JPH02154170A - Measuring method for partial discharge - Google Patents
Measuring method for partial dischargeInfo
- Publication number
- JPH02154170A JPH02154170A JP30927388A JP30927388A JPH02154170A JP H02154170 A JPH02154170 A JP H02154170A JP 30927388 A JP30927388 A JP 30927388A JP 30927388 A JP30927388 A JP 30927388A JP H02154170 A JPH02154170 A JP H02154170A
- Authority
- JP
- Japan
- Prior art keywords
- partial discharge
- lead wire
- high frequency
- measurement
- measuring method
- 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
- 238000000034 method Methods 0.000 title claims description 12
- WABPQHHGFIMREM-UHFFFAOYSA-N lead(0) Chemical compound [Pb] WABPQHHGFIMREM-UHFFFAOYSA-N 0.000 claims abstract description 21
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 15
- 238000005259 measurement Methods 0.000 claims abstract description 12
- 238000001514 detection method Methods 0.000 claims description 7
- 239000012212 insulator Substances 0.000 claims description 7
- 230000006866 deterioration Effects 0.000 claims description 4
- 238000000691 measurement method Methods 0.000 claims description 2
- 239000002184 metal Substances 0.000 abstract description 4
- 229910052751 metal Inorganic materials 0.000 abstract description 4
- 238000012360 testing method Methods 0.000 description 4
- 230000018199 S phase Effects 0.000 description 2
- 238000004891 communication Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000009413 insulation Methods 0.000 description 2
- 229910000976 Electrical steel Inorganic materials 0.000 description 1
- PMVSDNDAUGGCCE-TYYBGVCCSA-L Ferrous fumarate Chemical group [Fe+2].[O-]C(=O)\C=C\C([O-])=O PMVSDNDAUGGCCE-TYYBGVCCSA-L 0.000 description 1
- 239000002390 adhesive tape Substances 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 238000003745 diagnosis Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000004907 flux Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
Landscapes
- Testing Relating To Insulation (AREA)
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は電カケープル等の絶縁劣化を診断するための部
分放電測定方法に関する。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a partial discharge measuring method for diagnosing insulation deterioration of electric cables and the like.
第３図は従来の部分放電測定方法を示す。供試ケーブル
１は中間接続部２によって接続されており、終端接続部
３を介して高電圧充電部４に接続されている。中間接続
部２および終端接続部３のシースは接地線５．６を介し
て接地されている。FIG. 3 shows a conventional partial discharge measuring method. The cable under test 1 is connected by an intermediate connection part 2 and is connected to a high voltage charging part 4 via a terminal connection part 3. The sheaths of the intermediate connection 2 and the end connection 3 are grounded via a ground conductor 5.6.
ここで、供試ケーブル１の絶縁体の部分放電を測定する
ときは、接地線６を取り外してそこに検出インピーダン
ス７を挿入し、検出インピーダンス７に部分放電測定器
８を接続する。このとき、電カケープルｌの運転は停止
しており、高電圧充電部４より供試電圧を印加して部分
放電を測定する。絶縁体の部分放電は高周波パルスであ
るので、高周波パルスに基づいて検出インピーダンス７
の両端に電位差が発生する。それを部分放電測定器８で
検出する。検出されたデータは所定のデータ処理を受け
、それによって供試ケーブル１の絶縁体の劣化診断を行
う。Here, when measuring the partial discharge of the insulator of the test cable 1, the grounding wire 6 is removed, a detection impedance 7 is inserted therein, and a partial discharge measuring device 8 is connected to the detection impedance 7. At this time, the operation of the power cable I is stopped, and a test voltage is applied from the high voltage charging section 4 to measure partial discharge. Since the partial discharge of the insulator is a high frequency pulse, the detection impedance 7 is determined based on the high frequency pulse.
A potential difference occurs between both ends of the . This is detected by the partial discharge measuring device 8. The detected data is subjected to predetermined data processing, thereby diagnosing the deterioration of the insulation of the test cable 1.
