JP2001033510A - Method and equipment for searching generation position of distribution line partial discharge - Google Patents
Method and equipment for searching generation position of distribution line partial dischargeInfo
- Publication number
- JP2001033510A JP2001033510A JP11208680A JP20868099A JP2001033510A JP 2001033510 A JP2001033510 A JP 2001033510A JP 11208680 A JP11208680 A JP 11208680A JP 20868099 A JP20868099 A JP 20868099A JP 2001033510 A JP2001033510 A JP 2001033510A
- Authority
- JP
- Japan
- Prior art keywords
- partial discharge
- distribution line
- measurement point
- receiving antennas
- antenna
- 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.)
- Granted
Links
Landscapes
- Testing Relating To Insulation (AREA)
- Locating Faults (AREA)
- Position Fixing By Use Of Radio Waves (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、配電線で発生して
いる部分放電をアンテナで電波信号として検出し、その
発生位置を特定するための検出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 detection device for detecting a partial discharge generated in a distribution line as a radio signal by an antenna and specifying a position where the partial discharge is generated.
【０００２】[0002]
【従来の技術】配電線設備に絶縁不良や接触不良がある
と、その部分で部分放電が発生しやすく、状況が悪化す
ると設備故障による停電を招くおそれがある。2. Description of the Related Art If there is poor insulation or poor contact in a distribution line facility, a partial discharge is likely to occur at that part, and if the situation worsens, a power failure due to facility failure may occur.
【０００３】又、故障に至らなくても部分放電自体が近
隣のＴＶ画面への斑点状ノイズやラジオ音声へのパルス
雑音の発生原因となる。[0003] Even if a failure does not occur, the partial discharge itself causes spot noise on a nearby TV screen and pulse noise on radio sound.
【０００４】そのため、配電線設備の部分放電を早期に
発見し、改修することが求められる。しかしながら、配
電線は広い範囲にわたって複雑に設置されているため、
部分放電箇所を発見するのは困難を極める。[0004] Therefore, it is required to detect and repair the partial discharge of distribution line equipment at an early stage. However, because distribution lines are installed in a wide range and complicated,
It is extremely difficult to find a partial discharge location.
【０００５】検査は区域を定めて定期的に行うようにし
ているが、目視による確認では見落としが生じることが
あり、しかも広域な地域を検査するので検査周期は長く
ならざるを得ず、常に良好な状態に維持しておくことは
困難である。[0005] The inspection is performed periodically by defining an area. However, oversight may be overlooked by visual inspection. In addition, since a wide area is inspected, the inspection cycle must be long, and the inspection is always good. It is difficult to maintain the state.
【０００６】実際には、近隣住民からのＴＶのノイズや
ラジオの雑音についての苦情があった際に、その地域に
出向いて検査を行うことが多い。検査は目視と共にＡＭ
ラジオをつけ、移動等に伴うノイズの変化等から経験的
に部分放電発生位置を探っていく方法が一般的である。
しかしながら、ＡＭラジオを使った方法は、定量的に判
断できず、指向性も無いので、部分放電発生源の特定が
困難であり熟練が要求される。[0006] In practice, when there is a complaint about TV noise or radio noise from a local resident, it is often the case that a visit is made to a local area for inspection. Inspection is AM with visual inspection
A general method is to turn on a radio and empirically search for a partial discharge occurrence position based on a change in noise due to movement or the like.
However, since the method using AM radio cannot be quantitatively determined and has no directivity, it is difficult to identify a partial discharge generation source and requires skill.
【０００７】又、発電所や変電所等の施設において、設
備内に複数組の受信アンテナを設け、部分放電に起因す
る電波信号を受信して部分放電の箇所を見つけようとす
る検出方法が提案されており（例えば特開平５−２８８
８２３号）、このような方法を配電線設備の部分放電の
検出に適用することも考えられる。Further, in a facility such as a power plant or a substation, a detection method is proposed in which a plurality of sets of receiving antennas are provided in a facility to receive a radio signal caused by a partial discharge and try to find a location of the partial discharge. (For example, see JP-A-5-288).
No. 823), such a method may be applied to detection of partial discharge of distribution line facilities.
【０００８】この方法は施設の周囲に２本１組となる受
信アンテナを複数組備え、各アンテナへの電波信号の到
達時間差を空間位相差法を用いて求め、双曲線法を介し
て部分放電発生源を検出可能としている。In this method, a plurality of pairs of receiving antennas are provided around a facility, and the arrival time difference of a radio signal to each antenna is obtained by a spatial phase difference method, and partial discharge is generated through a hyperbolic method. The source is detectable.
【０００９】しかしながら、特定の施設ではなく広大な
範囲に設けられる配電線設備に、この方法を適用しよう
とすると極めて多くのアンテナを所定間隔毎に配置しな
ければならいので現実的ではなく、各所の受信アンテナ
とデータ処理する処理施設との間のデータ移送も困難で
ある。[0009] However, if this method is applied to a distribution line facility provided not in a specific facility but in a vast area, an extremely large number of antennas must be arranged at predetermined intervals, which is not practical. Data transfer between the receiving antenna and the processing facility that processes the data is also difficult.
