JPS599567A - Auxiliary electrode apparatus for measuring distribution of space electric field - Google Patents

Abstract

PURPOSE:To enable highly precise measurement in a reduced staining degree at the time of rainwater, by making such a structure that the optical fiber from a measuring part is connected to the optical sensor in a pleated insulator having an insulating cap and the upper and the lower parts of the sensor are connected to an electrode. CONSTITUTION:An optical fiber cable 1 is inserted into a sensor part A in such a state that it is held between the rubber cap 9 provided to the lower side surface of an insulating rod 2 and a rubber protective bush 10 from a photoelectric conversion measuring instrument 11 through a connector 12 and pierced through the central orifice 5c of a disc electrode 5b to be connected to the BSO sensor 4b in a case 14. The sensor A has a cap 15 and is provided with a pleated insulator 30 while the cable 1 is bifurcated through the central orifice 5c to be connected to a BSO sensor 4a by a connector 13 at one end thereof in the case 14 therewithin and the lead wire 4b of said sensor 4a is fixed to an upper disc electrode 5a. Therefore, a staining degree is low even at the time of rainwater and highly precise measurement can be performed.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to the structure of an auxiliary electrode part in a device used for measuring spatial electric field strength distribution under live high-voltage overhead power transmission and distribution lines.

Generally, measures are taken to avoid concentration of electric fields and alleviate electrical stress under live high-voltage overhead power transmission and distribution lines. An auxiliary electrode device constructed of the above is used to measure the spatial electric field distribution under high-voltage power transmission and distribution lines by utilizing its electro-optic effect.

Figures 1, 2, and 3 show an overview of the auxiliary electrode device used to measure the spatial electric field distribution under conventional high-voltage power transmission and distribution lines. In the cylindrical device, an optical fiber cable l covered with an insulating rod 2 is electrically connected to a bismuth silicon oxide (hereinafter referred to as BSO) sensor installed at the bottom of an insulating case 3. Disk electrodes 5 on both sides of 3
is connected to.

FIG. 2 shows a conventional box-shaped auxiliary electrode device, in which disk electrodes 5 are arranged on both sides and upper and lower surfaces of a box-shaped insulating box 3B, and an optical fiber cable is placed on one side. A BSO sensor 4 electrically connected to the disk electrode 5 is connected to the disk electrode 5. FIG. 3 shows a side view of the box-shaped electrode, in which the optical fiber cable l is connected to the BSO sensor 4, and the tip of the sensor is connected to the disc electrode 5.

In such conventional cylindrical or box-shaped devices, the sensor section is constructed by arranging disk electrodes on the sides, etc.
7, so in humid conditions such as during rain,
The insulating case and the sensor section inside the insulating case are easily contaminated, and this has the disadvantage that the surface leakage current resistance decreases, leading to a decrease in the performance of the auxiliary electrode device and causing measurement errors during actual measurements.

This invention was made in order to eliminate the drawbacks of the conventional auxiliary electrode device used for measuring spatial electric field distribution in the high voltage field, etc. as described in 2. The fiber cable is connected to a light sensor inside a plurality of pleated insulators each having an insulating cap on the head and secured at the bottom with a nut, etc. It is an object of the present invention to provide an auxiliary electrode device that is connected to an electrode placed in the auxiliary electrode section to form an auxiliary electrode section.

Hereinafter, the structure of the auxiliary electrode device according to the present invention will be explained with reference to FIG.

In FIG. 4, the optical fiber cable 1 is connected to the measuring instrument section B.
Insert the cable l from the optical-to-electrical conversion measuring instrument 11 that constitutes the The central part surrounded by the insulating rod 2 is sandwiched by the rubber bushing IO attached to prevent the occurrence of scratches due to contact with the insulator 2, and the upper sensor part A
It is derived towards.

Furthermore, this optical fiber cable l is passed through the center hole 5c of the disc electrode 5b, which is fixed with a set screw 6 inside the tightening nut 7, which also serves as the attachment of the insulating rod 2, which is fixed with a fixing screw 8. BSO sensor 4a inside case 14 inside sensor part A
, 4b.

The sensor part A has a cap 15 on its head that prevents rainwater from entering, and a pleated insulator on its circumferential surface to prevent surface leakage current from electrode parts due to adhesion of water droplets, moisture, etc. 30, and inside the case 14, as described above, the optical fiber cable l passes through the center hole 5c of the disk electrode 5b and is divided into two stages, one end 1a of which is connected to B.
It is connected to the SO sensor 4a by a wire connection connector 13, and the lead wire 4 a / of this BSO sensor 4a is fixed to the upper disc electrode 5a by soldering.