しかし、従来の部分放電測定方法によると、接地線６を
取り外して検出インピーダンス７を挿入し、また、測定
が終了すると元の状態に戻さなければならないため、電
カケープル線路のシステムとしての信頼性が低下する恐
れがあり、また、活線時に測定することができないため
、システム運転を停止しなければならない。However, according to the conventional partial discharge measurement method, the grounding wire 6 must be removed, the detection impedance 7 must be inserted, and the system must be returned to its original state after the measurement is completed, which reduces the reliability of the power cable line as a system. In addition, since measurement cannot be performed while the line is live, system operation must be stopped.
従って、本発明の目的は接地線の取りはずし等を行わず
に部分放電の測定を行うことができる部分放電測定方法
を提供することである。Therefore, an object of the present invention is to provide a partial discharge measuring method that allows partial discharge to be measured without removing the grounding wire or the like.
本発明の他の目的はシステムの運転時においても測定を
行うことができる部分放電測定方法を提供することであ
る。Another object of the present invention is to provide a partial discharge measuring method that allows measurement even when the system is in operation.
［課題を解決するための手段］
本発明は上記の目的を実現するため、接地線等の部分放
電信号が流れるリード線に高インダクタンス素子を取り
付けてそのリード線の高周波インピーダンスを大にし、
リード線に並列に部分放電測定器を接続して部分放電信
号を測定する部分放電測定方法を提供する。[Means for Solving the Problems] In order to achieve the above object, the present invention attaches a high inductance element to a lead wire such as a ground wire through which a partial discharge signal flows, thereby increasing the high frequency impedance of the lead wire.
A partial discharge measuring method is provided in which a partial discharge measuring device is connected in parallel to a lead wire and a partial discharge signal is measured.
高インダクタンス素子は、例えば、けい素鋼材、その他
の高誘磁率の鉄芯によって構成され、内部にリード線の
外形に対応した取り付は孔を有し、２つ割等によってリ
ード線の外部より簡単に取り付けることができる。リー
ト線はそのために取り外される必要性がない。取り付け
られた鉄芯はフック等の保合手段によって固定されるこ
とが好ましいが、粘着テープ等によって固定しても良い
。A high inductance element is made of, for example, a silicon steel material or other high-permittivity iron core, and has a mounting hole inside that corresponds to the outer shape of the lead wire, and is cut into two parts or the like to allow it to be mounted from the outside of the lead wire. Easy to install. There is no need for the wire to be removed for this purpose. The attached iron core is preferably fixed by a retaining means such as a hook, but may also be fixed by an adhesive tape or the like.
この鉄芯は部分放電測定器の特性に適応させられる。即
ち、鉄芯はインダクタンスの周波数特性、飽和磁束密度
に基づいて寸法が決定され、また、リード線に流れる商
用周波零相電流等も考慮される。１個の鉄芯によっても
所定の高周波インピーダンスが得られないときは、複数
の鉄芯が直列に取り付けられる。このようにしてリード
線の高周波インピーダンスを所定の値にする。このリー
ド線に並列に部分放電測定器を接続する。部分放電は高
周波パルスであるのでリード線の高周波インピーダンス
によってリード線を流れるのを阻止される。従って、部
分放電測定器を流れることになり、そこで測定される。This iron core is adapted to the characteristics of the partial discharge meter. That is, the dimensions of the iron core are determined based on the frequency characteristics of the inductance and the saturation magnetic flux density, and the commercial frequency zero-sequence current flowing through the lead wires are also taken into consideration. When a predetermined high frequency impedance cannot be obtained even with one iron core, a plurality of iron cores are attached in series. In this way, the high frequency impedance of the lead wire is set to a predetermined value. Connect a partial discharge measuring device in parallel to this lead wire. Since the partial discharge is a high frequency pulse, it is prevented from flowing through the lead wire by the high frequency impedance of the lead wire. Therefore, it flows through the partial discharge meter and is measured there.
部分放電パルスの個数およびレベル基づいて絶縁体の劣
化診断が行われる。Deterioration diagnosis of the insulator is performed based on the number and level of partial discharge pulses.