【００１０】又、特定施設内の検出の場合は施設の周囲
に設けられたアンテナ群の内側に部分放電発生源がある
ため比較的良好な検出精度が得やすいが、部分放電発生
源の位置が広域にわたる場合は誤差が大きく、十分な検
出精度を期待することができない。In the case of detection within a specific facility, a relatively good detection accuracy is easily obtained because the partial discharge source is located inside an antenna group provided around the facility. In a wide area, the error is large and sufficient detection accuracy cannot be expected.
【００１１】更に、雑音源が比較的限られる発電所や変
電所とは異なり、配電線は当然に市街地や工場地帯にも
設けられているので、工場、店舗、違法無線等の雑音発
生源が多数あり、仮に部分放電発生源の位置を特定でき
たとしても、それが配電線設備の部分放電であるのか、
他の原因によるものであるのか特定することができな
い。Furthermore, unlike power plants and substations, where noise sources are relatively limited, distribution lines are naturally provided in urban areas and factory areas, so noise sources such as factories, stores, illegal radios, etc. There are many, even if the location of the partial discharge source could be specified, is it a partial discharge of distribution line equipment,
It is not possible to determine if it is due to other causes.
【００１２】又、電波信号は道路等で反射し、この反射
波が受信アンテナに受信されると、直接受信した電波と
反射波とが重なり合い、到達時間差を正確に求めること
が困難となる。Further, the radio signal is reflected on a road or the like, and when the reflected wave is received by the receiving antenna, the directly received radio wave and the reflected wave overlap, and it is difficult to accurately determine the arrival time difference.
【００１３】したがって、施設内の部分放電を検出する
方法は、配電線設備の部分放電を検出にそのまま適用す
ることは不可能である。Therefore, it is impossible to apply the method of detecting partial discharge in the facility to the detection of partial discharge of distribution line equipment as it is.
【００１４】[0014]
【発明が解決しようとする課題】そこで、本発明は広範
囲に設けられた配電線設備の部分放電発生箇所を短時間
で、精度良く、しかも容易に探査することのできる手段
を提供することを課題とする。SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide means capable of exploring a partial discharge occurrence location of a distribution line facility provided in a wide range with high accuracy in a short time. And
【００１５】[0015]
【課題を解決するための手段】本発明の配電線部分放電
発生位置の探査方法は、第１の測定点で部分放電による
電波信号を２本１組となる複数組の受信アンテナで受信
し、組を構成する２本の受信アンテナへの電波信号の各
到達時間差より、双曲線法を介して部分放電発生源の方
向を検出すると共に第１の測定点の緯度，経度情報をＧ
ＰＳにより取り込み、その後、第２の測定点に移動し、
第２の測定点で同様の方法で部分放電発生源の方向を検
出すると共に第２の測定点の緯度，経度情報をＧＰＳに
より取り込み、ＧＰＳから取り込んだ各測定点の位置情
報と、各測定点で検出された各測定点からの部分放電発
生源の方向とを利用して表示装置に表示された配電線路
が記録された地図情報上に部分放電発生源の位置を特定
し、配電線路と部分放電発生源の位置とを比較して配電
線設備の部分放電か否かを判別することを特徴とする。According to the present invention, a method of searching for a position where a partial discharge has occurred in a distribution line according to the present invention is to receive a radio signal by partial discharge at a first measurement point by a plurality of pairs of receiving antennas. The direction of the partial discharge source is detected by the hyperbolic method from the difference between the arrival times of the radio signals to the two receiving antennas constituting the set, and the latitude and longitude information of the first measurement point is represented by G.
Captured by PS, then moved to the second measurement point,
At the second measurement point, the direction of the partial discharge source is detected by the same method, the latitude and longitude information of the second measurement point is fetched by GPS, the position information of each measurement point fetched from GPS, and each measurement point Using the direction of the partial discharge source from each measurement point detected in the above, the position of the partial discharge source is specified on the map information in which the distribution line displayed on the display device is recorded, and the distribution line and the partial It is characterized in that it is compared with the position of the discharge generation source to determine whether or not the partial discharge of the distribution line equipment.
【００１６】これによれば、２本１組の受信アンテナが
受信する電波信号の到達時間差から各受信アンテナの部
分放電発生源からの距離差を計算することにより距離差
が一定となる双曲線を求めることができる。他の組の受
信アンテナを用いて同様に双曲線を求め、２つの双曲線
の交点の座標を求めることにより部分放電発生源の座標
を得ることができる。このときの測定点の位置はＧＰＳ
により知ることができる。According to this, a hyperbola with a constant distance difference is obtained by calculating the distance difference from the partial discharge source of each receiving antenna from the arrival time difference of the radio signal received by a pair of receiving antennas. be able to. Similarly, the hyperbola is obtained using another set of receiving antennas, and the coordinates of the intersection of the two hyperbolas are obtained, whereby the coordinates of the partial discharge source can be obtained. The position of the measurement point at this time is GPS
You can know by.
【００１７】これだけでも部分放電発生源の位置をある
程度知ることができるが、本発明では２カ所以上の異な
る測定点で同様の測定を行うことにより精度を高めてい
る。すなわち、２カ所以上の測定点から、部分放電発生
源があると推定される方向にのばした直線の交点を求
め、その位置を部分放電発生源の位置と特定する。Although the position of the partial discharge source can be known to some extent by this alone, in the present invention, the accuracy is improved by performing the same measurement at two or more different measurement points. That is, from two or more measurement points, the intersection of a straight line extending in the direction in which the partial discharge source is estimated to be found is determined, and that position is specified as the position of the partial discharge source.
