JPH033912B2 - - Google Patents
Info
- Publication number
- JPH033912B2 JPH033912B2 JP15734382A JP15734382A JPH033912B2 JP H033912 B2 JPH033912 B2 JP H033912B2 JP 15734382 A JP15734382 A JP 15734382A JP 15734382 A JP15734382 A JP 15734382A JP H033912 B2 JPH033912 B2 JP H033912B2
- Authority
- JP
- Japan
- Prior art keywords
- insulator
- resistor
- resistance value
- measured
- detection
- 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
Links
- 239000012212 insulator Substances 0.000 claims description 61
- 238000001514 detection method Methods 0.000 claims description 24
- 230000002950 deficient Effects 0.000 claims description 14
- 238000009413 insulation Methods 0.000 claims description 11
- 230000005540 biological transmission Effects 0.000 claims description 10
- 238000006243 chemical reaction Methods 0.000 claims description 5
- 239000002184 metal Substances 0.000 claims description 3
- 230000003252 repetitive effect Effects 0.000 description 3
- 238000005259 measurement Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/12—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing
- G01R31/1227—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing of components, parts or materials
- G01R31/1263—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing of components, parts or materials of solid or fluid materials, e.g. insulation films, bulk material; of semiconductors or LV electronic components or parts; of cable, line or wire insulation
- G01R31/1272—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing of components, parts or materials of solid or fluid materials, e.g. insulation films, bulk material; of semiconductors or LV electronic components or parts; of cable, line or wire insulation of cable, line or wire insulation, e.g. using partial discharge measurements
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
- B29K2083/00—Use of polymers having silicon, with or without sulfur, nitrogen, oxygen, or carbon only, in the main chain, as moulding material
- B29K2083/005—LSR, i.e. liquid silicone rubbers, or derivatives thereof
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Testing Relating To Insulation (AREA)
- Insulators (AREA)
Description
【発明の詳細な説明】
本発明は直流送電線用碍子装置において、課電
状態で各碍子の絶縁抵抗値を測定し、その絶縁抵
抗値から碍子の良否判定を行うようにした直流送
電線用不良碍子検出器に関するものである。DETAILED DESCRIPTION OF THE INVENTION The present invention provides an insulator device for a DC power transmission line, which measures the insulation resistance value of each insulator in a energized state and determines the quality of the insulator based on the insulation resistance value. This relates to a defective insulator detector.
長距離送電、海峡横断連系等に有利な直流架空
送電線が建設され実用運転されるようになつて久
しいが、直流架空送電線用碍子の保守点検を行な
うための不良碍子検出器がこれまで実用化されて
おらず、直流送電線用碍子の良否判定を適確容量
に行うことのできる直流送電線用不良碍子検出器
の開発が業界において強く要望されていた。 It has been a long time since DC overhead power transmission lines, which are advantageous for long-distance power transmission and cross-strait interconnection, have been constructed and put into practical operation. There has been a strong demand in the industry for the development of a defective insulator detector for DC power lines, which has not been put into practical use and can accurately determine the quality of insulators for DC power lines at an appropriate capacity.
本発明は前記のような要望に応える目的の下に
完成された直流送電線用不良碍子検出器に関する
もので、以下、本発明を図示の実施例について詳
細に説明する。 The present invention relates to a defective insulator detector for DC power transmission lines completed with the purpose of meeting the above-mentioned demands, and the present invention will be described in detail below with reference to the illustrated embodiments.
