JP2543902B2 - Partial discharge detector - Google Patents

Partial discharge detector

Info

Publication number
JP2543902B2
JP2543902B2 JP62200028A JP20002887A JP2543902B2 JP 2543902 B2 JP2543902 B2 JP 2543902B2 JP 62200028 A JP62200028 A JP 62200028A JP 20002887 A JP20002887 A JP 20002887A JP 2543902 B2 JP2543902 B2 JP 2543902B2
Authority
JP
Japan
Prior art keywords
gas
partial discharge
discharge detection
insulated
electromagnetic wave
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Fee Related
Application number
JP62200028A
Other languages
Japanese (ja)
Other versions
JPS6443772A (en
Inventor
高明 榊原
功 鎌田
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Toshiba Corp
Original Assignee
Tokyo Shibaura Electric Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Tokyo Shibaura Electric Co Ltd filed Critical Tokyo Shibaura Electric Co Ltd
Priority to JP62200028A priority Critical patent/JP2543902B2/en
Publication of JPS6443772A publication Critical patent/JPS6443772A/en
Application granted granted Critical
Publication of JP2543902B2 publication Critical patent/JP2543902B2/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H33/00—High-tension or heavy-current switches with arc-extinguishing or arc-preventing means
    • H01H33/02—Details
    • H01H33/26—Means for detecting the presence of an arc or other discharge

Landscapes

  • Testing Of Short-Circuits, Discontinuities, Leakage, Or Incorrect Line Connections (AREA)
  • Testing Relating To Insulation (AREA)

Description

【発明の詳細な説明】 ［発明の目的］ （産業上の利用分野） 本発明は、電力機器をコンパクトに収納したガス絶縁
開閉装置に係り、特に収納機器の信頼度確認と監視に好
適な予防保全システムに用いられる部分放電検出装置に
関するものである。DETAILED DESCRIPTION OF THE INVENTION [Industrial Application] The present invention relates to a gas-insulated switchgear in which power equipment is compactly housed, and in particular, prevention suitable for confirmation and monitoring of the reliability of the housing equipment. The present invention relates to a partial discharge detection device used in a maintenance system.

（従来の技術） 近年、用地の高騰や都市部における電力供給量の増大
に伴う変電設備の増強化の必要性から、絶縁性及び消孤
性に優れたSF6ガスを用いて、断路器、遮断器等の変電
機器を密閉容器内に収納配置し、耐環境性とKV・Ａ当た
りの据付け体積をコンパクト化した、いわゆるガス絶縁
開閉装置が普及し稼働している。(Prior art) In recent years, due to the need to strengthen substation equipment due to soaring land and increasing power supply in urban areas, SF 6 gas, which has excellent insulation and extinction properties, has been used to The so-called gas-insulated switchgear, in which transformers such as circuit breakers are housed in a closed container and the environmental resistance and the installation volume per KV · A are made compact, has become widespread and in operation.

上記の様なガス絶縁開閉装置はコンパクト化、接地タ
ンクの露出充電部の削減等、種々の利点がある反面、高
性能化に伴う保守診断の困難さ、保守修復作業時間の増
大等、容器内部に異常が生じた場合、その信頼性が著し
く低下するという欠点があった。Although the gas insulated switchgear as described above has various advantages such as downsizing and reduction of the exposed charging part of the grounding tank, it is difficult to perform maintenance diagnosis due to high performance, and the maintenance and repair work time is increased. In the case where an abnormality occurs, there is a disadvantage that the reliability is significantly reduced.

そこで、従来から、ガス絶縁開閉装置全体の信頼性の
向上を実現するために、装置の適切な設計・製作に努め
ているが、電力供給能力の質の向上の一貫として、装置
全体の信頼度確認及び監視が必要となり、その有効な手
段が種々検討されてきた。Therefore, in order to improve the reliability of the entire gas insulated switchgear, we have been striving to properly design and manufacture the device. Confirmation and monitoring are required, and various effective means have been studied.

現時点における問題点を、第４図に示した代表的なガ
ス絶縁開閉装置の配置図を参照して説明する。Problems at the present time will be described with reference to the layout diagram of the typical gas-insulated switchgear shown in FIG.