【００１８】そして、ＧＰＳより得られた測定点の位置
情報を用いて特定された部分放電発生源位置を配電線路
が表示された地図情報上に表示し、それが配電線設備の
部分放電に起因するものであるか否かを確認することが
できる。Then, the partial discharge source position specified by using the position information of the measurement point obtained from the GPS is displayed on the map information on which the distribution line is displayed, which is caused by the partial discharge of the distribution line equipment. Can be confirmed.
【００１９】請求項２配電線部分放電発生位置の探査装
置は、移動体(A)に測定点の緯度，経度情報を得るため
のＧＰＳアンテナ(5)と、部分放電により生じた電波信
号を受信するための３本以上の受信アンテナ(1)，(2)，
(3)，(4)が備えられており、組となる２本の受信アンテ
ナの部分放電発生源からの電波信号の到達時間差を２組
分求め、双曲線法を介して部分放電発生源の方向を検出
する演算装置(9)と、配電線路が記録された地図情報(2
8)上に２カ所の各測定点から演算装置(9)により得られ
た部分放電発生源方向へ伸ばした直線(24)，(25)、又は
該２本の直線の交点(23)を表示可能な表示装置(9a)を備
えていることを特徴とする。A second aspect of the present invention provides an apparatus for searching for a position where a partial discharge has occurred in a distribution line. More than two receiving antennas (1), (2),
(3) and (4) are provided, and two sets of reception time differences of radio signals from the partial discharge sources of the two receiving antennas are obtained, and the direction of the partial discharge source is determined via the hyperbolic method. (9) and map information (2
8) The straight lines (24) and (25) extending from the two measurement points toward the partial discharge source obtained by the arithmetic unit (9) from the two measurement points or the intersection (23) of the two straight lines are displayed. A possible display device (9a).
【００２０】これによれば請求項１の探査方法を実施す
るために必要な複数組の受信アンテナ(1)，(2)，(3)，
(4)、緯度，経度情報を取り込むためのＧＰＳアンテナ
(5)、到達時間差や双曲線法の演算を行い部分放電発生
源の方向を検出する演算装置(9)、地図情報を表示する
表示装置(9a)を備え、移動体(A)により測定点間の移動
が容易であるので、請求項１の探査方法を容易に行うこ
とができる。According to this, a plurality of sets of receiving antennas (1), (2), (3), and
(4) GPS antenna for capturing latitude and longitude information
(5) An arithmetic unit (9) that calculates the arrival time difference and the hyperbolic method to detect the direction of the partial discharge source, and a display device (9a) that displays map information, Is easily moved, so that the search method of claim 1 can be easily performed.
【００２１】請求項３記載の配電線部分放電発生位置の
探査装置は、請求項２の装置において、移動体(A)は自
動車であり、ＧＰＳアンテナと受信アンテナは自動車の
上部に備えられていることを特徴とする。According to a third aspect of the present invention, there is provided an apparatus for detecting a partial discharge occurrence position of a distribution line according to the second aspect, wherein the mobile unit (A) is an automobile, and the GPS antenna and the receiving antenna are provided at an upper part of the automobile. It is characterized by the following.
【００２２】これによれば、自動車により移動すること
ができ、道路近くの送電線を検査するのが容易である。According to this, the vehicle can be moved by car, and it is easy to inspect a power line near a road.
【００２３】請求項４記載の配電線部分放電発生位置の
探査装置は、請求項２又は請求項３の装置において、同
一平面上に設けられた３本以上の受信アンテナと、前記
受信アンテナの配された平面上とは異なる位置に設けら
れた１本以上の受信アンテナを備えたことを特徴とす
る。According to a fourth aspect of the present invention, in the device for detecting a partial discharge occurrence position of a distribution line according to the second or third aspect, three or more receiving antennas provided on the same plane and the distribution of the receiving antennas are provided. And at least one receiving antenna provided at a position different from the plane on which the receiving antenna is provided.
【００２４】これによれば、同一平面上に無い受信アン
テナを組にして時間差を求めることにより３組以上の双
曲面を得ることができるので、これらの交点又は領域を
求めることにより、部分放電発生源の場所を平面的な方
向のみならず、その高さ方向も知ることもできる。According to this, three or more sets of hyperboloids can be obtained by determining the time difference by using a set of receiving antennas that are not on the same plane. The location of the source can be known not only in a planar direction but also in its height direction.
【００２５】請求項５記載の配電線部分放電発生位置の
探査装置は、請求項３の装置において、受信アンテナが
反射波から受ける影響を少なくするために、受信アンテ
ナの下方に反射波入射抑制用の金属パネル(6)が備えら
れていることを特徴とする。According to a fifth aspect of the present invention, there is provided an apparatus for detecting a partial discharge occurrence position of a distribution line according to the third aspect of the present invention, wherein the reflected wave is suppressed below the receiving antenna in order to reduce the influence of the reflected wave on the receiving antenna. A metal panel (6).
