JPH0230672B2 - KINZOKUSHIISUTSUKIKAKYOHORIECHIRENZETSUENDENRYOKUKEEBURUNIOKERUBUBUNHODENNOBUIOSUITEISURUHOHO - Google Patents
KINZOKUSHIISUTSUKIKAKYOHORIECHIRENZETSUENDENRYOKUKEEBURUNIOKERUBUBUNHODENNOBUIOSUITEISURUHOHOInfo
- Publication number
- JPH0230672B2 JPH0230672B2 JP21521382A JP21521382A JPH0230672B2 JP H0230672 B2 JPH0230672 B2 JP H0230672B2 JP 21521382 A JP21521382 A JP 21521382A JP 21521382 A JP21521382 A JP 21521382A JP H0230672 B2 JPH0230672 B2 JP H0230672B2
- Authority
- JP
- Japan
- Prior art keywords
- cable
- discharge
- cable core
- gas
- layer
- 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 - Lifetime
Links
- 239000007789 gas Substances 0.000 claims description 15
- 229910052751 metal Inorganic materials 0.000 claims description 10
- 239000002184 metal Substances 0.000 claims description 10
- 229920003020 cross-linked polyethylene Polymers 0.000 claims description 5
- 239000004703 cross-linked polyethylene Substances 0.000 claims description 5
- 238000000034 method Methods 0.000 claims description 5
- 238000000354 decomposition reaction Methods 0.000 claims description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 2
- 229910018503 SF6 Inorganic materials 0.000 claims description 2
- 229910001873 dinitrogen Inorganic materials 0.000 claims description 2
- 239000000203 mixture Substances 0.000 claims description 2
- SFZCNBIFKDRMGX-UHFFFAOYSA-N sulfur hexafluoride Chemical compound FS(F)(F)(F)(F)F SFZCNBIFKDRMGX-UHFFFAOYSA-N 0.000 claims description 2
- 229960000909 sulfur hexafluoride Drugs 0.000 claims description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 11
- 229910052782 aluminium Inorganic materials 0.000 description 10
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 10
- 238000009413 insulation Methods 0.000 description 8
- 239000004744 fabric Substances 0.000 description 7
- 239000004020 conductor Substances 0.000 description 4
- 230000006378 damage Effects 0.000 description 4
- 229910002091 carbon monoxide Inorganic materials 0.000 description 2
- 230000015556 catabolic process Effects 0.000 description 2
- 230000001066 destructive effect Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000005674 electromagnetic induction Effects 0.000 description 2
- 229930195733 hydrocarbon Natural products 0.000 description 2
- 150000002430 hydrocarbons Chemical class 0.000 description 2
- 230000007774 longterm Effects 0.000 description 2
- 125000000391 vinyl group Chemical group [H]C([*])=C([H])[H] 0.000 description 2
- 229920002554 vinyl polymer Polymers 0.000 description 2
- 238000004804 winding Methods 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 239000004215 Carbon black (E152) Substances 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 230000008602 contraction Effects 0.000 description 1
- 238000004817 gas chromatography Methods 0.000 description 1
- 230000001771 impaired effect Effects 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 239000011800 void material Substances 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M3/00—Investigating fluid-tightness of structures
- G01M3/02—Investigating fluid-tightness of structures by using fluid or vacuum
- G01M3/04—Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point
- G01M3/20—Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point using special tracer materials, e.g. dye, fluorescent material, radioactive material
- G01M3/22—Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point using special tracer materials, e.g. dye, fluorescent material, radioactive material for pipes, cables or tubes; for pipe joints or seals; for valves; for welds; for containers, e.g. radiators
- G01M3/221—Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point using special tracer materials, e.g. dye, fluorescent material, radioactive material for pipes, cables or tubes; for pipe joints or seals; for valves; for welds; for containers, e.g. radiators for cables
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Testing Relating To Insulation (AREA)
- Testing Of Devices, Machine Parts, Or Other Structures Thereof (AREA)
Description
【発明の詳細な説明】
本発明は、金属シース付き架橋ポリエチレン絶
縁電力ケーブル（以下「CAZVケーブル」とい
う。）における部分放電の部位を推定する方法に
関するものである。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for estimating the location of partial discharge in a metal-sheathed cross-linked polyethylene insulated power cable (hereinafter referred to as "CAZV cable").
