JP2656071B2 - Voltage detector - Google Patents
Voltage detectorInfo
- Publication number
- JP2656071B2 JP2656071B2 JP63124359A JP12435988A JP2656071B2 JP 2656071 B2 JP2656071 B2 JP 2656071B2 JP 63124359 A JP63124359 A JP 63124359A JP 12435988 A JP12435988 A JP 12435988A JP 2656071 B2 JP2656071 B2 JP 2656071B2
- Authority
- JP
- Japan
- Prior art keywords
- voltage
- electrode
- wire conductor
- optical
- voltage sensor
- 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 - Fee Related
Links
- 239000004020 conductor Substances 0.000 claims description 33
- 230000003287 optical effect Effects 0.000 claims description 25
- 239000013307 optical fiber Substances 0.000 claims description 5
- 239000003990 capacitor Substances 0.000 description 13
- 239000000835 fiber Substances 0.000 description 9
- 238000010586 diagram Methods 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 230000005697 Pockels effect Effects 0.000 description 1
- 230000004888 barrier function Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
Landscapes
- Measuring Instrument Details And Bridges, And Automatic Balancing Devices (AREA)
Description
【発明の詳細な説明】 産業上の利用分野 本発明は、電線導体部に印加されている電圧を検出す
るための電圧検出器に関するものである。Description: TECHNICAL FIELD The present invention relates to a voltage detector for detecting a voltage applied to a wire conductor.
従来の技術 先に、本発明者らは、電線導体部を軸として周囲を囲
むようにして設けた第１の誘電体部と、上記第１の誘電
体部の外周に設けた第１の電極と、上記第１の電極を囲
むようにして設けた第２の誘電体部と、上記第２の誘電
体部の外周に設けた第２の電極を有し、上記第１の電極
及び上記第２の電極から二次電圧をとり出すことを特徴
とする分圧器を提案した。Prior art First, the present inventors have provided a first dielectric portion provided around the wire conductor portion as an axis, a first electrode provided on the outer periphery of the first dielectric portion, A second dielectric portion provided so as to surround the first electrode; and a second electrode provided on an outer periphery of the second dielectric portion. A voltage divider characterized by taking out the secondary voltage was proposed.
上述の分圧器は、とり出した二次電圧を光電圧センサ
で検出するもので、高圧架空配電線用，低圧架空配電線
用，屋内配線用等に好適であり、配電線においては、供
給電圧値の管理，負荷状態の監視，事故の検出等の目的
に有効であることは言うまでもないことである。The above-mentioned voltage divider detects the extracted secondary voltage with an optical voltage sensor, and is suitable for a high-voltage overhead distribution line, a low-voltage overhead distribution line, indoor wiring, and the like. Needless to say, it is effective for the purpose of value management, monitoring of load condition, detection of accidents, and the like.
第３図に前回提案した分圧器の斜視図を示す。第３図
において、１は電線導体部、２は上記電線導体部１の周
囲に設けた第１誘電体部、３は上記第１誘電体部２の外
周に設けた第１の電極、４は上記第１の電極３と光電圧
センサの第１の入力端子とを電気的に接続するための第
１の端子、５は上記第１の電極３を囲むようにして設け
た第２の誘電体部、６は上記第２の誘電体部の外周に設
けた第２の電極、７は上記第２の電極６と光電圧センサ
の第２の入力端子とを電気的に接続するための第２の端
子である。FIG. 3 shows a perspective view of the previously proposed voltage divider. In FIG. 3, 1 is a wire conductor, 2 is a first dielectric portion provided around the wire conductor 1, 3 is a first electrode provided on the outer periphery of the first dielectric portion 2, and 4 is a first electrode. A first terminal 5 for electrically connecting the first electrode 3 to a first input terminal of the optical voltage sensor; a second dielectric portion 5 surrounding the first electrode 3; Reference numeral 6 denotes a second electrode provided on the outer periphery of the second dielectric portion, and reference numeral 7 denotes a second terminal for electrically connecting the second electrode 6 to a second input terminal of the optical voltage sensor. It is.
以下、この分圧器の動作について説明する。まず、上
記電線導体部１と上記第１の電極３は、上記第１の誘電
体部２を介在することにより、静電容量C1の第１のコン
デンサを構成する。次に、上記第１の電極３と上記第２
の電極６と上記第２の誘電体部５で静電容量C2の第２の
コンデンサを構成する。また、上記第２の電極６と大地
間の浮遊容量により静電容量C3の第３のコンデンサが構
成される。Hereinafter, the operation of the voltage divider will be described. First, the wire conductor portion 1 and the first electrode 3, by interposing the first dielectric portion 2, constituting the first capacitor of the capacitance C 1. Next, the first electrode 3 and the second
Constituting the second capacitor of the capacitance C 2 in the electrode 6 and the second dielectric part 5. The third capacitor of the capacitance C 3 is constituted by the stray capacitance between the second electrode 6 and ground.