【００２６】これによれば、地面等で反射した電波を金
属パネル(6)で遮ることができ、反射波の受信アンテナ
への入射を抑制して、検出精度を高くすることができ
る。According to this, the radio wave reflected on the ground or the like can be blocked by the metal panel (6), and the incidence of the reflected wave on the receiving antenna can be suppressed, and the detection accuracy can be increased.
【００２７】[0027]
【発明の実施の形態】以下、本発明を好適な実施例を用
いて説明する。 ［実施例］図１は本実施例に用いる測定車を示した図で
あり、図２はその計測システムを示した図である。DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to preferred embodiments. [Embodiment] FIG. 1 is a diagram showing a measuring vehicle used in the present embodiment, and FIG. 2 is a diagram showing the measuring system.
【００２８】(A)は測定車であり、天井部に４本の広帯
域・無指向性の受信アンテナ(1)〜(4)が正方形の角とな
る位置に立設されている。(A) is a measuring vehicle, in which four broadband, non-directional receiving antennas (1) to (4) are erected on the ceiling at square corners.
【００２９】(5)は測定車(A)の天井部に設けられたＧＰ
Ｓ（Global Positioning System）アンテナである。Ｇ
ＰＳは地球低軌道に打ち上げられた衛星からの電波を受
信して現在位置の経緯度を知ることのできるシステムで
あり、近年ではカーナビゲーションシステム等にも利用
されている。(5) GP mounted on the ceiling of the measuring vehicle (A)
It is an S (Global Positioning System) antenna. G
The PS is a system that can receive radio waves from a satellite launched into a low earth orbit to know the latitude and longitude of the current position, and has recently been used for a car navigation system and the like.
【００３０】(6)はアルミ板からなる反射波抑制パネル
であり、受信アンテナ(1)〜(4)の下方と進行方向の前後
に配されている。前後の反射波抑制パネル(6a)は前後方
向Ｋ地面からの反射波を遮るように斜めに跳ね上げたよ
うになっている。(6) is a reflected wave suppression panel made of an aluminum plate, which is arranged below the receiving antennas (1) to (4) and before and after in the traveling direction. The front and rear reflected wave suppression panels (6a) are configured to be tilted upward so as to block reflected waves from the ground in the front and rear direction K.
【００３１】尚、車幅が広くなってしまい測定車(A)が
走行する際に邪魔になるので受信アンテナ(1)〜(4)の側
方には反射波抑制パネルは設けなかったが、測定時のみ
使用できるような折り畳み式や着脱可能な側方用の反射
波抑制パネルを設けても良い。Incidentally, the reflected wave suppression panel was not provided on the side of the receiving antennas (1) to (4) because the width of the vehicle was widened and became a hindrance when the measuring vehicle (A) traveled. A foldable or detachable side reflected wave suppression panel that can be used only during measurement may be provided.
【００３２】(8)は高速Ａ−Ｄ変換器であり、各受信ア
ンテナ(1)〜(4)と低損失信号線（同軸ケーブル）(7)で
接続されている。このとき各低損失信号線(7)の長さは
同一としている。(8) is a high-speed A / D converter, which is connected to each of the receiving antennas (1) to (4) by a low-loss signal line (coaxial cable) (7). At this time, the length of each low-loss signal line (7) is the same.
【００３３】(9)は解析ソフトがインストールされた演
算処理装置としてのパソコンである。表示装置(9a)とし
ては同じパソコン(9)のモニターを利用することができ
る。(9) is a personal computer as an arithmetic processing device in which analysis software is installed. The monitor of the same personal computer (9) can be used as the display device (9a).
【００３４】(10)は測定結果等をプリントするためのプ
リンターである。(10) is a printer for printing measurement results and the like.
【００３５】(13)はパソコン(9)と高速Ａ−Ｄ変換器(8)
とを接続するためのインターフェイスカードであり、(1
4)はパソコン(9)とＧＰＳアンテナ(5)とを接続するため
のインターフェイスカードである。高速Ａ−Ｄ変換器
(8)，パソコン(9)，プリンター(10)等は測定車(A)の車
内に搭載されている。高速Ａ−Ｄ変換器(8)，パソコン
(9)，プリンター(10)の電源には車載したバッテリー(1
1)とインバーター(12)を用いている。(13) A personal computer (9) and a high-speed A / D converter (8)
Interface card for connecting
4) is an interface card for connecting the personal computer (9) and the GPS antenna (5). High speed A / D converter
(8), personal computer (9), printer (10), etc. are mounted inside the measuring vehicle (A). High-speed AD converter (8), PC
(9) The printer (10) is powered by a battery (1
1) and an inverter (12) are used.
【００３６】まず、測定車で第１の測定点に行き、受信
アンテナ(1)，(2)，(3)，(4)で、部分放電に起因する電
波信号を４チャンネル，すなわち４本の受信アンテナを
用いて受信する。それらしき電波が検知されない場合
は、近くに部分放電箇所が無いと判断して、新たな第１
の測定点となるべき箇所に移動して受信をやり直す。First, the user goes to the first measurement point in the measurement vehicle, and the receiving antennas (1), (2), (3), and (4) transmit radio signals resulting from partial discharge to four channels, that is, four channels. Receive using a receiving antenna. If no such radio waves are detected, it is determined that there is no partial discharge location nearby, and a new first discharge is detected.