〔実施例］ 以下、本発明の部分放電測定方法を詳細に説明する。〔Example] Hereinafter, the partial discharge measuring method of the present invention will be explained in detail.
第１図は本発明の第１の実施例を示し、電カケープル１
が接続部２によって接続されている。接続部２の接地端
子１１には接地線５が接続されており、接地線５には、
３個の鉄芯１２が取り付けられている。鉄芯１２は２つ
割になっているので接地線５を接地端子１１から取り外
すことなく取り付けることができる。接地線５に並列に
部分放電測定器８が接続されている電カケープル１は運
転状態にあり、絶縁体には商用周波の定格電圧が印加さ
れている。絶縁体に部分放電が発生すると金属シースに
高周波パルスが誘起し、接地端子１１に表れる。FIG. 1 shows a first embodiment of the present invention, in which an electric cable 1
are connected by the connecting part 2. A grounding wire 5 is connected to the grounding terminal 11 of the connection part 2, and the grounding wire 5 has a
Three iron cores 12 are attached. Since the iron core 12 is divided into two parts, the grounding wire 5 can be attached to the grounding terminal 11 without being removed. The power cable 1, in which the partial discharge measuring device 8 is connected in parallel to the grounding wire 5, is in operation, and the rated voltage of the commercial frequency is applied to the insulator. When a partial discharge occurs in the insulator, a high frequency pulse is induced in the metal sheath and appears at the ground terminal 11.
この高周波パルスは接地線５の高周波インピーダンスが
大きいために殆ど全てが部分放電測定器８に流入し、そ
こで測定される。接地線５に並列に測定用リード線を接
続し、そこに検出インピーダンスを挿入してその両端の
電圧を測定するようにしても良い。Since the high frequency impedance of the grounding wire 5 is large, almost all of this high frequency pulse flows into the partial discharge measuring device 8 and is measured there. A measurement lead wire may be connected in parallel to the ground wire 5, and a detection impedance may be inserted therein to measure the voltage across the lead wire.
第２図は本発明の第２の実施例を示し、Ｒ相、Ｓ相、Ｔ
相の電カケープル１が絶縁接続部２によって接続され、
各接続部２の金属シースはクロスボンド線２０によって
接続されている。尚、１３は絶縁接続部２の絶縁部分を
サージ電圧から保護するアレスターである。FIG. 2 shows a second embodiment of the present invention, in which R phase, S phase, T
A phase power cable 1 is connected by an insulated connection part 2,
The metal sheaths of each connection part 2 are connected by cross bond wires 20. Note that 13 is an arrester that protects the insulated portion of the insulated connection portion 2 from surge voltage.
部分放電を測定するときは、クロスボンド線２０に２つ
割の鉄芯２０を取り付ける。Ｔ相の部分放電を測定する
ときは、絶縁接続部２の両端に部分放電測定器８を接続
する。Ｒ相およびＳ相についても同じようにして測定す
ることができる。When measuring partial discharge, a halved iron core 20 is attached to the cross bond wire 20. When measuring T-phase partial discharge, a partial discharge measuring device 8 is connected to both ends of the insulated connection part 2. The R phase and S phase can also be measured in the same manner.
第１および第２の実施例では、接地線およびクロスボン
ド線に鉄芯を取り付けたが、ジャンパー線等に取り付け
ても良い。In the first and second embodiments, the iron core is attached to the ground wire and the cross bond wire, but it may be attached to a jumper wire or the like.
また、送電線路だけでなく、モータ、変圧器、開閉器等
の接地線に取り付けることもできる。Moreover, it can be attached not only to power transmission lines but also to grounding wires of motors, transformers, switches, etc.
更に、金属シースを情報通信媒体とする搬送波通信シス
テムにも本発明を適用することができる。Furthermore, the present invention can also be applied to a carrier wave communication system using a metal sheath as an information communication medium.
この場合、部分放電測定器のところへ受信装置を挿入す
ると、信号の受信を行うことができる。In this case, the signal can be received by inserting the receiving device into the partial discharge measuring device.