電力ケーブル系統における破壊事故は、即、送
電停止に繋がり、従つて、この事故が一度発生す
ると大きな社会的損害を被り兼ねない。従つて、
上記事故は、これを事前に発見し、その対策を溝
じてこれを未然に防止することが極めて重要とな
る。 A destructive accident in a power cable system immediately leads to a power outage, and therefore, once this accident occurs, it can cause great social damage. Therefore,
It is extremely important to discover the above-mentioned accidents in advance and take countermeasures to prevent them from occurring.
しかし、従来、電力ケーブル系統における破壊
事故発生の検出あるいはその位置の測定と云つた
内容の提案は数多く出されているものの、上記事
故を事前に検知すると云つた提案となるとあまり
ない。 However, although many proposals have been made to detect the occurrence of destructive accidents in power cable systems or to measure their positions, there have been few proposals for detecting such accidents in advance.
ところで通常電力ケーブルは、当初、ケーブル
コアの内部の電気的弱点箇所を起点として部分放
電が起こり、この部分放電によりケーブル絶縁層
が浸食を受けて、最後に絶縁破壊へと至らしめら
れることは知るところである。 By the way, it is known that in normal power cables, partial discharge initially occurs at electrical weak points inside the cable core, and this partial discharge causes the cable insulation layer to erode, eventually leading to dielectric breakdown. By the way.
そこで、本発明者らは、電力ケーブルにおける
部分放電発生の事実を早期に検知出来れば、電力
ケーブルの破壊事故を事前に発見出来ると言う点
に鑑み、鋭意研究に努めた結果、CAZVケーブル
の部分放電時には或る特定のガスが発生している
ことを突き止めた。 Therefore, the inventors of the present invention have conducted extensive research and found that if the fact that partial discharge occurs in a power cable can be detected early, it is possible to discover a power cable destruction accident in advance. It was discovered that a certain gas is generated during discharge.
また、CAZVケーブルにおいて部分放電の可能
性がある部位は、ケーブルコア内部（即ち、ケー
ブル絶縁層内およびケーブル絶縁層と静電遮蔽用
半導電層との界面）か、あるいはケーブルコアと
金属シースとの間のいずれかであるが、前の部位
で部分放電が起こつた場合と後の部位で部分放電
が起こつた場合とでは発生するガスに違いがある
ことも分かつた。 In addition, in CAZV cables, the areas where partial discharge is likely to occur are inside the cable core (i.e., inside the cable insulation layer and at the interface between the cable insulation layer and the electrostatic shielding semiconductive layer) or between the cable core and the metal sheath. However, it was also found that there is a difference in the gas generated when a partial discharge occurs at an earlier location and when a partial discharge occurs at a later location.
本発明は、以上の知見に基づいて為されたもの
である。 The present invention has been made based on the above findings.
本発明の目的は、CAZVケーブルにおける部分
放電を早期に検知すると共に、当該放電がCAZV
ケーブルの絶縁性能に直接影響を与えるケーブル
コア内部でのものか、あるいはCAZVケーブルの
絶縁性能に直接影響を与えないケーブルコアと金
属シース相互間でのものかを推定し得る方法を提
供することにある。 The purpose of the present invention is to detect partial discharges in CAZV cables at an early stage, and to detect partial discharges in CAZV cables.
To provide a method for estimating whether the problem is inside the cable core, which directly affects the insulation performance of the cable, or between the cable core and metal sheath, which does not directly affect the insulation performance of the CAZV cable. be.