Move to the point that should be the measurement point for and repeat the reception.
【００３７】本実施例では４本の受信アンテナ(1)，
(2)，(3)，(4)を２組に分けて受信アンテナ(1)とその対
角位置にある受信アンテナ(2)を第１の組、受信アンテ
ナ(3)とその対角位置にある受信アンテナ(4)を第２の組
とした。In this embodiment, four receiving antennas (1),
(2), (3) and (4) are divided into two sets, the receiving antenna (1) and the receiving antenna (2) at the diagonal position of the first set, the receiving antenna (3) and the diagonal position thereof The second set of the receiving antennas (4) in (1) was used.
【００３８】２本が１組となる受信アンテナを２組用意
するためには本実施例のように４本の受信アンテナを使
用するのが簡単であるが、３本の受信アンテナを用い、
その内１本を両組で共用する受信アンテナとすることも
できる。In order to prepare two sets of two receiving antennas, it is easy to use four receiving antennas as in the present embodiment. However, using three receiving antennas,
One of them may be used as a receiving antenna shared by both sets.
【００３９】部分放電があれば、それによるパルス信号
は各アンテナ(1)，(2)，(3)，(4)に到達し、電圧に変換
され、低損失信号線(7)を通って高速Ａ−Ｄ変換器(8)に
てデジタル変換され、パソコン(9)に転送される。If there is a partial discharge, the pulse signal resulting therefrom reaches each antenna (1), (2), (3), (4), is converted into a voltage, and passes through a low-loss signal line (7). The digital data is converted by the high-speed A / D converter (8) and transferred to the personal computer (9).
【００４０】部分放電発生源との距離により同じパルス
信号でも各アンテナ(1)，(2)，(3)，(4)に到達する時間
に僅かな差が生じる。２つの受信アンテナを基準点とし
てこれらの基準点からの距離差が一定な点の軌跡は両基
準点を焦点とする双曲線となるので、到達時間差からア
ンテナ１(1)−アンテナ２(2)間の双曲線と、アンテナ３
(3)−アンテナ４(4)間の双曲線を求める。Depending on the distance from the partial discharge source, there is a slight difference in the time to reach each antenna (1), (2), (3), (4) even with the same pulse signal. Since the trajectory of a point having a constant distance difference from these reference points with the two receiving antennas as reference points is a hyperbola with the focus on both reference points, the distance between the antenna 1 (1) and the antenna 2 (2) can be calculated from the arrival time difference. Hyperbola and antenna 3
(3) Obtain a hyperbola between the antenna 4 (4).
【００４１】そして、２組の受信アンテナにより得られ
た２つの双曲線の交点座標を求めれば部分放電発生源の
位置を標定することができる。Then, if the coordinates of the intersection of two hyperbolas obtained by the two sets of receiving antennas are obtained, the position of the partial discharge source can be located.
【００４２】そこで、パソコン(9)によりアンテナ１(1)
とアンテナ２(2)との到達時間差、及びアンテナ３(3)と
アンテナ４(4)との到達時間差を演算するが、本実施例
では100パルス取り込んで空間位相差法を用いて求め
た。Then, the antenna 1 (1) is operated by the personal computer (9).
The arrival time difference between the antenna and the antenna 2 (2) and the arrival time difference between the antenna 3 (3) and the antenna 4 (4) are calculated. In the present embodiment, 100 pulses were acquired and the spatial phase difference method was used.
【００４３】空間位相差法は、放射電磁波が空間を伝搬
するときの空間位相差を利用して電磁波放射源を検出す
る方法であるが、到達時間差を精度良く検出できるので
あれば、これに限定されるものではなく、他の手段によ
り時間差を求めても良い。尚、適宜フィルタ回路を設け
たり、演算処理により受信信号から背景雑音を除去する
ようにすると精度が高くなる。The spatial phase difference method is a method of detecting an electromagnetic wave radiation source using a spatial phase difference when a radiated electromagnetic wave propagates in space. However, the method is not limited to this as long as the arrival time difference can be detected accurately. Instead, the time difference may be obtained by other means. Note that if a filter circuit is appropriately provided or background noise is removed from the received signal by arithmetic processing, the accuracy will be increased.
【００４４】受信アンテナと放電点との距離の差を電波
の到達時間差として捉えると、発生源の位置は双曲線法
により下記の式を説くことで標定することができる。If the difference in the distance between the receiving antenna and the discharge point is taken as the difference in the arrival time of the radio wave, the position of the source can be located by the following equation using the hyperbolic method.
【００４５】[0045]
【数１】 (Equation 1)
【００４６】[0046]
【数２】 (Equation 2)
【００４７】但し、ここで ｔ12＝ｔ2−ｔ1（受信アンテナ１と受信アンテナ２の時
間差） ｔ34＝ｔ4−ｔ3（受信アンテナ３と受信アンテナ４の時
間差） ｃ＝光速（３×１０8） (m/sec) Ｈ＝アンテナの間隔 (m) である。図３は位置標定の概要を示した図である。Here, t 12 = t 2 −t 1 (time difference between receiving antenna 1 and receiving antenna 2) t 34 = t 4 −t 3 (time difference between receiving antenna 3 and receiving antenna 4) c = light speed (3 × 10 8 ) (m / sec) H = interval between antennas (m). FIG. 3 is a diagram showing an outline of position location.