即ち、第４図に示した様に、密封圧力容器２内に避雷
器７、変成器８、接地開閉器９、断路器12、変流器17、
遮断器18、母線19が配設され、充填ガス３としてSF6ガ
スが封入され、課電部と接地電位にある密封圧力容器２
間が電気的に絶縁されている。That is, as shown in FIG. 4, a lightning arrester 7, a transformer 8, a grounding switch 9, a disconnector 12, a current transformer 17,
A circuit breaker 18 and a bus bar 19 are provided, SF 6 gas is filled as the filling gas 3, and the sealed pressure vessel 2 is at the grounding potential with the voltage applying section.
The spaces are electrically isolated.

また、密封圧力容器２内に母線19を配置するために、
絶縁スペーサ11が適当な間隔をおいて配置され、母線19
の機械的強度と絶縁耐力を保持できるように構成されて
いる。Further, in order to arrange the bus bar 19 in the sealed pressure vessel 2,
Insulating spacers 11 are placed at appropriate intervals and
It is configured to be able to maintain the mechanical strength and dielectric strength.

さらに、主回路はブッシング１を介して、断路器12、
遮断器18を経由して変圧器20に接続されている。なお、
第４図においては、１回線受電主回路を示しているが、
第４図の右側に図示していない受電主回路より断路器12
を介して変圧器20へ電力供給する場合もある。Further, the main circuit is connected via the bushing 1 to the disconnector 12,
It is connected to a transformer 20 via a circuit breaker 18. In addition,
Although FIG. 4 shows a one-line power receiving main circuit,
From the main power receiving circuit not shown on the right side of FIG.
In some cases, power is supplied to the transformer 20 via the power supply.

一方、ガス絶縁開閉装置は、配電盤15により制御さ
れ、電圧要素は変成器８により、また、電流要素は変流
器17により得られ、主回路切換や遮断操作は操作キュー
ビクル14を介して開閉器類（断路器、遮断器、接地開閉
器）の操作器13に付勢信号を与えることにより行なわれ
る。On the other hand, the gas insulated switchgear is controlled by a switchboard 15, the voltage element is obtained by a transformer 8, the current element is obtained by a current transformer 17, and the main circuit switching and cutoff operation is performed by a switchgear via an operation cubicle 14. This is performed by giving an energizing signal to an operating device 13 of a similar type (disconnector, circuit breaker, ground switch).

また、開閉器類の機械的駆動源としては、コンプレッ
サ設備16により所定の圧力（例えば15kg/cm2が一般）を
得て操作キュービクル14を介して操作器13に供給され
る。Further, as a mechanical drive source for the switches, a predetermined pressure (generally 15 kg / cm 2 for example) is obtained by the compressor equipment 16 and supplied to the operating device 13 via the operating cubicle 14.

一方、絶縁スペーサ11は、保守上の切離しや配置構成
上より、充填ガスの封入区画を行なう作用も併用させて
いるので、バルブ４を介して、SF6ガスボンベ６よりガ
スキュービクル５を介して各区画にSF6ガスを充填し、
ガスキュービクル５で圧力もわかるようにしている。On the other hand, since the insulating spacer 11 also has a function of enclosing the filled gas from the viewpoint of separation for maintenance and the arrangement configuration, the insulating spacer 11 is connected to each of the SF 6 gas cylinder 6 and the gas cubicle 5 via the valve 4. Fill the compartment with SF 6 gas,
The gas cubicle 5 also makes the pressure visible.

上記の様な構成を有する従来のガス絶縁開閉装置にお
いては、SF6ガスの特性によって、収納機器の小型化が
可能となり、全体としてコンパクト化が実現できる。
（KV・Ａ当たりの占有体積が小さくなり、設置用地の有
効な活用が図れる。） また、ガス母線を用いて２段〜３段の積み重ね構成が
可能となり、ブロック積立てとなるので、小さな面積で
大きな体積の構成がとれるという利点があった。In the conventional gas-insulated switchgear having the above-mentioned configuration, the storage device can be downsized due to the characteristics of SF 6 gas, and the overall downsizing can be realized.
(The occupying volume per KV / A becomes small, and the effective use of the installation site can be achieved.) In addition, it is possible to construct a stack of 2 to 3 tiers using gas busbars, and block laying is possible, so a small area is required. There was an advantage that a large volume structure could be taken.

さらに、密封圧力容器が接地されているので、課電中
に近接しても感電の危険はなく、塩害・風雨などによる
環境外乱因に対し、課電部が直接にさらされることがな
いので、影響を受けることはない。Furthermore, since the sealed pressure vessel is grounded, there is no danger of electric shock even when approaching during power application, and the power application unit is not directly exposed to environmental disturbances caused by salt damage, wind and rain, etc. It is not affected.

