JPH05153728A - Large current high voltage surge reducer - Google Patents
Large current high voltage surge reducerInfo
- Publication number
- JPH05153728A JPH05153728A JP33632491A JP33632491A JPH05153728A JP H05153728 A JPH05153728 A JP H05153728A JP 33632491 A JP33632491 A JP 33632491A JP 33632491 A JP33632491 A JP 33632491A JP H05153728 A JPH05153728 A JP H05153728A
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- Prior art keywords
- surge
- current
- magnetic
- lightning
- power line
- Prior art date
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Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、送配電線路からの侵入
雷サージ電圧等により電気設備が絶縁破壊され電気故障
となるのを防止するため、送配電線路においてサージ電
圧を低減する装置に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a device for reducing a surge voltage in a power transmission and distribution line in order to prevent an electrical failure due to a dielectric breakdown of an electric facility due to a lightning surge voltage from the power transmission and distribution line. Is.
【０００２】[0002]
【従来の技術】これまで、送配電線路から侵入する雷サ
ージ、開閉サージ等のサージ電圧から変電所等の電気設
備を守る方法としては、電気設備と送配電線路との接続
部に酸化亜鉛避雷器等の避雷装置を取り付けることがよ
く知られている。2. Description of the Related Art Heretofore, as a method of protecting electrical equipment such as a substation from a surge voltage such as a lightning surge or a switching surge that enters from a power transmission and distribution line, a zinc oxide lightning arrester has been used at a connection portion between the electrical equipment and the power distribution line. It is well known to install lightning protection devices such as.
【０００３】しかしながら避雷装置は、雷サージ電圧を
大地に逃すことにより、避雷装置の周辺の設備を保護す
るだけのもので、進行波の反射波現象で他の個所におい
て、サージ電圧がはねあがる等のため電気設備全体を保
護できない。However, the lightning protection device only protects the equipment around the lightning protection device by letting the lightning surge voltage escape to the ground, and the surge voltage is reflected at other places by the reflected wave phenomenon of the traveling wave. Therefore, the entire electric equipment cannot be protected.
【０００４】特に侵入雷サージの雷波形の波頭部の立上
がりが急峻な場合など、避雷装置が設置されていても、
絶縁破壊による電気故障をひきおこすことが多い。Even when a lightning arrester is installed, especially when the rising edge of the wave head of the lightning waveform of an intruding lightning surge is steep,
It often causes electrical failure due to dielectric breakdown.
【０００５】このように、避雷装置はもともと雷サージ
をその取り付けた地点で、サージ電流の一部を大地側に
逃し、その周辺の機器を保護する目的のものであって、
サージ電圧の低減を目的とするものではない。As described above, the lightning arrester is originally intended to allow a part of the surge current to escape to the ground side at the point where the lightning surge is attached and to protect the peripheral equipment,
It is not intended to reduce surge voltage.
【０００６】これらとは別に、本発明が目的とする高電
圧・大電流の電力設備以外の分野では、例えば、通信回
路や電子回路ではサージ電圧から保護するために、コン
デンサやリアクトルを組み合わせたサージ吸収器あるい
は通称ノイズフィルタ等と称するものが知られている。
しかしながら、これまでの技術では、このような通信や
電子回路で使われているものを、高電圧・大電流のかか
る電力設備に適用することは困難であった。In addition to these, in fields other than the high-voltage / high-current power equipment targeted by the present invention, for example, in a communication circuit or an electronic circuit, a surge combining a capacitor and a reactor is provided in order to protect from surge voltage. What is called an absorber or a so-called noise filter is known.
However, it has been difficult for the conventional technology to apply what is used in such communication and electronic circuits to electric power equipment to which high voltage and large current are applied.