以上説明した通り、本発明の部分放電測定方法によると
、接地線等のリード線にそのまま外部より高インダクタ
ンスの鉄芯を取り付け、それと並列に部分放電測定器を
接続するようにしたため、電カケープル線路等のシステ
ムの信頼性が低下するのを防ぎ、かつ、活線状態におけ
る測定を可能にする。当然、測定作業の作業性を高める
ことができる。As explained above, according to the partial discharge measuring method of the present invention, a high inductance iron core is attached from the outside to the lead wire such as a grounding wire, and a partial discharge measuring device is connected in parallel with the lead wire. This prevents the reliability of the system from decreasing, and enables measurement under live conditions. Naturally, the workability of measurement work can be improved.
第１図および第２図は本発明の第１および第２の実施例
を示す説明図。第３図は従来の部分放電測定方法を示す
説明図。
符号の説明
１−・−一−−−−−電力ケーブル ２−・・−・
接続部３−・−・−終端部 ４・・−・−・・
・充電部５．６−−・接地線
７−・−・−検出インピーダンス
８−・−ｍ−−−・部分放電測定器
１１−・・−・−・・・接地端子 １２−−−−
・−鉄芯１３−−一−−−−−アレスターFIGS. 1 and 2 are explanatory diagrams showing first and second embodiments of the present invention. FIG. 3 is an explanatory diagram showing a conventional partial discharge measuring method. Explanation of symbols 1-・-1--Power cable 2-・・-・
Connection part 3---Terminal part 4--
・Charging part 5.6--・Grounding wire 7--・--Detection impedance 8--・-m----・Partial discharge measuring device 11--・・-- Grounding terminal 12--
・-Iron core 13--1--Arrester
Claims (3)
絶縁体の劣化診断を行う部分放電測定方法において、 前記部分放電に基づいて誘起される高周波パルスが流れ
るリード線に所定のインダクタンスを有する鉄芯をリー
ド線の外部から取り付け、 前記リード線に並列に前記高周波パルスをバイパスさせ
る測定リード線を接続して該測定リード線に流れる前記
高周波パルスを測定することを特徴とする部分放電測定
方法。(1) In a partial discharge measurement method for diagnosing deterioration of an insulator by detecting partial discharge in an insulator to which a high voltage is applied, a predetermined inductance is installed in a lead wire through which a high-frequency pulse induced based on the partial discharge flows. A partial discharge characterized in that: an iron core having an iron core is attached from the outside of the lead wire, a measurement lead wire that bypasses the high frequency pulse is connected to the lead wire in parallel, and the high frequency pulse flowing through the measurement lead wire is measured. Measuring method.
求項第１項記載の部分放電測定方法。(2) The partial discharge measuring method according to claim 1, wherein a partial discharge measuring device is inserted into the measurement lead wire.
る請求項第１項記載の部分放電測定方法。(3) The partial discharge measuring method according to claim 1, wherein a detection impedance is inserted into the measurement lead wire.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP30927388A JPH02154170A (en) | 1988-12-06 | 1988-12-06 | Measuring method for partial discharge |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP30927388A JPH02154170A (en) | 1988-12-06 | 1988-12-06 | Measuring method for partial discharge |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH02154170A true JPH02154170A (en) | 1990-06-13 |
Family
ID=17991009
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP30927388A Pending JPH02154170A (en) | 1988-12-06 | 1988-12-06 | Measuring method for partial discharge |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH02154170A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102162830A (en) * | 2011-04-02 | 2011-08-24 | 中国南方电网有限责任公司超高压输电公司梧州局 | Experimental device for simulating high-voltage transmission line flashover discharge caused by forest fire |
-
1988
- 1988-12-06 JP JP30927388A patent/JPH02154170A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102162830A (en) * | 2011-04-02 | 2011-08-24 | 中国南方电网有限责任公司超高压输电公司梧州局 | Experimental device for simulating high-voltage transmission line flashover discharge caused by forest fire |
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