また、各種の開閉器類は、消孤能力の高いSF6ガス中
でアーク処理されるため、１主接点当たりの遮断容量の
大幅な向上が可能となるという利点もあった。Further, since various switches are subjected to arc treatment in SF 6 gas having a high extinguishing ability, there is also an advantage that the breaking capacity per main contact can be greatly improved.

一方、上述した様に利点がある反面、以下に述べる様
な欠点があった。On the other hand, while it has the advantages as described above, it has the following drawbacks.

即ち、ガス絶縁開閉装置全体をコンパクト化したこと
により、収納機器の保守・点検時に、解体作業あるいは
再組立作業の寸法制限が小さくなり、保守・点検作業に
時間がかかり、作業効率が著しく低下していた。In other words, by making the entire gas-insulated switchgear compact, the size restrictions of dismantling work or reassembly work are reduced during maintenance / inspection of storage equipment, which requires time for maintenance / inspection work and significantly reduces work efficiency. Was there.

また、容器内部に封入されるSF6ガスは高価で、外部
へのガス漏れ防止上の製作技術が高級となると共に、絶
縁性の良さからkv/mmが大きいため、ガス圧低下は絶縁
裕度に敏感に関係し、ガス漏れ修復は緊急を要するもの
となっていた。In addition, the SF 6 gas filled in the container is expensive, the manufacturing technology for preventing gas leakage to the outside is high-grade, and since the kv / mm is large due to its good insulating property, the decrease in gas pressure causes insulation margin It was urgent to repair gas leaks.

さらに、密封圧力容器を用いているため、収納機器の
目視による監視ができないという問題点があった。Further, since the sealed pressure vessel is used, there is a problem that the storage device cannot be visually monitored.

また、各種開閉機器の主接点の消耗に伴う交換作業
は、SF6ガスの回収・再充填作業に多大な時間を要し、
ガス絶縁開閉装置の停止時間が長くなるという欠点もあ
った。Also, replacement work due to exhaustion of the main contacts of various switchgear requires a great deal of time for SF 6 gas recovery and refilling work.
There is also a drawback that the gas insulation switchgear has a long down time.

以上説明した様な利点及び欠点に対して、性能的には
利点のメリットが大きいため、ガス絶縁開閉装置の普及
は目覚ましいが、設置箇所も増え、量産体制がとられる
様になると、その保守や緊急修復体制の準備と品質のば
らつきも無視できない問題となっている。In contrast to the advantages and disadvantages described above, the advantages are large in terms of performance, so the spread of gas insulated switchgear is remarkable, but when the number of installation locations increases and mass production system can be adopted, its maintenance and The preparation of the emergency repair system and the variation in quality are also issues that cannot be ignored.

その対策として、稼働運転状態が正常であることの信
頼度確認と、異常発生時の早期検出監視が可能な予防保
全システムの確立が切望されている。As a countermeasure, it is earnestly desired to establish a preventive maintenance system capable of confirming the reliability that the operating condition is normal and capable of early detection and monitoring when an abnormality occurs.

この様な予防保全システムの期待される効果につい
て、第５図を参照して説明する。Expected effects of such a preventive maintenance system will be described with reference to FIG.

即ち、第５図は、縦軸を供試品の潜在的特性Ｌ、横軸
を経過時間ｔとした時の、潜在的劣化故障モデル図であ
る。事故として現象化する過程において、ｆ点に至ると
加速度的に進展し、時間的な裕度もなく事故現象に至る
ので、ａ点〜ｅ点の警告領域Ｂで異常を発見することが
望ましい。That is, FIG. 5 is a potential deterioration failure model diagram in which the vertical axis represents the potential characteristic L of the sample and the horizontal axis represents the elapsed time t. In the process of becoming a phenomenon as an accident, it progresses at an accelerated rate at point f and reaches an accident phenomenon with no time margin. Therefore, it is desirable to detect an abnormality in the warning area B at points a to e.

その理由は、種々の異常は物理現象的に長時間かけて
進展するので、たとえ異常が発生確認されても緊急停止
などの直接緊急処置が不要で、自発的停止による修復余
裕時間から得られることと、事故現象時の１次〜２次被
害といった事故拡大現象がなく、修復箇所も必要最小限
の部位に限定できることである。The reason is that various abnormalities develop physically over a long period of time, and even if abnormalities are confirmed, direct emergency measures such as an emergency stop are not required, and it is possible to obtain from the repair margin time by voluntary stop. Then, there is no accident expansion phenomenon such as primary and secondary damage at the time of the accident phenomenon, and the repaired area can be limited to the minimum necessary area.