【０００７】まず、電子、通信回路と異なり、電力輸送
用の送配電線路では数百〜数千アンペアの大電流が流れ
るため電子、通信回路で使用されているサージフィルタ
ー等のリアクトルに相当するコイルを作ることができな
い。仮に作ったとしても電線が太いため、巨大な設備と
なり実用に供しない。First, unlike an electronic or communication circuit, a large current of several hundred to several thousand amperes flows in a power transmission and distribution line for electric power transportation, so a coil corresponding to a reactor such as a surge filter used in an electronic or communication circuit. Can't make Even if it is made, the electric wire is thick, so it will be a huge facility and will not be put to practical use.
【０００８】それを解決する手段の一つとしてフェライ
ト・コアを電力線に直接取り付ける方法が考えられてい
るが通信回路と異なりサージ電流があまりにも大きすぎ
るためフェライト・コアが磁気飽和を生じるため目的を
達せないかあるいは効果が少ない。As one of means for solving the problem, a method of directly attaching the ferrite core to the power line is considered, but unlike the communication circuit, the surge current is too large and the ferrite core causes magnetic saturation, so that the purpose is Not reachable or less effective.
【０００９】以上の理由から、従来より電力設備ではサ
ージ電圧から電気設備を守るために、フェライト・コア
を直接電力線に取り付けてもサージ低減効果は少ないの
が現状であった。For the above reasons, in the conventional power equipment, the surge reduction effect is small even if the ferrite core is directly attached to the power line in order to protect the electric equipment from the surge voltage.
【００１０】[0010]
【発明が解決しようとする課題】本発明は避雷装置のよ
うに、サージ電流を大地に流し、サージ電圧を低下させ
ようとするものではなく、送配電線路において、雷サー
ジ等のサージ電圧そのものを低減しようとするものであ
る。The present invention is not intended to reduce the surge voltage by causing a surge current to flow to the ground like a lightning arrester, but to prevent the surge voltage itself such as a lightning surge in a transmission and distribution line. It is to reduce.
【００１１】電気設備へ接続された送配電線路へ、本発
明の装置を取り付けることにより、雷サージを熱エネル
ギーに変え、雷サージの波頭部の高電圧を低減するもの
であって、電気設備への侵入雷サージそのものを低減し
ようとするものである。By attaching the device of the present invention to a power transmission / distribution line connected to electric equipment, lightning surge is converted into thermal energy and high voltage at the wave head of lightning surge is reduced. It is intended to reduce the intrusion lightning surge itself.
【００１２】しかも、避雷装置のように、電気設備内で
サージの反射その他を考慮することなしに、雷サージ電
圧を、あらかじめ送配電線路で低減することにより、電
気設備の絶縁破壊を防止し、電気故障の防止をはかるこ
とを課題とするものである。Moreover, like the lightning protection device, the lightning surge voltage is reduced in advance by the power transmission and distribution line without considering the reflection of surge in the electric equipment and the like, thereby preventing the dielectric breakdown of the electric equipment, The challenge is to prevent electrical breakdown.
【００１３】また併せて、最近のように変電所がガス絶
縁開閉装置に置き換わる中で波頭峻度の高い開閉サージ
対策が問題となっているが、本発明はこのような急峻な
開閉サージを線路の途中で低減することができ、避雷装
置を省略できるものである。At the same time, countermeasures against switching surges having a high wave front steepness have become a problem in recent years when substations are replaced with gas-insulated switchgear. The lightning arrester can be omitted in the middle of the process.
【００１４】そのためには、通信回路や電子回路で用い
られているようなサージ吸収装置、あるいはサージフィ
ルターを、大電流高電圧のため、これまで不可能と考え
られていた電力設備に適用する方法が必要である。To this end, a method of applying a surge absorbing device used in a communication circuit or an electronic circuit, or a surge filter to a power facility which has been considered impossible due to a large current and a high voltage. is necessary.
【００１５】本発明は以上の点に着目してなされたもの
でこれまで不可能に近いと考えられていた大電流の電力
設備において、雷サージ電圧を低減する装置を提供しよ
うとするものである。The present invention has been made in view of the above points, and it is an object of the present invention to provide a device for reducing lightning surge voltage in a high-current power facility which has been considered to be nearly impossible. ..