１は直流の運転電圧Eoが課電されたｎ個の碍
子個数を有する碍子連で、該碍子連１の個々の碍
子を１つの抵抗体とみなし、被測定碍子２の抵抗
値をRx、被測定碍子２を除く他の碍子３の抵抗
値をRnとする。４，４′はこの課電された碍子連
１上を自動走行する図示しない機器本体の駆動部
に取付けられて被測定碍子の金具部に接触する２
本の接触子であつて、該接触子４，４′のうちい
ずれか一方には課電された碍子連１の漏れ電流値
を検出する抵抗値R1，R2が極端に異なる２種類
の抵抗体５，６をスイツチ等の切替機構７を介し
て切替できるように接続し、該抵抗体５，６のう
ちの一方は抵抗値が被測定碍子の標準の抵抗値よ
りはるかに低いものとし、例えば抵抗体５，６の
抵抗値R1，R2の大きさはRn＋Rx／ｎ：R2：R1＝
1000：100：１としておき、また、この抵抗体５，
６は前記した他方の接触子４′にも検出抵抗１０
を介して接続させておく。１１は両抵抗体５，６
と他方の接触子４′との間に接続される検出自動
記録回路で、該検出自動記録回路１１は前記切替
機構７の切替操作により前記各抵抗体５，６に流
れる漏れ電流量を検出記録して被測定碍子２の良
否判定を行うためのものであつて、漏れ電流を前
記検出抵抗１０の抵抗値を介し電圧として検出す
る検出回路１２と、検出回路１２により検出され
た電圧を繰返しパルスとして周波数に変換する電
圧−周波数変換回路１３と、該電圧−周波数変換
回路１３において繰返しパルスとして周波数変換
された出力を録音するカセツトテープレコーダ内
蔵の録音記録回路１４とにより形成されている。
なお、図中９は無課電時における不良碍子検出を
も行えるようにするため、抵抗体５と検出抵抗１
０間に切替機構８を介して必要に応じ設けられる
直流電源である。 1 is an insulator chain having n insulators to which a DC operating voltage Eo is applied.Each insulator in the insulator chain 1 is regarded as one resistor, and the resistance value of the insulator 2 to be measured is Rx, Let Rn be the resistance value of the other insulators 3 other than the measurement insulator 2. 4 and 4' are attached to the driving part of the main body of the device (not shown) which automatically runs on this energized insulator chain 1, and comes into contact with the metal part of the insulator to be measured.
One of the contacts 4 and 4' has two types of extremely different resistance values R 1 and R 2 for detecting the leakage current value of the insulator chain 1 that is energized. The resistors 5 and 6 are connected so as to be switchable via a switching mechanism 7 such as a switch, and one of the resistors 5 and 6 has a resistance value far lower than the standard resistance value of the insulator to be measured. For example, the resistance values R 1 and R 2 of the resistors 5 and 6 are set as Rn+Rx/n:R 2 :R 1 = 1000:100:1, and
6 is a detection resistor 10 also connected to the other contactor 4' mentioned above.
Connect via. 11 is both resistors 5 and 6
and the other contactor 4', and the automatic detection recording circuit 11 detects and records the amount of leakage current flowing through each of the resistors 5 and 6 by switching the switching mechanism 7. The purpose is to judge the quality of the insulator 2 to be measured by using a detection circuit 12 that detects leakage current as a voltage via the resistance value of the detection resistor 10, and pulses the voltage detected by the detection circuit 12 repeatedly. It is formed by a voltage-frequency conversion circuit 13 that converts the frequency into a frequency as a pulse, and a recording and recording circuit 14 built in a cassette tape recorder that records the output frequency-converted as a repetitive pulse in the voltage-frequency conversion circuit 13.
In addition, 9 in the figure is a resistor 5 and a detection resistor 1 in order to be able to detect a defective insulator even when no voltage is applied.
This is a DC power supply provided as necessary via a switching mechanism 8 between 0 and 0.
