JP2751520B2 - Voltage sensor - Google Patents
Voltage sensorInfo
- Publication number
- JP2751520B2 JP2751520B2 JP2018307A JP1830790A JP2751520B2 JP 2751520 B2 JP2751520 B2 JP 2751520B2 JP 2018307 A JP2018307 A JP 2018307A JP 1830790 A JP1830790 A JP 1830790A JP 2751520 B2 JP2751520 B2 JP 2751520B2
- Authority
- JP
- Japan
- Prior art keywords
- voltage
- phase
- voltage sensor
- ground
- capacitor
- 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
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 この発明は、配電状態モニタリングセンサ使用におけ
る対地間浮遊容量の不安定性と汚損による抵抗成分の発
生による影響を簡単な方法で最小限にできる電圧センサ
に関する。Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a voltage sensor capable of minimizing the influence of the generation of a resistance component due to the instability of a floating capacitance to ground and the fouling in the use of a power distribution monitoring sensor in a simple manner. .
従来の技術 従来の電圧センサは、第３図に示すように三相開閉器
の各相充電部５に外側電極と内側電極からなる分圧器６
を設置し、その各分圧器の出力電圧（分圧）をそれぞれ
電圧センサで直接測定することにより、間接的ではある
が非接触で高圧導電体の電圧を検出するものである。な
お、１は三相開閉器、２は三相高圧配線である。2. Description of the Related Art As shown in FIG. 3, a conventional voltage sensor includes a voltage divider 6 including an outer electrode and an inner electrode in each phase charging section 5 of a three-phase switch.
Is installed, and the voltage of the high-voltage conductor is detected indirectly but non-contactly by directly measuring the output voltage (divided voltage) of each voltage divider with a voltage sensor. 1 is a three-phase switch, and 2 is a three-phase high-voltage wiring.
発明が解決しようとする課題 上記従来の方法では、気象の変化（例えば雨、雪な
ど）により開閉器充電部の対地間浮遊容量が変化した
り、ガイシの汚損により対地間抵抗成分が発生するた
め、三相各相の電圧出力値のバランスがくずれ事故等の
誤判断を起こし得る。この発明は、従来のものがもつ上
記のような課題を解決させ、簡易かつ信頼性の高い方法
で精度よく電圧を検出する電圧センサを提供することを
目的とする。Problems to be Solved by the Invention In the above-mentioned conventional method, a change in the weather (for example, rain, snow, etc.) causes a change in the floating capacity between the ground of the switch charging unit and a resistance component between the ground due to contamination of the insulator. In addition, the voltage output values of the three phases may be out of balance, resulting in an erroneous determination such as an accident. SUMMARY OF THE INVENTION It is an object of the present invention to solve the above-mentioned problems of the conventional device and to provide a voltage sensor that detects a voltage accurately by a simple and reliable method.
課題を解決するための手段 この発明、従来のものの各相の分圧器の外側電極をガ
イシ等の高インピーダンスな物質で絶縁保護されたコン
デンサで各相間を互いに接続することを特徴とする。Means for Solving the Problems The present invention is characterized in that the external electrodes of the voltage divider of each phase are connected to each other with a capacitor insulated and protected by a high-impedance material such as a insulator.
作用 上記構成においては、気象の変化（雨、雪など）によ
る対地間浮遊容量の変化およびガイシ汚損による対地間
抵抗成分の発生に起因する三相各相の電圧センサ出力値
のバラツキを補正することができ、零相電圧の誤差も最
小限にできるので事故の誤判断がなくなる。In the above configuration, it is possible to correct the variation of the output value of the voltage sensor of each of the three phases due to the change in the stray capacitance between the ground due to a change in weather (rain, snow, etc.) and the resistance component between the ground due to contamination of the insulator. And the error of the zero-sequence voltage can be minimized, so that an erroneous judgment of an accident is eliminated.