【００１６】[0016]
【課題を解決するための手段】本発明はこの課題を解決
するために、フェライト・コアのような特殊な周波数帯
域のある磁性体を、取り付け器具を用いて送電線路の電
力線に直接磁性体が接するように数個所に分散して取り
付けようとするものであるが、その場合サージ電流があ
まりにも大きいと、フェライト・コア等の磁性体が磁気
飽和を生じ効果的でない。本発明はこの磁気飽和を押
え、効果的にサージ低減させるためにフェライト・コア
の一部または全周を金属性の薄膜で被覆することにより
大電流のサージを低減する装置を提供するものである。In order to solve this problem, the present invention uses a magnetic material having a special frequency band, such as a ferrite core, to directly attach the magnetic material to the power line of the transmission line by using a mounting tool. It is attempted to disperse them in several places so as to be in contact with each other, but in that case, if the surge current is too large, a magnetic substance such as a ferrite core causes magnetic saturation, which is not effective. The present invention provides a device for suppressing a large current surge by covering a part or the whole circumference of a ferrite core with a metal thin film in order to suppress the magnetic saturation and effectively reduce the surge. ..
【００１７】[0017]
【作用】この磁性体はフェライト・コア自体の周波数特
性により、５０Hzや６０Hzの商用周波には作用せずに雷
サージのような、高周波電流にのみ反応して、雷サージ
電流が流れるのを阻止する働きをする。そのため、雷サ
ージ電流の急峻な波頭部をなめらかにして、波高値を引
き下げる役割を果たす。この場合、通信回路のような微
小な電流と異なり電力線でのサージ電流は、例えば雷サ
ージ電流などでは数千アンペアと非常に大きいため、フ
ェライト・コアが磁気飽和してしまい初期の目的を達せ
ない。そこで、本発明はフェライト・コアの磁気飽和を
押えるため、フェライト・コアの円周を金属薄膜等の導
体で短絡するものである。その結果、電力線に流れた電
流で発生した磁束はフェライト・コアに磁束を発生さ
せ、その磁束により金属被覆に渦電流を生じ、その渦電
流が磁束を打ち消す方向に作用するため磁気飽和を押え
ることになる。[Function] This magnetic material does not act on the commercial frequency of 50Hz or 60Hz due to the frequency characteristics of the ferrite core itself, reacts only to high frequency current such as lightning surge, and blocks the flow of lightning surge current. To work. Therefore, the steep wave crest of the lightning surge current is smoothed, and the crest value is lowered. In this case, unlike a minute current as in a communication circuit, the surge current in the power line is as large as several thousand amperes, for example, in a lightning surge current, so that the ferrite core is magnetically saturated and the initial purpose cannot be achieved. .. Therefore, the present invention suppresses the magnetic saturation of the ferrite core, so that the circumference of the ferrite core is short-circuited by a conductor such as a metal thin film. As a result, the magnetic flux generated by the current flowing in the power line generates a magnetic flux in the ferrite core, which causes an eddy current in the metal coating, and the eddy current acts in the direction of canceling the magnetic flux to suppress magnetic saturation. become.
【００１８】[0018]
【実施例】以下添付図面に基づいて本発明の実施例に係
わる高圧サージ低減装置について詳細に説明する。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A high voltage surge reducing apparatus according to an embodiment of the present invention will be described in detail below with reference to the accompanying drawings.
【００１９】本発明の実施例に係わる高圧サージ低減装
置は、変電所等の電気所に引き込まれる送電線路の電力
線に直接設置されるものであって、送電線路への落雷等
により、送電線路の電力線から侵入してくる侵入サージ
電流の波頭峻度と波高値を低減し、もって電気所等の電
力設備を絶縁破壊故障から守るための装置である。The high voltage surge reducing apparatus according to the embodiment of the present invention is installed directly on a power line of a power transmission line that is drawn into an electric station such as a substation, and is protected from a lightning strike on the power transmission line. It is a device that reduces the wave front steepness and peak value of the inrush surge current that enters from the power line, and thus protects electric power facilities such as electric stations from dielectric breakdown failures.