従って、パラメータ検出レベルの選定が重要であり、
供試品特有の故障の木（Fault Tree）解析に基づく監視
項目がポイントとなる。Therefore, it is important to select the parameter detection level,
The point is to monitor items based on the fault tree analysis specific to the sample.

これら監視項目としては、その計測値自体が急激に変
化しないコロナ量、ガス水分量、ガス成分、ガス圧力、
ガス温度、ガス密度、油面、油圧、油温、分解ガス量等
の準定常的である項目と、遮断器、断路器等の動作時間
の様に、短い時間内での処理を必要とする項目がある。These monitoring items include the amount of corona, the amount of gas moisture, the gas component, the gas pressure, which the measured value itself does not change rapidly.
It requires quasi-stationary items such as gas temperature, gas density, oil level, oil pressure, oil temperature, amount of decomposed gas, etc., and processing within a short time, such as the operating time of the circuit breaker, disconnector, etc. There is an item.

通常の監視の方法としては、後者の項目については、
機器動作時に計測を行い、データ処理・演算し、その結
果を出力、表示及び記憶し、また、前者の準定常的な項
目については、ある一定時間間隔で計測を行い、データ
を処理・演算し、その結果を出力、表示及び記憶してい
る。As for the usual monitoring method, for the latter item,
When the equipment is operating, measurement is performed, data is processed and calculated, and the results are output, displayed, and stored.For the former quasi-stationary item, measurement is performed at certain fixed time intervals and data is processed and calculated. , The result is output, displayed and stored.

この様な監視項目の中で、機器の異常を予知するとい
う観点から、最も重要なものの一つに、部分放電の検出
（コロナ検出）がある。Among such monitoring items, detection of partial discharge (corona detection) is one of the most important ones from the viewpoint of predicting device abnormality.

しかしながら、この様な部分放電の検出については、
従来より多くの検出装置が提案されているが、これらを
実際の機器に適用する場合の合理的な構成は未だ確立さ
れていない。However, regarding the detection of such partial discharge,
Although more detection devices have been proposed than in the past, a rational configuration for applying these to actual devices has not yet been established.

（発明が解決しようとする問題点） 上記の様に、従来のガス絶縁開閉装置においては、機
器の内部に発生する部分放電を検出する装置が実現され
ていなかった。(Problems to be Solved by the Invention) As described above, in the conventional gas-insulated switchgear, a device for detecting a partial discharge generated inside the device has not been realized.

そこで、本発明は以上の欠点を除去するために提案さ
れたもので、その目的は、ガス絶縁開閉装置の機器内部
に発生する部分放電を効率良く検出することができる部
分放電検出装置を提供することにある。Therefore, the present invention has been proposed in order to eliminate the above drawbacks, and an object thereof is to provide a partial discharge detection device capable of efficiently detecting a partial discharge generated inside the equipment of a gas insulated switchgear. Especially.

［発明の構成］ （問題点を解決するための手段） 本発明は、高電圧導体を絶縁性ガスと共に接地金属容
器内に収納して成る複数のガス絶縁機器により構成され
るガス絶縁開閉装置の内部に発生する部分放電を検出す
る装置において、 ガス絶縁機器と電力ケーブル等との外部接続部近傍に
電磁波の検出が可能な部分放電検出手段を配設したこと
を特徴とする。[Structure of the Invention] (Means for Solving the Problems) The present invention relates to a gas-insulated switchgear configured by a plurality of gas-insulated devices in which a high-voltage conductor is housed in a grounded metal container together with an insulating gas. An apparatus for detecting a partial discharge generated inside is characterized in that a partial discharge detection means capable of detecting an electromagnetic wave is provided in the vicinity of an external connection portion between a gas insulation device and a power cable or the like.

（作用） 本発明の部分放電検出装置においては、ケーブルヘッ
ド等の外部接続部においては絶縁箇所が存在するため、
この部分で遮蔽が破られ電磁波も外部に漏れる点を利用
して、この部分に検出手段を設置することにより、ガス
絶縁開閉装置の外部から電磁波を効率よく検出できる。(Operation) In the partial discharge detection device of the present invention, since there is an insulating portion in the external connection portion such as the cable head,
By utilizing the point that the shield is broken at this portion and the electromagnetic wave also leaks to the outside, the electromagnetic wave can be efficiently detected from the outside of the gas insulated switchgear by installing the detection means at this portion.

