JPH01284775A - Corona sound detecting device for insulator - Google Patents
Corona sound detecting device for insulatorInfo
- Publication number
- JPH01284775A JPH01284775A JP11261188A JP11261188A JPH01284775A JP H01284775 A JPH01284775 A JP H01284775A JP 11261188 A JP11261188 A JP 11261188A JP 11261188 A JP11261188 A JP 11261188A JP H01284775 A JPH01284775 A JP H01284775A
- Authority
- JP
- Japan
- Prior art keywords
- corona
- sound
- insulator
- resonator
- corona sound
- 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
- 239000012212 insulator Substances 0.000 title claims abstract description 42
- 239000000284 extract Substances 0.000 claims abstract description 3
- 230000005540 biological transmission Effects 0.000 claims description 12
- 238000001514 detection method Methods 0.000 claims description 12
- 230000006866 deterioration Effects 0.000 abstract description 6
- 230000035945 sensitivity Effects 0.000 abstract description 4
- 238000009413 insulation Methods 0.000 description 6
- 229910000831 Steel Inorganic materials 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 238000010292 electrical insulation Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 230000001902 propagating effect Effects 0.000 description 3
- 239000010959 steel Substances 0.000 description 3
- 238000012544 monitoring process Methods 0.000 description 2
- 239000013307 optical fiber Substances 0.000 description 2
- 238000001228 spectrum Methods 0.000 description 2
- 230000015556 catabolic process Effects 0.000 description 1
- 238000011109 contamination Methods 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000010291 electrical method Methods 0.000 description 1
- 230000001788 irregular Effects 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000000691 measurement method Methods 0.000 description 1
- 238000000275 quality assurance Methods 0.000 description 1
- 150000003839 salts Chemical class 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]
本発明は送電線の電気絶縁に使用する碍子から発生ずる
コロナ音を検出する碍子コロナ音検出装置に関するもの
である。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an insulator corona sound detection device for detecting corona sound generated from an insulator used for electrical insulation of power transmission lines.
[従来の技術]
架空送電線は電力供給業務上、必要不可欠の設備であり
、この設備の故障は高度に電化した現代社会に極めて重
大な影響を及ぼし、あらゆる方面での社会機能が麻痺す
ることは必至である。[Conventional technology] Overhead power transmission lines are essential equipment for power supply operations, and failure of this equipment can have an extremely serious impact on today's highly electrified society, paralyzing social functions in all areas. is inevitable.
このため、送電線には極めて高い信頼性が要求され、こ
れを満す設計と品質保証が施されているが、送電線に係
わる故障や事故を皆無にすることは不可能に近いのが現
状である。For this reason, extremely high reliability is required of power transmission lines, and although designs and quality assurance have been implemented to meet this requirement, it is currently nearly impossible to completely eliminate breakdowns and accidents related to power transmission lines. It is.
送電線に発生する故障のうち、最も重大なものは送電停
止を引き起す電気的故障であり、専ら地絡故障や短絡故
障の電気的絶縁性能に関するものである。送電線の電気
絶縁は鉄塔支持部においては、碍子連、鉄塔間において
は、一定の離隔距離を設けた空気絶縁によってなされて
いるが、このうち鉄塔支持部の碍子は降雨の影響や塩害
等の汚損によってその絶縁性能が大きく変化する。その
ため、碍子の絶縁性能を頻繁に監視し、碍子閃絡事故等
の重大事故に至る前に絶縁性能劣化を検知できれば、送
電線の重大事故を未然に防止することが可能である。Among the faults that occur in power transmission lines, the most serious ones are electrical faults that cause power transmission to stop, and are mainly related to electrical insulation performance in the case of ground faults or short circuit faults. Electrical insulation of power transmission lines is achieved by insulators at the tower support parts, and by air insulation with a certain distance between the towers, but the insulators at the tower support parts are susceptible to rain, salt damage, etc. Its insulation performance changes greatly due to contamination. Therefore, if the insulation performance of insulators can be frequently monitored and deterioration of insulation performance can be detected before serious accidents such as insulator flashovers occur, serious accidents on power transmission lines can be prevented.
碍子の絶縁劣化の前兆とし、て、いわゆるコロナ放電の
発生があり、このコロナ放電の発生状況を監視すること
により、碍子の絶縁劣化を未然に検知することができる
。A so-called corona discharge occurs as a sign of deterioration of the insulation of the insulator, and by monitoring the occurrence of this corona discharge, deterioration of the insulation of the insulator can be detected in advance.