【００４８】尚、本実施例では４本の受信アンテナを全
て同一平面上に配したが、同一平面上に無い受信アンテ
ナを用いて３組以上から得られる到達時間差に基づい
て、３組以上の異なる双曲面を求めれば、これらにより
設定される交点又は領域によって高さ方向も加えた空間
位置を特定することができる。In this embodiment, all four receiving antennas are arranged on the same plane. However, based on arrival time differences obtained from three or more sets using receiving antennas not on the same plane, three or more sets are used. If different hyperboloids are obtained, a spatial position including the height direction can be specified by an intersection or a region set by these.
【００４９】部分放電発生源の位置検出と同時に、又は
それに前後してＧＰＳアンテナを利用してその測定点の
緯度，経度情報をパソコン(9)に取り込んでおく。Simultaneously with or before or after the detection of the position of the partial discharge source, the latitude and longitude information of the measurement point is taken into the personal computer (9) using a GPS antenna.
【００５０】本実施例では１カ所の測定点で測定に要す
る時間は数分程度であった。その後、第２の測定点へ移
動する。全ての装置は測定車(A)に搭載されているの
で、極めて容易に移動することができる。In this example, the time required for measurement at one measurement point was about several minutes. After that, it moves to the second measurement point. Since all the devices are mounted on the measuring vehicle (A), they can be moved very easily.
【００５１】第２の測定点においても第１の測定点で行
ったのと同様にして部分放電発生源の方向を特定すると
共に、第２の測定点の緯度，経度情報をＧＰＳより取り
込む。At the second measurement point, the direction of the partial discharge source is specified in the same manner as performed at the first measurement point, and the latitude and longitude information of the second measurement point is taken in from the GPS.
【００５２】次に、このようにして得られたデータを用
いて部分放電発生源の位置を特定する、図４は２地点か
ら位置推定の概念を示した図であり、図５は表示装置(9
a)に表示される表示面(20)の一例を示した図である。Next, the position of the partial discharge source is specified using the data obtained in this manner. FIG. 4 is a diagram showing the concept of position estimation from two points, and FIG. 9
FIG. 6 is a diagram showing an example of a display surface (20) displayed in a).
【００５３】表示部となるパソコンのモニター(9a)には
カーナビゲーションシステムと同様に地図情報(28)が表
示されるが、その地図情報(28)上には道路(27)等と共に
配電線路(26)が表示される。表示面(20)には地図情報(2
8)と共に、各測定位置の緯度，経度情報、及び標定位置
の差座標等も表示される。Map information (28) is displayed on the monitor (9a) of the personal computer serving as a display unit, similarly to the car navigation system. On the map information (28), along with the road (27) and the like, the distribution line ( 26) is displayed. The map information (2
Along with 8), the latitude and longitude information of each measurement position, the difference coordinates of the orientation position, and the like are also displayed.
【００５４】第１の測定点と第２の測定点が地図上の該
当する位置に表示され、各測定点(21)，(22)から各測定
時に部分放電発生源と考えられる箇所に向かってのびる
直線(24)，(25)も同時に表示される。この直線(24)，(2
5)の交点となる位置(23)が部分放電発生源と特定でき
る。このように２カ所以上からの測定結果に基づき探査
しているので、精度が良い。必要なら、３カ所以上で測
定して３本の直線の交点又は３本の直線で囲まれた範囲
を求めるようにしてもよい。The first measurement point and the second measurement point are displayed at the corresponding positions on the map, and from each of the measurement points (21) and (22), a position considered as a partial discharge generation source at each measurement. Extending straight lines (24) and (25) are also displayed at the same time. This straight line (24), (2
The position (23) at the intersection of 5) can be specified as the partial discharge generation source. Since the search is performed based on the measurement results from two or more places, the accuracy is high. If necessary, measurement may be performed at three or more locations to determine the intersection of three straight lines or a range surrounded by three straight lines.
【００５５】尚、本実施例では各測定点(21)，(22)から
の直線(24)，(25)を画面上に表示するようにしたが、２
本の直線の交点(23)を示すことができれば、これらの直
線(24)，(25)は必ずしも画面上に表示させる必要はな
い。In this embodiment, the straight lines (24) and (25) from the respective measurement points (21) and (22) are displayed on the screen.
If the intersection (23) of the straight lines can be indicated, these straight lines (24) and (25) do not necessarily need to be displayed on the screen.
【００５６】配電線路図と交点の位置とを比較して、交
点により特定された場所が配電線の設けられていない場
所である場合には、配電線設備の部分放電ではなく、他
のノイズ発生源によるものと考えることができる。又、
数回測定して部分放電発生源と思われる場所が移動して
いるような場合には、車載や携帯式の違法無線等の可能
性が高いと考えることができる。By comparing the distribution line diagram with the position of the intersection, if the location specified by the intersection is a location where no distribution line is provided, it is not a partial discharge of the distribution line equipment but another noise generation. Can be attributed to the source. or,
If the place which is considered to be the partial discharge source is measured several times and is moving, it can be considered that the possibility of in-vehicle or portable illegal radio is high.