ガス絶縁開閉装置の各ガス絶縁機器内で発生する部分
放電がSF6ガスの放電現象に関係するため、それによる
信号が非常に高周波の電磁波となる。そして、この電磁
波は、絶縁箇所を有するケーブルヘッド等の外部接続部
近傍において遮蔽が破られることによって外部に漏れ、
ガス絶縁開閉装置の外部に配置される本発明の部分放電
検出装置によって検出される。The partial discharge that occurs in each gas-insulated switchgear equipment is related to the discharge phenomenon of SF 6 gas, and the resulting signal becomes a very high-frequency electromagnetic wave. Then, this electromagnetic wave leaks to the outside by breaking the shield in the vicinity of the external connection portion such as a cable head having an insulating portion,
It is detected by the partial discharge detection device of the present invention arranged outside the gas insulated switchgear.

なお、ガス絶縁機器と他の機器を接続する外部接続部
はGISの端部に相当し、ガス絶縁機器は外部接続部の一
方の側にのみ配置されるために、当該回線における電磁
波は、外部接続部に対して一方向から、すなわちGIS側
からのみ伝播される。Note that the external connection that connects the gas-insulated equipment to other equipment corresponds to the end of the GIS, and the gas-insulated equipment is placed only on one side of the external connection, so the electromagnetic waves on the line are It is propagated from one direction to the connection, that is, only from the GIS side.

（実施例） 以下、本発明の一実施例を第１図乃至第３図に基づい
て具体的に説明する。なお、第４図及び第５図に示した
従来型と同一の部材は同一の符号を付し説明は省略す
る。(Embodiment) An embodiment of the present invention will be specifically described below with reference to FIGS. 1 to 3. The same members as those of the conventional type shown in FIGS. 4 and 5 are designated by the same reference numerals, and the description thereof will be omitted.

＊実施例の構成＊ 本実施例においては、第１図及び第２図に示した様
に、ガス絶縁機器と電力ケーブル等との外部接続部近傍
に部分放電検出手段である電磁波検出器50が配設されて
いる。* Structure of Embodiment * In this embodiment, as shown in FIGS. 1 and 2, an electromagnetic wave detector 50, which is a partial discharge detection means, is provided in the vicinity of an external connection between a gas-insulated device and a power cable or the like. It is arranged.

即ち、ガス絶縁開閉装置の一般的な機器の配置構成
は、主母線31に断路器32が接続され、断路器32には遮断
器33が接続され、さらに、変流器40を介して断路器34、
接地装置35が接続され、計器用変成器41及びケーブルヘ
ッド36を介して外部に引き出されている。そして、ケー
ブルヘッド36と電力ケーブル43の接続部には絶縁筒42が
配設され、その近傍に電磁波検出器50が配設されてい
る。That is, the general equipment layout of the gas insulated switchgear is such that the main bus 31 is connected to the disconnector 32, the disconnector 32 is connected to the circuit breaker 33, and further, the disconnector is connected via the current transformer 40. 34,
A grounding device 35 is connected and is drawn out to the outside via an instrument transformer 41 and a cable head 36. An insulating tube 42 is arranged at the connection between the cable head 36 and the power cable 43, and an electromagnetic wave detector 50 is arranged in the vicinity thereof.

また、前記電磁波検出器50としては、一例として第３
図に示した様なものが用いられる。即ち、電磁波を検出
するループアンテナ51にフィルタ52が接続され、さら
に、増幅回路53、ピークディテクタ積分回路54、E/O変
換器55を介して、光ケーブル57に接続されている。The electromagnetic wave detector 50 is, for example, a third
The one shown in the figure is used. That is, the filter 52 is connected to the loop antenna 51 that detects electromagnetic waves, and is further connected to the optical cable 57 via the amplification circuit 53, the peak detector integration circuit 54, and the E / O converter 55.

＊実施例の作用＊ この様な構成を有する本実施例の部分放電検出システ
ムは次の様に作用する。* Operation of Embodiment * The partial discharge detection system of this embodiment having such a structure operates as follows.