コロナ放電の発生状況を監視するには、碍子のコロナ放
電電流を測定してこの電流値からコロナ放電を直接検出
する電気的な方法と、コロナ放電時に発生するコロナ音
を検出し、てこの音からコロナ放電を間接的に検出する
音響的な方法とがある。To monitor the occurrence of corona discharge, there are two methods: an electrical method that measures the corona discharge current of the insulator and directly detects corona discharge from this current value; There is also an acoustic method to indirectly detect corona discharge.
このうち、特に後者のコロナ騒音検出方法は、騒音計を
、地上あるいは碍子近傍に騒音観測のために暫定的に設
置するものであり、構成が極めて簡単で技術的に魅力の
あるものである。Of these, the latter method of detecting corona noise, in which a sound level meter is temporarily installed on the ground or near the insulator for noise observation, is extremely simple and technically attractive.
[発明が解決しようとする課題]
ところが従来のコロナ騒音検出方法は、前記したように
地上あるいは碍子近傍の鉄塔上で周囲の騒音とともに一
括観測するものであるため、コロナ音の判別が非常に難
しいという問題があった。[Problem to be solved by the invention] However, as mentioned above, in the conventional method of detecting corona noise, since it is observed together with surrounding noise on the ground or on a steel tower near the insulator, it is very difficult to distinguish the corona noise. There was a problem.
本発明の目的は、共鳴現象を利用して特定周波数成分の
音のみを強調し、て検出することによって、前記し、た
従来技術の欠点を解消し、碍子が発生するコロナ音を確
実に検出することができる新規な碍子コロナ音検出装置
を提供することにある。The purpose of the present invention is to eliminate the above-mentioned drawbacks of the prior art by emphasizing and detecting only the sound of a specific frequency component using resonance phenomenon, and to reliably detect the corona sound generated by the insulator. An object of the present invention is to provide a novel insulator corona sound detection device capable of detecting.
[課題を解決するための手段]
本発明の碍子コロナ音検出装置は、送電線を絶縁支持す
る碍子の接地電位側に、碍子から発生するコロナ音から
特定周波数成分の音のみを共鳴させて取り出す共鳴器を
設け、この共鳴器にコロナ音から取り出した特定周波数
成分の音を検出する音響センサを取り付けるようにした
ものである。[Means for Solving the Problems] The insulator corona sound detection device of the present invention resonates and extracts only the sound of a specific frequency component from the corona sound generated from the insulator on the ground potential side of the insulator that insulates and supports the power transmission line. A resonator is provided, and an acoustic sensor is attached to the resonator to detect the sound of a specific frequency component extracted from the corona sound.
ここで特定周波数成分とは、他の周波数成分よりも音圧
レベルが高く、外来雑音からコロナ音を判別できる成分
をいう、なお、碍子には碍子連も含まれる。Here, the specific frequency component refers to a component that has a higher sound pressure level than other frequency components and allows corona sound to be distinguished from external noise. Note that the insulator also includes an insulator chain.
[作用]
碍子の劣化によるコロナ放電に伴うコロナ音が発生する
と、このコロナ音は周囲の外来雑音に混じって共鳴器に
入り、ここでコロナ音のうちの特定周波数成分だけが強
調されて取り出される。取り出された成分の音は音響セ
ンサにキャッチされて電気信号に変換される。[Operation] When corona sound is generated due to corona discharge due to deterioration of the insulator, this corona sound is mixed with surrounding external noise and enters the resonator, where only specific frequency components of the corona sound are emphasized and extracted. . The extracted sound components are captured by an acoustic sensor and converted into electrical signals.
[実施例コ
以下、本発明の碍子コロナ音検出装置を詳細に説明する
。[Embodiment] The insulator corona sound detection device of the present invention will be described in detail below.
第2図は、本発明の碍子コロナ音検出装置が検出対象と
するコロナ音の周波数分布の測定結果の一例を示したも
のである。同図に示す通り、コロナ音のスペクトルは広
範囲の周波数にわたる不規則雑音成分の中に、商用電力
周波数(50Hz)の2倍の周波数に相当する100H
zに顕著なビークPが存在することがわかる。従って、
この100+12に的をしぼって検出すれば、正確なコ
ロナ音の検出が可能となる。この100H2成分の音を
コロナハム音という。FIG. 2 shows an example of the measurement results of the frequency distribution of corona sound, which is a detection target of the insulator corona sound detection device of the present invention. As shown in the figure, the spectrum of corona sound includes irregular noise components over a wide range of frequencies, including a frequency of 100Hz, which is twice the commercial power frequency (50Hz).