すなわち、本発明は、金属シースとケーブルコ
アとの間に、空気、窒素ガス（N2）、六弗化硫黄
ガス（SF6）等のガス体が充填してある状態下で
発生した部分放電による分解生成ガスの組成を分
析して当該放電がケーブルコアの内部で発生した
ものか、あるいはケーブルコアと金属シース相互
間で発生してものかを推定するものである。更に
詳述すれば、上述の放電がケーブルコア内部での
ものであれば、CO、CO2、O3、N2等の酸素を含
むガスの他にCH4、C2H6等の炭化水素系のガス
が発生し、また上述の放電がケーブルコアと金属
シース相互間でのものであれば炭化水素系のガス
は発生しないはずであるので、部分放電により発
生した分解生成ガスをガスクロマトグラフイーに
より抽出・分析して、当該放電の有無を検出し且
つその部位を推定するものである。 That is, the present invention deals with partial discharge that occurs when a gas such as air, nitrogen gas (N 2 ), sulfur hexafluoride gas (SF 6 ), etc. is filled between the metal sheath and the cable core. The composition of the decomposed gas is analyzed to estimate whether the discharge occurred inside the cable core or between the cable core and the metal sheath. More specifically, if the above-mentioned discharge occurs inside the cable core, in addition to oxygen-containing gases such as CO, CO 2 , O 3 , and N 2 , hydrocarbons such as CH 4 and C 2 H 6 If the above-mentioned discharge occurs between the cable core and the metal sheath, hydrocarbon gas should not be generated. The discharge is extracted and analyzed to detect the presence or absence of the discharge and estimate its location.
次に添付の図面により本発明の一実施例を説明
する。 Next, an embodiment of the present invention will be described with reference to the accompanying drawings.
まず、図はCAZVケーブルの断面構造を示し、
１はケーブル導体、２は内部半導電層、３は架橋
ポリエチレン絶縁層、４は外部半導電層、５はク
ツシヨン層、６は特殊銅線織込み布テープ巻層で
あつて、ここまでを総称してケーブルコア７とい
う。８は上記ケーブルコア７上に所定の空隙９を
解して設けられた波付きアルミニウムシース、１
０はビニル防食層である。 First, the figure shows the cross-sectional structure of the CAZV cable,
1 is a cable conductor, 2 is an internal semi-conductive layer, 3 is a cross-linked polyethylene insulating layer, 4 is an external semi-conductive layer, 5 is a cushion layer, and 6 is a special copper wire woven cloth tape wrapping layer; It is called Cable Core 7. 8 is a corrugated aluminum sheath provided on the cable core 7 through a predetermined gap 9;
0 is a vinyl anticorrosion layer.
さて、以上のようにして構成されるCAZVケー
ブルにおいて、放電が起こる恐れのある典型的な
箇所を示すと、その一つは図中１１で示される位
置で特殊銅線織込布テープ巻層６の銅線と（図示
しない。）とアルミニウムシース８相互間で起こ
る金属電極間放電である。ここで放電が生じる原
因としては特殊銅線織込布中の銅線が長期のケー
ブルコア７の伸縮により摩耗切断して銅線の電気
的な導通性が損なわれて切断点の微小間隙におい
て銅線相互間で放電が生じるか、あるいは切断に
より銅線と近接したアルミニウムシース８相互間
で放電が生じることが考えられる。 Now, in the CAZV cable constructed as described above, typical locations where electrical discharge may occur are shown. One of them is the special copper wire woven cloth tape wrapping layer 6 at the position indicated by 11 in the figure. This is a discharge between metal electrodes that occurs between the copper wire (not shown) and the aluminum sheath 8. The reason why the discharge occurs is that the copper wire in the special copper wire woven cloth is worn out and cut due to the long-term expansion and contraction of the cable core 7, and the electrical conductivity of the copper wire is impaired. It is conceivable that discharge occurs between the wires or between the aluminum sheaths 8 that are close to the copper wire due to cutting.