【００５７】このように配電線設備の部分放電ではない
と明確に判断できる場合には、わざわざ改修に向かう必
要はない。When it can be clearly determined that the discharge is not a partial discharge of the distribution line equipment, it is not necessary to go to the repair.
【００５８】測定車(A)に保守作業者を乗せておいて
（又は保守作業員に測定者や運転者を兼ねさせ）、部分
放電箇所を探知する度に改修させることも可能ではある
が、保守用具の収納スペースが必要となり、効率もあま
り良くないので、測定者は部分放電発生源を特定した
後、無線や電話等で保守作業員に場所を連絡して出向か
せるようにした方が望ましい。It is also possible to place a maintenance worker on the measuring vehicle (A) (or make the maintenance worker also serve as a measurement worker or a driver) and repair the part every time a partial discharge location is detected. Since the storage space for maintenance tools is required and the efficiency is not very good, it is better for the measurer to identify the source of the partial discharge and then contact the maintenance worker by radio or telephone to send the location to go to the site .
【００５９】必要により、表示画面やデータをパソコン
(9)に接続されたプリンター(10)でプリントすることが
できる。結果はパソコンのハードディスクやＭＯ等の記
録媒体に記録しておくことができ、通信回線を用いて基
地に転送するようにしても良い。If necessary, display screens and data on a PC
Printing can be performed by the printer (10) connected to (9). The result can be recorded on a recording medium such as a hard disk of a personal computer or an MO, and may be transferred to a base using a communication line.
【００６０】尚、本実施例では移動体として自動車を用
いたが、近くに道路がない山奥の送電線設備を調べるた
めには、ヘリコプター等に受信アンテナとＧＰＳアンテ
ナの装置を搭載して送電線の近くを飛行することによ
り、探査することもできる。In this embodiment, an automobile is used as a moving body. However, in order to check transmission line facilities in a mountainous area without a nearby road, a transmission antenna is mounted on a helicopter or the like by mounting a receiving antenna and a GPS antenna device. You can also explore by flying near.
【００６１】又、実施例では各測定点で停止して測定を
行ったが、電波受信や演算処理の高速化や移動に伴う演
算の修正等を行えば、移動しながらの探査も可能とな
る。In the embodiment, the measurement is performed while stopping at each measurement point. However, if the speed of radio wave reception and calculation processing is increased, and the calculation accompanying the movement is corrected, it is possible to search while moving. .
【００６２】[0062]
【発明の効果】以上述べたように本発明により、広範囲
に設けられた配線設備の部分放電発生箇所を短時間で、
精度良く、しかも熟練を要することなく容易に探査する
ことのできる手段を提供することができる。As described above, according to the present invention, it is possible to reduce the occurrence of partial discharge in a wide range of wiring facilities in a short time.
It is possible to provide a means that can be easily searched with high accuracy and without skill.
【図１】実施例に用いる測定車を示した図。FIG. 1 is a diagram showing a measuring vehicle used in an embodiment.
【図２】実施例の計測システムを示した図。FIG. 2 is a diagram showing a measurement system according to an embodiment.
【図３】位置標定の概要を示した図。FIG. 3 is a diagram showing an outline of position location.
【図４】２地点から位置推定の概念を示した図。FIG. 4 is a diagram showing a concept of position estimation from two points.
【図５】表示装置の表示内容の一例を示した図。FIG. 5 is a diagram showing an example of display contents of a display device.
(A) 測定車 (1)〜(4) 受信アンテナ (5) ＧＰＳアンテナ (6) 反射波抑制パネル (7) 低損失信号線 (8) 高速Ａ−Ｄ変換器 (9) 演算処理装置（パソコン） (9a) 表示装置（パソコンのモニター） (10) プリンター (20) 表示部の表示情報 (28) 地図情報 (A) Measurement vehicle (1) to (4) Receiving antenna (5) GPS antenna (6) Reflected wave suppression panel (7) Low loss signal line (8) High speed A / D converter (9) Arithmetic processing unit (PC) (9a) Display device (PC monitor) (10) Printer (20) Display information on display (28) Map information
フロントページの続き (72)発明者 川崎 誠 大阪市北区中之島６丁目２番27号 株式会 社関西テック内 (72)発明者 宮本 良治 大阪市北区中之島６丁目２番27号 株式会 社関西テック内 Ｆターム(参考） 2G015 AA27 CA01 2G033 AA01 AB01 AC05 AD19 AE04 AF02 AG12 AG14 5J062 AA01 BB00 CC07 CC12 GG02 HH05 Continuing from the front page (72) Inventor Makoto Kawasaki 6-2-27 Nakanoshima, Kita-ku, Osaka City Inside Kansai Tec Co., Ltd. (72) Inventor Ryoji Miyamoto 6-27 Nakanoshima, Kita-ku, Osaka Kansai Co., Ltd. F term in tech (reference) 2G015 AA27 CA01 2G033 AA01 AB01 AC05 AD19 AE04 AF02 AG12 AG14 5J062 AA01 BB00 CC07 CC12 GG02 HH05
Claims (5)
を２本１組となる複数組の受信アンテナで受信し、組を
構成する２本の受信アンテナへの電波信号の各到達時間
差より、双曲線法を介して部分放電発生源の方向を検出
すると共に第１の測定点の緯度，経度情報をＧＰＳによ
り取り込み、 その後、第２の測定点に移動し、第２の測定点で同様の
方法で部分放電発生源の方向を検出すると共に第２の測
定点の緯度，経度情報をＧＰＳにより取り込み、 ＧＰＳから取り込んだ各測定点の位置情報と、各測定点
で検出された各測定点からの部分放電発生源の方向とを
利用して表示装置に表示された配電線路が記録された地
図情報上に部分放電発生源の位置を特定し、 配電線路と部分放電発生源の位置とを比較して配電線設
備の部分放電か否かを判別することを特徴とする配電線