実施例 この発明の実施例を第１図を参照しながら説明する。
なお、第３図と共通する素子には同一番号を付してい
る。第１図において、三相開閉器１の各相充電部５に分
圧器６を設置した従来型電圧センサに、その各相の分圧
器の外側電極を高インピーダンスなガイシ３等で絶縁保
護されたコンデンサ８で電気的に接続した構成をとる。
そして、充電部５および電圧センサ４と分圧器６は汚損
を避けるためポリエチレン製のカバー７で保護されてい
る。また、ここで使用されているガイシ３は表面汚損
時、高電圧による短絡が発生しないように沿面距離の大
きなものを使用する。Embodiment An embodiment of the present invention will be described with reference to FIG.
Elements common to FIG. 3 are given the same numbers. In FIG. 1, in a conventional voltage sensor in which a voltage divider 6 is installed in each phase charging section 5 of the three-phase switch 1, an outer electrode of the voltage divider of each phase is insulated and protected by a high impedance insulator 3 or the like. The configuration is such that the capacitors 8 are electrically connected.
The charging section 5, the voltage sensor 4, and the voltage divider 6 are protected by a polyethylene cover 7 to avoid contamination. The insulator 3 used here has a large creepage distance so that a short circuit due to a high voltage does not occur when the surface is soiled.
さて、第２図に本実施例の等価回路を示す。ここで、
（ａ）図は相間コンデンサのΔ結線表示で中心が接地点
で各端点が各相充電部にあたり、分圧器６と電圧センサ
単体は並列に、大地間浮遊容量とは直列に、そして相間
コンデンサC2がΔ型に接続されている。FIG. 2 shows an equivalent circuit of this embodiment. here,
(A) The figure shows the Δ connection of the inter-phase capacitor, with the center at the ground point and each end point at each phase charging unit, the voltage divider 6 and the voltage sensor alone in parallel, the ground stray capacitance in series, and the inter-phase capacitor C 2 are connected in a Δ type.
次に、Δ結線の相間コンデンサをΔ−Ｙ変換により等
価的にＹ結線表示すると（ｂ）図のように相間コンデン
サの静電容量の３倍のコンデサが大地間浮遊容量に並列
に接続されるのと等価となる。また、第１図におけるガ
イシ３が雨等で汚損された場合には、第２図（ｂ）のよ
うに対値間浮遊容量Ca,Cb,C0に並列に可変抵抗Ｒが接続
されるのと等価となる。ここでＲを10+6［Ω］（注水
時）から無限大まで変化させることにより正常時から各
種の汚損時にかけての模擬ができる。ところで、ａ相電
圧をａとおくと電圧センサに印加される電圧ｓは次
式で表現される。Next, when the Δ-connected inter-phase capacitors are equivalently Y-connected by Δ-Y conversion, a capacitor three times the capacitance of the inter-phase capacitors is connected in parallel to the stray capacitance between the grounds as shown in FIG. Is equivalent to When the insulator 3 in FIG. 1 is contaminated by rain or the like, a variable resistor R is connected in parallel to the stray capacitances C a , C b , and C 0 between pairs as shown in FIG. It is equivalent to Here, by changing R from 10 +6 [Ω] (at the time of water injection) to infinity, it is possible to simulate from normal time to various kinds of contamination. By the way, if the a-phase voltage is a, the voltage s applied to the voltage sensor is expressed by the following equation.
ただし、Ｗ＝２π×ｆ（f:周波数）である。 Here, W = 2π × f (f: frequency).
次式において、Ｒは通常10+6［Ω］よりも大きいので
3C2を対地間浮遊容量Caが無視できるほど大きくとる
と、ｓはCa,Rによるずある一定位相かつ一定値をもっ
た値に収束する。また、ｂ相およびｃ相についても同様
である。従って、３相各相間にある値のコンデンサをΔ
結線することにより、気象の変化による対地間浮遊容量
の変化および雨等によるガイシ３の汚損表面抵抗成分
（対地間抵抗成分）の発生が引き起こす電圧センサの出
力電圧の不安定性を最小限にすることかできる。そし
て、三相各相の電圧センサの出力値も安定すると、零相
電圧の検出も正確にできる。In the following equation, R is usually larger than 10 +6 [Ω].