Furthermore, one end 1b of the optical fiber cable is connected to the BSO sensor 4b by a wire connection connector 13, and its lead wire 4b' is connected to the disk @i5b at the bottom of the sensor section A.

As described above, the auxiliary electrode device of the present invention connects a flexible optical fiber cable and an optical sensor such as BSO within a pleated insulator, and connects the optical sensor lead portion above and below the optical sensor. Built-in and connected to the arranged disc electrode,
It is configured to be connected to an optical-to-electrical conversion measuring device, and its electro-optic effect can be used to accurately measure the spatial electric field strength distribution under high-voltage overhead power transmission and distribution live lines.

Furthermore, the number of folds of the insulator can be adjusted based on the setting conditions of the device, and since the creepage distance is extended by the number of folds, creepage discharge can be prevented.

Furthermore, the pleats can be used to prevent water droplets from adhering or getting wet on the insulator surface during rain, so the degree of contamination is lowered even during rain, and surface leakage current from the electrode portions is reduced.

As described above, the auxiliary electrode device of the present invention has improved performance, so it can be used to measure the spatial electric field strength distribution of power transmission and distribution lines in high voltage application fields, and to analyze harmonic components wrapped in power lines. It is applied in a wide range of applications, such as, and can achieve effects such as improving efficiency during actual measurements and being able to obtain reproducible measured values.

[Brief explanation of the drawings] Fig. 1 is a vertical cross-sectional view schematically showing a conventional cylindrical auxiliary electrode device for measuring spatial electric field distribution, and Figs. 2 and 3 are the same box-shaped auxiliary electrode device for measuring field distribution in space. A perspective view and a side view schematically showing the auxiliary electrode device, and FIG. 4 is a partially cutaway explanatory view of the auxiliary electrode device for measuring spatial electric field distribution according to an embodiment of the present invention. l°°° optical fiber cable, 4a, 4b...-BSO
Sensors, 5a, 5b... Disk electrode, 11... Optical-electrical conversion measuring instrument, 30... Creased insulator. Patent applicant: Sumitomo 1. ((Representative of Ki Kogyo Co., Ltd.)
Person Patent Attorney Kazu Hl 1989- Procedural Arrangement: 11 Yo 14 (Voluntary) Director General of the Patent Office Mr. Aio Wakasugi 1, Indication of the Case 1982 Special Crystal Application No. 118989 2, Name of the Invention For the measurement of spatial electric field distribution Auxiliary electrode device d 3. Relationship with the ministry case to be amended Patent applicant address 5-15 Kitahama, Higashi-ku, Osaka Name
(213) Sumitomo Electric Industries, Ltd. 4, Agent address: 1-18-18 Nakatsu, Oyodo-ku, Osaka (1)
) "Detailed Description of the Invention" column d5 for the specification, [Brief Description of Drawings 1 Column (2) Drawing 6, Contents of Amendment i [Contents 1, Specification page 3 page 4] First, correct the 5th line [leakage current resistance] to 1ilIi leakage resistance. 2, page 3, line 6, 1] "Actual measurement" is corrected to [Measurement I4-1]. 3. On page 4, line 3, "Measuring instrument part B" is corrected to "Insulating rod 2." 4. On page 4, line 6, [Rubber push-piece 1101 is corrected as [Rubber protection ring 10J]. 5, page 4, line 13, 1] "4a, 4bJ should be corrected as [4a1". 6, page 5, line 3, j-4a'j should be corrected as "4b". 7. On page 5, line 6, "4b" is corrected to "4a". 8, page 6, lines 19-20 r 4a, 4b-B SO sensor” to “4.4a-B
I corrected it to ``SO sensor''. 9. Figure 4 of the drawings will be corrected as shown in the attached sheet.

Claims (1)

[Claims] An optical-to-electrical conversion measuring device is installed outside, and the optical fiber cable led out from the optical-to-electrical converting measuring device is connected to the optical fiber inside a plurality of pleated insulators each having an insulating cap on the head and fixed at the bottom. 1. An auxiliary electrode device for measuring spatial electric field distribution, characterized in that an auxiliary electrode section is constructed by connecting a sensor and connecting the optical sensor to electrodes disposed at the upper and lower portions inside the insulator.