以上の各コンデンサの接続関係を第４図に等価回路で
示した。第４図において、11は第１のコンデンサ、12
は、第２のコンデンサ、13は第３のコンデンサ、14は大
地、15は上記電線導体部１と大地間に接続されている電
源、16は光電圧センサに接続するための第１の電極、17
は同じく光電圧センサに接続するための第２の電極であ
る。上記電源15の電源電圧をVHとすると、上記第１の電
極16、上記第２の電極17間に出力される二次電圧Voutは
次式で表すことができる。FIG. 4 shows an equivalent circuit of the connection relationship of each capacitor described above. In FIG. 4, 11 is the first capacitor, 12
Is a second capacitor, 13 is a third capacitor, 14 is ground, 15 is a power supply connected between the wire conductor 1 and ground, 16 is a first electrode for connecting to the optical voltage sensor, 17
Is a second electrode for connecting to the optical voltage sensor. Assuming that the power supply voltage of the power supply 15 is V H , the secondary voltage V out output between the first electrode 16 and the second electrode 17 can be expressed by the following equation.
以上のように、各静電容量C1,C2,C3を適当に選ぶこと
により任意の二次電圧をとり出すことができることとな
る。 As described above, an arbitrary secondary voltage can be extracted by appropriately selecting the capacitances C 1 , C 2 , and C 3 .
発明が解決しようとする課題 以上のような従来の構成では、二次電圧をとり出すた
め、同軸に二重して設けた２つの電極板を用いているの
で、分圧器の形状が太くなる上、分圧比を決定する浮遊
容量値等の設計パラメータが多く、長期的に安定な性能
を維持するためには、分圧器を構成する電極板や誘電体
部の機械的精度や電気性能の精度確保で必要であり、低
価格化実現の障壁となるおそれを有していた。Problems to be Solved by the Invention In the conventional configuration as described above, since two electrode plates are provided coaxially and doublely in order to extract a secondary voltage, the shape of the voltage divider becomes thicker. There are many design parameters such as stray capacitance values that determine the voltage division ratio, and in order to maintain stable performance over the long term, the accuracy of the mechanical and electrical performance of the electrode plates and dielectric parts that compose the voltage divider must be ensured. And there is a risk that it may become a barrier to realizing a low price.
課題を解決するための手段 この問題点を解決するために本発明は、電線導体部を
軸として周囲を囲むようにして設けた誘電体部と、上記
誘電体部を介し上記電線導体部に対向して設けた電極板
とを有し、上記電線導体部と上記電極板とから各々導体
で光電圧センサに接続し、上記光電圧センサに光ファイ
バを接続し、外部にある光源及び光電変換器と接続する
ようにしたものである。Means for Solving the Problems In order to solve this problem, the present invention provides a dielectric portion provided so as to surround the periphery with the electric wire conductor portion as an axis, and facing the electric wire conductor portion via the dielectric portion. An electrode plate provided, connected to an optical voltage sensor by a conductor from each of the electric wire conductor portion and the electrode plate, connected to an optical fiber to the optical voltage sensor, and connected to an external light source and a photoelectric converter. It is something to do.
作用 この構成により、電線導体部，電極板，大地で構成さ
れる主として２つの静電容量により電線導体部と大地間
に印加される電源電圧を分圧し、この分圧出力を光電圧
センサに印加することにより、電源電圧を検知するもの
である。Operation With this configuration, the power supply voltage applied between the wire conductor and the ground is divided mainly by two capacitances composed of the wire conductor, the electrode plate, and the ground, and the divided output is applied to the optical voltage sensor. By doing so, the power supply voltage is detected.
実施例 以下、本発明の一実施例について図面を参照しながら
説明する。第１図は本発明の一実施例による電圧検出器
の斜視図であり、第１図において、21は電線導体部、22
は上記電線導体部21を軸として周囲を囲むようにして設
けた誘電体部、23は上記誘電体部22を介し上記電線導体
部21に対向して設けた電極板、24は上記電線導体部21か
ら電気的導通をとるための金具、25は上記電極板23から
電気的導通をとるための電極端子、26はポッケルス効果
等を応用した光電圧センサで、この光電圧センサ26に設
けた一対の電圧印加端子27,28を介して各々上記金具24
と上記電極端子25と電気的に接続されている。29は送光
ファイバで、一端は上記光電圧センサ26に、他端は光源
30に接続されている。31は受光ファイバで、一端は上記
電圧センサ26に、他端は受光部32に接続されている。Embodiment Hereinafter, an embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a perspective view of a voltage detector according to an embodiment of the present invention. In FIG.