このように構成されたものは、課電された碍子
連１上を走行する機器本体の駆動部に取付けられ
た２本の接触子４，４′を被測定碍子２の金具部
に接触させるとともに切替機構７を接点７ａ側に
倒せば、接触子４−抵抗体５−接触子４′−被測
定碍子２間で閉回路を形成するため、他方の接触
子４′と抵抗体５間に検出抵抗１０を介し接続さ
れている検出自動記録回路１１に該抵抗体５に流
れる漏れ電流量が検出記録される。そして、この
低抵抗側の抵抗体５の抵抗値R1は前記したよう
に予め被測定碍子２の抵抗値Rxおよびその他の
碍子３の抵抗値Rnよりも小さく選んでいるため、
運転電圧Eoにより碍子連１に流れる漏れ電流Io
はその大部分が抵抗値の低い抵抗体５に流れ込ん
で検出電流量I1はI1≒I0となる。なお、抵抗体５
の抵抗値は不良碍子の直流絶縁抵抗値以下に設定
するが、一般には不良碍子の直流絶縁抵抗が３〜
50MΩ程度であることから、該抵抗体５の抵抗値
は約2MΩ程度に設定するのが好ましい。次に、
切替機構７を接点７ｂ側に倒せば、接触子４−抵
抗体６−接触子４′−被測定碍子２の間で閉回路
を形成するため、他方の接触子４′と抵抗体６間
に検出抵抗１０を介して接続されている検出自動
記録回路１１に該抵抗体６に流れる漏れ電流量が
検出記録される。そして、この抵抗体６の抵抗値
R2は抵抗体５の抵抗値R1よりも予めR1≪R2とし
ているためI2≪I1となる。この様に抵抗値の異な
る２種類の抵抗体５，６に切替機構７を切替操作
することによつて閉回路に検出抵抗１０を介して
接続されている検出自動記録回路１１により被測
定碍子の漏れ電流I1，I2を測定し、この測定結果
から(1)式により課電された碍子連における被測定
碍子の絶縁抵抗値を容易に求めることができる。 In this structure, the two contacts 4 and 4' attached to the drive part of the device body running on the energized insulator chain 1 are brought into contact with the metal part of the insulator 2 to be measured. When the switching mechanism 7 is turned to the contact 7a side, a closed circuit is formed between the contact 4, the resistor 5, the contact 4', and the insulator 2 to be measured, so that the detection occurs between the other contact 4' and the resistor 5. An automatic detection recording circuit 11 connected through a resistor 10 detects and records the amount of leakage current flowing through the resistor 5. The resistance value R 1 of the resistor 5 on the low resistance side is selected in advance to be smaller than the resistance value Rx of the insulator 2 to be measured and the resistance value Rn of the other insulators 3 as described above.
Leakage current Io flowing through insulator chain 1 due to operating voltage Eo
Most of it flows into the resistor 5 having a low resistance value, and the detected current amount I 1 becomes I 1 ≈I 0 . In addition, the resistor 5
The resistance value is set below the DC insulation resistance value of the defective insulator, but generally the DC insulation resistance of the defective insulator is 3 to 3.
Since the resistance value of the resistor 5 is about 50MΩ, it is preferable to set the resistance value of the resistor 5 to about 2MΩ. next,
If the switching mechanism 7 is tilted toward the contact 7b side, a closed circuit is formed between the contact 4, the resistor 6, the contact 4', and the insulator 2 to be measured, so that a closed circuit is formed between the other contact 4' and the resistor 6. An automatic detection recording circuit 11 connected via a detection resistor 10 detects and records the amount of leakage current flowing through the resistor 6. And the resistance value of this resistor 6
Since R 2 is set in advance to be R 1 <<R 2 than the resistance value R 1 of the resistor 5, I 2 <<I 1 . By operating the switching mechanism 7 to switch between the two types of resistors 5 and 6 having different resistance values in this way, the automatic detection recording circuit 11 connected to the closed circuit via the detection resistor 10 detects the insulator to be measured. The leakage currents I 1 and I 2 are measured, and from the measurement results, the insulation resistance value of the insulator to be measured in the energized insulator chain can be easily determined using equation (1).