また、特殊銅線織込布テープ巻層６が健全であ
つてもアルミニウムシース８との間の空隙３が大
きすぎるためにその間の電位差が大きくなり放電
を生じることが考えられる。この電位差が生じる
原因としては通常の運転電圧による対地静電容量
での充電電流での電位差発生によるもの、導体通
電電流により電磁誘導での電位差発生によるも
の、サージ性導体電流による電磁誘導での電位差
発生によるもの、絶縁層へのサージ性電圧による
電位差発生によるもの等が考えられる。この特殊
銅線織込布テープ巻層６とアルミニウムシース８
間の位置１１は、ケーブルの長さ方向にかなりの
長さで生じることが考えられ、特にケーブルが垂
直に布設される場合、曲がり部等において可能性
が大きい。 Further, even if the special copper wire woven cloth tape winding layer 6 is sound, the gap 3 between it and the aluminum sheath 8 is too large, so that the potential difference therebetween becomes large, which may cause discharge. The causes of this potential difference are the potential difference generated by the charging current in the ground capacitance due to the normal operating voltage, the potential difference generated by electromagnetic induction due to conductor current, and the potential difference generated by electromagnetic induction due to surge conductor current. Possible causes include the generation of such damage, and the generation of a potential difference due to a surge voltage applied to the insulating layer. This special copper wire woven cloth tape winding layer 6 and aluminum sheath 8
The intermediate position 11 is likely to occur over a considerable length in the length direction of the cable, particularly at bends and the like when the cable is laid vertically.
このような原因で特殊銅線織込布テープ巻層６
とアルミニウムシース８間で放電が生じると、こ
の空隙の充填ガス、例えばN2、O2、SF6、H2O
等の分解生成ガスとしてO3、H2、NOx、SO2、
F2、SOF2、HF等が生じる。 Due to this reason, special copper wire woven cloth tape wrapping layer 6
When a discharge occurs between the aluminum sheath 8 and the aluminum sheath 8, the filling gas in this gap, such as N 2 , O 2 , SF 6 , H 2 O
Decomposition gases such as O 3 , H 2 , NO x , SO 2 ,
F 2 , SOF 2 , HF, etc. are generated.
放電が起こるもう一つの位置は、図中１２で示
される絶縁層３中で、この部分での放電の場合架
橋ポリエチレンの主成分の一つである炭素を含む
ガスが分解生成する。すなわち、CO、CO2、
CH4、C2H6等のガスが生成する。 Another location where discharge occurs is in the insulating layer 3, indicated by 12 in the figure, where a gas containing carbon, which is one of the main components of crosslinked polyethylene, is decomposed and produced. i.e. CO, CO2 ,
Gases such as CH 4 and C 2 H 6 are generated.
そこで、上記の分解生成ガスをCAZVケーブル
の一端から採取し、これをガスクロマトグラフイ
ーにより抽出・分析して、当該ケーブルにおける
部分放電の有無、ならびにその放電がCAZVケー
ブルの絶縁性能に直ちに直接影響を与えるケーブ
ルコア内部、つまり位置１２でのものか、あるい
は直ちには影響を与えないケーブルコアとアルミ
ニウムシース相互間でのものかを推定する。 Therefore, we collected the above decomposition gas from one end of the CAZV cable and extracted and analyzed it using gas chromatography to determine the presence or absence of partial discharge in the cable, and whether the discharge directly affected the insulation performance of the CAZV cable. It is estimated whether the effect is inside the cable core, that is, at position 12, or between the cable core and the aluminum sheath, which has no immediate effect.
なお、本実施例では、金属シースとして、アル
ミニウムシースを用いたケーブルの場合について
説明したが、他のもの例えばステンレスシース、
鉛シース等を用いた場合にも適用できることは言
うまでもない。 In this example, the cable uses an aluminum sheath as the metal sheath, but other cables such as stainless steel sheath,
Needless to say, this method can also be applied to cases where a lead sheath or the like is used.
さて、このように、電力ケーブルにおける部分
放電の検知が可能となつたことで、当該ケーブル
の破壊事故を未然に防止できる。しかも上記放電
の部位の推定が可能となつたことでそれに適した
対処ができる。つまりケーブルコアとシース間の
放電であれば直ちに絶縁破壊に至ることはまれで
あり、長期的な対策が可能になる。一方、ケーブ
ルコア内部の放電であれば絶縁性能に重大な影響
が生じる恐れがあるので対策に緊急を要すること
になる。 Now, as it has become possible to detect partial discharges in power cables, it is possible to prevent damage to the cables. Moreover, since it is now possible to estimate the location of the discharge, appropriate measures can be taken. In other words, a discharge between the cable core and sheath rarely leads to immediate dielectric breakdown, making it possible to take long-term countermeasures. On the other hand, if there is a discharge inside the cable core, there is a risk that the insulation performance will be seriously affected, so countermeasures are urgently required.
