では、マイクロ
波回線の異常によるＦＭ信号の断であるのか、通信装置
の異常によるＦＭ信号の断であるのか、保護継電装置の
ＦＭ信号送受部回路の異常によるＦＭ信号の断であるの
かが判別できず、異常現象の調査・検討が著しく困難と
なるという欠点があった。However, in the components 5 to 5 shown in the figure, whether the FM signal is disconnected due to an abnormality in the microwave line or the FM signal is disconnected due to an abnormality in the communication device, the FM signal transmitting/receiving circuit of the protective relay device It is not possible to determine whether the FM signal is cut off due to an abnormality, which makes it extremely difficult to investigate and study abnormal phenomena.
本発明の目的は、ＦＭ信号を利用して保護を行なう継電
装置において、ＦＭ信号の送受信回路の異常を発見でき
る常時監視方法を提供することにある。SUMMARY OF THE INVENTION An object of the present invention is to provide a constant monitoring method that can detect abnormalities in an FM signal transmitting/receiving circuit in a relay device that performs protection using FM signals.
本発明の要点は、保護継電装置内部の二つの点のＦＭ信
号そのものの差を常時監視し、装置内部での断線・接触
不良を判定することにある。The gist of the present invention is to constantly monitor the difference between the FM signals themselves at two points inside the protective relay device, and to determine whether there is a disconnection or poor contact inside the device.
Ｒ１−Ｒ４からなる抵抗およびオペアンプ６からなるＦ
Ｍ信号の差を合成する回路によって、端子台１とマツチ
ングトランス３の間のＦＭ信号の断を検出することがで
きる。尚、端子台１のＦＭ信号をＶｔ（ｔ）−マツチン
グトランスでのＦＭ信号をｖ２（ｔ）常時監視回路への
出力をＶａ（ｔ）とすると、
たとえば、
Ｒ１＝Ｒ，・・・（２）
Ｒ２＋Ｒ，＝Ｒ１＋Ｒ４・・・（３）
なる関係を保つようにＲ□〜Ｒ４を選定すれば、ｖｏ
（ｔ）＝ｖ、（ｔ）−Ｖｌ （ｔ）となり、平常時は、
Ｖｌ（ｔ ） ＝Ｖｚ （ｔ）よりＶ、 （ｔ） ＝
０
また、端子台１とマツチングトランス３の間に断線・接
触不良の異常がある場合。F consisting of a resistor consisting of R1-R4 and an operational amplifier 6
Discontinuation of the FM signal between the terminal block 1 and the matching transformer 3 can be detected by a circuit that synthesizes the difference between the M signals. In addition, if the FM signal of the terminal block 1 is Vt(t), the FM signal of the matching transformer is v2(t), and the output to the constant monitoring circuit is Va(t), then, for example, R1=R,...( 2) R2+R,=R1+R4...(3) If R□~R4 are selected to maintain the following relationship, vo
(t)=v, (t)-Vl (t), and under normal conditions,
Vl (t) = Vz (t) from V, (t) =
0 Also, if there is an abnormality such as disconnection or poor contact between the terminal block 1 and the matching transformer 3.
Ｖｔ（ｔ）≠ｖ、 （ｔ） ＝０
より、Ｖ、（ｔ）≧０
なる関係が成立する０以上の付加した常時監視回路によ
って、異常部分の判定が簡単となる。Since Vt(t)≠v, (t) = 0, the abnormal portion can be easily determined by adding 0 or more constant monitoring circuits that satisfy the relationship: V, (t)≧0.
図は本発明の一実施例の系統図、である。 ６・・・オペアンプ。 The figure is a system diagram of an embodiment of the present invention. 6... operational amplifier.
Claims (1)
よつて送受信し、この信号の総和によつて動作判定を行
なう保護継電方法において、 装置内部での前記ＦＭ信号の波形の差を検出することに
よつて装置の断線・接触不良を検出することを特徴とす
る常時監視方法。[Scope of Claims] 1. In a protective relaying method in which the current of the power system is determined, the current is transmitted and received with the other end using an FM signal, and the operation is determined based on the sum of the signals, the above-mentioned inside the device A constant monitoring method characterized by detecting a disconnection or poor contact of a device by detecting a difference in waveforms of FM signals.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP60052299A JPS61214716A (en) | 1985-03-18 | 1985-03-18 | Regular monitoring |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP60052299A JPS61214716A (en) | 1985-03-18 | 1985-03-18 | Regular monitoring |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS61214716A true JPS61214716A (en) | 1986-09-24 |
Family
ID=12910913
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP60052299A Pending JPS61214716A (en) | 1985-03-18 | 1985-03-18 | Regular monitoring |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS61214716A (en) |
-
1985
- 1985-03-18 JP JP60052299A patent/JPS61214716A/en active Pending
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