部分放電発生位置の探査方法。At a first measurement point, a radio signal due to partial discharge is received by a plurality of pairs of receiving antennas, one set of two receiving antennas, and the arrival time difference of the radio signal to two receiving antennas constituting the set is calculated based on each arrival time difference. , The direction of the partial discharge source is detected via the hyperbolic method, and the latitude and longitude information of the first measurement point is fetched by GPS. Thereafter, the operation is moved to the second measurement point, and the same is performed at the second measurement point. Detects the direction of the partial discharge source by the method, fetches the latitude and longitude information of the second measurement point by GPS, and calculates the position information of each measurement point fetched from the GPS and the measurement points detected at each measurement point. Identify the location of the partial discharge source on the map information that records the distribution line displayed on the display device using the direction of the partial discharge source and compare the distribution line with the position of the partial discharge source To determine if the distribution line equipment is partially discharged. A method for searching for a partial discharge occurrence position of a distribution line, characterized by determining.
ためのＧＰＳアンテナと、部分放電により生じた電波信
号を受信するための３本以上の受信アンテナが備えられ
ており、 組となる２本の受信アンテナの部分放電発生源からの電
波信号の到達時間差を２組分求め、双曲線法を介して部
分放電発生源の方向を検出する演算装置と、 配電線路が記録された地図情報上に２カ所の各測定点か
ら演算装置により得られた部分放電発生源方向へ伸ばし
た直線、又は該２本の直線の交点を表示可能な表示装置
を備えていることを特徴とする配電線部分放電発生位置
の探査装置。2. A mobile body is provided with a GPS antenna for obtaining latitude and longitude information of a measurement point and three or more receiving antennas for receiving a radio signal generated by partial discharge. An arithmetic unit for determining two sets of arrival time differences of radio signals from the partial discharge sources of the two receiving antennas and detecting the direction of the partial discharge source via the hyperbolic method; and a map information on which the distribution line is recorded. And a display device capable of displaying a straight line extending from each of the two measurement points toward the partial discharge source obtained by the arithmetic device, or an intersection of the two straight lines. An exploration device for the location where the discharge occurs.
と受信アンテナは自動車の上部に備えられていることを
特徴とする請求項２記載の配電線部分放電発生位置の探
査装置。3. The apparatus according to claim 2, wherein the mobile object is an automobile, and the GPS antenna and the receiving antenna are provided on an upper part of the automobile.
アンテナと、前記受信アンテナの配された平面上とは異
なる位置に設けられた１本以上の受信アンテナを備えた
ことを特徴とする請求項２又は請求項３記載の配電線部
分放電発生位置の探査装置。4. A radio communication system comprising: at least three receiving antennas provided on the same plane; and at least one receiving antenna provided at a position different from the plane on which the receiving antennas are arranged. 4. An apparatus for detecting a partial discharge occurrence position of a distribution line according to claim 2 or 3.
少なくするために、受信アンテナの下方に反射波入射抑
制用の金属パネルが備えられていることを特徴とする請
求項３記載の配電線部分放電発生位置の探査装置。5. The distribution line part according to claim 3, wherein a metal panel for suppressing the incidence of the reflected wave is provided below the receiving antenna so as to reduce the influence of the reflected wave on the receiving antenna. An exploration device for the location where the discharge occurs.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP20868099A JP3477116B2 (en) | 1999-07-23 | 1999-07-23 | Method and apparatus for detecting partial discharge occurrence position of distribution line |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP20868099A JP3477116B2 (en) | 1999-07-23 | 1999-07-23 | Method and apparatus for detecting partial discharge occurrence position of distribution line |
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| Publication Number | Publication Date |
|---|---|
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| JP3477116B2 JP3477116B2 (en) | 2003-12-10 |
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|---|---|---|---|
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Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2047285A2 (en) * | 2006-07-31 | 2009-04-15 | Exactor, Inc. | System and method for locating and analyzing arcing phenomena |
| JP2010043992A (en) * | 2008-08-14 | 2010-02-25 | Kagoshima Prefecture | Method and device for detecting electrostatic discharge generation position |
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1999
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| EP2047285A2 (en) * | 2006-07-31 | 2009-04-15 | Exactor, Inc. | System and method for locating and analyzing arcing phenomena |
| JP2010043992A (en) * | 2008-08-14 | 2010-02-25 | Kagoshima Prefecture | Method and device for detecting electrostatic discharge generation position |
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| JP2011047864A (en) * | 2009-08-28 | 2011-03-10 | Central Res Inst Of Electric Power Ind | Method and apparatus for searching incoming direction of pulsed radio noise |
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