Rx＝I2／I1−I2・R2≒I2／I0−I2・R2 ……(1)式
（I0≒I1）
なお、検出自動記録回路１１として実施例に記
載したように、漏れ電流を検出抵抗を介して検出
する検出回路１２と、該検出回路１２により電圧
として検出された漏れ電流を繰返しパルスとして
周波数に変換する電圧−周波数変換回路１３と、
該電圧−周波数変換回路１３において繰返しパル
スとして周波数変換された出力を録音するカセツ
トテープレコーダ内蔵の録音回路１４とよりなる
ものとしておけば、碍子連１のうち個々の被測定
碍子２の絶縁抵抗値を正確に把握記録できるばか
りでなく、検出中に検出者が聴覚をもつて一次的
に不良碍子の良否判定を行うこともできて便利な
ものである。また、前記実施例に示すように、切
替機構８を介して直流電源９に接続させておけ
ば、漏れ電流が流れていない無課電時においても
碍子連１の各被測定碍子２の絶縁抵抗値を測定し
てその大きさから不良碍子を検出でき、この場合
は切替機構８を切替えて直流電源９に接続させた
うえ切替機構７を抵抗体６側に接続させることに
よつて２本の接触子４，４′、抵抗体６、直流電
源９、検出抵抗１０が被測定碍子２を介して直列
に接続されるようにすれば、抵抗体６の抵抗値と
被測定碍子２の抵抗値の両端に内蔵の直流電源９
の電圧によつて電流が流れるから、この電流値を
測定することによつて課電されていない碍子連中
の被測定碍子２の絶縁抵抗値を(2)式により求める
ことができる。 Rx=I 2 /I 1 −I 2・R 2 ≒I 2 /I 0 −I 2・R 2 ...Equation (1) (I 0 ≒I 1 ) Note that this is described in the embodiment as the automatic detection recording circuit 11 As described above, the detection circuit 12 detects leakage current via a detection resistor, the voltage-frequency conversion circuit 13 converts the leakage current detected as a voltage by the detection circuit 12 into a frequency as a repetitive pulse,
If the recording circuit 14 has a built-in cassette tape recorder that records the frequency-converted output as a repetitive pulse in the voltage-frequency conversion circuit 13, the insulation resistance value of each insulator 2 to be measured in the insulator series 1 This is convenient because it not only allows the detector to accurately grasp and record the defective insulator, but also allows the detector to use his/her hearing to determine whether the defective insulator is good or not. In addition, as shown in the embodiment, if the DC power supply 9 is connected via the switching mechanism 8, the insulation resistance of each insulator 2 to be measured in the insulator chain 1 can be increased even when no current is applied and no leakage current is flowing. A defective insulator can be detected by measuring the value and its size. In this case, by switching the switching mechanism 8 and connecting it to the DC power supply 9, and then connecting the switching mechanism 7 to the resistor 6 side, it is possible to detect the defective insulator. If the contacts 4, 4', resistor 6, DC power source 9, and detection resistor 10 are connected in series via the insulator 2 to be measured, the resistance value of the resistor 6 and the resistance value of the insulator 2 to be measured are Built-in DC power supply 9 at both ends of
Since a current flows due to the voltage, by measuring this current value, the insulation resistance value of the insulator to be measured 2 of the insulators to which no voltage is applied can be determined from equation (2).
絶縁抵抗値＝直流電源の電圧／測定電流値−抵抗体の
抵抗
値 ……(2)式
本発明は前記実施例からも明らかなように、課
電された碍子連上を摺動できる２本の接触子と抵
抗値が極端に異なる２種類の抵抗体およびこれら
の抵抗体の切替機構を用いて被測定碍子を介して
閉回路を構成し、この閉回路に検出抵抗を介して
検出自動記録回路を接続することによつて各抵抗
体に流れる碍子連の漏れ電流値を測定し、この電
流値から被測定碍子の絶縁抵抗値を容易に測定で
きるもので、従来不可能とされていた課電状態に
おける直流送電線用碍子装置の不良碍子検出を適
確容易に行うことができる直流送電線用不良碍子
検出器として今後の直流送電線用碍子の保守点検
に活用でき、電力の安定輸送の点からも大きな効
果が期待できるものである。 Insulation resistance value = Voltage of DC power source / Measured current value - Resistance value of resistor... Equation (2) As is clear from the above embodiments, the present invention is based on two insulators that can slide a series of energized insulators. A closed circuit is constructed through the insulator to be measured using a contactor, two types of resistors with extremely different resistance values, and a switching mechanism for these resistors, and automatic recording of detection is performed through the detection resistor in this closed circuit. By connecting a circuit, the leakage current value of the insulator chain flowing through each resistor can be measured, and the insulation resistance value of the insulator to be measured can be easily measured from this current value, a task that was previously considered impossible. As a defective insulator detector for DC transmission lines that can accurately and easily detect defective insulators in insulators for DC transmission lines under electrical conditions, it can be used for future maintenance and inspection of insulators for DC transmission lines, and is useful for stable transportation of electricity. A great effect can be expected from this point of view.