【００２０】図１の１は変電所等に設置されている変圧
器等の電気設備である。電気設備１に、送配電線路の電
力線２が接続されている。今この電力線２の途中に落雷
３が発生して雷サージ電圧４が、電力線２を伝播して、
電気設備１に到達すると、絶縁破壊等を引き起こし電気
故障を発生させる。Reference numeral 1 in FIG. 1 shows electrical equipment such as a transformer installed in a substation or the like. A power line 2 of a power transmission / distribution line is connected to the electric equipment 1. Now, a lightning strike 3 occurs in the middle of the power line 2, a lightning surge voltage 4 propagates through the power line 2,
When it reaches the electric equipment 1, it causes an electric breakdown and causes an electric failure.
【００２１】本発明の装置５は、フェライト・コア等の
磁性体６と、フェライト・コアを被覆している金属薄膜
７とそれを取り付けるためのプラスチックあるいは硝子
等の取り付け器具８で構成されるものである。図２及び
図３に示すように、本発明の装置は電力線２をはさみこ
むようにしてフェライト・コア等のリング状の磁性体６
を電力線２を取り囲む状態で、両端隅部にテーパを施し
た円筒形状の取り付け器具８により固定するものであ
る。The device 5 of the present invention comprises a magnetic body 6 such as a ferrite core, a metal thin film 7 covering the ferrite core, and a mounting tool 8 such as plastic or glass for mounting the thin metal film 7. Is. As shown in FIGS. 2 and 3, the device of the present invention has a ring-shaped magnetic body 6 such as a ferrite core so as to sandwich the power line 2.
In a state of surrounding the electric power line 2, it is fixed by a cylindrical mounting tool 8 having both end corners tapered.
【００２２】磁性体であるフェライト・コア等は、よく
知られているように、その周波数特性を、材質により変
えることができる。As is well known, the frequency characteristics of the ferrite core, which is a magnetic material, can be changed depending on the material.
【００２３】本発明の装置に用いる磁性体６の周波数特
性は、雷サージ等の急峻な波頭立上がり部分に対する周
波数である数１００kHz から数メガHzの領域で磁性体と
しての働きを最も感度良くもち、商用周波の領域である
５０Hz、６０Hzでは、磁性体としての役割をしないよう
な特性を選んだものである。The frequency characteristic of the magnetic body 6 used in the apparatus of the present invention has the most sensitive function as a magnetic body in the region of several 100 kHz to several megaHz, which is the frequency for a steep wave rising portion such as lightning surge, In the commercial frequency range of 50 Hz and 60 Hz, the characteristics are selected so as not to function as a magnetic material.
【００２４】今電力線への落雷３等により、雷サージ電
流４が電力線２を伝播して、電気所１に侵入しようとす
るとき、電力線２に、本発明の装置５が取り付けてある
ため、雷サージ電流４の磁束が、磁性体６に鎖交するこ
とになる。Now, when a lightning surge current 4 propagates through the power line 2 due to a lightning strike 3 or the like on the power line and tries to enter the electric power station 1, the device 5 of the present invention is attached to the power line 2. The magnetic flux of the surge current 4 is linked to the magnetic body 6.
【００２５】この磁性体６は高周波である数百〜数メガ
Hzの部分に中心的に作用し、コアロスとして、高周波分
のみを熱エネルギーに変える働きをする。しかしなが
ら、雷サージ電流４等の電力線におけるサージ電流は通
信線と異なり電流値が非常に大きいため磁束密度が高
く、フェライト・コアで磁束飽和を生じ本来の目的を達
成しない。そのため、磁性体６の周辺に導電性の金属薄
膜を被覆する。磁性体６に生じた磁束により、この金属
薄膜に電流が流れ、この電流は磁性体６の磁束と逆方向
の磁束を生ずるため磁性体を流れる磁束を減少させ磁気
飽和を押える。雷サージ電流４のエネルギーはコアロス
として減少するだけでなく金属薄膜を流れる渦電流とし
ても消費され、効率よくサージを低減する。This magnetic material 6 has a high frequency of several hundred to several mega.