If 3C 2 is set to be so large that the ground-to-ground stray capacitance Ca is negligible, s converges to a value having a certain constant phase and a certain value due to C a and R. The same applies to the b phase and the c phase. Therefore, the value of the capacitor between the three phases is Δ
The connection minimizes the instability of the output voltage of the voltage sensor caused by the change in the stray capacitance between the ground due to the change of weather and the generation of the surface resistance component (resistance between the ground) of the insulator 3 due to rain or the like. I can do it. When the output values of the voltage sensors of the three phases are stabilized, the zero-phase voltage can be detected accurately.
発明の効果 以上のように、本発明は三相各相間にある値のコンデ
ンサをΔ型に結線することにより、気象の変化（雨、雪
など）による対地間浮遊容量の変化およびガイシ汚損に
よる対地間抵抗成分の発生に起因する三相各相の電圧セ
ンサ出力値のバラツキを補正することができ、零相電圧
の誤差も最小限にできるので事故の誤判断が少なくな
る。Effect of the Invention As described above, the present invention connects a capacitor having a value between each of the three phases in a Δ-shape to change the floating capacity between the ground due to a change in weather (rain, snow, etc.) and the ground due to soiling of insulators. Variations in the voltage sensor output values of each of the three phases due to the generation of the inter-resistance component can be corrected, and errors in the zero-phase voltage can be minimized, thereby reducing erroneous determination of an accident.
第１図は本発明の一実施例における電圧センサの概要
図、第２図は同実施例における電圧センサの三相高圧開
閉器に取り付け時の等価回路図、第３図は従来例の電圧
センサの概要図である。 １……三相開閉器（アース体）、２……三相高圧配電
線、３……ガイシ、４……電圧センサ単体、５……三相
開閉器充電部、６……分圧器、７……充電部カバー、８
……相間コンデンサ。FIG. 1 is a schematic view of a voltage sensor according to an embodiment of the present invention, FIG. 2 is an equivalent circuit diagram when the voltage sensor according to the embodiment is mounted on a three-phase high-voltage switch, and FIG. 3 is a conventional voltage sensor. FIG. DESCRIPTION OF SYMBOLS 1 ... three-phase switch (grounding body), 2 ... three-phase high voltage distribution line, 3 ... insulator, 4 ... single voltage sensor, 5 ... three-phase switch charging part, 6 ... voltage divider, 7 …… Charging part cover, 8
…… Capacitor between phases.
Claims (1)
分圧器の外側電極間にコンデンサを各々接続し、前記コ
ンデンサの容量を対地間浮遊容量が無視できるほど大き
く調節することにより、対地間浮遊容量の不安定性を補
償することを特徴とする電圧センサ。1. A capacitor is connected between the outer electrodes of a voltage divider of a voltage sensor installed in each phase of a three-phase conductor, and the capacitance of the capacitor is adjusted to be so large that the stray capacitance between the ground and the ground is negligible. A voltage sensor for compensating for instability of stray capacitance to ground.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2018307A JP2751520B2 (en) | 1990-01-29 | 1990-01-29 | Voltage sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2018307A JP2751520B2 (en) | 1990-01-29 | 1990-01-29 | Voltage sensor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH03221872A JPH03221872A (en) | 1991-09-30 |
| JP2751520B2 true JP2751520B2 (en) | 1998-05-18 |
Family
ID=11967958
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2018307A Expired - Fee Related JP2751520B2 (en) | 1990-01-29 | 1990-01-29 | Voltage sensor |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2751520B2 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5333706A (en) * | 1991-10-22 | 1994-08-02 | Akebono Brake Industry Co., Ltd. | Brake apparatus for a vehicle |
| CN110221132A (en) * | 2019-06-18 | 2019-09-10 | 国网冀北电力有限公司廊坊供电公司 | The method and nuclear phase instrument new application of electrification investigation high-tension apparatus phase shortage |
-
1990
- 1990-01-29 JP JP2018307A patent/JP2751520B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH03221872A (en) | 1991-09-30 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |