JPH06109555A - Temperature monitor for power line - Google Patents
Temperature monitor for power lineInfo
- Publication number
- JPH06109555A JPH06109555A JP26167392A JP26167392A JPH06109555A JP H06109555 A JPH06109555 A JP H06109555A JP 26167392 A JP26167392 A JP 26167392A JP 26167392 A JP26167392 A JP 26167392A JP H06109555 A JPH06109555 A JP H06109555A
- Authority
- JP
- Japan
- Prior art keywords
- power line
- shape memory
- memory alloy
- monitoring device
- temperature monitoring
- 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
Landscapes
- Suspension Of Electric Lines Or Cables (AREA)
- Measuring Temperature Or Quantity Of Heat (AREA)
- Electric Cable Installation (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、電力用送電線や変電所
内の母線接続部のような電力線の異常な温度上昇を監視
するための電力線温度監視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 power line temperature monitoring device for monitoring an abnormal temperature rise of a power line such as a power transmission line or a busbar connecting portion in a substation.
【０００２】[0002]
【従来の技術】電力用送電線や変電所内の母線接続部等
の電力線の長期にわたる信頼性を維持するためには、母
線圧縮部やクランプ部の機械的強度の低下を監視するの
みならず、それらの部分の異常発熱の有無を定期的に点
検する必要がある。2. Description of the Related Art In order to maintain long-term reliability of power lines such as power transmission lines and busbar connection parts in substations, in addition to monitoring the mechanical strength deterioration of busbar compression parts and clamp parts, It is necessary to regularly inspect those parts for abnormal heat generation.
【０００３】このために従来から電線スリーブ点検器と
呼ばれる電力線監視装置が使用されている。これは母線
圧縮部やクランプ部の電線スリーブの外面にセンサを接
触させ、磁力線検出、透磁率検出、直流磁界検出等の方
法によってその異常を検出する装置である。しかし停電
作業を必要とすること、鉄塔からやや離れた位置にある
母線圧縮部やクランプ部まで作業員が行く必要があり作
業性が悪いこと等の問題がある。For this reason, a power line monitoring device called a wire sleeve inspection device has been conventionally used. This is a device in which a sensor is brought into contact with the outer surface of the electric wire sleeve of the busbar compression portion or the clamp portion, and the abnormality is detected by methods such as magnetic field line detection, magnetic permeability detection, and DC magnetic field detection. However, there are problems such as the need for power outage work and the poor workability because the worker needs to go to the busbar compression section and the clamp section, which are located slightly away from the tower.
【０００４】このほかに、赤外線検出方式により異常発
熱を検出する装置もあるが、映像方式のものは装置が大
型で高価であり、また赤外線温度計は周辺温度と平均化
された値が出るために精度が悪いという問題がある。更
に電力線にサーモラベルを貼りつけておく方法もある
が、これは作業員が各鉄塔を巡回して目視により確認す
る必要があり、いずれも多くの問題を残していた。In addition to the above, there is a device for detecting abnormal heat generation by the infrared detection system, but the image system has a large size and is expensive, and the infrared thermometer outputs a value averaged with the ambient temperature. There is a problem with poor accuracy. There is also a method of attaching a thermo label to the electric power line, but this requires a worker to visually check each tower by observing each tower, which leaves many problems.
【０００５】[0005]
【発明が解決しようとする課題】本発明は上記した従来
の問題点を解決し、活線状態のまま電力線の異常発熱を
精度よく監視することができ、しかも作業員が現地へ出
向く必要がない電力線温度監視装置を提供するために完
成されたものである。SUMMARY OF THE INVENTION The present invention solves the above-mentioned problems of the prior art and enables accurate monitoring of abnormal heat generation of a power line in a live line state, and does not require a worker to visit the site. It has been completed to provide a power line temperature monitoring device.
【０００６】[0006]
【課題を解決するための手段】上記の課題を解決するた
めになされた本発明の電力線温度監視装置は、電力線
に、温度が設定値を越えたときに先端が電力線から離隔
してコロナ放電を発生する形状記憶合金を取り付けると
ともに、その近傍にその放電電流又は放電電界を検出す
る検出部を設置したことを特徴とするものである。SUMMARY OF THE INVENTION The power line temperature monitoring device of the present invention, which has been made to solve the above problems, causes a corona discharge on the power line when the temperature of the power line exceeds a preset value. The shape memory alloy to be generated is attached, and a detector for detecting the discharge current or the discharge electric field is installed in the vicinity thereof.
【０００７】[0007]
【作用】本発明の電力線温度監視装置は、電力線の温度
が設定値を越えると電力線に取り付けられた形状記憶合
金が湾曲し、その先端が電力線から離隔する。このとき
形状記憶合金の先端部の空間電界強度が18KV/cm 以上と
なるように形状記憶合金の形状を設定しておけば、形状
記憶合金の先端部からコロナ放電を発生する。そこでこ
のコロナ放電による放電電流又は放電電界をその近傍の
鉄塔等に設置された検出部により検出し、変電所又は制
御所の演算処理装置へ伝送するようにしておけば、作業
員が現地へ出向く必要なく、活線状態のまま電力線の異
常発熱を精度よく監視することができる。In the power line temperature monitoring apparatus of the present invention, when the temperature of the power line exceeds the set value, the shape memory alloy attached to the power line bends and its tip is separated from the power line. At this time, if the shape of the shape memory alloy is set so that the spatial electric field strength at the tip of the shape memory alloy is 18 KV / cm or more, corona discharge is generated from the tip of the shape memory alloy. Therefore, if the discharge current or discharge electric field due to this corona discharge is detected by a detection unit installed in the nearby tower, etc., and transmitted to the arithmetic processing unit at the substation or control station, the worker will go to the site. It is possible to accurately monitor the abnormal heat generation of the power line without the need for the live line.
【０００８】[0008]
【実施例】以下に本発明を図示の実施例によって更に詳
細に説明する。図１において、１は送電線や変電所内の
母線のような高圧の電力線であり、２はこの電力線１の
異常発熱を監視したい部分に取り付けられた棒状の形状
記憶合金である。周知のように形状記憶合金は塑性変形
し易いマルテンサイト相と、安定なオーステナイト相と
の間の結晶構造の変化を利用したもので、低温において
変形させた状態から高温に加熱すると、当初の安定な形
状に復帰する現象を利用して形状を記憶させるものであ
る。本実施例では、温度が設定値を越えたときに先端が
電力線１から離隔する方向に湾曲する形状記憶合金２が
使用され、クランプ金具３により電力線１にクランプさ
れている。The present invention will be described below in more detail with reference to the illustrated embodiments. In FIG. 1, 1 is a high-voltage power line such as a power line or a bus bar in a substation, and 2 is a rod-shaped shape memory alloy attached to a portion of the power line 1 where abnormal heat generation is to be monitored. As is well known, shape memory alloys utilize the change in crystal structure between the martensite phase, which is easily plastically deformed, and the stable austenite phase, and when heated from a deformed state at a low temperature to a high temperature, the initial stability The shape is memorized by utilizing the phenomenon of returning to a different shape. In the present embodiment, the shape memory alloy 2 whose tip is curved in a direction away from the power line 1 when the temperature exceeds the set value is used, and is clamped to the power line 1 by the clamp metal fitting 3.
【０００９】高圧の電力線１の周囲には電界が形成され
ているが、形状記憶合金２が一点鎖線で示した位置にあ
るときには、形状記憶合金２は電力線１によりシールド
されたと同様の状態にあり、その先端部の空間電界強度
は小さい。しかし図１に実線で示したように湾曲したと
きにその先端部の空間電界強度が18KV/cm 以上となるよ
うにしておけば、コロナ放電が発生する。An electric field is formed around the high-voltage power line 1, but when the shape memory alloy 2 is at the position shown by the alternate long and short dash line, the shape memory alloy 2 is in the same state as being shielded by the power line 1. , The spatial electric field strength at the tip is small. However, if the spatial electric field strength at the tip end is 18 KV / cm or more when curved as shown by the solid line in FIG. 1, corona discharge occurs.
【００１０】一方、電力線１を支持している鉄塔等に
は、このコロナ放電による放電電流又は放電電界を検出
する検出部４が設けられている。実施例の検出部４は受
信アンテナ５と、受信部６と、判定部７と、伝送装置８
と、表示装置９と、電源10とを備えている。判定部７は
受信アンテナ５により受信されたコロナ放電が、電力線
１の異常加熱によるものか、あるいは積雪や降雨による
ものかを判定する部分である。降雨や積雪によるコロナ
放電は一過性であるのに対して、電力線１の異常加熱は
永続性があるので、これを識別するために遅延回路を設
けて誤動作を防止することができる。On the other hand, the steel tower or the like supporting the power line 1 is provided with a detector 4 for detecting the discharge current or discharge electric field due to this corona discharge. The detection unit 4 of the embodiment includes a reception antenna 5, a reception unit 6, a determination unit 7, and a transmission device 8.
And a display device 9 and a power supply 10. The determination unit 7 is a unit that determines whether the corona discharge received by the receiving antenna 5 is due to abnormal heating of the power line 1, snowfall, or rainfall. Corona discharge due to rainfall or snow is transient, whereas abnormal heating of the power line 1 is permanent, so a delay circuit can be provided to identify this and prevent malfunction.
【００１１】伝送装置８は測定値の強度レベルを規格化
し、所定時間内のデータをOPGW (光ファイバ内蔵架空地
線) 11を介して変電所又は制御所の演算処理装置12へデ
ータ伝送するための装置である。これによって変電所又
は制御所の演算処理装置12は定期的に各鉄塔の異常を自
動的に監視し、作業員が各鉄塔まで出向くことなくその
異常を知ることができる。The transmission device 8 standardizes the intensity level of the measured value and transmits the data within a predetermined time to the arithmetic processing unit 12 of the substation or control station through the OPGW (overhead ground wire with built-in optical fiber) 11. Device. As a result, the arithmetic processing unit 12 at the substation or control station can automatically monitor the abnormality of each tower periodically, and the worker can know the abnormality without going to each tower.
【００１２】表示装置９はコロナ放電による放電電流又
は放電電界が所定レベル以上で所定時間継続したとき動
作するもので、実施例では垂れ幕13を垂れ下がらせるこ
とにより、離れた位置からも観察し易いようにしてあ
る。この表示装置９は必須のものではないが、作業員が
修理のために現場へ出向いたときに修理すべき鉄塔を発
見するうえで便利である。なお、電源10としては、太陽
電池又はAC電源を用いることができる。The display device 9 operates when the discharge current or discharge electric field due to corona discharge continues for a predetermined time at a predetermined level or more. In the embodiment, the hanging screen 13 is hung so that it can be easily observed from a distant position. Is done. Although this display device 9 is not essential, it is convenient for an operator to find a steel tower to be repaired when he goes to the site for repair. As the power source 10, a solar cell or an AC power source can be used.
【００１３】図２と図３に示す実施例では、形状記憶合
金２のクランプ金具３の周囲に放熱手段としてのフィン
14が形成されている。一般に、形状記憶合金は使用可能
な温度範囲が100 ℃以下であるのに対して、電力線１の
温度は150 ℃に達することがある。このために、フィン
14によって形状記憶合金２を冷却し、電力線１の温度が
150 ℃に達したときにも形状記憶合金２を保護すること
が好ましい。In the embodiment shown in FIGS. 2 and 3, a fin as a heat radiation means is provided around the clamp metal fitting 3 of the shape memory alloy 2.
14 are formed. In general, shape memory alloys have a usable temperature range of 100 ° C. or lower, whereas the temperature of the power line 1 may reach 150 ° C. For this, fins
The shape memory alloy 2 is cooled by 14 and the temperature of the power line 1 is
It is preferable to protect the shape memory alloy 2 even when the temperature reaches 150 ° C.
【００１４】図４、図５は上記したような形状記憶合金
２のクランプ金具３をＵ字状に形成しておき、活線操作
棒15によって活線状態にある電力線１に取り付けること
ができるようにしたものである。これにより停電工事を
なくすることができ、既存の電力線１への形状記憶合金
２の取付け工事が簡単に行えることとなる。4 and 5, the clamp metal fitting 3 of the shape memory alloy 2 as described above is formed in a U shape so that it can be attached to the live power line 1 by the live wire operating rod 15. It is the one. This makes it possible to eliminate power outage work, and to easily attach the shape memory alloy 2 to the existing power line 1.
【００１５】ところで、形状記憶合金２は所定温度に達
して当初の安定なオーステナイト相に復帰して湾曲する
と、温度が低下した後もそのままの形状を保ちそれ自体
では再び直線状には戻らない。このために前記した例で
は作業員が湾曲した形状記憶合金２に力を加えて直線状
に戻す必要がある。そこで図６、図７の例では、形状記
憶合金製のスプリング２ａと通常の金属製のスプリング
２ｂとを直列状態に接合した復元手段を設けてある。こ
のように構成しておけば、所定温度以上に加熱されると
形状記憶合金製のスプリング２ａがスプリング２ｂを押
圧しながら伸び、それによって図７のようにその先端部
が電力線１から離隔するが、温度が低下すると通常の金
属製のスプリング２ｂの力が形状記憶合金製のスプリン
グ２ａを塑性変形させるに要する力よりも大きくなり、
再び元の図６の形状に戻すことができる。By the way, when the shape memory alloy 2 reaches a predetermined temperature and returns to the original stable austenite phase and then bends, the shape memory alloy 2 maintains its shape even after the temperature is lowered, and does not return to a straight line by itself. For this reason, in the above-described example, it is necessary for the worker to apply a force to the curved shape memory alloy 2 to restore it to the straight shape. Therefore, in the examples of FIGS. 6 and 7, a restoring means is provided in which the spring 2a made of a shape memory alloy and the spring 2b made of a normal metal are joined in series. According to this structure, when heated to a predetermined temperature or higher, the shape memory alloy spring 2a extends while pressing the spring 2b, which separates the tip end thereof from the power line 1 as shown in FIG. When the temperature decreases, the force of the ordinary metal spring 2b becomes larger than the force required to plastically deform the shape memory alloy spring 2a,
The original shape of FIG. 6 can be restored again.
【００１６】また図８、図９に示すように形状記憶合金
製のスプリング２ａと通常の金属製のスプリング２ｂと
を並列に並べた復元手段を設け、上記と同様の動作を行
わせることもできる。図６〜図９のように構成しておけ
ば、電力線１の異常発熱が消滅した後は形状記憶合金を
コロナ放電を発しない状態に自動的に戻すことができ、
作業員が現場へ出向いて直線状に戻す必要をなくするこ
とができる。Further, as shown in FIGS. 8 and 9, it is also possible to provide a restoring means in which a spring 2a made of a shape memory alloy and a spring 2b made of a normal metal are arranged in parallel to perform the same operation as described above. . If configured as shown in FIGS. 6 to 9, the shape memory alloy can be automatically returned to a state in which no corona discharge is generated after abnormal heat generation of the power line 1 disappears,
It is possible to eliminate the need for the worker to go to the site and return to a straight line.
【００１７】[0017]
【発明の効果】以上に説明したように、本発明の電力線
温度監視装置によれば、活線状態のままで電力線の異常
発熱を精度よく監視することができ、しかも作業員が現
地へ出向く必要がない。またこの装置は電力線の負荷電
流通電許容値の判断にも使用することができる。すなわ
ち、電力線の負荷電流通電許容値は電力線の温度上昇限
界値によって決定されるため、本発明の装置により電力
線の温度上昇を監視しておれば、夏期の電力消費量過大
時に従来以上の電流を流せることも期待でき、発電量予
備率の向上にもつながることとなる。As described above, according to the power line temperature monitoring device of the present invention, it is possible to accurately monitor abnormal heat generation of the power line in a live line state, and it is necessary for the worker to go to the site. There is no. This device can also be used to determine the load current energization allowable value of the power line. That is, the load current energization allowable value of the power line is determined by the temperature rise limit value of the power line. It can also be expected to be drained, which will lead to an improvement in the reserve capacity of power generation.
【図１】本発明の実施例を示すブロック図である。FIG. 1 is a block diagram showing an embodiment of the present invention.
【図２】放熱手段を備えた形状記憶合金を示す正面図で
ある。FIG. 2 is a front view showing a shape memory alloy provided with heat dissipation means.
【図３】図２の側面図である。FIG. 3 is a side view of FIG.
【図４】活線取付け可能な形状記憶合金を示す正面図で
ある。FIG. 4 is a front view showing a shape memory alloy that can be attached to a live wire.