即ち、一般に、ガス絶縁機器の内部に発生する部分放
電は、その立上がり数nsというSF6ガスの放電現象に関
係しているため、それにより発生する信号も数10MHzか
ら数GHzにまで及ぶ電磁波となる。この様に、機器の内
部部分放電により発生した電磁波は非常に高周波である
ため、ガス絶縁機器自体が一種の導波管の役割を果し、
電磁波は接地金属容器内を伝播するので、この様な電気
波の信号を検出すれば機器内部の部分放電の有無を判定
することができる。That is, in general, the partial discharge that occurs inside the gas-insulated equipment is related to the discharge phenomenon of SF 6 gas, which has a rise of several ns, so the signal generated by it is also an electromagnetic wave that extends from several tens of MHz to several GHz. Become. In this way, the electromagnetic waves generated by the internal partial discharge of the equipment are extremely high frequency, so the gas-insulated equipment itself plays the role of a kind of waveguide,
Since the electromagnetic wave propagates in the grounded metal container, the presence or absence of partial discharge inside the device can be determined by detecting such an electric wave signal.

しかし、ガス絶縁機器の高圧充電部は接地金属容器で
完全に覆われているため、上記の様な電磁波は外部に出
ないが、ケーブルヘッド等の外部接続部等においては、
接地金属容器と電力ケーブル等の間に絶縁筒が配設され
る等、絶縁箇所が存在し、遮蔽が破れるため、電磁波も
外部に漏れ出てくる。これは、ガス絶縁機器の接地金属
容器に絶縁部が存在すると、ガス絶縁機器の内部インピ
ーダンス、絶縁筒部のインピーダンス、接地金属容器の
外部インピーダンス等の比率から、電磁波が外部に漏洩
するためである。However, since the high-voltage charging part of the gas-insulated equipment is completely covered by the grounded metal container, the electromagnetic waves as described above do not go out, but in the external connection part such as the cable head,
Since there is an insulating portion such as an insulating cylinder provided between the grounded metal container and the power cable, the shielding is broken, and electromagnetic waves also leak to the outside. This is because if the grounded metal container of the gas-insulated device has an insulating portion, electromagnetic waves leak to the outside due to the ratio of the internal impedance of the gas-insulated device, the impedance of the insulating cylinder, and the external impedance of the grounded metal container. .

従って、本実施例に示した様に、この様な外部接続部
に電磁波検出器を配設すれば、ガス絶縁機器の内部に発
生した部分放電を直ちに検出することができる。Therefore, as shown in the present embodiment, by disposing the electromagnetic wave detector in such an external connection portion, it is possible to immediately detect the partial discharge generated inside the gas insulated device.

また、ガス絶縁機器の各回線の外部接続部に電磁波検
出器を配設すれば、各回線単位に内部異常を監視するこ
とができ、異常が発見された場合も、その回線のみを停
止すれば良く、保守・点検作業の効率化が計れる。In addition, if an electromagnetic wave detector is installed at the external connection of each line of the gas-insulated equipment, it is possible to monitor internal abnormalities on a line-by-line basis. Good and efficient maintenance and inspection work.

また、上記の様な電磁波検出器を各回線の外部接続部
に設置すれば、その回線の充電部についてはすべて監視
することができ、配設する検出器の数も大幅に低減する
ことができる。Further, if the electromagnetic wave detector as described above is installed in the external connection part of each line, all the charging parts of that line can be monitored, and the number of detectors to be installed can be greatly reduced. .

＊他の実施例＊ なお、本発明は上述した実施例に限定されるものでは
なく、上記の様な接地金属容器の遮蔽は、気中ブッシン
グ部においてもケーブルヘッド部と同様に破れるので、
気中ブッシッグ部近傍に同様の電磁波検出器を配設して
も、機器内部に発生する部分放電を効率良く検出するこ
とができる。* Other Examples * Note that the present invention is not limited to the above-described examples, and the shielding of the grounded metal container as described above is broken in the air bushing portion as in the cable head portion.
Even if a similar electromagnetic wave detector is provided near the air bushig part, the partial discharge generated inside the device can be efficiently detected.

また、上述した様な部分放電検出装置は、ガス絶縁機
器が鉄筋建屋内、又は、地下室に設置されている場合、
特に有効である。これは、放送電波等の外部ノイズが多
く存在する気中に比較して、鉄筋建屋や地下室では、そ
れらが一種のシールドルームとしての役割を果すので、
外部ノイズが著しく低減でき、精度の良い内部部分放電
の監視が可能となる。Further, the partial discharge detection device as described above, when the gas insulation device is installed in the rebar building, or in the basement,
Especially effective. This is because in the rebar building and basement, they play a role as a kind of shielded room, compared to the atmosphere where there are many external noises such as broadcast radio waves.
External noise can be significantly reduced, and accurate internal partial discharge can be monitored.