It can be seen that there is a noticeable peak P at z. Therefore,
If the detection is focused on 100+12, it becomes possible to accurately detect the corona sound. This 100H2 component sound is called a corona hum sound.
第1図は本発明の碍子コロナ音検出装置の一実施例を示
す構成図である。送電線1は通常鉄塔部において碍子連
2によって吊り下げ保持されている。この碍子連2の接
地電位側である鉄塔取付端付近に円盤3が取り付けられ
、その外周に中空環状の共鳴器4が設置されている。す
なわち、環状の共鳴器4は碍子連2の軸心を中心とした
円周部分に円盤3を介して設置される。この共鳴器4の
共鳴中心周波数は商用電力周波数の2倍の周波数になる
ように設定される。例えば、50Hzの場合には100
Hz 、60tlzの場合には12叶2となる。し、か
し。FIG. 1 is a block diagram showing an embodiment of the insulator corona sound detection device of the present invention. The power transmission line 1 is normally suspended and held by an insulator chain 2 at a steel tower portion. A disk 3 is attached near the end of the insulator chain 2 that is attached to the steel tower on the ground potential side, and a hollow annular resonator 4 is installed around the outer periphery of the disk 3. That is, the annular resonator 4 is installed on the circumference of the insulator chain 2 with the disk 3 interposed therebetween. The resonance center frequency of this resonator 4 is set to be twice the commercial power frequency. For example, for 50Hz, 100
In the case of Hz and 60 tlz, the number is 12 times 2. but.
必ずしも共鳴中心周波数は商用電力周波数の2倍に限定
されるものではなく、商用周波数の整数倍としてもよい
。また共鳴器4には周方向に沿って複数の孔6を設け、
空間を伝搬する音を取り込むようにしである。共鳴器4
の内部においては、取り込まれた音のうちコロナハム音
が増幅され、これ以外の周波数の雑音は逆に低減される
。共鳴器4の内部に、例えば圧電型マイクロホンから構
成される音響センサ5が取り付けられ、強調されたコロ
ナハム音をこの音響センサ5により検出する。The resonance center frequency is not necessarily limited to twice the commercial power frequency, but may be an integral multiple of the commercial power frequency. Further, the resonator 4 is provided with a plurality of holes 6 along the circumferential direction,
It is designed to capture sound propagating through space. Resonator 4
Inside the system, the corona hum sound among the captured sounds is amplified, and noise at other frequencies is conversely reduced. An acoustic sensor 5 composed of, for example, a piezoelectric microphone is attached inside the resonator 4, and the acoustic sensor 5 detects the emphasized corona hum sound.
検出信号は、例えば光に変換し、た後、光ファイバ複合
架空地線の光ファイバを使って中央監視局へ送信する。The detection signal is converted into light, for example, and then transmitted to a central monitoring station using an optical fiber of a combined optical fiber overhead ground line.
従って、通常の騒音測定手法では外来雑音も含めた総合
的音レベルを検出するため、正確なコロナ音の識別がむ
すかし、いのに対して1本実施例の碍子コロナ音検出装
置ではコロナハム音成分のみを共鳴現象を利用して強調
するために極めて高感度かつ正確にコロナ音を検出でき
る。Therefore, since the normal noise measurement method detects the overall sound level including external noise, it is difficult to accurately identify the corona sound.In contrast, the insulator corona sound detection device of this embodiment Corona sounds can be detected with extremely high sensitivity and accuracy because only the sound components are emphasized using resonance phenomena.
特に、共鳴器4を接地電位側に設置し、なので、碍子連
2を構成する碍子のいずれから発生するコロナ音も洩れ
なく有効に取り込むことができる。また共鳴器4を環状
に形成して碍子3!2の軸心上に設置し、なので、碍子
連2の周方向の劣化箇所に関わらず、発生コロナ音を有
効にキャッチできる。In particular, since the resonator 4 is installed on the ground potential side, corona noise generated from any of the insulators constituting the insulator chain 2 can be effectively captured without omission. Further, the resonator 4 is formed into an annular shape and is installed on the axis of the insulator 3!2, so that the generated corona sound can be effectively caught regardless of the deterioration location of the insulator chain 2 in the circumferential direction.