It acts mainly in the Hz part, and acts as core loss, converting only high-frequency components into heat energy. However, unlike the communication line, the surge current in the power line such as the lightning surge current 4 has a very large current value, so that the magnetic flux density is high and the magnetic flux saturation occurs in the ferrite core, and the original purpose is not achieved. Therefore, the periphery of the magnetic body 6 is coated with a conductive metal thin film. The magnetic flux generated in the magnetic body 6 causes a current to flow in the metal thin film, and this current generates a magnetic flux in the opposite direction to the magnetic flux of the magnetic body 6, so that the magnetic flux flowing in the magnetic body is reduced and magnetic saturation is suppressed. The energy of the lightning surge current 4 is not only reduced as a core loss but also consumed as an eddy current flowing through the metal thin film, and the surge is efficiently reduced.
【００２６】その結果、図４に示すように、雷サージ波
形４はこの高圧サージ低減装置５を通過すると、通過後
の雷サージ波形９のように、急峻な立上がり部分に作用
して、その波高値を引き下げる役割を果たす。この装置
の１個当りの引き下げる値はわずかであるが、電力線に
数多く備えつけることにより、大きく雷サージ電流の波
頭峻度を引き下げることになる。As a result, as shown in FIG. 4, when the lightning surge waveform 4 passes through the high-voltage surge reducing device 5, it acts on a steep rising portion like the lightning surge waveform 9 after passing, and the wave is generated. It plays the role of lowering the high price. Although the value to be reduced per device is small, the number of lightning surge currents can be greatly reduced by providing a large number of power lines.
【００２７】[0027]
【発明の効果】以上説明したように、本発明の高圧サー
ジ低減装置によれば、特別に耐電圧を必要とするブロッ
キングコイルのような装置を必要とせずに、また避雷装
置のような大がかりな設備を必要とせずに上記の簡単な
装置を電力線に取り付けるだけで、侵入サージ電流の波
高値を引き下げることができ、その結果、送電線路から
侵入する雷サージは抑制され、電気設備を絶縁破壊故障
から防護し得るという優れた技術的効果を奏するもので
ある。As described above, according to the high voltage surge reducing apparatus of the present invention, a device such as a blocking coil that requires a special withstand voltage is not required, and a large scale such as a lightning arrester is not required. By installing the above simple device on the power line without the need for equipment, the peak value of the inrush surge current can be lowered, and as a result, the lightning surge intruding from the transmission line can be suppressed and the electrical equipment can be broken down. It has an excellent technical effect of being protected from
【００２８】また、雷サージだけでなく、最近問題とな
っているガス気中開閉装置の急峻な開閉サージから機器
の侵入サージを防護するためにも使用できる。Further, it can be used not only for protecting against lightning surges but also against intruding surges of equipment from steep opening and closing surges of a gas-air switchgear which has recently been a problem.
【００２９】その他、本発明の装置は、高電圧を使用し
た部分放電試験等の測定回路へのノイズ防止回路に使用
しても効果をあらわし、現場に直ちに適用できるもので
ある。In addition, the device of the present invention is effective even when used in a noise prevention circuit for a measurement circuit such as a partial discharge test using a high voltage, and can be immediately applied to the site.
【図１】本発明の一実施例を示す概略図である。FIG. 1 is a schematic view showing an embodiment of the present invention.
【図２】本発明の要部を示す拡大図である。FIG. 2 is an enlarged view showing a main part of the present invention.
【図３】本発明の要部を示す拡大断面図である。FIG. 3 is an enlarged sectional view showing a main part of the present invention.
【図４】本発明の装置を通過する以前のサージ電流と通
過後のサージ電流の波形を比較した概略図である。FIG. 4 is a schematic diagram comparing the waveforms of the surge current before passing through and the surge current after passing through the device of the present invention.