以上のように本発明は、従来、未解決であつた
電力ケーブルにおける部分放電の検知および部分
放電の部位の推定を可能ならしめるものであり、
したがつてその工業的価値は極めて大きいと言え
る。 As described above, the present invention makes it possible to detect partial discharges in power cables and estimate the location of partial discharges, which have been unsolved in the past.
Therefore, it can be said that its industrial value is extremely large.
図は、本発明の一例を実施するに当たつて用い
られたCAZVケーブルの断面図である。
１：ケーブル導体、２：内部半導電層、３：架
橋ポリエチレン絶縁層、４：外部半導電層、５：
クツシヨン層、６：特殊銅線織込布テープ巻層、
７：ケーブルコア、８：波付きアルミニウムシー
ス、９：空隙、１０：ビニル防食層、１１，１
２：部分放電の部位。
The figure is a cross-sectional view of a CAZV cable used in implementing an example of the present invention. DESCRIPTION OF SYMBOLS 1: Cable conductor, 2: Inner semiconducting layer, 3: Crosslinked polyethylene insulation layer, 4: Outer semiconducting layer, 5:
Cushion layer, 6: special copper wire woven cloth tape wrapping layer,
7: cable core, 8: corrugated aluminum sheath, 9: void, 10: vinyl anticorrosion layer, 11,1
2: Site of partial discharge.
Claims (1)
素ガス、六弗化硫黄ガス等のガス体が充填してあ
る状態下で発生した部分放電による分解生成ガス
の組成を分析して当該放電が金属シートとケーブ
ルコア間で発生したものかあるいはケーブルコア
の内部で発生したものかを推定することを特徴と
する金属シース付き架橋ポリエチレン絶縁電力ケ
ーブルにおける部分放電の部位を推定する方法。1 Analyzing the composition of gas produced by decomposition due to a partial discharge that occurs when a gas such as air, nitrogen gas, or sulfur hexafluoride gas is filled between the metal sheath and the cable core, it is determined that the discharge is caused by metal. A method for estimating the location of a partial discharge in a crosslinked polyethylene insulated power cable with a metal sheath, the method comprising estimating whether the partial discharge occurs between the sheet and the cable core or inside the cable core.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP21521382A JPH0230672B2 (en) | 1982-12-08 | 1982-12-08 | KINZOKUSHIISUTSUKIKAKYOHORIECHIRENZETSUENDENRYOKUKEEBURUNIOKERUBUBUNHODENNOBUIOSUITEISURUHOHO |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP21521382A JPH0230672B2 (en) | 1982-12-08 | 1982-12-08 | KINZOKUSHIISUTSUKIKAKYOHORIECHIRENZETSUENDENRYOKUKEEBURUNIOKERUBUBUNHODENNOBUIOSUITEISURUHOHO |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS59105538A JPS59105538A (en) | 1984-06-18 |
| JPH0230672B2 true JPH0230672B2 (en) | 1990-07-09 |
Family
ID=16668564
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP21521382A Expired - Lifetime JPH0230672B2 (en) | 1982-12-08 | 1982-12-08 | KINZOKUSHIISUTSUKIKAKYOHORIECHIRENZETSUENDENRYOKUKEEBURUNIOKERUBUBUNHODENNOBUIOSUITEISURUHOHO |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0230672B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106291272A (en) * | 2016-07-22 | 2017-01-04 | 中国科学院电工研究所 | A kind of high voltage switch cabinet fault monitoring device |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4675474A (en) * | 1985-09-04 | 1987-06-23 | Harvey Hubbell Incorporated | Reinforced electrical cable and method of forming the cable |
-
1982
- 1982-12-08 JP JP21521382A patent/JPH0230672B2/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106291272A (en) * | 2016-07-22 | 2017-01-04 | 中国科学院电工研究所 | A kind of high voltage switch cabinet fault monitoring device |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS59105538A (en) | 1984-06-18 |
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