【図５】活線取付け可能な形状記憶合金とその取付け工
具を示す側面図である。FIG. 5 is a side view showing a shape memory alloy that can be attached to a hot wire and an attachment tool thereof.
【図６】自動復帰タイプの形状記憶合金を示す正面図で
ある。FIG. 6 is a front view showing an automatic return type shape memory alloy.
【図７】図６の形状記憶合金の動作状態を示す正面図で
ある。FIG. 7 is a front view showing an operating state of the shape memory alloy of FIG.
【図８】自動復帰タイプの他の形状記憶合金を示す正面
図である。FIG. 8 is a front view showing another shape memory alloy of the automatic restoration type.
【図９】図８の形状記憶合金の動作状態を示す正面図で
ある。9 is a front view showing an operating state of the shape memory alloy of FIG.
１ 電力線 ２ 形状記憶合金 ４ 検出部 ９ 表示装置 12 演算処理装置 14 放熱手段 DESCRIPTION OF SYMBOLS 1 Power line 2 Shape memory alloy 4 Detection part 9 Display device 12 Arithmetic processing device 14 Heat dissipation means
Claims (6)
先端が電力線から離隔してコロナ放電を発生する形状記
憶合金を取り付けるとともに、その近傍にその放電電流
又は放電電界を検出する検出部を設置したことを特徴と
する電力線温度監視装置。1. A detection unit for mounting a shape memory alloy on a power line, the tip of which separates from the power line when a temperature exceeds a set value to generate corona discharge, and which detects the discharge current or discharge electric field in the vicinity thereof. The power line temperature monitoring device is characterized by being installed.
が所定レベル以上で所定時間継続したとき動作する表示
装置を付設した請求項１記載の電力線温度監視装置。2. The power line temperature monitoring device according to claim 1, further comprising a display device which operates when a discharge current or discharge electric field due to corona discharge is maintained at a predetermined level or higher for a predetermined time.
の演算処理装置へ伝送し、この演算処理装置が電力線の
異常を監視するようにした請求項１記載の電力線温度監
視装置。3. The power line temperature monitoring device according to claim 1, wherein data within a predetermined time is transmitted to an arithmetic processing unit at a substation or a control station, and the arithmetic processing unit monitors an abnormality of the power line.
路を設けた請求項１記載の電力線温度監視装置。4. The power line temperature monitoring device according to claim 1, further comprising a delay circuit for preventing malfunction due to rainfall or snow.
項１記載の電力線温度監視装置。5. The power line temperature monitoring device according to claim 1, wherein the shape memory alloy is provided with a heat radiating means.
求項１記載の電力線温度監視装置。6. The power line temperature monitoring device according to claim 1, wherein the restoring means is incorporated in the shape memory alloy.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP26167392A JPH06109555A (en) | 1992-09-30 | 1992-09-30 | Temperature monitor for power line |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP26167392A JPH06109555A (en) | 1992-09-30 | 1992-09-30 | Temperature monitor for power line |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH06109555A true JPH06109555A (en) | 1994-04-19 |
Family
ID=17365151
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP26167392A Pending JPH06109555A (en) | 1992-09-30 | 1992-09-30 | Temperature monitor for power line |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH06109555A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH09149518A (en) * | 1995-11-27 | 1997-06-06 | Fujikura Ltd | Charging display device for high voltage line |
| CN103674292A (en) * | 2013-10-18 | 2014-03-26 | 国家电网公司 | Temperature detecting method and apparatus for devices of transformer station |
| CN106289575A (en) * | 2016-10-29 | 2017-01-04 | 国家电网公司 | A kind of substation equipment automatic temperature measurement early warning system |
-
1992
- 1992-09-30 JP JP26167392A patent/JPH06109555A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH09149518A (en) * | 1995-11-27 | 1997-06-06 | Fujikura Ltd | Charging display device for high voltage line |
| CN103674292A (en) * | 2013-10-18 | 2014-03-26 | 国家电网公司 | Temperature detecting method and apparatus for devices of transformer station |
| CN106289575A (en) * | 2016-10-29 | 2017-01-04 | 国家电网公司 | A kind of substation equipment automatic temperature measurement early warning system |
| CN106289575B (en) * | 2016-10-29 | 2023-08-01 | 国家电网公司 | Automatic temperature measurement early warning system of substation equipment |
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