なお、共鳴器4には複数の孔6を設け、空間を伝搬する
音を取り込むようにし、ているが、孔6を設けずに碍子
連2から円盤3を伝搬してくる音からでも検出は可能で
ある。Note that the resonator 4 is provided with a plurality of holes 6 to capture sound propagating through the space, but even if no holes 6 are provided, the sound propagating from the insulator chain 2 to the disk 3 cannot be detected. It is possible.
[発明の効果]
本発明によれば、共鳴によりコロナ音成分のみを取り出
すようにしたので、騒音レベルに関わらず、極めて高感
度かつ正確に碍子に発生するコロナ音を検出することが
できる。[Effects of the Invention] According to the present invention, since only the corona sound component is extracted by resonance, the corona sound generated in the insulator can be detected with extremely high sensitivity and accuracy regardless of the noise level.
第1図は本発明に係る碍子コロナ音検出装置の一実施例
を示す構成図、第2図は検出対象となるコロナ音の周波
数分布の一例を示すスペクトル図である。
図中、1は送電線、2は碍子連、4は共鳴器、5は音響
センサである。
特許出願人 日立電線株式会社
代理人弁理士 絹 谷 信 雄
ミ へ 脅 喝
口江ト−1+緘叔橡FIG. 1 is a block diagram showing an embodiment of an insulator corona sound detection device according to the present invention, and FIG. 2 is a spectrum diagram showing an example of the frequency distribution of corona sound to be detected. In the figure, 1 is a power transmission line, 2 is an insulator chain, 4 is a resonator, and 5 is an acoustic sensor. Patent applicant: Hitachi Cable Co., Ltd. Patent attorney Yumi Kinuya
Claims (1)
ら発生するコロナ音から特定周波数成分の音のみを共鳴
させて取り出す共鳴器を設け、この共鳴器にコロナ音か
ら取り出した特定周波数成分の音を検出する音響センサ
を取り付けたことを特徴とする碍子コロナ音検出装置。1. A resonator is installed on the ground potential side of the insulator that insulates and supports the power transmission line, and that resonates and extracts only the sound of a specific frequency component from the corona sound generated from the insulator. An insulator corona sound detection device characterized by being equipped with an acoustic sensor that detects the sound of.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP11261188A JPH01284775A (en) | 1988-05-11 | 1988-05-11 | Corona sound detecting device for insulator |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP11261188A JPH01284775A (en) | 1988-05-11 | 1988-05-11 | Corona sound detecting device for insulator |
Publications (1)
Publication Number | Publication Date |
---|---|
JPH01284775A true JPH01284775A (en) | 1989-11-16 |
Family
ID=14591067
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP11261188A Pending JPH01284775A (en) | 1988-05-11 | 1988-05-11 | Corona sound detecting device for insulator |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPH01284775A (en) |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH04259099A (en) * | 1991-02-13 | 1992-09-14 | Kobishi Denki Kk | Alarm unit and sound collection detector |
JPH10197326A (en) * | 1997-01-10 | 1998-07-31 | Chubu Electric Power Co Inc | Apparatus and method for discrimination of stain on insulator |
JP2012221926A (en) * | 2011-04-14 | 2012-11-12 | Chubu Electric Power Co Inc | Deterioration diagnosis device for insulator |
WO2013160991A1 (en) * | 2012-04-23 | 2013-10-31 | 中国電力株式会社 | Scintillation estimation method |
CN106291283A (en) * | 2016-08-18 | 2017-01-04 | 济南学泰电子科技有限公司 | A kind of insulator monitoring instrument and monitoring method |
-
1988
- 1988-05-11 JP JP11261188A patent/JPH01284775A/en active Pending
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH04259099A (en) * | 1991-02-13 | 1992-09-14 | Kobishi Denki Kk | Alarm unit and sound collection detector |
JPH10197326A (en) * | 1997-01-10 | 1998-07-31 | Chubu Electric Power Co Inc | Apparatus and method for discrimination of stain on insulator |
JP2012221926A (en) * | 2011-04-14 | 2012-11-12 | Chubu Electric Power Co Inc | Deterioration diagnosis device for insulator |
WO2013160991A1 (en) * | 2012-04-23 | 2013-10-31 | 中国電力株式会社 | Scintillation estimation method |
JP5719970B2 (en) * | 2012-04-23 | 2015-05-20 | 中国電力株式会社 | Scintillation estimation method |
CN106291283A (en) * | 2016-08-18 | 2017-01-04 | 济南学泰电子科技有限公司 | A kind of insulator monitoring instrument and monitoring method |
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