Is a dielectric portion provided so as to surround the periphery with the electric wire conductor portion 21 as an axis, 23 is an electrode plate provided opposite to the electric wire conductor portion 21 through the dielectric portion 22, and 24 is from the electric wire conductor portion 21. A metal fitting for establishing electrical continuity, 25 is an electrode terminal for establishing electrical continuity from the electrode plate 23, 26 is an optical voltage sensor applying the Pockels effect or the like, and a pair of voltages provided on the optical voltage sensor 26 Each of the above fittings 24
And the electrode terminal 25 are electrically connected. 29 is a light transmitting fiber, one end of which is the optical voltage sensor 26, and the other end is a light source
Connected to 30. Reference numeral 31 denotes a light receiving fiber, one end of which is connected to the voltage sensor 26 and the other end of which is connected to the light receiving section 32.
以上のように構成された電圧検出器について、以下に
その動作を説明する。第２図に第１図に示した電圧検知
器の等価回路を示す。第２図において、41は上記電線導
体部21と大地間に電圧VSを印加する電源、42は上記電線
導体部21と上記電極板23で構成される静電容量Caの第１
コンデンサ、43は上記電極板23と大地で構成される静電
容量Cbの第２のコンデンサ、44は大地、47は光電圧セン
サ、45は上記金具24による第１の接続点、46は上記電極
端子25による第２の接続点で、各々上記光電圧センサ47
の入力端子に接続されている。48は上記光電圧センサ47
に接続された上記送光ファイバ29で、他端は49に示した
光源に接続され、50は上記光電圧センサ47に接続された
上記受光ファイバ31で、他端は51に示した受光部に接続
されている。そして、上記第１のコンデンサ42から上記
第１の接続点45及び上記第２の接続点46を介して上記光
電圧センサ47に印加された二次電圧に応じて上記受光フ
ァイバ50を介して上記受光部51に入射する光量が変化
し、上記二次電圧を検出できることとなる。また、上記
第１のコンデンサ42の両端に発生する二次電圧Ｖ′out
は次式で表わすことができる。The operation of the voltage detector configured as described above will be described below. FIG. 2 shows an equivalent circuit of the voltage detector shown in FIG. In Figure 2, 41 is a power supply for applying a voltage V S across the wire conductor portion 21 and the earth, 42 the first capacitance C a configured by the wire conductor portion 21 and the electrode plate 23
Capacitor 43 and the second capacitor of the capacitance C b consists of earth and the electrode plate 23, the earth 44, the optical voltage sensor 47, 45 is a first connection point by the bracket 24, 46 is the At the second connection point by the electrode terminal 25, each of the optical voltage sensors 47
Is connected to the input terminal of 48 is the above optical voltage sensor 47
The other end is connected to the light source shown in 49, the other end is connected to the light receiving fiber 31 connected to the optical voltage sensor 47, and the other end is connected to the light receiving section shown in 51. It is connected. Then, the first capacitor 42 is connected to the optical voltage sensor 47 via the first connection point 45 and the second connection point 46 via the first connection point 45 and the second connection point 46. The amount of light incident on the light receiving unit 51 changes, and the secondary voltage can be detected. The secondary voltage generated across the first capacitor 42 V 'out
Can be expressed by the following equation.
以上のように本実施例によれば、電線導体部を軸とし
て周囲を囲むようにして設けた誘電体部と、上記誘電体
部を介し上記電線導体部に対向して設けた電極板とを有
し、上記電線導体部と上記電極板とから各々導体で光電
圧センサに接続し、上記光電圧センサに光ファイバを接
続し、外部にある光源及び光電変換器と接続することに
より、構成が簡単で、形状の小さい電圧検出器が実現で
きる。 As described above, according to the present embodiment, it has a dielectric portion provided so as to surround the periphery with the electric wire conductor portion as an axis, and an electrode plate provided opposite to the electric wire conductor portion via the dielectric portion. By connecting the optical conductor to the optical voltage sensor with a conductor from each of the electric wire conductor and the electrode plate, connecting the optical fiber to the optical voltage sensor, and connecting to an external light source and a photoelectric converter, the configuration is simple. A voltage detector having a small shape can be realized.
なお、本実施例においては、送光ファイバと受光ファ
イバを別々としたが、１本の光ファイバで送光、受光を
兼ねても良いことは言うまでもない。In the present embodiment, the light transmitting fiber and the light receiving fiber are separated, but it goes without saying that one optical fiber may be used for both light transmitting and light receiving.