１ 変電所等の電気所 ２ 送電線路の電力線 ３ 落雷 ４ 雷サージ電流 ５ 高圧サージ低減装置 ６ フェライト・コア等のリング状の磁性体 ７ 金属薄膜 ８ 取り付け器具 ９ 高圧サージ低減装置通過後の雷サージ電流 1 Electric power stations such as substations 2 Power lines of transmission lines 3 Lightning strikes 4 Lightning surge currents 5 High-voltage surge reducing devices 6 Ring-shaped magnetic materials such as ferrite cores 7 Metal thin film 8 Attachments 9 Lightning surge after passing high-voltage surge reducing devices Electric current
───────────────────────────────────────────────────── フロントページの続き (72)発明者 荒金 昌克 三重県桑名市野田２丁目７−15 (72)発明者 福井 信孝 石川県松任市福留町857−51 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Masakatsu Arakane 2-7-15 Noda, Kuwana City, Mie Prefecture (72) Nobutaka Fukui 857-51, Fukudomecho, Matsuto City, Ishikawa Prefecture
Claims (2)
電線(2) に、フェライト・コア等の磁性体のように磁性
効果が特定周波数帯域になるようにした磁性体(6) を、
金属薄膜(7) で被覆し、取り付け器具(8)を用いて当該
磁性体(6) が直接電力線(2) 等を取り囲むように複数個
取り付けることを特徴とする大電流高圧サージ低減装
置。1. A magnetic material (6), such as a magnetic material such as a ferrite core, whose magnetic effect is in a specific frequency band, is applied to an electric wire (2) to which high voltage is applied, such as a power line of a power transmission and distribution line.
A large-current high-voltage surge reducing device characterized by being covered with a metal thin film (7), and a plurality of magnetic bodies (6) are directly attached by using an attaching device (8) so as to surround the power line (2) and the like.
ではなく、磁性体(6) の一部分のみを金属導体で取り囲
み電気的に短絡したことを特徴とする請求項１に記載の
大電流高圧サージ低減装置。2. The metal thin film (7) is characterized in that not a whole circumference of the magnetic body (6) but only a part of the magnetic body (6) is surrounded by a metal conductor and electrically short-circuited. The high-current high-voltage surge reducer described in.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP33632491A JPH05153728A (en) | 1991-11-26 | 1991-11-26 | Large current high voltage surge reducer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP33632491A JPH05153728A (en) | 1991-11-26 | 1991-11-26 | Large current high voltage surge reducer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH05153728A true JPH05153728A (en) | 1993-06-18 |
Family
ID=18297945
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP33632491A Pending JPH05153728A (en) | 1991-11-26 | 1991-11-26 | Large current high voltage surge reducer |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH05153728A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH09271138A (en) * | 1996-03-29 | 1997-10-14 | Chubu Electric Power Co Inc | Lightning-proof system for waveguide |
| CN112086258A (en) * | 2020-09-09 | 2020-12-15 | 中铁科学研究院有限公司成都分公司 | Inductive-reactance type low-voltage surge protection device |
| CN114678850A (en) * | 2022-03-15 | 2022-06-28 | 昆明理工大学 | Magnetic ring device for suppressing lightning waves |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5529259A (en) * | 1978-08-23 | 1980-03-01 | Hitachi Ltd | Surge energy absorbing element |
-
1991
- 1991-11-26 JP JP33632491A patent/JPH05153728A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5529259A (en) * | 1978-08-23 | 1980-03-01 | Hitachi Ltd | Surge energy absorbing element |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH09271138A (en) * | 1996-03-29 | 1997-10-14 | Chubu Electric Power Co Inc | Lightning-proof system for waveguide |
| CN112086258A (en) * | 2020-09-09 | 2020-12-15 | 中铁科学研究院有限公司成都分公司 | Inductive-reactance type low-voltage surge protection device |
| CN114678850A (en) * | 2022-03-15 | 2022-06-28 | 昆明理工大学 | Magnetic ring device for suppressing lightning waves |
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