［発明の効果］ 以上述べた様に、本発明によれば、接地金属容器内に
収納されたガス絶縁機器と電力ケーブル等との外部接続
部近傍に、電磁波検出器等の部分放電検出手段を配設す
るという簡単な手段によって、ガス絶縁開閉装置の機器
内部に発生する部分放電を効率良く検出することができ
る部分放電検出装置を提供することができる。[Advantages of the Invention] As described above, according to the present invention, a partial discharge detection means such as an electromagnetic wave detector is provided in the vicinity of an external connection portion between a gas insulated device housed in a grounded metal container and a power cable or the like. It is possible to provide a partial discharge detection device capable of efficiently detecting the partial discharge generated inside the equipment of the gas insulated switchgear by a simple means of disposing.

すなわち、外部接続部はガス絶縁機器と他の機器を接
続するものであってGISの端部に相当し、ガス絶縁機器
は一方の側にのみ配置されるものである。よって、本発
明の部分放電検出手段が設置された回線において発生し
た部分放電による電磁波は、外部接続部に対してGIS側
である一方からしか伝播されてこない。したがって、本
発明によって検出される電磁波の方向に狂いがないとい
う効果がある。That is, the external connection portion connects the gas-insulated device and another device, and corresponds to the end of the GIS, and the gas-insulated device is arranged only on one side. Therefore, the electromagnetic waves due to the partial discharge generated in the line in which the partial discharge detecting means of the present invention is installed are propagated only from the GIS side to the external connection portion. Therefore, there is an effect that there is no deviation in the direction of the electromagnetic wave detected by the present invention.

また、隣接回線にて発生した電磁波は、本発明の外部
接続部近傍に配設された部分放電検出手段の付近に到達
するまでの伝播過程において減衰してしまうため、本発
明の部分放電検出手段は、当該回線において発生した電
磁波を効率良く且つ正確に検出することができる。Further, the electromagnetic waves generated in the adjacent line are attenuated in the propagation process until reaching the vicinity of the partial discharge detecting means arranged in the vicinity of the external connection portion of the present invention, so the partial discharge detecting means of the present invention Can detect the electromagnetic wave generated in the line efficiently and accurately.

さらに、本発明の部分放電検出装置は、各回線ごとの
外部接続部近傍において、ただ１つ配置すれば良いた
め、配設すべき部分放電検出装置の個数を大幅に低減す
ることができる。Furthermore, since the partial discharge detection device of the present invention only needs to be arranged in the vicinity of the external connection portion for each line, the number of partial discharge detection devices to be arranged can be greatly reduced.

【図面の簡単な説明】[Brief description of drawings]

第１図及び第２図は、本発明の部分放電検出装置の一実
施例を示す機器の配置構成図、第３図は本発明の部分放
電検出装置に用いられる検出器の一例を示す構成図、第
４図は一般的なガス絶縁開閉装置の配置構成図、第５図
は予防保全システムによる効果を示す概念図である。 １……ブッシング、２……密封圧力容器、３……充填ガ
ス、４……バルブ、５……ガスキュービクル、６……ガ
スボンベ、７……避雷器、８……変成器、９……接地開
閉器、11……絶縁スペーサ、12……断路器、13……操作
器、14……キュービクル、15……配電盤、16……コンプ
レッサ設備、17……変流器、18……遮断器、19……母
線、20……変圧器、31……主母線、32……断路器、33…
…遮断器、34……断路器、35……接地装置、36……ケー
ブルヘッド、40……変流器、41……計器用変成器、42…
…絶縁筒、43……電力ケーブル、50……電磁波検出器。FIG. 1 and FIG. 2 are arrangement layout diagrams of equipment showing an embodiment of the partial discharge detection device of the present invention, and FIG. 3 is a configuration diagram showing an example of a detector used in the partial discharge detection device of the present invention. , FIG. 4 is a layout configuration diagram of a general gas insulated switchgear, and FIG. 5 is a conceptual diagram showing an effect of the preventive maintenance system. 1 ... Bushing, 2 ... Sealed pressure vessel, 3 ... Filling gas, 4 ... Valve, 5 ... Gas cubicle, 6 ... Gas cylinder, 7 ... Lightning arrester, 8 ... Transformer, 9 ... Grounding open / close Switch, 11 ... Insulating spacer, 12 ... Disconnector, 13 ... Operator, 14 ... Cubicle, 15 ... Switchboard, 16 ... Compressor equipment, 17 ... Current transformer, 18 ... Circuit breaker, 19 ...... Bus, 20 ...... Transformer, 31 ...... Main bus, 32 ...... Disconnector, 33 ...
… Circuit breaker, 34… Disconnector, 35… Grounding device, 36… Cable head, 40… Current transformer, 41… Instrument transformer, 42…
… Insulation cylinder, 43 …… Power cable, 50 …… Electromagnetic wave detector.