発明の効果 以上のように本発明によれば、電線導体部を軸として
周囲を囲むようにして設けた誘電体部と、上記誘電体部
を介し上記電線導体部に対向して設けた電極板とを有
し、上記電線導体部と上記電極板とから各々導体で光電
圧センサに接続し、上記光電圧センサに光ファイバを接
続し、外部にある光源及び光電変換器と接続することに
より、構成が簡単で、上記第（１）式と第（２）式を比
較しても明らかなように二次電圧を設定するパラメータ
が少なくなっており、経時的な変動要素が従来より少な
いため、より動作が安定となる上、形状の小さな電圧検
出器を構成できるという効果が得られる。Effects of the Invention As described above, according to the present invention, a dielectric portion provided so as to surround the periphery with the electric wire conductor as an axis, and an electrode plate provided to face the electric wire conductor through the dielectric portion Having a conductor connected to the optical voltage sensor with a conductor from each of the wire conductor portion and the electrode plate, an optical fiber connected to the optical voltage sensor, and connected to an external light source and a photoelectric converter. As is clear from comparison of the above equations (1) and (2), the number of parameters for setting the secondary voltage is small, and the number of time-varying elements is smaller than in the past. Is stabilized, and a voltage detector having a small shape can be formed.
第１図は本発明の一実施例による電圧検出器を示す斜視
図、第２図は本発明の一実施例による電圧検出器の等価
回路を示す図、第３図は従来の電圧検出器の分圧器部分
の斜視図、第４図は従来の電圧検出器の分圧器部分の等
価回路を示す図である。 21……電線導体部、22……誘電体部、23……電極板、24
……導体（金具）、25……導体（電極端子）、26……光
電圧センサ、27,28……電圧印加端子、29……送光ファ
イバ、30……光源、31……受光ファイバ、32……受光
部、41……電源、42……第１のコンデンサ、43……第２
のコンデンサ、44……大地、45……第１の接続点、46…
…第２の接続点、47……光電圧センサ、48……送光ファ
イバ、49……光源、50……受光ファイバ、51……受光
部。FIG. 1 is a perspective view showing a voltage detector according to one embodiment of the present invention, FIG. 2 is a diagram showing an equivalent circuit of the voltage detector according to one embodiment of the present invention, and FIG. FIG. 4 is a perspective view of a voltage divider, and FIG. 4 is a diagram showing an equivalent circuit of the voltage divider of the conventional voltage detector. 21: Wire conductor, 22: Dielectric, 23: Electrode plate, 24
... conductor (metal fitting), 25 ... conductor (electrode terminal), 26 ... optical voltage sensor, 27, 28 ... voltage application terminal, 29 ... light transmitting fiber, 30 ... light source, 31 ... light receiving fiber, 32 light receiving section, 41 power supply, 42 first capacitor, 43 second
Capacitors, 44 ... ground, 45 ... first connection point, 46 ...
... second connection point, 47 ... optical voltage sensor, 48 ... light transmitting fiber, 49 ... light source, 50 ... light receiving fiber, 51 ... light receiving unit.
───────────────────────────────────────────────────── フロントページの続き (72)発明者 金山 光一 大阪府門真市大字門真1006番地 松下電 器産業株式会社内 (56)参考文献 特開 昭62−17663（ＪＰ，Ａ) ────────────────────────────────────────────────── ─── Continuing on the front page (72) Inventor Koichi Kanayama 1006 Kazuma Kadoma, Kadoma-shi, Osaka Matsushita Electric Industrial Co., Ltd. (56) References JP-A-62-17663 (JP, A)
Claims (1)
て設けた誘電体部と、上記誘電体部を介し上記電線導体
部に対向して設けた電極板とを有し、上記電線導体部と
上記電極板とから各々導体で光電圧センサに接続し、上
記光電圧センサに光ファイバを接続し、外部にある光源
及び光電変換器と接続することを特徴とする電圧検出
器。A dielectric portion provided so as to surround the periphery of the wire conductor portion as an axis, and an electrode plate provided to face the wire conductor portion with the dielectric portion interposed therebetween. A voltage detector, wherein the voltage detector is connected to the optical voltage sensor via a conductor from the electrode plate, to an optical fiber connected to the optical voltage sensor, and to an external light source and photoelectric converter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63124359A JP2656071B2 (en) | 1988-05-20 | 1988-05-20 | Voltage detector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63124359A JP2656071B2 (en) | 1988-05-20 | 1988-05-20 | Voltage detector |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH01295174A JPH01295174A (en) | 1989-11-28 |
| JP2656071B2 true JP2656071B2 (en) | 1997-09-24 |
Family
ID=14883448
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP63124359A Expired - Fee Related JP2656071B2 (en) | 1988-05-20 | 1988-05-20 | Voltage detector |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2656071B2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2004257893A (en) * | 2003-02-26 | 2004-09-16 | Mitsubishi Electric Corp | Voltage sensor |
-
1988
- 1988-05-20 JP JP63124359A patent/JP2656071B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH01295174A (en) | 1989-11-28 |
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