図面は本発明の実施例を示す検出等価回路図で
ある。
１：直流送電線用の碍子連、２：被測定碍子、
４，４′：接触子、５，６：抵抗体、７：切替機
構、１１：検出自動記録回路。
The drawing is a detection equivalent circuit diagram showing an embodiment of the present invention. 1: Insulator chain for DC transmission line, 2: Insulator to be measured,
4, 4': Contact, 5, 6: Resistor, 7: Switching mechanism, 11: Detection automatic recording circuit.
Claims (1)
子の絶縁抵抗値を測定する２本の接触子のうちい
ずれか一方の接触子に抵抗値が被測定碍子の抵抗
値より低い抵抗体と該抵抗体より抵抗値が極端に
高い抵抗体をスイツチ等の切替機構を介して切替
できるように接続するとともに両抵抗体に他方の
接触子を接続させ、さらに、該他方の接触子と前
記両抵抗体との間には前記切替機構の切替操作に
より前記各抵抗体に流れる漏れ電流量を検出記録
して被測定碍子の良否判定をするための検出自動
記録回路を接続させたことを特徴とする直流送電
線用不良碍子検出器。 ２ 検出自動記録回路が漏れ電流を検出する検出
回路と、電圧を周波数に変換する電圧−周波数変
換回路と、周波数変換された出力を録音する録音
回路とにより形成されている特許請求の範囲第１
項記載の直流送電線用不良碍子検出器。[Scope of Claims] 1. The resistance value of one of the two contactors that is brought into contact with the metal part of the insulator to be measured to measure the insulation resistance value of the insulator to be measured is the resistance of the insulator to be measured. A resistor whose resistance value is lower than that of the resistor and a resistor whose resistance value is extremely higher than the resistor are connected so as to be switchable via a switching mechanism such as a switch, and both resistors are connected to the other contact, and further, the other resistor is connected to the other contactor. An automatic detection recording circuit is connected between the contactor and both of the resistors for detecting and recording the amount of leakage current flowing through each of the resistors by switching the switching mechanism to determine the quality of the insulator to be measured. A defective insulator detector for DC power transmission lines, which is characterized by: 2. Claim 1 in which the detection automatic recording circuit is formed by a detection circuit that detects leakage current, a voltage-frequency conversion circuit that converts voltage into frequency, and a recording circuit that records the frequency-converted output.
A defective insulator detector for DC transmission lines as described in Section 1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15734382A JPS5946562A (en) | 1982-09-09 | 1982-09-09 | Defective insulator detector for dc transmission line |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15734382A JPS5946562A (en) | 1982-09-09 | 1982-09-09 | Defective insulator detector for dc transmission line |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5946562A JPS5946562A (en) | 1984-03-15 |
| JPH033912B2 true JPH033912B2 (en) | 1991-01-21 |
Family
ID=15647604
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP15734382A Granted JPS5946562A (en) | 1982-09-09 | 1982-09-09 | Defective insulator detector for dc transmission line |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5946562A (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0745227Y2 (en) * | 1985-06-22 | 1995-10-18 | 高階救命器具株式会社 | Fire protection equipment |
| JPS6475977A (en) * | 1987-09-18 | 1989-03-22 | Ngk Insulators Ltd | Faulty insulator detector |
| JP4614329B2 (en) * | 2005-01-17 | 2011-01-19 | 日本碍子株式会社 | Defective insulator detector |
-
1982
- 1982-09-09 JP JP15734382A patent/JPS5946562A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5946562A (en) | 1984-03-15 |
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