───────────────────────────────────────────────────── フロントページの続き (56)参考文献 特開 昭61−167880（ＪＰ，Ａ) 特開 昭55−27903（ＪＰ，Ａ) 特開 昭49−46780（ＪＰ，Ａ) 特開 昭59−139815（ＪＰ，Ａ) 実開 昭55−51775（ＪＰ，Ｕ) 実開 昭59−117038（ＪＰ，Ｕ) 特公 昭58−30555（ＪＰ，Ｂ２) 特公 昭60−16163（ＪＰ，Ｂ２) ─────────────────────────────────────────────────── --- Continuation of the front page (56) References JP-A-61-167880 (JP, A) JP-A-55-27903 (JP, A) JP-A-49-46780 (JP, A) JP-A-59- 139815 (JP, A) Actually open 55-51775 (JP, U) Actually open 59-117038 (JP, U) Japanese public Sho 58-30555 (JP, B2) Japanese public Sho 60-16163 (JP, B2)

Claims (3)

(57)【特許請求の範囲】(57) [Claims] 【請求項１】高電圧導体を絶縁性ガスと共に接地金属容
器内に収納して成る複数のガス絶縁機器により構成され
るガス絶縁開閉装置の内部に発生する部分放電を検出す
る装置であって、 ガス絶縁機器と電力ケーブル等との外部接続部近傍に電
磁波の検出が可能な部分放電検出手段を配設したことを
特徴とする部分放電検出装置。1. A device for detecting a partial discharge generated inside a gas-insulated switchgear constituted by a plurality of gas-insulated equipment, which comprises a high-voltage conductor and an insulating gas housed in a grounded metal container. A partial discharge detection device comprising a partial discharge detection means capable of detecting an electromagnetic wave in the vicinity of an external connection portion between a gas insulation device and an electric power cable or the like. 【請求項２】前記ガス絶縁開閉装置が、鉄筋建屋内又は
地下室に設置されたものである特許請求の範囲第１項記
載の部分放電検出装置。2. The partial discharge detection device according to claim 1, wherein the gas-insulated switchgear is installed in a rebar building or a basement. 【請求項３】前記部分放電検出手段が、検出用アンテナ
を設置したものである特許請求の範囲第１項又は第２項
記載の部分放電検出装置。3. The partial discharge detection device according to claim 1 or 2, wherein the partial discharge detection means is provided with a detection antenna.
JP62200028A 1987-08-12 1987-08-12 Partial discharge detector Expired - Fee Related JP2543902B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP62200028A JP2543902B2 (en) 1987-08-12 1987-08-12 Partial discharge detector

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP62200028A JP2543902B2 (en) 1987-08-12 1987-08-12 Partial discharge detector

Publications (2)

Publication Number Publication Date
JPS6443772A JPS6443772A (en) 1989-02-16
JP2543902B2 true JP2543902B2 (en) 1996-10-16

Family

ID=16417616

Family Applications (1)

Application Number Title Priority Date Filing Date
JP62200028A Expired - Fee Related JP2543902B2 (en) 1987-08-12 1987-08-12 Partial discharge detector

Country Status (1)

Country Link
JP (1) JP2543902B2 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2744510B2 (en) * 1990-04-06 1998-04-28 日新電機株式会社 Insulation monitoring device for gas insulated switchgear

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4946780A (en) * 1972-09-07 1974-05-04
JPS5527903A (en) * 1978-08-18 1980-02-28 Daihen Corp Method and unit for indicating partialy discharging position of electric apparatus
JPS5826387Y2 (en) * 1978-10-02 1983-06-07 株式会社明電舎 Corona detection device for electrical equipment
JPS5830555A (en) * 1981-07-21 1983-02-23 Toyota Motor Corp System for controlling automatic speed change gear for vehicle
JPS59139815A (en) * 1983-01-26 1984-08-10 株式会社　富士電機総合研究所 Insulating spacer containing partial discharge detecting element
JPS59117038U (en) * 1983-01-28 1984-08-07 株式会社東芝 vacuum valve
JPS61167880A (en) * 1985-01-21 1986-07-29 Hitachi Ltd Measuring instrument for partial discharge

Also Published As

Publication number Publication date
JPS6443772A (en) 1989-02-16

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